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Alpha for president
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Discussion Starter #1 (Edited)
Next week seems to be that time i'm going to have the car tuned....I'm just double checking with people to see what a safe psi I can go to with pump....this is what i have.....76gts, 1000cc, AEM, hks 264's bl 4' turbo back, the motor also is built je pistons, carillo rods... other then the cams the head is stock...i'm pretty sure 15 or 16 psi is a safe # but just wanted to check....I like to play it safe with timing too..thanks
 

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1994 Toyota Supra Turbo 6spd
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i have the exact same set up pretty much except stockmotor/head (264 jun cams) 76s turbo 6spd.

i set my 91 octane pump gas boost at 18psi. that is probably a bit high and my peak torque (peak boost) timing is set at around 13-14 degrees.
i'll have knock control and monitor knock but hopefully 18psi with 91 will be okay fort he timing i'm running.

at 19psi and 100 octane i was able to hit around 630-640whp so i'm pretty sure high 500-600low is possible at 16-18psi.
 

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Alpha for president
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Discussion Starter #4
those are good #'s....pump here in NY is 93...which i'm sure isn't that much different then 91...
 

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1994 Toyota Supra Turbo 6spd
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i think with the lowered timing probably a good 4- 5 degrees from 100 octane to 91 or your case 93.. your car should put out around high 500's

i have the 17psi tune in my car right n ow at 91 octane and it feels wayyy slower than the 19-20 psi with 100 octane!! timing is 3-4 degrees lower too
 

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2-3 degs makes a big difference on a Supra. I would say it depends on the setup, AIT (FMIC). For a 76gts, good FMIC, and all the supporting mods, at 18psi I would start around 11-12deg at peak torque and work from there. If your FMIC isn't adequate, and the AIT climbs alot on the 1-4 gear pulls, pull some timeing out on the AIT vs ign table.
 

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Alpha for president
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Discussion Starter #7
I have a 3 row for now
 

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I spin a 74mm
272 cams
4 row
850cc injectors
th400 unlocked converter

PUMP:
15psi 16 deg 11.2:1 a/f 122mph 1/4 trap speeds

METH+PUMP:
25psi 14-15deg 10.80 a/f 132mph 1/4 trap speeds

METH+PUMP+RACE:
30+psi 14deg 11.60 a/f xxxmph 1/4 trap speeds
HOld on for your life though feels scary fast on the street
 
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