Max pump gas HP
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Max pump gas HP OK, quick question. I need to decide if I am buying race gas or not this week for my final race tune coming next Tuesday. I did some searching but really couldn't find an answer.
Most of you guys have seen my build on the S10. Dual 044 pumps, 80lb Deka injectors and Meth injection if needed. A2W IC. S482 on a SBE 370". I would like to see 900-950 rwhp but may not get close enough on pump gas. We have 93 octane here for super.
I am going to get C-114 if I get the race gas, but its about 16.50 per gallon. And I had to drop 2k on my trany this week which wasn't planned. Just trying to see what is possible and figure if I can be competitive in a race coming next month.
Most of you guys have seen my build on the S10. Dual 044 pumps, 80lb Deka injectors and Meth injection if needed. A2W IC. S482 on a SBE 370". I would like to see 900-950 rwhp but may not get close enough on pump gas. We have 93 octane here for super.
I am going to get C-114 if I get the race gas, but its about 16.50 per gallon. And I had to drop 2k on my trany this week which wasn't planned. Just trying to see what is possible and figure if I can be competitive in a race coming next month.
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From: San Marcos, Tx
https://ls1tech.com/forums/forced-in...de-9-rear.html
It has Mahle Pistons but gen4 rods and stock crank in a 6.0 LQ4. I'm worried about the rods mainly.
I am sure its been talked about in one of my threads but I cant seem to find it. I just wanted to ask since I am short on time. I need to get a drum fuel by Friday if I need it.
It has Mahle Pistons but gen4 rods and stock crank in a 6.0 LQ4. I'm worried about the rods mainly.
I am sure its been talked about in one of my threads but I cant seem to find it. I just wanted to ask since I am short on time. I need to get a drum fuel by Friday if I need it.
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I know they say the 80lb injectors are good to 1000hp, on paper anyway. I'm just looking for real world info. I also understand your comment as I'm not new to race engines. I am new to turbos and EFI though. So based on the info in my build thread, I'm looking for info if I can get it.
Last edited by Taxman20; Apr 12, 2017 at 09:21 PM.
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Yea I am sure. I planned on using it even with the race gas. With race gas I am shooting for max 950rwhp as I have seen a few bend rods at about 975 or above. So I am curious if the 93 gas can maybe get close to 900. I've never run a race motor on pump gas.
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From: Norn Iron
Absolutely no difficult making 1000hp on pump gas if the build and tuning are right. Meth can make that a bit easier.
For most part it's going to boil down to whatever compression ratio you choose.
For most part it's going to boil down to whatever compression ratio you choose.
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if your race tune is going to get higher than about 14 lbs boost and timing in the 14*area then yes you will need better fuel. but you can get away with more on a dyno than at the track .as the load is not the same as shifting and droping rpm and the pulls are shorter.
if you pull timing in the lower rpm full boost range and don't let it go lean you will get decent numbers but if you push it and it rattles hard it will pop a gasket or break a ring land.
deka 80s will go a long ways on gas .I don't think a 1000 is out of reach at all.i don't know the hp numbers but my friends Camaro that I tune has ran 9.44 at 3600 lbs with 80s on e85 @ 97% d.c. 58 psi base and 1 to 1 rising regulator.
if you pull timing in the lower rpm full boost range and don't let it go lean you will get decent numbers but if you push it and it rattles hard it will pop a gasket or break a ring land.
deka 80s will go a long ways on gas .I don't think a 1000 is out of reach at all.i don't know the hp numbers but my friends Camaro that I tune has ran 9.44 at 3600 lbs with 80s on e85 @ 97% d.c. 58 psi base and 1 to 1 rising regulator.
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I know the dyno isnt the same as real world track running. Its just to get things setup with a good baseline. The FPR is a 1 to 1 rise. Right now its at a lower base because its not been needed to be higher. In our first street drive tuning last weekend we datalogged it and ran 14.5psi on 1 fuel pump. Water only in the IC. Ran up to about 5900 rpm. Max TPS was 78% .
I then made one last pull after setting things up and tested the AFR safety and it worked. Shut the engine down and came back as it should.
My base compression is about 9to1.
My question really wasnt to ask how much can my engine make. Its really just asking if the gas itself is capable on an engine like mine. I know there a lot of factors. But if the opinion is 700whp then I am getting the race fuel. If its 900 I might see what I can end up with.
I then made one last pull after setting things up and tested the AFR safety and it worked. Shut the engine down and came back as it should.
My base compression is about 9to1.
My question really wasnt to ask how much can my engine make. Its really just asking if the gas itself is capable on an engine like mine. I know there a lot of factors. But if the opinion is 700whp then I am getting the race fuel. If its 900 I might see what I can end up with.
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From: Norn Iron
If you can only make 700hp with a turbo build like that, something is seriously fucked up.
The turbo to a large degree will be a limiting factor as much as anything else.
But pump gas+meth the engine itself will have no difficulty making 4 figures as long as it has the supporting parts to do so. Your compression is sensible, so I wouldnt even see an issue hitting 900 on pump alone with good tuning as long as your turbo will support it at say 20-25psi, no more.
The turbo to a large degree will be a limiting factor as much as anything else.
But pump gas+meth the engine itself will have no difficulty making 4 figures as long as it has the supporting parts to do so. Your compression is sensible, so I wouldnt even see an issue hitting 900 on pump alone with good tuning as long as your turbo will support it at say 20-25psi, no more.
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Yea, the turbo will surely make the power I need. And I have a few opinions on this already. From yes it will no problem, to yes it might but its super dangerous. I didn't want to push more than 20psi anyway with race gas. I'm wanting a "safe" race tune. So one that isn't putting the engine into the red zone of strength on each pass. I would like it to live a little while.
I am most likely going to get the race gas and be done with it.
I am most likely going to get the race gas and be done with it.
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I'm making >900whp with 91 pump gas and dual methanol on a D1 427ci setup very reliably for awhile now at both 1/2 mile pulls and on the street. zero issues. I'd say just don't put too much timing in it and you'd be fine.
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Injector calculators show 80 to 100lbs per cyl for 1200 chp (at 90% DC). With IAT <120F and 50/50 you should be close to goal on 93. The key will be to sneak up on it with a box of plugs to swap in #7. Give it what it wants. Don't get greedy and note when power starts dropping off as you turn it up.
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Thanks for the info. Why does the #7 plug have issues? I am running a Victor Jr intake so the entry is in the center of the intake and not having to come through the front of a front entry intake and have to make it to the rear. I am assuming that would be the issue with it.
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You may see the rear cylinders hotter than others (not necessarily leaner). When you get fuel set and and timing close you'll want to put a fresh set of plugs in and do a pull then read them all as a baseline. If you see a hotter location you can focus on those plugs as you make changes, reading fresh plugs to stay safe.
I live on the other side of the debate. A few gallons of race fuel is cheap cheap cheap insurance vs damage that can be caused by many different variables. It's worth it just for the worry,check this,check that factor. Race fuel is produced for a reason. Good luck !
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I agree. But just to be very clear here I am not asking for the maximum power from pump gas. What I am asking is what the opinion is of max horsepower that could be made safely. I am aware that while I can possibly make 800 to the tire on pump gas fairly easily that I'm not trying to push pump gas to the absolute maximum. I want to do this safely. The reason for my question was that if I could only make 800 to the tire on pump gas then I'm not going to mess with it. I'm going to buy the race gas and shoot for my 900 to 950. To be able to compete in the no prep true Street class I'm going to have to make 9 to 9:50 or more at the tires. I know on race gas my limiting factor for my max horsepower is going to be the rods and not the fuel. So I'll be safe running race gas. Because the race gas will allow me more power than the stock block can handle.