I just got an 86 Iroc that has a 350 4bbl engine. I have a friend that I'm getting another 350 from and I am hoping to get that engine to do 11's in the quarter. I am going to rebuild it, but what should I do to accomplish this goal. How much will it cost?

 

I'd start by stroking it, is it a EFI? or carbed? If it's EFI Take a look at Traxions ride Or Guido's
Both minirammed.

 

It is a carb.

 

The 383 I had was able to run 11's but it wasn't streetable. Depending on how heavy the car is, you're going to need about 500 rear wheel HP. Also if you can get that much HP, you need to be able to get it to the ground so suspension improvements will be required also.

You can get into the 11's easier is the car is lighter. It takes a lot more HP to push a 3700 pound car into the 11's than it does a 3000 pound car.

It's going to depend on what you want the car for. If it's an all out drag car then 11's isn't that hard. If it's a daily driver with occasional track time then it'll get expensive.

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Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block

Best ET on a time slip: 11.242 altitude corrected to 10.89
Best MPH on a time slip: 121.52 altitude corrected to 125.89
Altitude corrected rear wheel HP: 497.9
Best 60 foot: 1.546

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

 

Your going to need 440 flywheel hp. That should allow you to have a less than full race suspension and still pull upper 11s. You really need to optimize the launch (60foots in the 1.6s or low 1.7s) and making sure the engine is just past the hp peak at the end of the 1/4 mile. Depending on what gear you use, (at least a 4.10), this will put you at about 6000 at a little below 120.

You can't really make 430+ engine hp in a 350 without a real good set of heads and a current design hydroller. Save your pennies, get a set of heads first. Then try to get a cam and rear end gear that will maximize the performance of the heads. Make sure you keep weight to 3300 max (3150 would be real nice). Every 90lbs is .1 second

I have seen a 283 run 12.1s at 110 all day long. But it was an old superstock race car with a 4link suspension. So, it can be done without lots of hp, you just have to have everything else if you don't have hp.

Look here for some calculators and rules of thumb.
http://home.tampabay.rr.com/yz250/calc.htm
http://web.camaross.com/bb/Forum1/HTML/064278.html



[This message has been edited by jcb999 (edited June 29, 2001).]