Im planning on doing a (N/A) motor build this winter, so i thought that i should start a post to get everything
figure out and get advise and input from everyone.
My plans are to get a spare 2.2L ecotec and do the build then swap motors.
As for the build, mild Port/polish head, overbored .020 maybe larger, oversized forged high compression pistons
(maybe 11:1 cr), stage 2 or 3 cams, 1mm oversized valves, 3 or 5 degree valve job, stiffer springs(not sure which
ones), 62mm throttle body, 2.4 ss intake manifold, larger injectors(not sure how big), knife-edge/balanced crankshaft,
stage 2 or so clutch, and a very good tune.
There might be some more things that i cant think of at the moment but this will give you a good idea.
Please fill free to add your input and advise.
sounds good to me, with bolt ons it should do pretty well on the dyno. possibly 175-190whp.
if you have the money i suggest a patriot head.
Every time I scream "Release", I mean it, you know it. I feel the day. Black 7.
Sounds like you need to make up you mind on a bunch of stuff. But i can help.
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oversized forged high compression pistons(maybe 11:1 cr)
Stick to the stock 10:1 so you can slap a S/C or turbo on when you get tired of N/A.
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3 or 5 degree valve job
You can never have too many angles on your valve. You can put 10 or 15 angles on the valve if you have to time to devote to it. More angle = smoother flow across the valve and into the cylinder.
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stiffer springs(not sure which ones)
Im going to be running Supertech 94lb springs in the head i just picked up.
FYI the rods/wrist pins are the weakest link in our ecotecs. You might as well get a forged set while you are in the engine.
Tinkles
2003 Cavalier 1SV
Bagged and Blown
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Stick to the stock 10:1 so you can slap a S/C or turbo on when you get tired of N/A.
ok, so ill stay with the stock 10:1, but what about overbore? Should i even bother doing this, and if so how big can i possibly go? I know there is a certain point where i have to re sleeve.
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You can never have too many angles on your valve. You can put 10 or 15 angles on the valve if you have to time to devote to it. More angle = smoother flow across the valve and into the cylinder.
What do you recommend for a somewhat daily driver and weekend dragger?
I think im going to use the Eagle Forged h-beam connecting Rods.
Thanks for help.
Bore the engine enough to only clean up the liners. That way if the engine blows you can still clean the up the liners again. Boring wont do jack in these small engines. I have a 400 cube inch Pontiac that was bored .030 and i only gained 6 cubic inches. Ecos are 134ci i believe so you'll be lucky to gain 2ci of displacement with a .030 overbore.
As for how many angle on the valve? It is completely up to you. Just remember that you have to machine the valve seat in the head to match each angle on the valve.
Tinkles
2003 Cavalier 1SV
Bagged and Blown
