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Discussion Starter · #1 ·
I know JWT used to make them, and sell for a pretty penny, but what are the current options for upgrading to raise the rev limit safely?

I know I saw that sr20ve valve springs can be used, but what part # (and do H22 springs work)? Do the retainers need to be replaced too, and is that it?

Thanks!

Going to use a RR head with Tomei Poncams.
 

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You can use VE springs. You need the VE retainers as well and add an inner spring seat. H22 spring are almost a direct fit. Even a VE stock spring setup is better. Most RR motors don't make power much past 7000 anyways so stock VE springs are probably ok. But any VE drop in spring will work
 

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yeah, should be ok... if anything, add a stock VE inner spring to the setup. but if you are using a GT28 size turbo then most likely you wont make much power past 7000 anyways. a GT28R setup at 15-16psi, cams, etc usually makes max TQ at 4000rpm and max HP at 6000-6500ish and falls on its face above 7000...and is useless above that really.
 

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You can use VE springs. You need the VE retainers as well and add an inner spring seat. H22 spring are almost a direct fit. Even a VE stock spring setup is better. Most RR motors don't make power much past 7000 anyways so stock VE springs are probably ok. But any VE drop in spring will work
Yup fairly straight forward, finding the inner washers is the hardest part. Reving to even 7.5k on a RR sucks, especially NA, after 7k you start getting a nasty oil smell. Turbo at least helps you maintain some torque up there not to smell but yeah power sucks. I am on RR cams though

Here are some steps:
http://www.g20.net/forum/showthread...gs-in-an-RR-(Allows-for-8k-redline)&p=1854370
 

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Discussion Starter · #15 ·
Gone with VET valve springs. Trying to decide on 2 cams.

260duration each
11.20mm lift

298/289 duration
11.6i/11.2e lift

PTE6262 turbo, ported head, custom plenum/q45 tb. Which should I choose, and will the 11.6 lift hit the piston? Flat top 10:1 forged pistons.
 

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With that turbo at high boost and Reving to 8-9000 the larger cams will make more power. However the others smaller ones will drive better down low, have better mpg idle better and overal driving will be better when not in boost w
 
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