L98 TPI gasoline?
08-05-2011, 11:45 PM
#1
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Car: 91 Camaro Z28
Engine: 5.7L
Transmission: 700R4
L98 TPI gasoline?
My engine is a L98 TPI recently rebuild. Just wondering what gasoline i should run in it? Ethenol free? 87? 89? 91? or 93? any suggestions or opinions?
08-06-2011, 01:20 AM
#2
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Re: L98 TPI gasoline?
93 if you have access to it. If not 91. Over 93 probably will not do much unless its a race motor. The factory even recommended premium on these cars. 93 is listed in my owners manual. You can run cheap stuff but expect reduced performance.
08-06-2011, 01:23 AM
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Car: 91 Camaro Z28
Engine: 5.7L
Transmission: 700R4
Re: L98 TPI gasoline?
I have access to 93. I just didnt think i needed it. also its quite expensive. but i guess if its in the manual. lol
08-06-2011, 03:59 AM
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Car: 86 Iroc + 83 Firebird
Engine: Iroc 305 TPI, Firebird 305 4bbl
Transmission: 700r4 in both.
Axle/Gears: Iroc 3.27 Firebird 3.23
Re: L98 TPI gasoline?
yeah, i have access to 93 as well, it is a bit pricey, regular works if you're tight on money, my tpi loves going through 93 though
08-06-2011, 05:34 PM
#6
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Re: L98 TPI gasoline?
Here in AZ 91 is all we have access to. In NM 90 is the highest you can get. I can only run 91 since that's all I can get. It's runs ok on it but my car ran a tenth quicker in the 1/4 with the 93.
08-07-2011, 04:05 PM
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Car: 89 RS, 92 Z28
Engine: 305 TBI, 350 TPI
Transmission: 700R4 Both Cars
Axle/Gears: 3.23 Posi.. 4 wheel disc both cars
Re: L98 TPI gasoline?
Mine does not like the cheap stuff, runs happy on 93......350 TPI with a few bolt ons..
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08-07-2011, 04:15 PM
#8
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Car: 1986 Vett, 2001 Expedition
Engine: 383SBC 435 H/P, 500 TQ
Transmission: 700R4
Axle/Gears: 307
Re: L98 TPI gasoline?
Look at it this way whats the price diffrence between reg and super .10 cents you pump 20 gallons thats a whole $2.00 more per tank think about it.
My Vett takes Super my Land rover takes super $2.00 more bucks to fill it per tank not going to break you it is get a Prius.
My Vett takes Super my Land rover takes super $2.00 more bucks to fill it per tank not going to break you it is get a Prius.
08-11-2011, 12:21 PM
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Car: 92Z28
Engine: 350 Stock Runnered TPI
Transmission: Auto
Axle/Gears: 3.73
Re: L98 TPI gasoline?
Mine runs good on 91 octane and I have steel shim head gaskets which are .015" thick my compression ratio is 10.5/1 with iron heads (stock ported L98).
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