Went to the dyno the other day for the first time. I just did 3 base pulls to see what the car would do.
The setup is a follows.
gt76 x trim dbb turbo (6.5-6.8psi)
4inch downpipe, 3inch catback, 3inch catalytic with a 4inch center section. The 3inch reducer on one end of the cat sits inside the 4inch dp flex (restrictive i know).
Stock fuel setup (dual feed rail, stock pump, fpr).
Built motor, ross pistons, eagles rods, mkiv ffim, intercooler pipes, hks racing bov, lexus is 300 coils.
When we did all our passes the graph started to spike really bad top end.
The guy said it could be bad coils, spark plugs, or something ignition related.
Sparkplugs are ngk 6097s with like 1000km on them.
Now I knew my cps was in ok shape, but when i tested the three ohm readings, it is suppose to be between 160-180, and 2 of them fell around 175and one didn't even register.
I was wondering if that could have been the problem with the spiking.
Sparkplugs were gapped to .30 but # 1 was at .28 (checked them after).
Anyone have idea idea why the graph would spike so much?
Also, my tach was off a little. When the shop reved the car they thought they stopped at 6500rpm, but fell short but at least 500rpm. THey didn't rev the car completely out as well due to the ignition breakup.
The setup is a follows.
gt76 x trim dbb turbo (6.5-6.8psi)
4inch downpipe, 3inch catback, 3inch catalytic with a 4inch center section. The 3inch reducer on one end of the cat sits inside the 4inch dp flex (restrictive i know).
Stock fuel setup (dual feed rail, stock pump, fpr).
Built motor, ross pistons, eagles rods, mkiv ffim, intercooler pipes, hks racing bov, lexus is 300 coils.
When we did all our passes the graph started to spike really bad top end.
The guy said it could be bad coils, spark plugs, or something ignition related.
Sparkplugs are ngk 6097s with like 1000km on them.
Now I knew my cps was in ok shape, but when i tested the three ohm readings, it is suppose to be between 160-180, and 2 of them fell around 175and one didn't even register.
I was wondering if that could have been the problem with the spiking.
Sparkplugs were gapped to .30 but # 1 was at .28 (checked them after).
Anyone have idea idea why the graph would spike so much?
Also, my tach was off a little. When the shop reved the car they thought they stopped at 6500rpm, but fell short but at least 500rpm. THey didn't rev the car completely out as well due to the ignition breakup.
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