Timing curve with 93 pump gas
Thread Starter
Staging Lane
Joined: Aug 2018
Posts: 57
Likes: 2
It's too hot for a street tune and pump gas IMO. You don't wan the heat into the 2nd thread at all and you don't want it into the bend. 1/4 to halfway down the strap is about perfect IMO. If you had super consistent RACE fuel in it, that's about a "perfect" max power heat range for a max effort setup. Is that a 7 plug? May get some resisted boots and try an 8 heat range as well. Or go the expensive route and run A TR8IX. (at about 9$ a plug though it's not a great route for tuning) I'd try 11* with the the BR7's and get another read. If it looks good swap out to the TR8IX's or run a resistor boot and the cheap "8" Heat range plug. I tune on the 7's with 1/8th mile pulls, then drop in the resisted 8 iridium plugs when done and do 1/4 pulls at the track.
Last edited by Forcefed86; May 26, 2020 at 12:43 PM.
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TECH Regular
Joined: Nov 2018
Posts: 467
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To give you some more perspective, I ran this weekend on the track (sprinkling rain unfortunately) and had mine at 12* @ 17psi on 90 octane with 40/60 meth/water and I had to pull it back to 10* to be safe once I was tuning on the track. 12* worked on the street but all it took was a little more tire hook than normal and all of a sudden it didn't like 12* anymore...
Thread Starter
Staging Lane
Joined: Aug 2018
Posts: 57
Likes: 2
To give you some more perspective, I ran this weekend on the track (sprinkling rain unfortunately) and had mine at 12* @ 17psi on 90 octane with 40/60 meth/water and I had to pull it back to 10* to be safe once I was tuning on the track. 12* worked on the street but all it took was a little more tire hook than normal and all of a sudden it didn't like 12* anymore...
yes the dyno or street hits really don't replicate a full track pass. it is really hard to find a safe place to run a good running car to 140 mph to do the same 3 gear testing. full boost shifting can also cause slight boost spikes as the engine rpm pulls down on a shift. if I run a car on the dyno I whould pull 2 degrees timing and add a little fuel for a track pass then work back into the tune once I got some runs in.
Thread Starter
Staging Lane
Joined: Aug 2018
Posts: 57
Likes: 2
yeah for sure, will make sure i try some 5th gear pulls aswell, even 6th, but would need a airport runway lol
Thread Starter
Staging Lane
Joined: Aug 2018
Posts: 57
Likes: 2
yes the dyno or street hits really don't replicate a full track pass. it is really hard to find a safe place to run a good running car to 140 mph to do the same 3 gear testing. full boost shifting can also cause slight boost spikes as the engine rpm pulls down on a shift. if I run a car on the dyno I whould pull 2 degrees timing and add a little fuel for a track pass then work back into the tune once I got some runs in.
TECH Fanatic
Joined: Feb 2015
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