Jake99

iTrader: (2)

I got a 71 nova, lq4 engine all stock other then ls9 gaskets, 224/224 112 cam, ls6 intake, has a gt45 76/77 turbo. Cr should be around 9.4. I ran the car in about 5k da, 85 degrees outside, ait stays at or below 130. It went 1.62 short time, 10.81@124 on 10psi of boost and 17ish degrees of timing, this is through a ptc converter, 4l80e, 3.08 gear, 3610 lbs. Now according to those number its around 530 to 540 rwhp real world, so maybe a little higher on a sae corrected dyno.
Question is how much harder do you all think I could push this thing on straight 91 fuel? Thought of maybe trying 13psi on like 15 degrees, but im sure the iat's will come up a little too right away.
Curious to see how far some of you have gone with pump fuel (and not blown it up) I do not want to hurt the engine just to try and run a number, I just want it to run the best it can

yenkomike

iTrader: (2)

never ran mine past 11 psi and 12 degrees timing. run 10.50 there. went e85 and never looked back.

3 window

iTrader: (1)

No idea on the fuel, but that thing runs well IMO at that altitude and tune. Nice work. Plus, if it's a Nova, we need to see it! Lol

truckdoug

iTrader: (26)

When I push my timing out to 15* on pump the timing mark gets really low on the strap and it doesn't seem any stronger. I'm running 11* at peak torque area and 14* up top.

The BallSS

iTrader: (9)

I'm at 12 lbs. w/ a T7875 but I'm also at sea level for the most part.
I don't know what the timing is at and now that I think about it I've never pulled a plug either lol.
Some guys in here seem to think you can go a lot higher on pump only, I was recommended by my tuner not to go much higher than 12 lbs. on straight pump only.

Jake99

iTrader: (2)

http://i58.photobucket.com/albums/g2...pssng0ioxh.jpg

http://i58.photobucket.com/albums/g2...sdkrixtmw.jpeg

http://i58.photobucket.com/albums/g2...psek35oetq.jpg

Jake99

iTrader: (2)

Yeah, it seem's to me that it's getting close to the edge, I am running a br7ef plug in it so that should help. I think im going to try 12psi once it cools down a bit. I put a 28in slick on the back to race it, im going to try and get a little tire up front and up the 2 step a little more, this was leaving on 2.5psi of boost at 2700 rpm. Id like to see if I get it running 10.50 on pump fuel. I drove the car 2.5 hours up there, raced it, and drove it home. Avg 16.8 mpg with the racing lol

denmah

iTrader: (2)

is "far as itll go safely" a ******** answer, every setup is different

Jake99

iTrader: (2)

Not if it's right lol, ill just have to work on the car to get the et down, I think I get can 10.50s with this power. I made 806rw with this same combo in a friend pickup, that was just e85 and 20psi, so if I want more ill just go that way, this is still on the factory tank and 5/16 fuel line, 255 pump and vett filter..

3 window

iTrader: (1)

Can't see the pics.

AnotherWs6

iTrader: (17)

To the max buddy. To the ****** max.

Jake99

iTrader: (2)

Does this link work? Im not to good with this stuff, my photo bucket updated and don't give the option I use to use.

3 window

iTrader: (1)

There's no link.

3 window

iTrader: (1)

never mind. Opened the other three links and was able to see it. Nice job.

1bdbrd

iTrader: (12)

I have wondered how far you can push ethanol free 91 compared to the 10% variety. I would assume up to a certain point no ethanol is better than some ethanol.

truckdoug

iTrader: (26)

i grab e10 or ethanol free depending on which gas station i'm closest to and they both seem to run about the same

pdxmotorhead

I believe we are supposed to shift across the board to E15 aren't we?
Wasn't that in one of the Obama bills?

Jake99

iTrader: (2)

Problem is e10 91 is pretty much 87 with a little ethanol in it, without the octane being any higher I dout it would help any. You could probably tune it too 11.0af on 91 then put a gallon or two of e85 on top of the 91 which would get you better fuel and lean you up to 11.5af, but I feel like if im going through the hassle of that I might aswell run straight e85. But then id need to put a cage in it and trailer it.

AnotherWs6

iTrader: (17)

I sure **** hope not. All we have up here is e10 and the stuff sucks. And for small engines over the winter? OMG. Weedwacker, lawn mower, blower..... I've cleaned and replaced quite a few carbs over the years.

truckdoug

iTrader: (26)

yeah it makes the little motors run like ****. i pay the extra 1.50/gal for non ethanol in those.