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1800 and 2l motors
BiX - January 21st, 2005 at 09:50 AM

quick question- will 2L barrels fit on a 1800cc engine without machining?

MickH - January 21st, 2005 at 10:24 AM

Yes

ancientbugger - January 22nd, 2005 at 05:48 PM

Good answer Mick,
;)

Jeza - January 24th, 2005 at 06:21 PM

But...

you will need to either machine the pistons for the 66mm crank (not sure how feasible this is?) or use the 71mm 2l crank (different wrist pin heights)

Cheers
Jeremy

mnsKmobi - January 25th, 2005 at 01:04 PM

The following is from http://www.tunacan.net/t4/tech/

"Plan carefully if you are thinking about mixing and matching stock pistons, cylinders, connecting rods, and cranks. The wrong combination can give you too much deck height or move the piston out the top of the cylinder. For instance, installing 94mm piston/cylinder set on a 66mm cranks with stock rods will yield way too much deck height. Installing 90mm or 93mm pistons on a stock 2.0 bottom end will push the piston out the top of the cylinder."

(94mm is stock 2l piston/cyl. 66mm is stock 1.7/1.8 crank stroke).

BiX - January 25th, 2005 at 01:32 PM

very simply a mate has a 1800. the valves have all burnt out. he does have a spare 2L which needs rebuilding. he is getting teh 2L heads rebuilt to go on the 1800 engine, and was thinking of also putting the 2L barrels and pistons. so this will increase the compression to much?

jakjones - January 25th, 2005 at 06:48 PM

forget it

Jeza - January 26th, 2005 at 06:13 AM

Quote:
Originally posted by BiX
very simply a mate has a 1800. the valves have all burnt out. he does have a spare 2L which needs rebuilding. he is getting teh 2L heads rebuilt to go on the 1800 engine, and was thinking of also putting the 2L barrels and pistons. so this will increase the compression to much?


No too much deck height, ie not enough compression. Could machine the cylinders down, but not a cheap fix.

Probably better to get the 96mm P&C's from aircooled.net that fit the 66mm crank, gives an engine size of 1911cc.

But if he has a 2l engine why not use the 71mm crank? With 96mm P&C's, 2056cc... nice, apparently gives 100 - 120+ horse with the right stuff, that will last for a lot of kilometers.

Cheers
Jeremy

BiX - January 26th, 2005 at 10:28 AM

he will be rebuilding the 2L fully with new barrels and pistons. just looking for a quick fix to get the car back on the road.

Jeza - January 26th, 2005 at 05:18 PM

Fair enough,

In that case I'd stay with the 1800 pistons and barrels

CU
Jeremy