Miata Turbo Forum - Boost cars, acquire cats.

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-   Engine Performance (https://www.miataturbo.net/engine-performance-56/)
-   -   E85,boost,what static compression (https://www.miataturbo.net/engine-performance-56/e85-boost-what-static-compression-80318/)

nitrodann 08-12-2014 01:20 AM

Awesome.

Dann

TNTUBA 08-12-2014 02:25 AM

2 Attachment(s)
I run these pistons:
https://www.miataturbo.net/attachmen...ine=1407824701

https://www.miataturbo.net/attachmen...ine=1407824701

And 25 PSI of boost.

I'm not on E85(C-16) but it does work rather well. And since you are a dedicated autocross car, the cost of the fuel shouldn't be overly prohibitive. I spend about $80 in fuel for a Pro Solo with a codriver.

nitrodann 08-12-2014 02:40 AM

Whats the total compression?

Dann

TNTUBA 08-12-2014 03:01 AM

When I rebuilt the motor this winter it calculated out to be 10.36:1. I would consider going higher but then my valves and pistons would start having "space" issues.

guttedmiata 08-12-2014 08:07 AM


Originally Posted by TNTUBA (Post 1156516)
When I rebuilt the motor this winter it calculated out to be 10.36:1. I would consider going higher but then my valves and pistons would start having "space" issues.

Stock cams? Now you have me a little worried.

TNTUBA 08-12-2014 08:46 AM

Stock cams...yes. stock cam timing...no. I also have larger diameter valves. Some time with a rotary file in the valve reliefs could fix it.

guttedmiata 08-12-2014 12:25 PM


Originally Posted by TNTUBA (Post 1156546)
Stock cams...yes. stock cam timing...no. I also have larger diameter valves. Some time with a rotary file in the valve reliefs could fix it.

+1mm valves here with higher lift and non stock can timing by default with longer duration. Hope I can make it work.

guttedmiata 08-12-2014 11:23 PM

Sent you a PM Eric.


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