Good spark plug for over 20 psi ~ 450whp

[virus77]

Anyone have any good recommendations or experiences with spark plugs that will suit a rb25det running ~23psi on a t3/60-1

[Darius]

Go with coppers two steps colder than the stock plugs.

[SullivanRacing06]

ngk bkr7e ngk part number 4644

great copper plug

[virus77]

would 7's be cold enough? cars running methanol injection on 91 octane btw.

[mattblancarte]

I ran the bkr7e for my last tuning session, but switched back to new bkr7eix (iridium) for lapping use.

15+ psi on twins with 20 minutes full-throttle revving out, over and over and over with that plug.

[WhatsADSM]

I ran the bkr7e for my last tuning session, but switched back to new bkr7eix (iridium) for lapping use.

15+ psi on twins with 20 minutes full-throttle revving out, over and over and over with that plug.

FWIW I ran an entire season on regular old copper 7s. Street driving, a few HPDEs and a trip to the drag strip never had an issue.

[Carl H]

bcpr7es is what i run in my car, have done so for ages.

[mattblancarte]

FWIW I ran an entire season on regular old copper 7s. Street driving, a few HPDEs and a trip to the drag strip never had an issue.

The regular coppers seem pretty awesome to me, too.

Really, the only reason I run the iridium over the copper was recommendation by my tuner and the guys at G-Dimension (Bluefire).

[240slidekat]

i use to run coppers but i was blowing out the spark switch bkr8eix and no issues. *although it could be the gap*

[PyR0NiAk]

i use to run coppers but i was blowing out the spark switch bkr8eix and no issues. *although it could be the gap*

CIPmotorsports (240sxmotoring.com) recommends BKR8s for anything with 400+...

[eh?]

Ran bcpr7es for about 7 years, just switched to bkr8eix. The 7's ran up to 430whp/17 psi then misfired at 19 psi on pump and the bkr8eix ran to 537whp/22 psi on Q16 and misfired at 24psi. Running the 8's may have just been a band aid but I'm not sure yet.

Just try the bcpr7es and see how they work for you. They're only $2 each on clubplug..

[virus77]

I got some bkr7e but I think im going to order a set of 8eix plugs just to have on hand if something goes sour with the 7's.... thanks for the comments guys, exactly the answers I was looking for