Hey guys, recently new to Rollaclub, I have a 77 KE35 with a worked 4K.

 

Here are the specs, it has a

-242 .050" thou lift 292 adv cam.

-head shaved 20 thou

-double valve springs

-big port grind

-ramflo air filter on the stock carby ( sad I know )

-extractors 2 inch system

 

Now its quite lumpy on idle and upwards of 2,000rpm, if I let it idle it fuels itself up quite quickly, I haven't had it tuned yet to the cam, but I was wondering would going to a hotter plug help? Or is it just the stock carby? hoping to save a bit to get a redline sidedrought manifold.

 

Any queries would be helpful.

 

Thanks

Edited February 11, 200818 yr by reg_ke35

the BP5EY stock plugs should do the trick, but going up to 6's or 7's in the heat range would hurt.

 

I run B6ES plugs in my turbo K. They mightn't make much difference on an NA motor though.

Firstly, are you running extractors?

 

If you're not, you'll get cam reversion and experience what you're experiencing now, though you say you're running a stock carb, which is leading me to think thats its been re-jetted at some point.

 

Still, with a lumpy cam, you need to be running extractors or you wont get the full performance potential of the cam.

Edited February 11, 200818 yr by Raven

If anything with a worked motor you should be running a plug one heat range colder.

 

A hotter plug is a bandaid for an old motor that burns oil.

 

Tune or rejet your carb so it isn't so rich at idle. Better yet, install a better carb and jet it to suit your engine mods.

 

A question, do you have a functioning PCV system?

Edited February 11, 200818 yr by Felix

Thanks for the replys,

 

First it does have extractors and a 2 inch system going through it. I should of noted that in the specs. I got the original carby reconditioned about 3 months ago, so I guess its just got the stock jets in it? And yes I do have a functioning PCV valve although the rubber bit that goes in the tappet cover is all broken could that make a difference? But it still seems to seal it?

 

Thanks guys