PassionFord - Ford Focus, Escort & RS Forum Discussion

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-   -   Compression ratio's (https://passionford.com/forum/general-car-related-discussion/274015-compression-ratios.html)

Minirotty Dec 14, 2008 06:22 PM

Compression ratio's
 
whats the best to have C/R at on High Reving N/A cars?

I've got 2.2 stroker on LnB Crank with Forged Pistons and Rods + T/B's lot's more spec but you get the idea.

What would you expect the C/R to be on this build?

Thanks in advance, Kev.

pa_sjo Dec 14, 2008 06:45 PM

You want it as high as you can get it depending on whatever fuel you choose to run! On pump fuel i'd start at 12:1 and go up until you reach the limit of the fuel!

Minirotty Dec 14, 2008 07:05 PM

The set up I have is said to run at 13:1, that to high?

I'll use high octain fuels.

pa_sjo Dec 14, 2008 07:12 PM

Will most likely be fine.. Possibly even on 98RON. Whoever maps your engine will be able to give you a better indication!

Minirotty Dec 14, 2008 07:20 PM


Originally Posted by pa_sjo (Post 3804222)
Will most likely be fine.. Possibly even on 98RON. Whoever maps your engine will be able to give you a better indication!


Great news, cheers bud :top:


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