Miata Turbo Forum - Boost cars, acquire cats.

Miata Turbo Forum - Boost cars, acquire cats. (https://www.miataturbo.net/)
-   Engine Performance (https://www.miataturbo.net/engine-performance-56/)
-   -   Valves too long. What can I do? (https://www.miataturbo.net/engine-performance-56/valves-too-long-what-can-i-do-68113/)

Hot_Wheels 09-08-2012 05:49 PM

back to my question, does anyone make a set of 1+ mm valves that can be used with the stock lifter set up for 99+ and vvt heads? Would it be better of contacting the manufacturer and asking for custom length valves?

Stealth97 09-08-2012 05:52 PM

Look up SI Valves, I run them in my 99 head. Was around $200 for the set IIRC

Hot_Wheels 09-08-2012 06:04 PM


Originally Posted by Stealth97 (Post 924675)
Look up SI Valves, I run them in my 99 head. Was around $200 for the set IIRC

I did a general "si valves" and theres tons of stuff, its to generic, any other keyword to narrow it down? is SI the manufacturer? or did the come off a civic si? Did you post the info or was it someone else? I just bought a set of Manley race valves which where more then the super techs, if they arent going to work for my 99 head i may end up flipping them. I tried pming you but your box is full.

thanks

Stealth97 09-08-2012 06:34 PM


Originally Posted by Hot_Wheels (Post 924677)
I did a general "si valves" and theres tons of stuff, its to generic, any other keyword to narrow it down? is SI the manufacturer? or did the come off a civic si? Did you post the info or was it someone else? I just bought a set of Manley race valves which where more then the super techs, if they arent going to work for my 99 head i may end up flipping them. I tried pming you but your box is full.

thanks

First hit on google.

http://www.sivalves.com/

stefanst 09-24-2012 11:38 PM

Ignoring all the advice, I went ahead and got some shorter shims online. So far so good. 200 miles later and no clatter or other reolated problems.
Now on to the next problem: Overheating. It wasn't doing that before the engine-swap. Oh well.....

steup 09-26-2012 03:45 PM

Your 'too long' valves could be an excuse to slap some regrind cam with mad lift (modifying base circle from 36 to 33mm needs to be compensated by... longer valves! or slimer shims)
Oh btw i seems too late on this... No idea for overheating though...


All times are GMT -4. The time now is 11:43 AM.


© 2024 MH Sub I, LLC dba Internet Brands