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More compression for 2f

Tech Talk for Cruiser owners.

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Posts: 13
Joined: Sun Jan 31, 2010 5:48 pm
Location: Ravensthorpe WA

More compression for 2f

Post by hammer down »

Just wanted to know if anyone knows the valve to piston clearance in a 2f (valve open of course) so i can get a 2f block decked so i can up the compression a bit from the lazy 8.1 to 1 , to closer to 9.5 or 10 to 1. Or does anyone know of any company making high compression pistons for the 2f. Thanks.
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Re: More compression for 2f

Post by matt.mcinnes »

hammer down wrote:Just wanted to know if anyone knows the valve to piston clearance in a 2f (valve open of course) so i can get a 2f block decked so i can up the compression a bit from the lazy 8.1 to 1 , to closer to 9.5 or 10 to 1. Or does anyone know of any company making high compression pistons for the 2f. Thanks.
http://www.man-a-fre.com/parts_accessories/pistons.htm
http://www.fj40-2f-eti-locked-n-loaded.com

Advanced (HB) Intercoolers
http://advancedhbintercoolers.com
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Post by vk7ybi »

Cant you put a F head on a 2F and get increased compression figures?
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Post by matt.mcinnes »

vk7ybi wrote:Cant you put a F head on a 2F and get increased compression figures?
No the F head has an external oil feed I think to the head if I recall correctly.
http://www.fj40-2f-eti-locked-n-loaded.com

Advanced (HB) Intercoolers
http://advancedhbintercoolers.com
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Post by vk7ybi »

Maybe its the F155 head then, from 1973?
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Post by hammer down »

I'm pretty sure the early 2f and f motor had a larger combustion chamber.
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Post by matt.mcinnes »

hammer down wrote:I'm pretty sure the early 2f and f motor had a larger combustion chamber.
Also had domed pistons, later had flat top pistons.
http://www.fj40-2f-eti-locked-n-loaded.com

Advanced (HB) Intercoolers
http://advancedhbintercoolers.com
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Post by MrGrim »

ive had the head on my 2f shaved and CC matched to 9.5to 1 and had no problems at all also all done for gas with hardened valves n seats

oh and i will be getting rid of it soon as im putting in a v8
71 fj40 front shackle reversal +3" , 55 rear springs +3", 35 15.5 claws , 60 diff's 4wheel disc's , SOON TO BE WINDSOR V8 + 5 speed
74 fj40 stock but very clean
84 bj40 3b stock and unloved
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