From knowing nothing to having a Thunderbird supercharger on an m20b27i

[Ether-D]

I'm gonna remove and rebuild the head, or rebuild the head off of the 87 (parts car), but with new Febi rockers. If I have an extra $120 in addition to the $220 for Febis, I'll get IE heavy dutys. But I think the Febi ones will do fine. I'll likely have the valve guides replaced and valve seals too. I gotta see how much the machine shop wants for the works. If it's under $400 for the rockers and the head re-work and HG and bolts, I'll just have to do it I reckon.

The "while you're in there's" are starting. Timing belt…water pump…tensioner…seals…belts…gaskets…

[FLG]

That rocker is on the end, you might be able to just change that one out with the head attached. But like all the other guys...upgrade to beefier rockers if you decide to pull the head.

Its at the wrong end for that.

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[uturn]

That rocker is on the end, you might be able to just change that one out with the head attached. But like all the other guys...upgrade to beefier rockers if you decide to pull the head.

[TheTacoMan]

M20 was the same, disassemble outside the car.

[The Dark Side of Will]

Also, how many miles are on your engine? May need a new cam also. I had up to .011" worn down on the tips of the lobes of my M30 cam at 240ish thousand miles.

Not sure about the M20, but the M30 head can only be disassembled out of the car.

[TheTacoMan]

I was nearly 400hp with stock rockers, I have my old head which is minty 115k if you are interested. Will be selling soon. I would get hd rockers regardless if you rebuild it, they are not that much for peace of mind.

[The Dark Side of Will]

Oops... Yeah, weak and old is probably the culprit, as long as you had lash set correctly.

Horsepower or even RPM doesn't kill rocker arms... valve spring load and cam lobe ramp rates do. If you're on stock valvesprings and a stock cam, just replace it with a stocker.

HOWEVER, you may consider a NEW stocker instead of another part with an unknown history. Febi rockers for my M30 were reasonably priced, but I don't remember the exact amount right off.

[Ether-D]

Might want to further investigate. I'm on stock rockers at 330whp (soon to be 400 :-) )

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I think it was just weak and old. I'm gonna get a full set of new ones.

Sorry 007, nothing not on FB for now, but i made it public so it should work for anybody.

[DanDan007]

Any vids not on Facebook?


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[FLG]

Might want to further investigate. I'm on stock rockers at 330whp (soon to be 400 :-) )

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[Ether-D]

Time for a set of beefier rocker arms?

I think so. Those were a mix of used ones from 3 different heads.

[Court M3]

Just spent an hour reading this thread. Nice build and that last pic equals ouch!!

Time for a set of beefier rocker arms?

[Ether-D]

Nice bottom end giddy up

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Thanks bro. That's what I was shooting for. I don't reckon it'll be down for too long, as I have the extra car. But still, fuck.

[Ether-D]

Then about 50 miles later, this happened…
motherfuckshitballsucker!!!!!!

[FLG]

Nice bottom end giddy up

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