Forums/Z31P/z31-performance-upgrade-forums engine-mechanical-aa/Who's running 17+psi
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NuCOTech: (2014-05-02 19:19:52)
I'm looking to run somewhere in the 17-25psi range. Are the 6E's plugs going to be fine or will I need to step up to 7's.
Also, anyone running 550cc injectors with nistune? Curious as to what K factor is working for you.
Butter: (2014-05-02 19:45:51)
You need 7's after 15psi IMO.
Make sure if you have a gutted plenum, that the top is welded good with nice thick metal. I thought it only happened on Fast and the Furious, but I blew the welds on my intake at 21psi.
matt85turbo: (2014-05-02 19:46:24)
NGK 1095'S are one stage colder. I would recommend those as well as lowering the plug gap to around .030 or so. I run mine at .027 and do not have issues with blow out.
300zxturboftw: (2014-05-02 19:50:14)
7's at .03-.033 gap. Don't kill your gas millage unless you are having issues with blow out.
NuCOTech: (2014-05-02 20:35:00)
Excellent. Guess I'll order me a set of 7s. Thanks guys!
Big Slappy Z: (2014-05-08 03:01:38)
You need 7's after 15psi IMO.
Make sure if you have a gutted plenum, that the top is welded good with nice thick metal. I thought it only happened on Fast and the Furious, but I blew the welds on my intake at 21psi.
I just lol'd really hard
707Redz31: (2014-05-08 14:46:58)
I'm looking to run somewhere in the 17-25psi range. Are the 6E's plugs going to be fine or will I need to step up to 7's.
Also, anyone running 550cc injectors with nistune? Curious as to what K factor is working for you.
I have 550s. 553cc to be exact high impedance but I have a mustang gt airflow sensor (the "other" ford maf curve in nistune good for 500whp) So that needed k adjustments back up. With both my k is 200.
NuCOTech: (2014-05-20 20:01:17)
I have 550s. 553cc to be exact high impedance but I have a mustang gt airflow sensor (the "other" ford maf curve in nistune good for 500whp) So that needed k adjustments back up. With both my k is 200.
Great, thanks for that info. I will use 200 for a starting point and I should be able to go from there.
harwood909: (2014-06-03 00:06:45)
There is a tick box you can check when adjusting injector size that will recalculate K-value on it's own. I would go by that as injectors swing the K-value one way and the MAF has the opposite affect on it. I don't remember which one is which. It is in one of the Nistune Manuals.