R34 And Gtr 33 Engine Question

[R34ZOR]

Hello all, I just have a few questions in relation to my r34.

*Im just wondering is it possible to put an rb26dett bottom end on an rb25det neo?

*Is it possible to put rb26dett pistons into an rb25det?? if the block is hooned out to accomodate? or are they completly different?

Also by me doing this I would be using rb26dett pistons correct? sorry for the noobish questions im only just getting into really modifying it.

Thank You

Mike.

Edited April 6, 2008 by R34ZOR

[R34ZOR]

Anyone?>

[skylinekid]

ok for one.... the gtr crank has a stroke of 73.7mm.... the gtt 71.7mm the rods are exactly the same in lengths but the pistons have a different pin height..... neone correct me if im wrong

but yes as far as i know the gtr crank rods and pistons will fit into the 25...

Edited April 6, 2008 by skylinekid

[Adriano]

You could fit rb26 crank rods and pistons, but due to the combustion chamber size of the NEO, you would end up with too high comp. What are you trying to achieve?

[skylinekid]

You could fit rb26 crank rods and pistons, but due to the combustion chamber size of the NEO, you would end up with too high comp. What are you trying to achieve?

ahh yes good point adriano didnt even think of thats

[aphid]

if you were to use the 26 block you'd also need to block off the original and tap in an external oil supply for the vct, much the same as you would on an rb25/30, and also have the sump welded shut

[10MinuteCar]

So if the compression rate is too high, what happens then?

[skylinekid]

u have a car which u cant even put 5 pounds of boost into unless u run av gas ARGHAHAHAHA

[R34ZOR]

Okay well im not 100% sure what im trying to achieve.

For starters i have a spare 26 bottom end. And a brand new set of jun pistons.

As I have seen alot of threads about 25/30 bottom ends so was thinking along the lines for a 25/26 bottom end.

So would it be in my best idea to scrap this idea??

[arep3]

personally i couldnt see much benefit. you could sell the block and pistons together or seperate. buy an rb26 head and build a true rb26. too expensive to bolt on a 25 head to a 26 block.

[R34ZOR]

ah okay then. Yeah picked up the bottom end cheap. And really wanted to use these jun pistons haha. Think i was getting too ahead of myself.

[Adriano]

Sell it all, and put some goodies on the NEO

[R34ZOR]

Sell it all, and put some goodies on the NEO

Yep thats what i shall do. Cheers all for the comments.