Post Info TOPIC: Old Prolite Makeover


Forum Junkie

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Old Prolite Makeover


I am rebuilding my SR20 non turbo and other bits on my old prolite and thought I would share. 

So far I have rebuilt the shocks as they are unique home made things that haven't been touched in a long time.

Removed the torsion bar and fitted coil overs to the rear.

The engine has just been bored 20thou over with all new bits and lots of head and manifold work.

Still deciding about knife edging the crank so if anyone has any thoughts or experience let me know.

The three pics are the 12.5:1 Wiseco pistons. Will be shimmed to 11.5:1 compression. 

Polished lower engine plate to get the oil back into the sump faster as I don't any space for a bigger sump. Don't know if it works but why not.

Port and polished intakes in the head. Not cleaned yet.

Most of the work is being done at Motorreco in Wodonga. It will be blueprinted, balanced and have and out of chassis dyno.

Thank god he needs some landscaping or my wallet would look even more anorexic, if that is possible. 

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Rehab Dropout...

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they have done some good work should go well


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Regular Poster

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I'd seriously consider some internal baffling to stop the oil ending up at the rear of the engine(away from the oil pickup)when braking. My SR20 used to lose oil pressure when braking over bumps and then eventually spun bearings. I replaced the standard baffle with a solid plate which I put in one way valves that I made using body washers. No oil pressure issues after doing this.

Shame to wreck a good engine



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Forum Junkie

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All of the head and polishing work was done by me because I got a quote and had to decide between divorce and doing it myself. I'm sure there is lots of helpful comments on that subject.

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Forum Junkie

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The sump is being baffled, so I know it's a long shot but if you have any pics of your sump I would be grateful.
I am doing every affordable option to better utilize the oil as it is the biggest stress with the SR20.
After numerous differing opinions I went with knife edging the crank due to less aeration of the oil and a better throttle response.
The dry sump option was thousands.

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Forum Junkie

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Should move this too Build ups can anyone let me know how to do it.


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Rehab Dropout...

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i've heard that the turbo SR's have a higher flowing oil pump , due the having wider pump gears ,
can i ask what the knife edgeing cost , was it a stock crank ?


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were we're goin we dont need roads.

it's not the speed of life that scares me,
it's the sudden stop at the end ,


Rehab Dropout...

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Just copy & past



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Forum Junkie

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Knife edging was $660 INC or $550 cash. It is done on a CNC machine, but he had to buy the program especially for that crank. I get it back Monday arvo so I post some pics. 

The guys who have done it before said it is the best bang for buck, but a definite no go for turbo SR20s as it reduces the life of the crank and bearings too fast. 



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