gas? lt1
TECH Enthusiast
Joined: Sep 2004
Posts: 595
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From: Clarksville,Tn
It's all in how you drive it, if yer ***** to the wall all the time run premium, if you mostly cruise or do interstate driving you should be able to run just fine on 87. It all depends on what load the engine is under, under part throttle cruising there ain't much happening in the cylinder. This is pretty much just common sense stuff.
I'm considering converting mine to run on 100% E85.
I'm considering converting mine to run on 100% E85.
Teching In
Joined: Sep 2006
Posts: 6
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Originally Posted by RedRocketZ28
I think 96capricemgr pretty much covered everything. Some of you need to listen to him.
Originally Posted by proflt1
he's talking about older LT1s with iron heads, and they can run whatever they want because of the lower compression. with the f-bodies tho, especially 96's and '97's, they have higher compression and need high octane for proper engine performance. yes, they CAN run on anything but are you that poor to put in premium??? half the stuff 96capricemgr doesn't apply to this thread, so his statements are basically invalid all-together. he seems to be pretty stubborn too, so he'll probably reply with a corresponding arguement, repeating himself with useless information again and again as he's done before..
You are an IDIOT too.
I am talking about the 94-96 b-body LT1 how is that an older LT1 same exact bottomend as the LT1 f-body, and you show me ONE SINGLE SCRAP of evidence to support this 96-7 higher compression stupidity some of you are pushing. I already repeatedly covered why the .4 extra compression of the aluminum heads motors should not make it require premium. GM tuned it that way and you can undo that with simple reprogramming.
How about we go at this another way if some of you are so frigging increadibly intelligent how is it that a 10.4:1 motor requires 91 octane as you say, but my 11.5:1 motor gets by on 93 octane wonderfully.
You are claiming that despite the iron heads 10:1 spec with 87 octane the .4 increase tthe aluminum head motor got requires 91 that is a ratio of increase of one tenth of a point compression to one point octane requirement, by your logic I need like 102 octane in my current setup how is it I am able to get trhe results I am on 93 then??????
To those of you on the fence here notice every DIRECT question asking them to refute my stand fact for fact is ignored, that is very telling, those arguing with me are wrong and can not support their argument.
Originally Posted by proflt1
he's talking about older LT1s with iron heads, and they can run whatever they want because of the lower compression. with the f-bodies tho, especially 96's and '97's, they have higher compression and need high octane for proper engine performance. yes, they CAN run on anything but are you that poor to put in premium??? half the stuff 96capricemgr doesn't apply to this thread, so his statements are basically invalid all-together. he seems to be pretty stubborn too, so he'll probably reply with a corresponding arguement, repeating himself with useless information again and again as he's done before..
LOL someone who doesnt read well
Mr.Camaro you can premium in that motor as long as you have a good tune from what I've read.
Some things to think about running pump gas on higher compression
-go to a colder plug
-160 stat
-fans on early
-healthy oil pressure to protect bearings
-propper quench aka very little
-smooth chambers and or coatings
-electric water pump
-more rear gear equals less load
-make 100% sure your getting air from outside the engine bay
-get a good in person dyno / STREET tune
Seriously I have tuned 13.5:1 LT1s with stick cars with little 3.23 or less rear gears.
11.5:1 Cali 91 pump gas LT-1s, is an everyday event for me here at Race-Prep.
-160 stat
-fans on early
-healthy oil pressure to protect bearings
-propper quench aka very little
-smooth chambers and or coatings
-electric water pump
-more rear gear equals less load
-make 100% sure your getting air from outside the engine bay
-get a good in person dyno / STREET tune
Seriously I have tuned 13.5:1 LT1s with stick cars with little 3.23 or less rear gears.
11.5:1 Cali 91 pump gas LT-1s, is an everyday event for me here at Race-Prep.
Joined: Oct 2005
Posts: 1,419
Likes: 1
From: Holland Twp/Milford, New Jersey
Originally Posted by 96capricemgr
and you show me ONE SINGLE SCRAP of evidence to support this 96-7 higher compression stupidity some of you are pushing
Originally Posted by Gangly
96-97 LT1's were bumped up to 10.5:1 compression but im not sure how. Maybe different head gasket or something along those lines(Ill have to check part numbers), but anyways, thats just the specifications in the book.
Originally Posted by Aries
factory specs on the heads were changed slightly (combustion chambers had a bit more edge overlap)
https://ls1tech.com/forums/lt1-lt4-modifications/170957-basic-lt1-specifications.html
i'm not going to search for information you should already know. do your own homework. also, watch your language and don't harass any of the other members...
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Verdad Gallardo Joined: Oct 2005
Posts: 1,419
Likes: 1
From: Holland Twp/Milford, New Jersey
Originally Posted by 00transamnh
sdm stop being a passive agressive *****...
do it, buy an lt1 and run 87 in it, dont be scared. while your at it dont change the oil or rotate the tires either. and im sure you wont wash it. 
in it and ash on the floor. etc etc
in it and ash on the floor. etc etc 
Glad there are a few of you with enough of a brain to listen to my argument and see my point.
sdm1234, AGAIN I challenge you to refute my claims point for point.
You act like we are the ones in the wrong, you repeatedly tried to spread your ignorance and I would not tolerate it, I did this forum a favor.
Far as your claim of the 10.5 this forum alone is not proof I can find you as much bad info posted by folks like yourself as I can find good posted by the likes of GIZMO, Ed, Ellis, etc.
LT1MAN I dare you to go back and read my posts and try to refute them point for point too, you are yet another idiot and the only way the forum as a whole can grow is if idiots are called such and their input taken with a grain of salt.
sdm1234, AGAIN I challenge you to refute my claims point for point.
You act like we are the ones in the wrong, you repeatedly tried to spread your ignorance and I would not tolerate it, I did this forum a favor.
Far as your claim of the 10.5 this forum alone is not proof I can find you as much bad info posted by folks like yourself as I can find good posted by the likes of GIZMO, Ed, Ellis, etc.
LT1MAN I dare you to go back and read my posts and try to refute them point for point too, you are yet another idiot and the only way the forum as a whole can grow is if idiots are called such and their input taken with a grain of salt.
Teching In
Joined: Aug 2006
Posts: 19
Likes: 0
From what i've read after doing a google search it depends on what state you live in as to what the gas companys can get away with calling premium and super ,different states premium starts at lower or higher octane and so does super can be lower or higher octane .
Joined: Oct 2005
Posts: 1,419
Likes: 1
From: Holland Twp/Milford, New Jersey
you're CHALLENGING me, now? no, i'm not going to stoop to your level and play this game. i refuse to try and play "who's smarter" here. get off your high horse, mr. hotshot.
Originally Posted by sdm1234
you're CHALLENGING me, now? no, i'm not going to stoop to your level and play this game. i refuse to try and play "who's smarter" here. get off your high horse, mr. hotshot.
Joined: Oct 2005
Posts: 1,419
Likes: 1
From: Holland Twp/Milford, New Jersey
i've said enough, prior to your self-defense. i have nothing to prove to your or ahyone else here, and i'm certainly not going to go into Engine Mechanics 101 here. so, don't try and call me out with a little game of "Dare". if you really want me to back up all my claims and explain to you how everything works, please feel free to PM me or IM me or email me. i don't like hijacking threads like this, so redirect your protests elsewhere.
In otherwords I am right and you are IGNORANT and can not intelligently defend your statements. If I am wrong as you say would it not be better to give your points here to help the original poster see both sides arguments??????
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From: Farmington NH
Originally Posted by LT1MAN
do it, buy an lt1 and run 87 in it, dont be scared. while your at it dont change the oil or rotate the tires either. and im sure you wont wash it. in it and ash on the floor. etc etc
in it and ash on the floor. etc etc
we call em winter beaters up here
Teching In
Joined: Sep 2006
Posts: 6
Likes: 0
Originally Posted by 96capricemgr
In otherwords I am right and you are IGNORANT and can not intelligently defend your statements. If I am wrong as you say would it not be better to give your points here to help the original poster see both sides arguments??????
somebody lock this thread please so 96capricemgr discontinues the harassment.