question on which plugs to run 103s or 104s

[samuelcb409]

my current mods are:

3.0 MPS, CAI, SD Headers w/Custom 3"DP, 160* T-Stat, ZZP 10.3 Wires, Full Size intercooler, #42.5s, Ported LIM & Gen III, LS1 TB w/85mm MAF , s1x Cam, #90 Springs, Intense Pushrods, Fully Built ZZP Transmission, HD Trans cooler, EGR Delete, Cat and U Bend Delete, Magnaflow Resonator & Mufflers, Tuned by Zack of Kratos Concepts/MOAR! Peformance

currently running 104s gapped at .50 but was wondering if 103s would be better cause ima gonna try a 2.8 pulley and tune this week. and also if 103s what gap should they be at?

[matt5112]

How your plugs look?

[SlowNA06]

Plug selection is kind of a knock thing. If you're not knocking, why would you want to drop heat ranges?

[gtpsleeper]

if youre not knocking and the plugs look ok... with those mods I dont think itll make a difference honestly performance wise...

[samuelcb409]

Just wanted to get some opinions on the plugs, if I do get kr on the 2.8 with 104s would changing to 103s help any just asking cause might try it in few days

[Fivefingerdeathpunch]

I wouldnt suspect plugs first if you were to get KR.

I'd fix what is wrong in the tune first.

[samuelcb409]

Ok thanks

[samuelcb409]

Does anyone know where I can get a oversized radiator from

[blueguy]

Summit.

[t24moore]

I would try the 103 and see what happens, its cheap. I used a 103 gapped at .45 if I recall correctly back when I had an xp cam intercooled on a 2.8. But like stated above I would look at the tune. Where is the KR happening? At the top of the gear?