Stock Bottom & Boost - Reliability List

[sujomatt]

I think another question would be who tunes them. If tuned like doo doo i wouldnt be surprised these cars r blowin up.

[white01ss]

Originally Posted by sujomatt

I think another question would be who tunes them. If tuned like doo doo i wouldnt be surprised these cars r blowin up.

Certainly a car tune on the ragged edge trades that little extra power for reliability, but that's not what this thread is about. It assumes that we are driving street cars and they are tuned for safe street driving. For centri cars that means an AFR of 11.1-11.7 @ WOT and timing around 17 degrees. Turbos want 10.7-11.5 and less than 15 degrees timing. Those are only baselines because every engine is a little different.

This thread is about boosted stock blocks. They have pistons, rods, rod bolts, main bolts, rings, head bolts, etc that are designed by GM to safely handle about 350 rwhp. So pushing ANY stock engine that wasn't build for boost from the factory 50-75% over stock power levels is just asking for it.

The question is how long will it last at different the power levels? SDCE told me that they rarely push stock LSx motors over 500 rwhp. So if longevity is a concern then keep it under 500.

[ProjecT 9]

Originally Posted by Spectre86

are you on meth injection or just strait pump fuel?

No meth, just 93 oct.

[MadIceV8]

Thanks for keeping the replies coming. Updated to this point.

'Trust' - I like the way you organized it. Maybe I'll change over to that.

maxgee - What type of FI?

[smokin2001formula]

I had a Vortech v-9 G-trim head unit with aftercooler. I was running about 8-9 pounds of boost. Brand new Jasper engine, and it lasted for 3,000 miles. AFR was 11.5 at wot. Not sure of rwhp. First dyno pull cracked the front main seal. Then it was downhill from there. Had massive amounts of smoke coming out of breathers. Figured out it cracked the # 5 and 7 ringlands. Lesson learned don't go into forced induction if you don't have the bank roll to back it up. It is very pricey when things go wrong.

[Garrett114]

P1SC 9# H/C 610RWHP 570RWTQ no meth. I put the charger on at 9,000 miles and still working fine so far 22,000 miles later

[yessir]

should indicate in list the type of engine also ls1, lm7, lq4, ls3 ect........

[smokin2001formula]

FWIW I had an ls1 engine when mine went down.

[MadIceV8]

Originally Posted by yessir

should indicate in list the type of engine also ls1, lm7, lq4, ls3 ect........

I've only been including the LS1/LS6 5.7 motors as stated in the 1st line.

[Stelth]

D1-SC
Stock unopened 2002 LS1 (valve springs only)
60K driven hard before blower - now at 75K
14psi at 7000 rpm with 3.9 blower pulley and big filter
520 rwhp
126 mph trap - 3900 lbs

20 + track passes , have hit rev limiter set at 7150 rpm many times (bad auto)

Car gets driven hard on and off the street.

Only pump fuel used but have big fuel system & FMIC

Engine has not complained yet.

I believe it's all in the tune !

Car is in Australia

[Striker]

Seems like if you can keep it below 500rwhp you can be safe on the stock rotating assembly is the bottom line. With a safe tune off course.

[dreamls1]

Tc76 ----- 8-12 -- 673 -- 94000 -- 94500 --n

[Reject]

Originally Posted by MadIceV8

Here is the format I'd like to see it in:
- Type of Forced Induction (Turbo/Supercharger)
- Boost Amount / RWHP
- Miles on the car when FI installed
- Miles ran since FI has been on the car (ie: current mileage)
- IF you broke the motor, list what was broken.

Turbo TC76F1
Boost 16 pounds
86 when installed
90 on the clock currently
nothing broken yet

[mcmillion]

TURBO, T-76, 9-12 PSI, 600 RWHP, 105k, now 115k, Nothing Broke

*pro-tuned, 91 oct, 6.0 heads

[MY99TAWS6]

I am very impressed to see such high numbers from stock engines. I know personally 2 local guys one had sts lt1 and one had ati lt1. Both took out there pistons pretty quickly,one guy lost race to heads/cam/headers bolt on ls1 buddy and tightened up his pully to think 8psi lost ringland almost right away.Sts car had problem with boost controller it went not sure how high up and again ringland let go. So can't possibly see how some of you guys are getting the stock hypercrap pistons to live this long. If it was me would run 5 to 7psi with most turbos and mabye a bit more with 317 heads lowering compression. Past that well I would make sure you have the money to back it up if the engine goes boom!

I went straight to forged engine feel a lot safer with that.

[Reject]

i was scared at 10 then i was like fkk it, lets try 11....hmm that wasnt that bad 13 now... i like this....14 hmmm i'm kinda nervous 16 fkk i maxed out the 2bar sensor. lol

to me i know it's going to blow up but i wanna see how far i can get away with playing with fire before it engulfs me

i know hellbent has taken a junkyard to over 850 hp more than a couple of times... didnt last worth a shit but it was fun while it lasted

[V-seriesTech]

00 FRC vette

05 LS6 with studs only...plus heads and cam.

Pro turbo top mount kit with precision 67mm turbos.

11.5psi

12 degrees of timing.

787rwhp and 696ft-lbs

Only thing i'm breaking is the drivetrain.

[MaxxMitchell]

- TC78
- 10lbs/490rwhp
- ~60,000 miles on engine before swap
- ~2300 heavy foot miles now boosted

The engine is a 03 5.3 backed with a 4l80.

[jason02Z]

vic. intake,arp botls,317 heads push rods and springs everything eles stock
pt70
4-12psi with ams-500 93 oct. somtimes 5gals mixed 104
460-500rwhp
5000+ miles driving to the track for street nights and quick street races.
3420lbs it still runs good just broke the converter/tranny

[Mr.Big]

Stock LS2 bottom end + ECS blower cam...
other mods in sig...
Raced at standing Mile events...
P1SC ---- 12psi --- 787rwhp 662rwtq ----- 2000mi ------ 32,000mi ------ N