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Discussion Starter #1
Hey all,

Was browsing Ebay looking for Supra parts...someone was selling Denso Iridium Spark Plugs which he said adds 8.9 HP and 9.6 TQ...

Here's the link:
http://cgi.ebay.com/ebaymotors/aw-cgi/ebayISAPI.dll?ViewItem&item=597842950&r=0&t=0

Anyone trys these out and is he correct that it adds more HP? Is it worth it. Currently Im using the Platinum plugs from the Toyota Dealer for my 60K service.

My NA needs all the juice I can add to it.

** Also do you know which computer chip I can buy for better performance for an NA and where to get it?

Thanks..
Brian
 
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Discussion Starter #2 (Edited)
I like Bosch -- Denso in a 2-cycle 250cc

My NA is 15 years old, and I can't tell you if Denso will get you 9 more HP, but I switched to the Bosch +4 and there was a definate improvement for only about $25. Was it just new plugs? I would like to see some dyno tests on the Densos on a real car.
On the Denso page at

http://www.denso.co.jp/PLUG/iridium-e/q15.html

they did their "power" test on a 250cc 2-cycle engine. I don't know if someone extrapolated to get 9 HP from a Supra, but I would think an oil-gas mixture has different burn aspects than an all gas. In fact a 2-cycle plug might be much worse in a 4-cycle engine!

Just to give another view, you might also check out this site, which while it refers to SplitFire plugs, might be appropriate to almost any.

http://www.ftc.gov/os/1997/9702/splitfir.htm
 

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Um i thought the stock plugs were Denso Iridium thats what i got when i got mine from the Toyota Dealer.
Later
 

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ThomsonCharm said:
Um i thought the stock plugs were Denso Iridium thats what i got when i got mine from the Toyota Dealer.
Later
well turbos come with NGK's, I would have thogiht came with ngks too?
 
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Discussion Starter #5
NGK in First NAs

The first MKIII NAs came with NGK Platinums, number BCPR 5EP11 gapped at 1.1mm or .043 inches. The turbos used BCPR 6EP-NE gapped at .8mm or .031.

There was a Denso alternative, PQ16R for the NA, and PQ20R-P8 for the turbo.
 
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