Ri5e

Highly tuned of course. This guy I talked to, has a sleeved block by GE with pistons and rods running 1 BAR of boost right now. However, he told me hes gonna run 25 PSI soon on pump gas?? I told him that its not possible but he said its possible.

rOby

it probably is but i dont wanna stand near and find out

Anubyss

I was under the impression around 15psi is the limit for pump gas. I am assuming this would be 93 octane. Is this about right or could it go a bit higher?

boosted hybrid

What does this guy have like 6:1 comp? It could be possible if you took out basically all of your timing, ran it super rich and pray'd alot.

falcongsr

8:1 compression and 93 octane you might get away with 20psi and dead nuts on tuning. but i am not an expert. just extrapolating.

Ri5e

Here are pics of his car, looks so damn sweet, makes me wanna get a bodykit

The_Head

it reminds me of butterscotch pudding.

mmmmm yummy.


I think I heard somewhere the max power you could put down with 91 octane was 400 whp... I dunno, I would like a clear answer myself.

SiRkid

let him try....then come back to us with a FULL written(with pictures) report!

TenaciousC

why the hell would he completely build his motor and run 25 psi and then wanna run pump gas?

dmotoguy

because some people drive their cars on the street and $10 a gallon doesnt work too well

st00pid

We are running 20 psi on a stock LS engine and 93 octane, and we are making a whopping 300whp. He may drop the hell out of the CR or just run a small turbo. he might even weld up his intake ports to the size of dimes and run 50 psi.

Boost is a measure of restriction not horsepower or potential.

tuning plays a major role in the scheme also.


jason

VaporTrail

boost does not equal airflow.

Compression plays a huge part in this, and of course, tuning. That should be your determining factor.

CivicGSRTurbo

I made 461 at 17psi with pump gas so it is that far fetched(101 octane) from sonoco

rjardy

dude that is impresive, i think a list of mods would be in order.

Rob

DSF

Lucky bum. The Sunoco near me only carries 98

Liltrix

Guys lets look at the big picture here, why would anyone spend that kind of money on a built motor then try to blow it up?
It is definately not too safe to run that kind of boost pressure on pump gas.
Especially now its summer time!

Mike@Altered

After talking to many customers over the past few years, I know there is a good number of people out there with an assumption that a built motor is indestructable.

However, a built motor is just the opposite. A sleved motor with stronger rods and good forged pistons like the JE's can and, if properly built, will have more potential of making/holding more power when equiped with proper modifications (ie. fuel system, larger turbo, etc..). But without proper tuning and proper fuel (octane) the built motor is only marginally better at holding together under abuse.

So... It would be pretty foolish to run 25psi on pump gas (I'm assuming he means 91-93octane). The only way I could imagine making the motor last more than a few passes would be to retard the timing and run the car pig rich - and tuned like that he'd probalby make less horsepower than he currently has at 15psi!

Hope this helps,

ninesecrx

I made 89 hp in my all motor 87 carb. civic on 87 octaine...so yeah, he can boost 25 pounds and run pump gas.

bruthaboost

Has this person considered alcohol injection?

flip1199

is this 25 psi at the track, or daily driven?? I might see a reason to do 25 at the track with "RACE GAS" but not pump. Also if he wants to drive around on the street at 25 psi that is about the dumbest thing i have heard in a while. first off his tires will probable be spinnin like no tomorrow, and second; that's just a bunch of pointless speeding endangering the lives of many.
just my 2 cents

falcongsr

was that at the wheels?

Urban Business

thank you. run as much as you want, just dont detonate, pop a gasket or bend a rod

mntdewred

this then raises the question (at least for me) as how much psi you can run on pump gas, say 93 octane?

VaporTrail

as said previously in this thread, it depends on compression level, and tune quality.

Smashback

14.56783201 PSI at sea level