AlienDroid

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Rpm2800:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by AlienDroid:
<strong>The ricers seem to agree that 18 psi is the most you should have on pump gas. I dont see why it would be any different for domestics.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Bore size has alot to do with detonation and how much boost you can run. Also many other cars even many domestics don't have trouble keeping the heads down like Ls1's do. I don't think you will see too many pump gas 18 psi Ls1 motors.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Yes you will have to upgrade your whole drivetrain, and do some engine work, but if you have the money and decide to build an iron block ls1 with forged internals like ls1motorsports, then I'm pretty sure you could run 18psi with the right engine buildup. With the right fuel system and t76 turbo I'd hope it would scratch at the 800rwhp area on pump gas. Get a t88 and you should have no problems with 8xx rwhp on pump gas. You would need a new fuel system, very good engine build up with low compression ratio.

Not that I'm going to try this anytime soon, but I like to think I have options.

VINCE

iTrader: (1)

WE are way ahead of you burnout. I am going with the 6.0L heads when I go FI.. I am building the shortblock now. Then I am getting the heads and having them ported and polished and drop the compression down closer to 9.1:1.. I am going to use 2.05 x 1.60's.. Port work is going to emphasize on the exhaust ports..

BurnOut

iTrader: (1)

VINCE- just makin' sure that I'm singin' the same tune as everyone else... <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

99 WS6

Just a technicality, but the 427tt is a C5R block, not the LS1 <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" />

WEASEL

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by WEASEL:
<strong>SO...does this new grind that Thunder's testing, the 230/224, sound like a good cam for a single turbo setup???

How about the 111 lsa? This, on an A4, of course with tuning. I know the masses say 114 is best but even Rob said he prefers the 112 so is 111 gonna pose any hiccups with a turbo or what?

I can't afford $6000 right now but I consider myself in the prep stages while still bumping up my HP. That gives me time to watch the betas with different setups.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">NO NO! I didn't actually WANT an answer. <img border="0" title="" alt="[Roll Eyes]" src="images/icons/rolleyes.gif" /> I just like typing out loud. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

calebs01formula

The 6.0 truck heads were my original plan to drop compresion i was worried about loosing flow though, does any one now the numbers on the lq4 heads verse the ls1 stock for stock. Also does anyone know the actuall compression numbers id be looking at with the truck heads on my stock short block.

VINCE

iTrader: (1)

Flow #'s are similar to LS6 heads and the compression is dropped to 9.5:1 if you just bolt them on. You can open them up a bit to lower the compression some more.. If you are going boost I would build the shortblock first.. Just my 2 cents. I know about detonation..

calebs01formula

Vince i would agree with yah man, if i ever planned on running more than 7pounds of boost, but on a street car i really dont see a need to run more. And i beleive i can run a consistant strong car on a boosted stock short block as long as i run things safe and have a good tune. Besides im only looking for mid ll's and trap over 120mph lol.