Limitations of pump gas - highest HP on pump gas

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Jul 28, 2006 | 02:58 PM

#41

stevieturbo

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From: Norn Iron

Quote:

Originally Posted by chuntington101

hey stevieturbo, how you doing mate?? not seen you on here before! normally on the old gassing station!

anyway just wanted to ask, whats you are like to drive on our sh!tty roads??? what transmition are you running???

thanks Chris.

I'm a regular here, probably the best source of LS1 info around.

Stock T56 until it breaks, and the car drives fine. Its a little noisy due to the rose jointed 4-link setup, but apart from that its great !

Jul 29, 2006 | 12:56 PM

#42

chuntington101

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is it driveable on the road ok then? do you ever take it to track days? how about noise regs?

did you old set up (cossy lump right??) feature in fast ford? be nice to see what they would say about your setup now!

Chris.

Jul 29, 2006 | 02:55 PM

#43

CALL911

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From: IN

My LT1 has the stock PCM, pump gas, with no Methanol injection and I did 590 on a Mustang dyno on a hot day, so easily over 600 RWHP on a dynojet on a cooler day.

If I had a FAST system, or ran methanol injection, I could easily do more. I just wanted something I don't have to mess with further and can still fill up at the pump with as before.

Jul 29, 2006 | 03:10 PM

#44

JustinOlson

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Supra 3.4L stroker with GT47-88, no nos, 43psi on VP import fuel:

Jul 29, 2006 | 03:38 PM

#45

Pro Stock John

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From: Chicago, IL

Nice but VP Import is like 120 octane.

Jul 29, 2006 | 03:49 PM

#46

GrahamHill

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From: northeast Miss.

Looks like a skateboard ramp?!

What would a Supra run with almost 1400hp?

Jul 29, 2006 | 04:00 PM

#47

BoostMluse

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Quote:

Originally Posted by GrahamHill

Looks like a skateboard ramp?!

What would a Supra run with almost 1400hp?

8.60's @ 170+ with the stock 6 speed and stock IRS. The auto cars run in the 7's.

Jul 31, 2006 | 04:29 PM

#48

Tirefire

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From: El Paso, Tx

I'm currently running 91 octane, I have 526 rwhp and 510 rwtq through a mustang dyno with an afr of 12.9 and have been wondering if I can expect a long life out of my ls1 engine???? or will the low octane contribute to an early death??

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Jul 31, 2006 | 04:35 PM

#49

ABeasst

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From: North Carolina

I wouldnt run a supercharged engine @ 12.9 A/F but some people do it without problems just requires a LOT of monitoring and tweaking of the tune based on the weather.

Jul 31, 2006 | 04:38 PM

#50

Tirefire

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From: El Paso, Tx

What seems to be the problem with 12.9 ABeasst? I ask beacuse the weather here in El Paso, Tx gets really hot sometimes and can change with a blink of an eye..

Jul 31, 2006 | 04:40 PM

#51

280Z28

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From: Austin, TEXAS > *

Quote:

Originally Posted by Tirefire

What's your timing? I run 16* with 93 octane and 12.5afr.

19* was the first that showed KR on the dyno, and it was a hot day. I feel pretty comfortable at 16.

BTW, at 16*, I made 513rwhp/460tq. You're above me in power, under me in octane, and a tad leaner. I'd keep a close eye on it for KR :Ohnoes:

Jul 31, 2006 | 04:42 PM

#52

Tirefire

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From: El Paso, Tx

Sorry guys don't know what I was saying/thinking it was actually 11.9 afr. I had to go back and look at my dyno sheet. Sorry again...

Jul 31, 2006 | 04:45 PM

#53

ABeasst

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From: North Carolina

oh well then I wouldnt worry about it. The reason I said I wouldnt run a S/C engine at 12.9 is b/c if the weather changes you would end up having spark knock which will kill your engine.

Jul 31, 2006 | 04:52 PM

#54

280Z28

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From: Austin, TEXAS > *

Quote:

Originally Posted by ABeasst

oh well then I wouldnt worry about it. The reason I said I wouldnt run a S/C engine at 12.9 is b/c if the weather changes you would end up having spark knock which will kill your engine.

If you're tune is good, weather changes are handled fine.

I'm sure you know that, I just don't want people thinking that weather changes are a reason to be worried about their FI setup... they just need to know how to be prepared and everything is good.

Jul 31, 2006 | 04:56 PM

#55

ABeasst

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From: North Carolina

thats why I said in my previous post you need to monitor and tweak a lot to be safe

Jul 31, 2006 | 06:21 PM

#56

Slowhawk

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From: Bridgewater,Ma

Quote:

Originally Posted by JustinOlson

Supra 3.4L stroker with GT47-88, no nos, 43psi on VP import fuel:

That is nice for a Supra but absolutely useless to me or any LS1 powered vehicle we do.Has a power range of 1krpm

.

Now back on topic. Most people are happy with 500-600rwhp due to the lack of problems they would have with the setup.When pushing the power up,broken parts,unreliability starts to set in.

Jul 31, 2006 | 06:36 PM

#57

Bryan Wilkinson

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From: Charlotte, NC

Quote:

Originally Posted by turimo1

I know that horsepower is not the single factor in determining what octane you run, but I curious to know from the force fed guys what kinda of Hp/tq numbers everyone is putting down with pump gas 91-93 octane. i am trying to find out if you can safely run 600 rwhp on pump gas, with 10.1 comp, 10-12lbs boost.

The car made 822RWHP on 93 OCT at 14PSi. I had not had any problems until I took it to 18psi and it went boom. Compression was 10:1.

It should be noted that it was a $30,000 engine. Not your everyday run of the mill. I know everyone calls BS, but what are you going to do.