Street engine

I want to have a street engine built. The goal is to get the maximum performance while still being streetable. I'm looking at using a 429CJ block, the aluminum CJ heads, a 4.3" stroker crank, H beam rods, forged pistons, and hydraulic roller cam. Not sure what compression ratio to shoot for for 91 octane fuel. Also not sure of cam specs to shoot for. Would like to use dual plane intake with around 750 CFM carb.
Anyone got any suggestions?

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Bob M
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63.25.252.215 Some suggestions...
No score for this post August 8 2001, 12:27 AM

A 750 will be WAY too small on a stroker, unless you plan to use two of them. \=^)
Try to get the compression between 9.5-10.5:1...You'd be surprised the compression you can get away with on pump gas using aluminum heads, a quench chamber, and a cam with lots of over-lap.
A minimum of an 850 carb...a 1000 or so Holley HP would be better. A Stealth or Blue Thunder would be the best dual-plane intake.

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Walt Barnes
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206.160.223.168 What do you mean by streetable
No score for this post August 8 2001, 5:34 AM

If by streetable you mean that you can drive to and from the track, but you want to optimize for the strip, them make that roller cam a mechanical. For a little more adjsutment hassle you will pick up about 20 to 40 HP. And if you don't need vacuum for power brake you can get pretty radical. Can you tell me what RPM range you want to engine to run in? And what stall you want to run.

OTOH, if you want the most fun you can have on the street, I'd recommend the Edelbrock heads. And 750 CFM is OK for just 429 cubes. But scale up the CFM for your displacement. And speaking of displacement, I've got a friend who's been talking to Drew Marine. He's got a crank/rods/pistons you can get balanced and ready to go for 570 cubes for about $3000.

The other big item you forgot to tell us is your budget. $5000 gets you one thing, $10000 gets you another.



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Chris C
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168.73.245.58 Street engine combo
No score for this post August 8 2001, 9:36 AM

I agree with the others, you absolutely need more carb with that motor. 950HP if you want to stay with a 4150 style, or a 1050 Dominator if you want to run a little better at the track. Cam should be around 245duration, .650" lift if you're going with a hydro roller, advance it to give good street manners. Basically, you're just building a Ford Racing 514 crate motor, look at their combo and power production and see what you'd like to change. Weiand Stealth is probably the best choice for a dual plane.

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Gary
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12.13.226.15 What Kind Of Car?
No score for this post August 8 2001, 10:48 AM

What Body You Are Putting This In Will Decide How Much Cooling Or The Size Of The Radiator Isn't Much Fun If It Doesn't Run Cool.

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forest
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12.81.195.206 kind of car
No score for this post August 8 2001, 11:17 PM

This engine is for a street driven Pantera. It needs to pull vacuum for brakes and be tractable both around town and on the highway. Cruising rpm is 3,000-3500. Is a 460 flywheel the same outside diameter as the cleveland it will be replacing? Radiator is 5 row brass/copper and has cooled a 500 HP blown, injected cleveland without problems. Will probably rarely see greater than 5500 rpm except for dyno run bragging rights and rarely run on the strip. Might try some open track.
Thanks for all the input.

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Walter Barnes
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206.160.223.168 OK - Now I can make an educated recomendation
No score for this post August 9 2001, 7:10 AM

First, how will you get the 429 to fit??? Oh well, I assume you know how much bigger it is than the 351C. Also, I don't know of any available transaxle that will stand up to the 460. Although the HP may only be 40% more than the 351C, the torque will be more than twice as much. And torque is what breaks gears.

You still didn't say how much you want to spend. If you budget is less than 10K, go with a stock cast 460 crank, the truck/CJ rods, ported Edelbrock heads (don't skimp on the talent to port them), and the smallest roller cam you can find (it will still be lifting .6 or more). For your low RPM application you can skip the oiling mods but go with a quality balance of the lower end. You can overbore most 460 blocks a lot, certainly to 60 over, maybe 80. Some people have luck at 150 over but have anything over 60 sonic checked.

If you want to spend another 5K, go with the Drew Marine stroker kit for about 570 cubes. But do ask your tranny builder how they will cope with 800 ft/lbs of torque at 3500 RPM. Some people say at 570 cubes the aluminum CJ heads are the way to go. But the flow data I've seen says the Edelbrocks are better. And if you want to pull from 2500 to 5000 then the Edelbrocks are right for sure, no matter how many cubes you've got.