What plug gap for 25+PSI?

MK3Brent

MK3Brent

Very expensive....
Aug 1, 2005
2,878
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Greensboro and Greenville NC
Hey guys,

I'm about to load up the trailer to go dyno the car in Jacksonville NC. After doing some rough pulls at 26psi, I'm getting some breaking up.

AFR's are about 10.5:1 and the current plug gap is .028"

I have a set of .025 about to go in, so that might clear it up.

Anyway, I was curious.

Thanks.
 
M

MRSUPRA

New Member
Apr 11, 2005
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Maryland
Nice.. Can't wait to see the dyno numbers. I've run up to 24psi with no breakup when my plugs were gapped at .028. Sean suggested to me to get the HKS DLI for high boost. Is your idle rough with it gapped at .021?
 
radiod

radiod

Supramania Contributor
Dec 13, 2007
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Abbotsford, BC
why are you at 10.5:1 afr? thats pig rich!
Click to expand...

Well if I were going to be going to the dyno I'd much rather been those types of numbers then the opposite. Looking forward to seeing dyno sheets :D
 
MK3Brent

MK3Brent

Very expensive....
Aug 1, 2005
2,878
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Greensboro and Greenville NC
williamb82;1366761 said:
why are you at 10.5:1 afr? thats pig rich!
Click to expand...
Perfect AFR for when I add 5 more psi at the dyno.
Plus nitrous soon.
MRSUPRA;1366755 said:
Nice.. Can't wait to see the dyno numbers. I've run up to 24psi with no breakup when my plugs were gapped at .028. Sean suggested to me to get the HKS DLI for high boost. Is your idle rough with it gapped at .021?
Click to expand...
Hey Matt.
I have a MSD DIS-4 and new coil packs.
My idle did not change, surprisingly.
Look forward to a video of all the supras dynoing tomorrow morning. :)

radiod;1366791 said:
Well if I were going to be going to the dyno I'd much rather been those types of numbers then the opposite. Looking forward to seeing dyno sheets :D
Click to expand...


Thanks.
We're shooting for 600+ tq.
Hope my RPS holds.
 
I

IJ.

Grumpy Old Man
Mar 30, 2005
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I come from a land down under
Some more dwell on boost will help drive the coils a bit harder Brent, not sure if this can be done with a DIS4 though, another option would be to use MSD's 480v Coils they will fire a plug in a cup of Oil when driven by a DIS4
 
MK3Brent

MK3Brent

Very expensive....
Aug 1, 2005
2,878
0
0
Greensboro and Greenville NC
IJ.;1366817 said:
Some more dwell on boost will help drive the coils a bit harder Brent, not sure if this can be done with a DIS4 though, another option would be to use MSD's 480v Coils they will fire a plug in a cup of Oil when driven by a DIS4
Click to expand...

I'm using the 8224 MSD coils
3148RJW72BL._SL500_AA280_.jpg


BLASTER REPLACEMENT SPECIFICATIONS
Primary Resistance: 0.35 ohms
Secondary Resistance: 7.8K ohms
Maximum Voltage:
40,000 volts
Inductance: 4.2 mH
Turns Ratio: 80:1
 
Supra-Man18

Supra-Man18

New Member
Nov 24, 2007
357
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miami
Whoa.. Your motor lifts quite alot on the intake side... At What boost did you make that 479 hp? Did you try the nitrous ?
 
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