Super VXer
The more I am reading I think the 2 step cooler plugs are overkill for just 5psi... going to see if I can get the one step cooler (IK20's) instead if my order has not already shipped. Might be fine in the Toyota's motors but who knows in our Isuzu motors what will work better... Time to play guinea pig.
Last edited by Cyrk : 03/11/2005 at 10:52 AM
Super VXer
Got the plugs and installed them this weekend... They did not need to be gapped as they were all at 0.040, which is stock on the VX. I must say that I am pleasantly surprised by the increase throttle and there is an extra crispness in my exhaust note. The VX kinda dies out at 100 but had much more pull passed it and was able to hit 115 with no problem.
Around town the VX seemed to shift smoother and pull harder. I was running Bosch +4 and had this weird idle problem at start up that these plugs eliminated. I would definitely recommend these plugs to any SC VXer looking for and improvement over stock spark plugs or platinums.
On the box is says it improves 0-60 times by 0.07 sec, and on the site talks about 4 HP added on the dyno. Not sure how accurate this is but my butt feels a difference. Again I went with the One step cooler - DENSO IK20.
Very happy with my $78.94 investment.
Super VXer
what do you guys suggest for Non- SC VXs
James
Super VXer
I would try the DENSO IRIDIUM IK16...
http://www.urdusa.com/Merchant2/merc...ory_Code=Plugs
Denso's listing for the VX:
http://www.iridiumpower.com/find_par...&action=Search
Hey cyrk, was wondering why "cooler" is better in the combustion chamber, I am needing new plugs and trying to decide betwen the 20's or 22's. i have a s/c with a 5psi pulley. I will probably get the 20's since you are satified, just confused on the "why cooler is better" part.
Super VXer
To lower the temperature of the combusting air and fuel is to run cooler heat range spark plugs. Many supercharger manufacturers will recommend cooler plugs for supercharged engines. Go with the IK20, 22 is way overkill.
VXer in the Sky
I'm running 16 of these in my AMG and they rock. Alpine does NOT recommend a cooler plug with their SC kit.
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