Jason 98 TA

iTrader: (4)

For a budget you can get a TSP 427 LS3/L92. That short block with either the PRC 237 heads or PRC LS7 heads & hollow stem valves would work really well. If we go LS7 we'd kick the bore up a little bit & run a little bit smaller exhaust valve. That combo would give you awesome power at a little bit more $$$... I guess a good question is what intake do you plan on running so we know what type of head will work well for you.

Jontall

I have been looking at your motors, but can't figure-out the pricing. An LSX block is $2000; A 427 Compstar rotating assembly is about the same; that's ~$4000, but the assembled motor prices out at over $6700. Please explain this to me because I'm trying to learn.

99blancoSS

iTrader: (115)

You need to pay someone to machine it and assemble it and the LSX block has a few nuances that make it extra work. Our LSX 427-454 is $6610, these things don't just go together like a snap together model. Your paying for it to be balanced and blue printed assembled correctly.

noyz1

iTrader: (1)

what kind of shot will it handle? I'm also looking for a short block that will handle a large dose of nitrous- car weights about 4000lbs with me in it.

Dom

iTrader: (2)

I've been contemplating the future since I have 120k miles on it and don't want to waste time/money getting a top end when the bottom end might not last. This was my progression.
1.Rebuild 346, add top end
2.Rebuild 346 with 383 stroker crank, add top end
3.Get 402
4.Get 408
And now I'm on
5.Get 427 LS3 based short block with ported LS3 heads and ported LS3 intake.

I'm looking to get 550-600rwhp out a 427. And it still should be very streetable. It will hopefully run very low 10s, maybe high 9s. I would be very happy and won't need any more for a long time(I say this now haha).

Reason I probably won't go to LSX 454 is the extra weight. I'm not just a drag racer, I really like the handling aspect. I will try to lighten the car up as much as I can once I get a daily. I had a gutted fbody before and it was a dream to drive on the street. It was probably 32xx lbs.

Jontall

I thought a Compstar rotating assembly was balanced before it left the factory. $2700 seems very expensive to machine a LSX block and assemble/install 8 pistons with rings. How much does Erik get to just machine a LSX block? I could then buy the rotating assembly and find someone to assemble it. I need to save money here because I don't have a disposable income.

Billiumss

iTrader: (11)

4.100" bore on a LS3 block ???? Doesn't that =

I thought the safest max bore was 4.080"?