 Oversized valves 5sfe, checklist |
 Apr 25, 2012 - 9:37 PM
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Enthusiast  Joined Sep 30, '11 From Sydney Currently Offline Reputation: 0 (0%)  |
My friend recently built his 88 bmw head and the difference it makes is unbelieveable. Since the 5sfe has an economy head im sure the difference if done right will be amazing.
After much research ive decided 2mm oversized valves a good port and polish and cams would be great. The valves are what I need advice on, the 2jz valves are very close to the 5sfe just with bigger heads: 5sfe intake: 32x6x97.6 mm 2jz intake: 33.6x5.98x98.55 mm 5sfe exhaust: 27x6x98.4 mm 2jz exhaust: 29x5.98x99.1 mm So I would go with stock 2jz exhaust valves and +0.5mm, 2jz intake valves. This might be a stupid question but apart from the machine shop regrinding the valve seats to fit the OS valves what else do I need to do? Will i need 2jz stem seals?, will i need different buckets/lifters since the stem length is slightly different? This isnt a job im going to be undertaking soon more just research and saving the $$ stage because getting beaten by civics at the track is giving me the irrits lol. Any help would be appreciated! Thanks |
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Apr 29, 2012 - 6:00 AM
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Enthusiast Joined Sep 30, '11 From Sydney Currently Offline Reputation: 0 (0%) |
The GE and GTE valves are identical from what I can find. The stem lengths are 0.95mm longer on intake and 0.7mm on exhaust so that has to be made up with shorter buckets/shims. I also like the idea of the shimless buckets for upgraded cams.
With upgraded springs and retainers isn't that only necessary if I wish to up the rev limit and have the thing go to 9krpm? |
Posts in this topic
UVZ164 Oversized valves 5sfe Apr 25, 2012 - 9:37 PM
ricochet1490 Smaay? surprised he hasn't chimed in here. Apr 25, 2012 - 10:32 PM Syaoran A GOOD head job will give you a noticeable increas... Apr 28, 2012 - 1:51 PM UVZ164 The work to put a GE head on is just far too much ... Apr 28, 2012 - 8:03 PM Syaoran Probably shims would be enough... but shimless buc... Apr 29, 2012 - 12:23 AM Smaay i have heard of doing this very thing. if the stem... Apr 29, 2012 - 1:11 AM hatchy_gt-s I would suggest just getting new shims as shimless... Apr 29, 2012 - 5:59 PM
Syaoran QUOTE (hatchy_gt-s @ Apr 29, 2012 ... Apr 30, 2012 - 5:10 PM
Smaay QUOTE (hatchy_gt-s @ Apr 29, 2012 ... Jun 1, 2012 - 10:36 AM UVZ164 Ok so basically a rough list of what is required:
... Apr 30, 2012 - 5:37 PM UVZ164 What about valve guides, anyone have an idea what ... May 2, 2012 - 10:00 PM |
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