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#1 | |
Stock
Join Date: Dec 2007
Location: fullerton
Posts: 10
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*86.5 N/A *Fully Rebuilt Engine *Port Polished Head *Painted Wheels ![]() MODS TO DO NEXT: (in order) -Eibach Lowering Springs -Tokico Struts -Sway Bars -Headers -3 in. Piping -Cold Air Intake -Wheels |
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#2 | |
12psi boost
Join Date: Sep 2005
Location: Troy, NY 12180
Posts: 353
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High octane is needed in supercharged cars, and very high compression motors because forced induction and high compression ratio engines are more likely to have detonation problems. |
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#3 |
1000whp postwhore
Join Date: Jun 2005
Location: Mojave Desert, Calif.
Posts: 1,705
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^^^ This is true. But...7mge has 9.2 compression. You can run regular 87 octane under normal conditions, when the outside air temp is below 100*. The knock sensor will let the computer know if your getting any pinging, and it will back down the timing to stop the pinging, which is HP loss.
I've never heard it pinging, no matter what fuel I use. In the summer it gets over 100* here most days. My a/c is on, day and nite, so I run 89 octane to keep the pinging away, and my timing advanced, thus keeping my HPs up. I can tell the power difference between 87 and 89. Can't tell any between 89 and 91, so I must not be getting any timing retard with the 89. BTW...I run my timing at 15*.
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Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08. |
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#4 |
3" Exhaust
Join Date: Oct 2005
Location: San Diego, CA
Posts: 238
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Someone should sticky this.
![]() I disagree about the earlier statement about cams. From what I've gathered, the cams in the 7M are robust enough, in both the NA and the Turbo motors, to support high HP. Besides maintenance issues, this is where I would search for "inexpensive" HP in an NA: 1) Intake 2) Exhaust 3) Header 4) Ignition 5) Fuel 6) Electric Fan 7) Flywheel 8) Underdrive Pulleys 9) Ceramic Coatings * 50-80 Shot Dry Nitrous setup This is for going all out: 1) Headwork 2) Cylinder Overbore 3) Rod/Piston Upgrade & Compression Bump 4) Tuning * 90+ Shot Wet Nitrous setup
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Function Over Form - Form Follows Function 88 MkIII Jurbo |
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#5 | |
500whp yet?
Join Date: Nov 2005
Location: Long branch, NJ
Posts: 1,006
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True, But i know wit my friends camaro, tpi and running 10:1 pistons, on regular gas you never hear a ping or knock or anything, it runs beautiful. its just because the knock sensors and computer are fast/good enough to prevent it. but like you said there is power loss...so it does help to run higher octane if your compression is higher than about 9:1. But my point is (to others) that just because you dont hear the pinging, doesnt mean its not retarding the timing.
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Yay the supra assistant is gone!!! WEEE!! Last edited by Isphius; 02-04-2006 at 07:50 PM. |
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#6 | |
Stock
Join Date: Jul 2009
Location: B.C, Canada
Posts: 9
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#7 |
Stock
Join Date: Oct 2005
Posts: 9
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Ya ill probably have to just start out with some of those things that you guys suggested but like i said right now im broke. mostly because of the fact that i just spent all my money on that car and because im only 16.
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#8 |
Stock
Join Date: Jun 2009
Location: Atlanta
Posts: 15
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your gonna be even more broke if you have to pay the insurance. haha.
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#9 |
Stock
Join Date: Jul 2009
Location: Misawa-shi, Aomori-Ken Japan
Posts: 4
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does anyone know a good place to pick up a MSD system and a writeup on how to wire one into a 1988 GA70 supra with a 1g-gte engine.
thanks |
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#10 |
3" Exhaust
Join Date: Feb 2005
Posts: 131
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get a lexus afm
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