Recommended Engine Builders

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Thats exactly it SLED, minimum seat pressure that works. Which comes down to experience what does.

The RB26 heads run 50lbs seat pressure standard; the rb25 runs very close to that but uses the heavier hydraulic lifters. As you would know heavier valve train requires more seat/open pressure to control the valves.

Mine being setup so loose because they really didn't have any experience with the rb25 head has cost me a lot of money and what really got up my nose is when I sent it back to be fixed up I was charged quite a lot.

Such is life; given time they will get the know how of what does and doesn't work with the rb25 heads.

Typically its known that ~70lbs of seat pressure with the hydraulic rb25 head works very well.

R32Abuser; if you do get a motor built up by them ensure they restrict the oil delivered to the head.

Without a dry sump setup its really the only way to control the oil being dumped in the head and filling your catch can under constant high rpm as without a decent vac setup the oil cannot return to the sump quick enough.

I run a single 1.5mm up front and blocked rear. Works extremely well.

Don't get me wrong Miltons do awesome work; its just a slight lack of experience with one motor type that left me a little unstuck. They are getting in to the drift scene so no doubt a lot of R&D will be done.

In saying all that there is ALWAYS some one who's had a bad run with a workshop from time to time.

The experience wasn't bad just the outcome which has been frustrating when I had to go else where to seek advice and get the problem finally rectified.

I'm going to be running a 1mm ristrictor with the other blocked off but I dont have hydrolic lifters so I'm a little better off. you can also make a return from your catchcan to your sump so you dont loose all your oil at full RPM.

Its worth giving Darren at lewis engines a call as he can set up the best combinations and tricks to keep engines going strong in drift or street conditions.