kokamo

iTrader: (1)

Hey guys, just a quick question, how much can a stock LS1 motor handle? Isin't the compression 10:1? I was thinking around 5 or 6 psi with a good tune and 93 octane. It will be intercooled so that makes me think I can go slightly higher on the boost. I really don't want to go with anything too crazy, it's just a mild street 69 Camaro LS1 conversion.

Only mods are........

~Comp Cams 224/224 112 lsa (I know not the best SC cam)
~Pacesetter long tubes.
~Thats it, stock everything else.

Any input?

Thanks for your time,

Joe

vaticano

iTrader: (8)

8-10#'s is safe

tici

iTrader: (1)

Look at my sig + homepage... nothing crazy butmay help

kokamo

iTrader: (1)

Excellent guys, thanks for your reply. This does help.

Joe

ChevyChad

iTrader: (50)

8# MAX or 500rwhp, which ever happens first. Do a search...

Pro Stock John

iTrader: (34)

6-8, maybe 10 but at that point your timing might be getting closer to 10 than 15 so it's the point of diminishing returns.

You also need beefy valvesprings.

Zombie

iTrader: (2)

I did 16psi for a long time on my stocker. Seen around 20 on another stocker. I'd say 20psi would be the upper limit of reliability.

sworaz

iTrader: (13)

That's a lot of boost. Might as well go into the 30's I mean heck all the Evo'
s are doing it

Zombie

iTrader: (2)

I guess i'm just better than you

vetteboy2k

iTrader: (5)

I have been running 10lbs on my C5 LS1 with a cam/ls1 heads for over 2 yrs now (1yr TTI and 1yr APS). I have a friend that has 2 C5's both twin turbo'd (1 STS and 1 APS) both ls1 heads and stock cams running 10lbs. APS for 1yr and STS for about 2yrs.

I wouldn't push it much futher than that though unless you add some meth. Its mostly in the tune as were running 2bar custom OS from EFILive.
STS 500 RWHP and both APS cars approx 580 rwhp as these 2 have cams (turbo cam and 01 Z06 Cam)

DanWS6

iTrader: (5)

I was pushing 12psi on my stocker and now it's burning oil like crazy.

BLNLS1/RX7

iTrader: (2)

Anything over 8 would be taking a chance.

88GT&69ss

you could probably find a lot of info...if you tried using the search option ...

geeteego

iTrader: (1)

Turn it up until the ringlands collapse, then back off 2 psi. I maintain this is the ideal setting for a stock LSx motor.

Cchris1109

iTrader: (11)

i had 10 lbs for 7 months, just upgrading to a new motor for more boost

took apart heads, was fine nothing bad at all...and still runs like a champ at 90k miles

kokamo

iTrader: (1)

I did, and came up with a bunch of crap that did not awnser my question directly.

I knew I'd get a "try a search" comment, just like in about every question I see here.

Otherwize, thanks for the replies guys, I think I will stick to around about 5 to 8 psi until I can go with better pistons and compression ratios.

My thoughts exactly. I was just double checking. Thank you for your reply.



Nice!

Joe

ChevyChad

iTrader: (50)

Yeah, we REALLY need to get a sticky at the top of this forum for just this question! It is probably the most commonly asked question I think we all see in here. I can see how if you did a search you'd come up with 90% of the threads telling people to do a search

geeteego

iTrader: (1)

Agreed.

trever phillips

Oh nice idea I'm still stock motor its cool to see much they take! 12 psi low timing 13* fat a/F 11.6 I'm going to add some timing when she comes out to play. oh 602 ft/lbs 562wrhp @ 12

geeteego

iTrader: (1)

Only problem I see, is that if we put a sticky up there, then it gives the appearance that the membership as a whole supports the numbers listed by each car, and that could cause trouble.

So, if car a's motor, who on a ragged-edge tune, has made 600+ on pump gas, and car b's #7 ringland goes on vacation in the combustion chamber after 6psi and 450rwhp...he gets bent and goes crying to PSJ, Troy, and Walt Disney that the FI section is responsible for his engine failure because "we" said "his" motor could take it.

I know it's extreme, and really wouldn't happen, but it might be why there are plenty of other stickies warning about the cost of FI vs how much boost can I get away with before it costs me a new motor. Just too many variables, and too much that can go wrong even under ideal conditions.

Believe me, I was there...got the video.