what is a Block girdle?

and are they intechangebale b/w b16a, b18c and b18b?

what do they do?

Isn't that the thing like Spoon made that goes on the bottom of the engine to strengthen the mounting points that hold the bearing caps in place? for Spoon, it let them build a 12000rpm B16B! would not think they are interchangeable as I think the bearings mount slightly differently between those engines.

Quote:

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Originally Posted by tseesinngwailo

Isn't that the thing like Spoon made that goes on the bottom of the engine to strengthen the mounting points that hold the bearing caps in place?...

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Yes, you are correct. As for interchangable I don't know, never tried.

Here is one with the main caps:
http://www.strathlan.com/CMS/images/Coatings/Mains.jpg

Here is a link to ERL's page with the one they make:
http://www.erlperformance.com/produc...pexd.asp?id=18

if the bottom end is interchangeable then the girdles would be to. Otherwise i doubt it would.

different mounting points, bearing sizes etc etc

Bearing size won't really matter, that's all inside the caps and if you machine the crank or line hone the mains then the bearing changes, but not the cap as far as the girdle is concerned. Main cap size is what matters, the mounting points and the pan depth. I haven't really tried to interchange girdles from one car to another, we just buy the one on the part list unless we CnC it.

A type R comes with the block girdle
i have got the b18c one in my b20 block

Shouldnt they be the same with same cranks-shafts?

Ie - B16 crankcase can accept B18c crankshaft, and B18c can accept B20 crankshaft so they must be interchangeable... I think the bearings have different inner diameters?

This is what I always assumed with similar cranks in interchangeable blocks.

sorry i have got a b18c crank in my b20 block
not shure if that makes a differance

cool... all i needed to know..

i was planning for a b20.. but there is no girdle.. wondered if i needed custom..


hey skremn..
wat compression are u running on the b20?

i got the b18c girdle on mine not shure it it had to be modified but i dont think so it should just bolt up they are simular blocks
not shure what comp i'm running i had almost 300psi in each cylinder but going to redo the head soon cars off the road for the last 4 months
i got CP pistons in it

i would say the girdle is only neccessary if your going to go all out with your motor
i have also got a sleeved block the b20's arnt the strongest

i blew up my last motor b18/b16 combo
I didnt wanna take any risks with the next one so i spent 3g's just on the block alone