Will It Wreck My 4K

[Mustard]

I recently done some work to my 4k.

I got the head shaved down so compression is at 10.1 i think

And had the oringinal cam reground but can't remember specs and got extractors with 2 and 1/2 inch exhaust but with stock carby.

And I'm about to slap a sc14 supercharger on it and is wondering if anyone can tell me if it will just go pop or will it last?

Please need some help?

[Evan G]

yes it will go epic'lly kaboom. i would run 14psi just to be sure

[Mustard]

Serious dang it so wats the best idea get new head and cam?

[Evan G]

blower cam grind. less compression

[Mustard]

Sweet thanks heaps

[Taz_Rx]

Flog off your 4k and start again.... Maybe with a 5k

[5ksev]

Iv got a 5k with same compression & exhaust, but 25/65 cam with .474 lift.. And it's stupidly high compression for any type of bolt on..

[Mustard]

Yea thats what i was thinkin maybe gettin a 5k

[altezzaclub]

Surly it depends on the rate of spin you put on the S/C??

 

So the pulley diameters determine the boost, just boost it to 5psi, then 8psi then....

 

Are you gong to fit a blow-off valve to limit the boost?

 

You could fit a pair of head gaskets, or cut a 2mm blank out of steel, the sort of things we did while rallying.

[Mustard]

Yea i don't no really ill work it out when i get it just yea wondering how to fix the problem but yea i might try doubling up the gaskets but defently thanks for your help

[SLW42]

Just go buy another 4k and sell yours, strap the charger to the new one get the cam reground to suit the charger and have fun