I want to beat LS1's, 302 block or 347?

[GRGT1994]

I test drove an ls1 camero at a used car dealer, and yawned all the way. I was thoroughly unimpressed. That was before I had my Mustang, and had only my Grand Prix GTP to compare to.

Hey, someone mentioned the poster should get AFR 185s. Will those fit with a stock block, or will there be piston valve clearance issues?

 

[4Jenna]

Those are 2.02 heads..pistons need to be notched

 

[Nucking Futs]

Havent seen you for awhile!

Did you buy a fully built 347 that you dropped in, or did you build your own?
Im looking in the next 2 years to sell the Vortech, and use that money to buy a 347 Longblock (since I have stock heads). I know they run $5+K for the ready-to-drop in DSS and others.

Thanks
RC

Howdy, built it myself, however if I had to do it all over again I would have just bought a long block from CHP or DSS and be done with it. The length of time it took me I could have put three in if I had bought a complete set up.

You can find them a little cheaper than 5K I bet. Just takes some looking around. If you really wanted to get radical just put a 393 between the fenders. Not much more money but you would have one beast of a car.

 

[Venom351R]

I thought they were factory rated at 340hp. Must be flywheel. my bad.

They dyno around 310-320 RWHP.

 

[pwcracer]

Could this be right?

I was talking with a local engine builder here, and he told me it would cost about $3000 for a 347 Short block. I have found some in the ford mags for around 2k. He also told me that if I put on a SC, my engine will be crap in 10k miles..

 

[95snoozer]

i have one main comment

LS1s can do mods to. do you want to beat stock ls1s? ls1s with exhaust and lid? full exhaust lid? lid tb full exhaust and cam?

i personally infer you want to beat the latter

In this case, 347 with afr 185s or trick flow track heats with some exhaust work.

grab a 347 with the twisted wedge relief pistons from dss or www.coasthigh.com

run a nice cam, a custom grind or a good off the shelf like a comp 282

get a good intake

rpmII or holley systemax II

 

[CManT1914]

I was talking with a local engine builder here, and he told me it would cost about $3000 for a 347 Short block. I have found some in the ford mags for around 2k. He also told me that if I put on a SC, my engine will be crap in 10k miles..

on that supercharger comment. I've been researching superchargers lately, and as long as you don't run obscene amounts of boost, like 12+, and you get it tuned decent, then it will be fine. I'm only gonna be running 6 lbs for a while, and everyone was saying that would be NO problem.

EDIT: Just noticed I resurrected this thread. pwc, did you ever decide what you were gonna go with?

 

[mackey]

If you do get a supercharger, go Paxton or Procharger. Best two companies in my opinion with plenty of room to grow.