ok dumb question for me asking all you people that know tons about engines but here you go. What need to be done to a 350 stock to produce at least 400 hp with out high risk of destroying the engine? If some one could list as much info or redirect me to a site that can I would like it very much. O the 350 is going into a 83 camaro with a 700r-4 trans.

Thanks again

David

This should keep you busy for a while...http://www.camaros.net/cgi-bin/sbcombo/ugb3333.cgi

Look at a Summit cat or go on line under Summitracing.com and look at the crate engine section. Look at what was done to the 350 engines to bring them up to around 400hp. It really doesn't take all that much to do it.
I have a ZZ4 350 Crate Engine that came out of the box with 385 horse and all that they did was add a cam aluminum heads and a good carb. I added a better cam, rockers etc and now I am well over 400hp.
Schoon

Per D2k so take it with a grain of salt b/c it is just a sim. program...

One, big valve-headed, 10 to 1 CR, 350 with a 750cfm Holley 4-barrel on their 300-36 high-rise dual plane, a 282/282, 110/106, .473"/.473" net lift solid cam and just 1.625", 4-tube, long (open) headers should make right at 428hp at 6,000 and 430t at 4,500 rpm! (I'd use a good old CC 282S solid cam here)...

A cheap and powerful 350, imho....

NOTHING FANCY AT ALL IMHO..................

An early stock L-48 shortblock is right at 10 to 1 CR and is a very good starting point imho.... (Even tho GM says it is 10.25 to 1....)....

The 295hp and 300hp/350 motors here is all with big valve double-hump heads..

pdq67

For starters, stroke it. Add some Vortec or aftermarket heads and an intake, run 9.5:1 compression and a cam in the 230-236 range and you're there.

I think these numbers are inflated

http://www.strokerengine.com/sec383500HP.html
Torque 515 H.P. 471
383cid


AFR Street 190 Aluminum Cyl. Heads
9.5
Holley 750 cfm
MSD Distributor 34° Timing
Comp Cams 280 Magnum Hyd. Cam 230 @ .050 Dur .480 Lift
1 3/4" Headers
93 Octane Pump Gas

Id agree with that. Although that is a great combo(Well matched and good manners to drive)....and it would be plenty powerful, but high 400 horsepower and over 500lbs of torque is a little much for me to beleive out of a mild hydro cammed 383 with not a ton of compression either. Take 40-50 horsepower off and probablya similar amount of torque and Id beleive it.

Anyways...if you can stroke it and build a 383, your in good shape. If its just not in the budget though, you can still do it with 350 inches. To make 400 horses pretty easy, but still on a budget, invest in descent aftermarket heads. They dont need to be the best, but you want descent ones. Check out the Brodix iron killer 180's, canfield, trick flow, or edelbrock heads to name a few. For me, Id either use those IK brodix or the canfields(depends on who has better pricing) but any are capable. If you wanna get into a vortec setup, try out the edelbrock ETEC 170 heads. Also awesome heads, but they need a vortec style intake. If the pricing was right for the setup...these are another Id consider along with the canfield or brodix.

Couple it with a performer rpm intake, 750 carb, voodoo 268 lunati camshaft and a good tuneup with around 9.5-10:1 compression and your set. Good heads and a well matched combo will bring things along nicely(no need to get crazy with it). If you did stroke it to a 383, Id build it the same way but have more torque to boot from the extra inches! It will drive well and go fast. Use roughly a 3.73 gear and call up a converter maker with complet specs on your car and engine. Chances are something around 2500rpm stall will do just right....but you gotta call em up to make sure you get the right one. Converters act off torque. You can advertise a stall speed as much as you like, but thats why they all have the disclaimer that the stall speed is only estimated. Depending on how much torque you got, how heavy your car is and all that stuff.....stall speed will change with the same converter. So, you want them to spec one that will work for sure instead of buyin something thats advertised to work...but then have it stall too much or too little(which happens). No big deal....all it takes is a phone call.