|
| turbotrana |
|
||
|
I normally leave my engine machinist (Southside engine centre) to choose the clearances.
But still interested to know what clearances people like to run on their mains and bigends. I think stock clearances are .0025thou bigends and .003thou mains. Should I go tighter or looser for a high performance 700rwhp capable engine
_________________ Turbo 6s rule |
||
| Top | |
||
| Mac Winter 76XB351GS |
|
|||
|
Im running 3thou all the way down the crank on my supercharged clevo stroker. Will post how it goes when it hits the dyno.
These guys go into it in a bit of detail. http://speedtalk.com/forum/viewtopic.ph ... sc&start=0
_________________ 76XBGS, 383c, custom crow cam, 4V p&p heads, Isky SS Valve+springs, extractors, 2.5"twins, MSD Ignition, Edelbrock intake, Forged bottom end, Barry Grant 750DP, thermo, discs, toploader, Holley fuel pump, SUPERCHARGED! |
|||
| Top | |
|||
| turbotrana |
|
||
|
Thanks for that info. I spoke to my machinist (Graham at Southside engine centre) and he said he would do it about 3 thou on both. Basically he reckons whenever he does them at this clearance engine never comes back.
I also read a number of performance books where 3 to 3.5 thou is the clearance to aim for in a performance mtr.
_________________ Turbo 6s rule |
||
| Top | |
||
| ebs_4l |
|
||
|
thats interesting, the subaru factory spec is .0015.. i rebuilt one and did them to this clearance.. maybe that explains now why the thing spun a big end bearing (before the rebuild).... it was a my99 sti
my 4l runs .0025 clearance, cant say ive got 600rwhp, but i can say that so far, no bearing problems
_________________ EB 4L, 8.4:1, R154, GT4202r, 4in exhaust, Greenslade Engineering exhaust manifold, plenum chamber, 90mm throttle, Garrett W2A cooler, Surecam custom, autronic SM4, Bosch 120lb, Crane HI-6, LX-92, LM-1, Turbosmart Reg, 2x bosch 044, turbosmart 48 gate. 470kw+ @ 18PSI |
||
| Top | |
||
| Who is online |
|---|
Users browsing this forum: No registered users and 10 guests |
