i am posting this for a friend. its got the full race gt35 setup....we got it tuned and it ran great with regular ngk plugs but when i put ngk iriduim 2 step colder it seems to cut out around 8000rpms....it starts popping....i dont think it det. though....it has a great tune on it.....he even gap the new plugs tight...anybody got ideas.... its only making 370 whp i doubt he needs to upgrade the ignition though but what do u guys think...

 

What are the plugs gapped at? The higher the boost the tighter the gap.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by airwalk07143 &raquo;</TD></TR><TR><TD CLASS="quote">i am posting this for a friend. its got the full race gt35 setup....we got it tuned and it ran great with regular ngk plugs but when i put ngk iriduim 2 step colder it seems to cut out around 8000rpms....it starts popping....i dont think it det. though....it has a great tune on it.....he even gap the new plugs tight...anybody got ideas.... its only making 370 whp i doubt he needs to upgrade the ignition though but what do u guys think...</TD></TR></TABLE>

Were you careful in gapping the iridium plugs? the tips are very fragile and break off.

 

im not sure what he has the gap set at ill ask today when we pull them and ill check the iridium plug..thanks for the ideas.....anyone else got ideas

 

i say the plugs are the first

what size injectors does he have...

 

what are u using to tune? It's either spark or fuel....

 

If it ran great with the NGK plugs, put them back in.

 

Iridiums have been said to fail at higher boost. I havent expeirenced this yet, but some of the other FI guys have said it.
They all went to copper, changed every oil change.