classic sti heads Q
how can you tell if heads are sti ones:confused:
been offered some to fit my 94 RA,but the lad is unsure what year they are off and if they are defenitly sti ones they are still fitted to block (which has a suspect snapped conrod) anyone no how i can tell without stripping heads down |
You will need to remove a cam and see what is below, if its an RA it should have solid tappets with shims like this http://images.fotopic.net/y76bkq.jpg
The shims are pretty hard to get now Mark |
my orginal engine is a RA
i was offered some sti heads to fit my RA (was told they will improve performance) once its been mapped but the lad was unsure they are defo sti heads he said i can take engine and remove heads and check to see they are sti ones what am i looking for to confirm they are sti heads:confused: are valves a different size:confused: anyone:thumb: |
bttt anyone:confused:
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This answer has been posted above :)
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If they have a oval coil hole, you can remove the valve covers and see if the tappets are "solid". On a WRX you can clearly see the shim.
V3-V4 STi heads should look like this when you have the valve cover off http://i58.photobucket.com/albums/g2...Picture523.jpg If they have a square coil hole like this, you need to take out a lifter to see if they are V2 STi RA. http://i58.photobucket.com/albums/g2...Picture490.jpg If the lifters look like this, RUN :lol1: http://i58.photobucket.com/albums/g2...Picture487.jpg Cheers |
thanks for that one mate:thumb:
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Sorry for dragging this back up. But, does anybody now the letter or number on a V2 STi RA valve? And what power could they product?
Cheers Chris |
anyone?
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Chris,
STi Version 2 RA valve codes are, INKO + EXKO As mentioned above it will have Top Hat Inner Shims and also Green colour coded Valve Springs. Mick |
Thank you for that.would you know what power they're cappable of? Or how do they compare to the sti V3 & V4?
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Sorry to hijack, but I'm about to pull my heads apart. Is that thing where it says 'If they look like this, run', a hydraulic lash adjuster off an early WRX head?
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Looks like a hydraulic lifter to me.
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Originally Posted by silent running
(Post 7806422)
Sorry to hijack, but I'm about to pull my heads apart. Is that thing where it says 'If they look like this, run', a hydraulic lash adjuster off an early WRX head?
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How much power can you run on RA heads & STI 4 heads safely :wonder:
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