of torque when used with #7111 intake and stock iron cylinder heads on a 350 engine. Any information would be greatly appreciated. The cast crank should be fine for street use even up to 6,800 rpm. Olds 403 Specifications. SKU. Time will tell. Can you guys tell me where I might find this sensor on the car? We know the basics, and the basics are important. It was a resin-impregnated cloth that you could form and then it hardened when exposed to sunlight (UV rays). High lift, short duration dual pattern camshaft offers improved mid-range performance. this camshaft and lifters will also work in a 330,350,403,400,425,455 .it came stock in your w-31 350 motors . We are not talking about a race engine, but a true driver that is reliable-something you can beat on. If I want to reproduce the numbers posted in the article, all I need are L92 heads, a Comp Cams XR281HR cam, an 850-cfm carburetor and manifold, a stock bottom end, and the same headers? OAI = outside air induction. While this can be retained, Bowers says the factory pump is difficult to adapt to earlier fuel tanks, and that can easily drive up the cost of the conversion. Edelbrock part #3712 Performer-Plus camshaft is designed for small-block Oldsmobile 350-403 V-8 applications. SKU 30420913. 901/382-8888 - Edelbrock camshaft and lifters 3712 , Hydraulic Flat Tappet, Advertised Duration 280/290, Lift .448/.472 Some of the more interesting ones are a trans tunnel kit ($347.38) and a mini-tub kit for $748.10. the Olds 455/403 Improved Power, Torque and Reliability Monday, April 26, 2010. 800/535-1161 3) specs. The Detail Zone instructions call for an idle fuel pressure slightly lower than the 43 psi needed at WOT. Cylinder Heads. More Info this cam kit will work with your factory rockers and springs .it has that iconic w-31 lope sound . The greater the pressure difference between the fuel pump and the atmospheric pressure in the tank, the more fuel moves. Next, I increased the torque by 22 lb-ft between 3,000 and 5,000 rpm and reduced the peak horsepower by 30 hp to 520 at 6,000 rpm. CAMSHAFT SPECIFICATIONS (Cont. ) $151.05. The 403 responds well to more compression and cam, and like all late 2nd generation Trans Am's a true dual exhaust. It has helped me with my projects. Cam, Olds V8 67-90 SP Solid . The Olds also has far smaller valves--1.995/1.50-inch versus the Pontiac's 2.11/1.66 pieces--and marginally lower compression (7.9:1 vs. 8.1:1). Find OLDSMOBILE 6.6L/403 Camshaft Kits and get Free Shipping on Orders Over $99 at Summit Racing! So, I suggest lowering your warmed-up idle in Park to around 700-800. This will make a bunch of torque in the usable rpm range for a street engine compared with the larger 281 cam. Big pistons and a short stroke are an excellent combination for a high-RPM engine, but here the other inherent 403 weakness comes into play: Windowed main webs, and to a lesser extent, siamesed cylinders. Add to Cart. Been gathering parts/data, since 2014. You can order any of these parts directly from Percy's on the website. Selecting a Hydraulic Cam for your Pontiac Engine. I am by no means an olds expert, but a 350 cube motor with low compression and a big cam is going to be a dog. The fiber is easily malleable by hand to create the desired shape. $318.62. The program estimated the run at an 11.52-at-114.9-mph pass shifting at 7,000 rpm. The people at COMP Cams®, along with a lot of top engine builders, have spent many years improving these and other Chevrolet powerplants. As for your engine temperature concerns, it first sounded like the gauge you were using may not be accurate (which is a common problem, especially with factory gauges), but looking into the factory fan settings, it appears these high temperatures were intentional. Pvt_Murphy. I also left the vent line uncapped. Reseda, CA For the '04-and-older two-valve Ford mod motors, Bowers' system is a little different from most. There was a stock class 403 in a Trans Am that turns 7500 RPM. first off the cam doesnt have a choppy lope idle for me. A friend had a 350 Chevy ready to be assembled but never did. Part Number: MEL-CL-SOC-9. The bottom line here is that you could spend roughly the same amount of money to have a stock set of cathedral heads CNC ported and match them to a milder camshaft and you would have an engine that makes great power and is very tractable on the street. This results in a compression ratio around 8.0 to 1. How about some help? The stock iron Quadrajet 4bbl intakes on the 350 and 455s are pretty good. CarCraft@CarCraft.com I'm running a stock mechanical fuel pump with no return. The reason the factory intended these engines to run so hot was strictly to satisfy emissions demands. The programmer can also allow you to change the rev limiter, speedometer calibration, and shift firmness and timing along with a slight change in timing and air/fuel ratio to produce a little more power, but you didn't mention those items. Apparently the sensor is tied only to the light on the dash, so it does not contribute to illuminating the check engine light. That is a lot of piston for a small block. As an example, West Coast Racing Cylinder Heads offers a Stage 2 CNC porting operation for the stock LQ4/LQ9 317 cathedral-port heads that will flow virtually the same numbers at the midlift up through 0.500-inch lift as the L92 heads while delivering far superior port velocity. ... Cam to W31 specs - Hydraulic flat tappet valve lifters - .842; Matched valve spring set; ... MS. We stock a broad range of engine parts for passenger cars, small trucks, marine, diesel, industrial, agricultural and high-performance applications. Nice aftermarket aluminum intake & carb combo. Edelbrock part #3712 Performer-Plus camshaft is designed for small-block Oldsmobile 350-403 V-8 applications. The first is to use the existing Ford OE wiring harness and computer. this is an oldsmobile factory w-31 replacement camshaft and lifters . I had this cam in my Hurst / Olds. The Olds 403 was found in a variety of General Motors vehicles from model year 1977 to 1979. .050" lift. The 403 4A Olds head is a 83 cc smog head. All these parts taken as a whole represent a sizable investment, but you can do this a step at a time, spreading the cost out over a year or so, and still drive the car between mods. A perfect combination of mileage and power. I was not impressed with the performance and realized it had too much cam. In '05, Ford converted to electronic throttle. Try to find a set of 1968 to 1972 Olds 350 heads. Wish List Compare. This is slightly less expensive than the integrated material but will require more skill. Oldsmobile Cutlass Supreme Brougham Colonnade Hardtop Coupe 403 V8 Turbo Hydra-Matic (aut. Howards Cams, American Muscle Hydraulic Flat Tappet Camshaft, Oldsmobile 39 Deg. 1977 Oldsmobile Cutlass Supreme Brougham Colonnade Hardtop Coupe 403 V8 Turbo Hydra-Matic (aut. So if you want, you can merely unhook the connection and go back to manually checking the cooling system level. $172.22. But for a mild street engine, I believe the more conservative cathedral-port heads are a smarter choice. So that idea is also not going to work. The only snag we see with the Hypertech Power Programmer III, (PN 345752) is its $399.95 price, which seems a bit steep just to change the fan temps. We have also learned a few tricks along the way. Add to Cart. Good luck. As for the 455s, Lunati makes an excellent one with 224 / 234 duration ( @.050 ) and .496 / .520 lift. The 403 is an interesting engine, technically a small block Olds based on deck height. Torrance, CA Jet also makes a similar GM programmer that offers the same features plus it shows a slight gain in power with some additional tuning. I highly recommend Erson and PBM. Of course, ease of work and application mean this stuff is a little more expensive than fiberglass. The same size dry twill weave cloth costs $204.33, and then you must add the resin. gears. CarCraft.com We completely missed that little clue because we were focused on making sure the valves didn't hit the pistons. Fair idle. According to Bowers, Ford used two types of fuel injectors on the mod motors. Stock-style valvetrain; use longer pushrods and shims to get proper preload, if necessary. 455 OLDS TO Lubrication Stock Olds oil systems cant cut it over rpm A 5B]hp engine a better oil pan as the 7-quart-with.filter Milodon used this a od pump, and instal- lation of oil,rostrictor p'ugs in the main-bear. no relation to the grind performed on the lobes. Drag Race Solid Flat Tappet Cam - Oldsmobile V8 288/296 . JM18-20 cam from Mondello. The LQ4 engines are rated at 9.4:1 with a dished piston, while the LQ9 engines enjoy 10.0:1 compression using a flat-top piston, which means we actually had the better LQ9. In the story, we claimed that the engine was a base, iron-block LQ4, because that's what we thought we had. It's tedious work, but you can extend the length of the harness if necessary to allow you to place the computer where you desire. I want to install a "9" cam into a 350, should make a nice cam matched to 3.42 gears!! The 403 was advertised as being lighter than previous motors. 573/346-4409 chiefly by the pattern of chamfers on the front OD, the location of the The result is a compression ratio of around 8.0:1. $151.05. 350 chevy won't touch a 403 Olds. If running both a windeqe trav and main-cap straps. The baseline test for the story included a GM Performance Parts Hot cam with specs of 219/228 degrees of duration at 0.050 tappet lift and 0.525-inch valve lift for both the intake and exhaust using the stock 1.7:1 rocker ratio. The box also incorporates necessary fuses, relays, and other connectors and then the stock Ford computer plugs in to that box. There is a larger question, however, that should be addressed. Small Block Chevrolet Factory Cam Specs by part number Part # • Lifter type • duration at .050 In/ex--Lift in/ex • centerline • description • Small Blocks 3849346 Mechanical - 254/254 - .484/.484 - 114 - 327 365HP& Z-28 302 In the original story, the swap to the rectangle-port heads and big cam sacrificed mucho torque below 4,800 rpm. Costa Mesa, CA DickMillerRacing.com, Edelbrock The iron heads might be cheaper once they're rebuilt, but the flow probably won't be as good. We also spoke to Mark McPhail, an ex-GM engineer who has worked with us on many Car Craft projects and who now does aftermarket ECU programming and tuning. Perf Marine, ST thru 79 Notes: Overlap is in degrees. 403 Olds engine cleaned and bored .024 ... did you mention any porting of the heads so I do not believe you will be making the power to warrant replacement of the stock components. Jeff Smith: The story you are referring to ran in the May '07 issue where we used a stock, 6.0L short-block to make this power. A perfect combination of mileage and power. When you do the research on the Olds 403, you get a very broad range of opinions on the web ranging from "the blocks are no good" to "these engines can be made to produce some decent power." The 403 despite having a piston wider than a 454 Chevy, it is still based on the small block Olds. Do you know of any way the ECM can be adjusted to modify these settings? 818/705-5454 Higher atmospheric pressure pushes on the fuel in the tank, moving the fuel toward the engine. Olds 350 400 403 455 Ultimate Cam Kit W31 CAM 232/232 474/474 LIFTERS TIMING. my 77 Cutlass Supreme 403cid 350th 8.5 10 Bolt The universal problem with reviving old cast-iron heads is that by the time you've invested in new guides, a valve job, new stainless steel valves, filling the heat riser passage, and filling the depression between the center exhaust ports to prevent header leaks, you've got more money into a set of stock iron heads than the price of a pair of brand-new aluminum Edelbrock heads. It also is somewhat troublesome, and corrosion or debris in the cooling system may arbitrarily trigger the light. Specs @ 0.50 Cam Lift Opens Closes Duration SAE Specs@ (0.06/Rocker Arm Ratio) Cam Lift Opens Closes Duration Cam Lift Gross Valve Lift Center Line C/L Rocker Arm Ratio Valve Lash Clearance EXH. This second option seems to be the most ideal as it will keep your engine operating somewhere around the 190-degree mark. Hypertech Try this - Free flowing 2.5" dual exhaust, Headers if available. We offer an exact factory duplicate camshaft for all Cutlass, 4-4-2 and Hurst/Olds … Olds A4 intake. These hydraulic lifter camshafts are dyno-matched to Performer RPM manifolds for high-rpm horsepower while still maintaining acceptable low-end torque. Engine & Trans Mounts. He creates a box that allows you to individually wire in each separate sensor or control wire for the engine. This is the one I use to store fuel, but every once in a while I try to use it to pour gas into one of the cars. Better Living Through Chemistry To take full advantage of all that power, you also must shift the engine at 7,000 rpm or higher. Runs best with aftermarket aluminum intake, up to 750 CFM 4 barrel and headers with free flowing dual exhaust. Horsepower Secrets by Chris Hemer, Musclecar Review – How to make a stock-looking engine run like the wind. 800/292-1940 DMR sells a set of Edelbrock aluminum Olds heads for $1,675, but keep in mind that these heads also require aftermarket aluminum roller rockers that will also pump up the price roughly another $250. Roller lifters and cams were in all 1986 and up 307's, and most Street/Strip Solid Flat Tappet Cam - Oldsmobile V8 276/284 . I vented the tank by modifying the gas cap by removing the restrictors and drilling a hole in it. A 1977 Oldsmobile Delta 88 served as the official Indy 500 pace car, marking the fourth consecutive year that Oldsmobile held the title. this cam kit will work with your factory rockers and springs .it has that iconic w-31 lope sound . Find OLDSMOBILE 6.6L/403 Oldsmobile V8 Parts and Accessories and get Free Shipping on Orders Over $99 at Summit Racing! The early EV-1 injector uses a rectangular wire harness plug, while the subsequent EV-2 injector employs a smaller, oval wire plug. But in the photo in which we show checking valve-to-piston clearance, a reader caught flat-top pistons that are actually used on the higher-compression LQ9 engine. HyperTech.com, Jet Performance Products Higher rpm imparts more stress on cast pistons and those stock rod bolts. Part No. With one of those 1-inch hoses on the end of the jug, it takes forever to pour fuel into the car because there's no vent. Cam, Olds V8 67-90 SP Solid . The Edelbrock Performer cam is an excellent one to use in a 350 or a 403 especially with an automatic transmission. With what you guys at Car Craft have done before with other oddball engines, we know you could build good horsepower and great torque. This cam sells for $209 (PN 210-4) and will make some serious torque when combined with the Edelbrock Performer RPM intake you mentioned (PN 7111) and a set of 13/4-inch headers. Improve the oiling system. JHoop. These initial dyno tests were outlined in the Apr. Next, we added the GMPP Hot cam and the engine improved to 450 lb-ft of torque at 5,000 rpm and 483 hp at 6,000 rpm. Curing the final product is even easier. According to Oldsmobile's Engine Assembly Manual, the W-30 four-speed cam was tamed to #409759 with 294/296-degrees advertised duration and .472/.472-inch lift. But First of all, you would need a forged crank. The Olds 455 engine was created out of the 425 engine in 1968 by changing the internal workings. Choose one of the categories below to narrow down your search, or scroll through it all if you want to browse. I was first challenged by a good friend and GMC owner, Arch as he likes to be called. $172.22. From your description, it sounds like a simple case of insufficient venting. Each suggestion will improve performance, but it will not turn a worn out, 200,000 mile oil burner into a ten second quarter miler. The original baseline with the stock LQ9 cam certainly benefited from this additional compression, making 439 lb-ft of torque at 4,400 rpm and 425 hp at 5,600 rpm. Does anyone make a stand-alone harness that will work? With the 180-degree Hypertech thermostat, the fans will kick on at 213 degrees and shut down when the engine temperature falls to 205 degrees. The Forgotten Olds 403Tim Campbell; Morristown, TN: Many people have the Olds 403 engine in their car and would like to upgrade. The difference in compression is roughly a half point, which is worth less than 2 percent power. V8 260-455 1967-1990 Advertised Duration: 272/294 EDELBROCK PERFORMER RPM CAMSHAFT FOR 350-403 V8 OLDSMOBILE - 7112 PERFORMER RPM CAMSHAFT FOR OLDSMOBILE Designed for street high-performance applications, Performer RPM cams provide power from 1500 to 6500 rpm. Assuming you will stick with a stock converter and gearing, Miller suggests a relatively mild hydraulic flat-tappet cam along the lines of a 219/233-degrees-at-0.050-tappet-lift cam with 0.476/0.508-inch lift and a lobe-separation angle of 110 degrees. World’s top manufacturer of performance camshafts, lifters, valve springs, rocker arms and related valve train parts for all race and street performance engines Oldsmobile - Camshafts - Products JavaScript seems to be disabled in your browser. Chester, PA Find OLDSMOBILE 5.7L/350 Camshaft Kits and get Free Shipping on Orders Over $99 at Summit Racing! 3712. It was a very oversquare engine, lightweight for it’s displacement. The fabrication work on the suspension is no problem, but what difficulties will I run into with the wiring and PCM? He mentioned that even an average street Oldsmobile 403 would benefit from the typical improvements involving heads, intake, headers, and cam timing without having to go too deeply into the engine. Hot Trans AmEric F. Marx; Racine, WI: I have two problems relating to my LT1 '95 Trans Am Firebird. I installed the motor in an '83 G-Body Olds wagon. 831 S. Douglas St. The beauty of the HyperFiber is that the resin is mixed in the proper ratio with the cloth and then covered with a dry film on both sides of the fiber so no mixing is necessary and your fingers don't get all sticky. Mark LeBlanc; New Orleans, LA: I really enjoy reading your magazine. my 79 pontiac trans which came for mthe factory with an olds 403 and my pontiac firebird 40. whats the proper procedger to breaking them in … read more. It is much like trying to pour liquid out of a closed container with no vent. The 403 has Siamese bores (making overheating in this area an issue). If this is the plan, work slowly, do one wire at a time, and remember that each connection will need to be crimped using non-insulated butt connectors and then protected with shrink-wrap. Add to Cart. Edelbrock.com. Bearings. The bore was kept the same and the stroke was extended. Ask Anything-We've got solutions! Olds rates duration at zero lift, while most cam manufacturers rate duration at 88hurstolds . This will be modified along with the heads to create a matched performance package for power between 2,500-6,500 rpm. Cam specs play a part as well. Induction. Ron Francis/Detail Zone The trick is to work with this stuff inside, away from direct sunlight. im running a comp cam xtreme energy cam CL42-223-4. Part No. If you've ever worked with fiberglass, you know that mixing the resin with the layers of fiberglass is a messy proposition and difficult for a rookie to do correctly. The 403 had a 4.350”. The engine is in a 79 TransAm, th350 and shitty 2.4? The intake manifold will be an Edelbrock Performer RPM Olds 350 (PN 7111). Oldsmobile - 260, 307 (5.0L,) 350 (5.7L), 400, 403, 425 & 455 (39° bank angle) Performance level 2-3 - Power Compu-Pro - These cams provide excellent low end and mid-range power and extended rpm range for spirited street and offroad driving. Or, you can opt for the 160-degree thermostat, and the programmer will trigger the fans to come on at 192 degrees and shut off at 185. All the other Olds blocks have water jackets between the bores. biggest cam for use w/ stock converter. Post Feb 18, 2019 #1 2019-02-18T21:12. Out of stock. Scoggin-Dickey Parts Center Hotter cam with stiffer valve springs, the usual tricks. This makes wiring the individual sensors much easier, and then you can route and bundle the wires in a way that best fits your vehicle. Aluminum and plentiful. That's it as far as the cam goes. It is difficult to see and you may need to remove the battery to access the sensor. Moreover, Edelbrock has revised the Olds head with improved flow, the combustion chamber is larger at 77 cc, but that will still gain some compression over the stock 83cc heads. These lifters are of 0.921" variety. Once formed, the HyperFiber can be drilled, sanded, painted, and ready for use. ST = standard trans The problem is the heads. No clue on duration. The Oldsmobile 403 was a pretty short run engine produced from 1977 through 1979 and while it appeared in some performance minded cars of the era like the Firebird, Buick Riviera, and Olds 442, it has never really been looked at as a serious performance engine but the larger hot rodding populous. Create an account Forgot Password? Not Yet Reviewed. I am looking for the product I read about a few months ago. Easy Returns. This makes less power and also makes the engine more prone to detonation. These pumps operate by creating a low pressure area in the fuel line and tank. Owner,Technician. The production Oldsmobile 403 also suffers from the typical late-'70s handicap of lame 8:1 compression by way of large, 83cc chambers. This occurred because the added torque in the middle helped accelerate the car more efficiently with the car's street-oriented 3.55:1 gear and mild stall speed.

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