View Full Version : supercharge K24/k20a2?
freddy914
06-02-2008, 08:19 PM
i was thinking of supercharging my k24a1 with 11:5:1 comp.pistons and k20a2 head with stage 2 cams.. would the jrsc race kit be to much boost or should i stick with street kit..
MugenReplica
06-02-2008, 08:49 PM
Higher compression pistons and boost has never proven to be a great combination. Typically, you will want to run LOWER compression pistons with boost. Differences in piston compression account for maybe 10% at the most of the useable power. With such a high compression, you will have a hard time tuning out knock as well as wearing out rings and valve seals quickly.
Look into the piston makers and see the compressions on their boost-specific products. You will find 8-10.5:1 range. N/A pistons are like 11-12:1.
Because the engine is boosted, a higher compression is no longer necessary as the forced air provides more than enough positive pressure for kick-ass combustion.
Quoted for JimmyJames...
freddy914
06-03-2008, 02:27 PM
Quoted for JimmyJames...
thanx for the info.
jimmyjames
06-04-2008, 09:10 AM
To add, what you're proposing is called a "poor man's TSX"
You can find an overview of the whole process here;
http://www.sportcompactcarweb.com/tech/0406scc_shortblock_vtech_cylinder_head/index.html
In that article, they wisely stayed with the stock 9.6:1 pistons.
si4life
06-04-2008, 09:28 AM
Great info on that link. Thanks!
To add, what you're proposing is called a "poor man's TSX"
You can find an overview of the whole process here;
http://www.sportcompactcarweb.com/tech/0406scc_shortblock_vtech_cylinder_head/index.html
In that article, they wisely stayed with the stock 9.6:1 pistons.
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