Quote: Originally Posted by MRKING bump this thread up instead of all the crap can someone just give it to me so i dont have to link up 20 average posts to make 1 good post what do i need to do to my rb30 bottom end to fit the 30 head?? nag rob for those pistons

Quote: Originally Posted by MRKING bump this thread up instead of all the crap can someone just give it to me so i dont have to link up 20 average posts to make 1 good post what do i need to do to my rb30 bottom end to fit the 30 head?? i say you'd just bolt the 30 head onto the rb30 bottom....... should be no problem lol Some original photos have not been recovered yet.

lol i meant 26head haha

crap all.. it's all done to the head. Bit of welding water gallaries.. and bolt it on. I o-ringed mine, using a standard genuine Nissan gasket, came up a treat. I paid around $1500 for a R33 head complete with inlet manifold. $1300 for a full reco and to modify it to fit the RB30 block. Cams havent been touched yet. The RB30 block got dipped, and cleaned, o-ringed, honed, new ACL race series bearings, SPOOL rods, CP forgies (8.8:1 comp), balanced brand new VLT oil pump, romac balancer, JPC race sump, for around $6000 or so.

bit more detail morgs i no your switched on !!!

Quote: Originally Posted by MRKING bit more detail morgs i no your switched on !!! Nahh, my engine builder did it... however, I'll get info on exactly what he had to do, he said it was a piece of piss. I know he ended up using ARP RB25 head bolts too.

but there 10mm

yeah 10-11mm. we're gonna see how it goes, if its a problem we'll drill and tap it with the bigger ones.

Bro, I thought for the RB26 head you don't have to do any welding or anything? I thought it drops straight on with RB25 headbolts/ studs like you said? Jason.

rb25 head bolts are 10 or 11mm rb26 head bolts are 12mm im dodgy but not that dodgy im interested in what people have done with there plenum and **** im going to tap the water holes and run my own cooling system to many hoses on the stock setup

I hope your not doing this to a GENUINE BT1 Some original photos have not been recovered yet.

im building motor and everything first then working the rest out later

yeah, but to drill it and tap it for the bigger ones was $450 odd.. can' really be justifed, unless these ones fail. I don't recon they will, a good friend is using em and making 700rwhp in an R33 26/30 with those studs. Every engine is different i guess. Thats the way to do it tho, I have an engine stand with an assembled long motor on it, then when JPC have my gate, turbo and exhaust package finished I'll bolt that on. Gonna get the inlet modified a bit too.

yeah im going to prep my block so its getting done thinking of getting very very trendy with my bottom end ill keep you guys in the loop im going to strip my block over the coming weekend was working on the head and stuff over the weekend

cp 8.2 pistons suit single cam, if u change to rb26 head could u use them pistons or comp will be to low

It would drop the compression down to low I would think.

yeh i been told by spool but they make cp 8.2 for twincam i dont see difference in comp if both are 8.2

Chamber size between the two heads, piston dish size etc.. the cp pistons would be more like n/a pistons in size as a very basic reference.

Ur onto it Luke, i thought thered been many write ups on this? 26 heads dont need any modifying.

whats the best way running the tensioner & idle on the 30block for twincam