Whats Spark plugs for 450HP?
 

Deciding on changing my plugs but undecided if NGK 7's will be good or 8's. I currently have HKS S35i, which are 7's aswell & in good condition. So should i stick with them or replace them?

Thanks

I am going for 500+ and i have went for 7's

Hi there have look at this threads
https://www.scoobynet.com/general-te...-trackuse.html
https://www.scoobynet.com/general-te...-or-pfr7b.html



Jura

Cheers

I run 7's without any problems mate

Nice one James.

Anyone got experience with HKS S35i plugs? Good or bad?

Racing 8s in mine based on recommendation by Bob Rawle :thumb: f**kin expensive though :cry:

TX.

Is it not hard to start in this cold weather.

^^ Me? Not at all, starts fine every time + I only use the car a few times a week so is starting from very cold ;)

TX.

I thought the higher the heat rating, the harder it is to start.

No probs with mine :thumb:

TX.

I have also heard 'stories' about 8's giving starting issues. Better start saving up for the 8's lol.

iv just put 8's in my 400bhp 2.5 starting is no different to the 7's they replaced

Aladdin - just spotted you have a S202 fella, fair play to you :luvlove:

TX.

ive got 8's in....

it starts just as badly as it did with 7's......

Using 7's in mine.

Steve

^^ Yours is slow though Steve ;)

TX.

Thats the driver... Not the car TX

@ 450 with moderate boost id stay on 7s. No point going to 8s if you dont need to.

What boost/turbo/fuel are your running to achieve your 450?

Im using 7's on mine with out problem, i had probs with ALS and 8's, was fine on the road but missed on the strip

Stews 650bhp HKS drag car still runs on 7's

Not mapped yet, just preparing for it. MD T on Vpower.