whats the highest boost anyone has run on stock internals?
just to start i've only ran 9psi
i'm afraid to go any higher!!!!!!

 

Before you, 8psi. Congratulations, you are a pioneer.

 

i ran 10 psi on a stock gsr motor with a FMU and no problems i was running a V-AFC 310cc RC's and a 255 intank and a walboro 150+ psi 255 inline also with open dp sounded mean

 

(Death to morons!!!! Darwin is coming for you!!!!!!)>i love it
i was at 7 but i don't drive it every day
she's a trailer queen
its been raced 4 to 5 times
its more show than go

 

I'd run it at or lower than 8...no reason to blow the motor on a show car.

 

i'm runnin an IHI RHB5 with internal wastegate i was pondering a different manifold with external w/g any pro's or cons

 

It depends on what engine you are using. If you are running a B-series engine I think you could get away with 12-15 psi on stock internals IF, and it is a Big IF, you stay out detonation. So great tuning is a must. Also you should not exceed the stock redline. If the connecting rods have a stiff enough beam, as I believe B-series rod do, Turbocharging is not any harder on the rod than an NA engine at the same engine speeds. The stress on the rod increases more with engine speed than it does with higher cylinder pressures. Pistons, rings, and bearings are most sensitive to detonation.

If you are running a D16 engine I would not exceed 8 psi or the stock redline. The beams of the stock D16 rods are not stiff enough and do not tolerate higher boost pressures. I have seen two different engines have rod failures in the beam of the rod at higer than 8 psi boost pressures. I think the rod yields in bending, develops a crack, and fails in very few cycles.

Even if you did not want to go to the trouble of sleeving the block, good aftermarket market rods and pistons are cheap insurance. Having the confidence that you are not going to have an expensive catastrophic engine failure if you lean on your engine when you are tempted will make your car much more fun. I will not even build a non-stock engine of any kind with stock recipricating components

 

6psi 30 days. 8psi 30 days. 10psi 30 days. 8500 boosted miles. 10.5-11.0 afr...never heard any detonation.

 

9 psi on a b18a sounds fair anymore and u risk it on an old engine

 

17 psi no problems change oil pump gear though.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by saso &raquo;</TD></TR><TR><TD CLASS="quote">17 psi no problems change oil pump gear though.</TD></TR></TABLE>

you will be owned soon

 

i ran 12psi on a stock d16y8. 12:1 FMU and stock injectors and a 255 lph fuel pump, i dont want to hear about bending rods, the only thing u have to worry about is headgaskets blowing(too much pressure) and rod bearings. it ran fine, til i turned it up to 14psi and raced a Vortec Supercharged GSR (10psi) (278hp /wheels) and blew it up during a 3rd gear pull

 

A friend of mine is running 17lbs. on a stock B18C1. But he also has (pressure washers) for injectors. But your point is very well put. The higher the boost, the faster detonation will kill the motor. TUNING IS THE KEY!!!

 

we ran 20 psi on a stock LS engine for over a year. The engine is still running.

 

Hey stoopid can you give more details on that setup. Ive seen ti before, but too lazy to search Dyno, times, components,ect...

 

any ideas for the f23? I was thinking on sticking with 8psi, but would like to run more if possible.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MiraiZ &raquo;</TD></TR><TR><TD CLASS="quote">

you will be owned soon </TD></TR></TABLE>

Nope, good tunning owns me

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by st00pid &raquo;</TD></TR><TR><TD CLASS="quote">we ran 20 psi on a stock LS engine for over a year. The engine is still running.</TD></TR></TABLE>

I aggree...we ran 22psi on stock internals for the entire summer last year on a gsr...all we did was the fuel...hondata s200b, holley 255lph intake, 345cc prelude injectors, 12:1 vortech fmu, competition fuel rail and just a block guard...we never detonated...hahaha...after that we parked the baby to work on a sr20 then we will rebuild the ls for higher boost...so yes you can go really high on boost at stock internals with proper tunning...just be careful and listen for detonation. yuo can check http://www.inlinepro.com they have a stock gsr with a block guard doing 550+whp

 

i have to check that out for myself and look into it ^^^

 

it's all in tuning ...9 - 10 psi 263.8 whp...on stock block and stock internals
http://www.tunedbylorange.com/263whp.mpg

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbob18a1 &raquo;</TD></TR><TR><TD CLASS="quote">(Death to morons!!!! Darwin is coming for you!!!!!!)&gt;i love it
i was at 7 but i don't drive it every day
she's a trailer queen
its been raced 4 to 5 times
its more show than go</TD></TR></TABLE>

is that a joke?

you trailer a car that only runs 8 psi?
You don't race it, yet you build it?

Why?

 

The highest i've run was 10 and that was an accident i am afraid to go much over 8 on stock internals with and fmu holley 255 rc 310 setup.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tofurky &raquo;</TD></TR><TR><TD CLASS="quote">

is that a joke?

you trailer a car that only runs 8 psi?
You don't race it, yet you build it?

Why?</TD></TR></TABLE>

I believe he said it was a show car.

 

nice


i might be going back to boost i think i have made my mind up

and it is a little bit safer then the bottle also less meltdowns

 

15psi on a B16 for 20 minutes.
20psi on a B20 for a 3rd gear pull.