I'm going to be rebuilding a spare M20 head that i've had for a while. I've been driving my car a lot harder recently and have read too many post about snapped rocker arms. I'm just trying to find out what I will need to upgrade so I don't have to worry about snapping anything. I want a reliable head that can be redlined 1-4 atleast twice daily. I'm not looking for a HP gain as i'm saving for a 951, just something reliable and fun. I will be attending a couple of auto-x aswell...
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you wont snap rocker arms if you dont indulge in prolonged periods of over-reving. The eccentric is a weak spot, only solution is to use tougher rocker arms or switch to roller rockers.Just a little project im working on
- http://www.lse30.com - -
Any brand recommendations for either?Comment
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I dont think any exist.
A bloke on E30tech was building a set of roller rockers for them, but it would be a long time before a set were available for purchase.
The best you could hope for would be someone like korman who sell lightened items. Otherwise you might have to get some pressed.Just a little project im working on
- http://www.lse30.com -Comment
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sry to sound like and idiot.. but what are roller rockers?
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Schnitzel Not Rice....Comment
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I don't really know either, but i'm thinking the ends of them have bearings so they don't just rub...
google = http://www.compcams.com/information/...ts/RockerArms/Comment
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the new rocker arms manufactured are stronger than the original ones in your car. The design was updated with a wider bridge over the eccentric, just just buying the new updated ones serve as an "upgrade", otherwise VAC or someone sells reinforced rocker arms.Comment
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Roller rockers greatly reduce friction on the valve train. Instead of having a fixed eccentric for a tip, the have a roller for a tip. These are usually seen on v8s. Ive got a set of crane roller rockers on my 327 chevy. That motor can r3v beyond 7500 rpm along with a few choice mods.
My question would be, how would you adjust the valves? (must be why no one makes them). To adjust rockers on a small block is just as simple as a bmw, but these is no rocker shaft on a small block. So instead of adjusting the eccentric, you adjust the rocker. Cant do that on a bimmer.
back on the topic at hand: Im building a spare head as well. I would look into the korman/bmp valve springs, new rockers/eccentrics. Clean up your ports, polish exhaust. Polish chambers, take valves out and polish them. Buy a stem seal kit (cheap, like 10 bucks) and install the new seals. Maybe a cam, and your set.Old and improved:
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Re: I'm rebuilding my head
What brain are you gonna go with?Originally posted by Kilomph
:shock:
DAAAAAAAAAAAAAAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA!!!!! !!!!
:rofl:
...... :|
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Re: I'm rebuilding my head
hahahahaha... good one enercity.Originally posted by enercityComment
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read up a little about rollor rockers, they sound pretty cool lol.. but like.. can u find them for m20's?????</img>
Schnitzel Not Rice....Comment
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