rebuilding F4R recomendations

[16v_jon]

rebuilding 172 engine from scratch , i want it to rev High, i have con rods forged pistons but i need to know what you lot recomment for the rest starting with the bottom end in the next few weeks including a helix clutch and alu fly wheel the onto the head with some sort of cam , also would you go for higher compression ?

cheers

 

[wide]

ring Andy @ GDI m8

 

[16v_jon]

im doing all the work myself, even the mapping via laptop and omex

 

[BenR]

components mean 30%, its the builders skill at manipulating tolerances to what he wants that will ensure a good build.

Get the pistons/rods balanced as matched sets, then get the crank balanced, then the front pulley and flywheel balanced on their own, not as part of the crank.

I have plenty of camshaft profiles and the ability to tweek any to suit your needs.

Remember to check cam timing and piston/valve clearance on the first dry build.

Static CR will depend on the state of your induciton system, head and cam profile.

 

[16v_jon]

bottom end ill be sorting ill be coming to you for the head work ben, Im doing it to learn about engines too

 

[BenR]

Its not that hard, but its all in the details, and getting the details spot on is hard as were talking tenths of a thou minimum.

 

[Fred@BTM]

do you need to rev it that high???

higher comp works well (as you found out when i took you for that wee blast!!!)

 

[RichMcc]

rebuilding 172 engine from scratch

*envy* good luck it sounds like its going to be tasty. Are you planning on taking pics and posting your progress?

 

[timdog]

I'll be very keen to see rpm levels and their reliability from anyone who goes this far. Still seriously contemplating racifying mine.

Yes, the builder is the key.

 

[16v_jon]

yeah fred , higher comp and low down torque like the yoz mobile like it to rev safely to 8k it aint gonna be a daily driver this is my white 172 project

rich i will be taking pictures i want it to be ready for FCS to compete with freds F4R turbo

 

[Fred@BTM]

i want it to be ready for FCS to compete with freds F4R turbo

compete!!! Pah!!!

s**t, i better get bodging!!! off to watch scrapheap challenge!

 

[edde]

i want it to be ready for FCS to compete with freds F4R turbo

You've got a few years at Freds current rate of built
FCS 2009 at this rate is when its unveiled.

 

[Fred@BTM]

Lol