spark plugs

[MYGTST]

situation :

rb25det 250 rwkw target wich would the bst plugs to use?

[whistla]

NGK Copper Plugs heat rating 7

Gap them ~.7 - .6mm

Change them every 5000 - 10,000kays

Dont listen to what Autobarn sales people say

[WLD747]

BCPR7ES gapped at 0.8 - 0.90 for best results.

[whatsisname]

250rwkw is one thing, but how much boost do you intend to use to make that power? I'd suggest at least 7 heat range for 250rwkw power levels.

I've used many different plugs over the 4yrs I've been playing with my RB25DET. BCPR6ES & 7ES's are good at moderate boost levels, but I found them to be below par once I started running above 1.2-1.3bar.

I have never had a single drama using BKR7EVX or BKR8EVX. I've run up to 25psi, near on 300rwkw, plenty of drag strip passes and well over 12mths use from the same set. At ~16ea they're more expensive than $4 BCP coppers, but I've never had a set of copper last more than 500km's without suffering from misfires under the above conditions.

I run a 0.8mm gap with the BKR's

[OVL-747]

250rwkw is one thing, but how much boost do you intend to use to make that power? I'd suggest at least 7 heat range for 250rwkw power levels.  

I've used many different plugs over the 4yrs I've been playing with my RB25DET. BCPR6ES & 7ES's are good at moderate boost levels, but I found them to be below par once I started running above 1.2-1.3bar.  

I have never had a single drama using BKR7EVX or BKR8EVX. I've run up to 25psi, near on 300rwkw, plenty of drag strip passes and well over 12mths use from the same set. At ~16ea they're more expensive than $4 BCP coppers, but I've never had a set of copper last more than 500km's without suffering from misfires under the above conditions.

I run a 0.8mm gap with the BKR's

agree totally

any of you serious boys index ur plugs at all?

[MYGTST]

thanks for the replys fellaz

im currently running 10 psi and getting 195 but it begins to miss at peak power point

at 14psi forget about it

in progress of sourcing new coils

looking to reach 250kw at 1 - 1.1 bar

what is indexing the plugs ??

[RaseR]

Indexing the plugs basically means aligning all 6 spark plug ground electrode gaps so that they face the in/ex valves (apparently facing the exhaust valve is preferable). This is supposed to increase power because the ground electrode is then oriented so as not to 'shield' the spark from the incoming fuel/air charge.

Check this article for more:

http://www.fordmuscle.com/archives/2000/07...ugs/index.shtml