From knowing nothing to having a Thunderbird supercharger on an m20b27i

[Ether-D]

It won't be long.

I got the head off my parts car and the thing is completely original. All rockers are date stamped 86. All original head bolts, pre recall. The parts car is an 87. Was Elring the original HG manufacturer? Nice cross-hatching in the cylinders. There is almost zero wear on the cam lobes. So I'm gonna take all the rockers from the 87 and put them in the Supervert. Just for the summer while I build the 2.8 out of the block from the 87.

[Q5Quint]

Sorry about your rocker- I try to keep my old head below 5500 to attempt and prevent this, and pull more timing more than I should above 5500.

I am trying to find a log of my turbo car idling but cant seem to find one. During some runs it look like my mat temps were at 80-90F and then would spike over 100 after a few pulls. Around 100 or below seemed normal, so if you are hitting 150 heat soaking that is pretty woah, also considering you are not sucking air through a spinny blade attached to your hot exhaust.

Ambient here doesn't get over 80F usually, so I was quite happy with my gigantic intercooler and 80-100F temps.

Also make sure your IAT sensor is calibrated correctly, ie ambient actually reads ambient.

GL sir and I hope we see her back on the streets soon.

[Ether-D]

"Sitting there idling" could be heat soak & pulling radiator air too.

Ditto on "get more data"

Definitely heat soak.

[The Dark Side of Will]

"Sitting there idling" could be heat soak & pulling radiator air too.

Ditto on "get more data"

[Ether-D]

I will do that Taco. But keep in mind guys, that the intercooler is not functioning at all. After I get the intercooler functioning I'll hook a laptop to it so I can data log and observe while driving. If the temps are still high, I'll consider the meth.

BTdubs, those intake temps were after I'd been revving it and whatnot for 15 minutes. It was completely up to operating temp. And non functional intercooler (no liquid in it or pump to pump it).

And my tune starts pulling back timing at 130.

[TheTacoMan]

I would get some readings of before and after for science, 150 at idle is very hot. On my old setup turbo with meth, I was at 115 F WOT, you may want to consider meth for longevity and if you can get those intake temperatures lower it means more power. If you are at 150 at idle I wouldn't be surprised to see WOT above 180 which robs hp, colder air= denser air.


EDIT: Daggit you beat me to it.

[kamotors]

150degrees at idle is insanely hot, most turbo cars start pulling a lot of timing at 120degrees(like wrx's for example).
get some meth or something in there. for example a turbo E30 at 20psi runs 120degree air at 7k WOT and close to ambient cruising.

[Ether-D]

^ no idea. When it's sitting idling in the driveway with the desktop hooked to it, it gets up to 150-160 ish. I haven't driven it with a laptop hooked so I don't know what the temps are while driving. The intercooler isn't hooked up yet (I haven't run the hose and pump electronics). I can tell that it backs the timing off when I've been beating on it, so I figure the IATemps are getting up there when I get up in it some.

[TheTacoMan]

What are your iat values right now?

[Ether-D]

I have it at 6psi with the big pulley. I reckon it'll be 8-10 psi with the small 5% overdrive pulley that came with my m90.

[kamotors]

I must of missed it, but how much boost?

[Ether-D]

The cam has to be pulled all the way out first. If it was a rocker from like cylinder 6 it would be easier and wouldn't require head removal or fancy cutting and maneuvering to get the cam to slide out with head on

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Nope, the rocker shaft can come out with the cam in place. I've done it before. It comes straight out the front after the radiator and condenser are moved.

[Ether-D]

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.

200k on the car, but this is an unknown junkyard motor (out of a 1992 vert) with a head that I hand lapped the valves on and put new valve seals, but left the guides alone.

I had been wanting to do a 2.8 stroker build on the block I have on the engine stand in the shop. That's what I need to do. I replace the one bad rocker, and build the 2.8 in the shop the swap it in. 2.8 supercharged. Mmmm, that sounds nice...

[FLG]

The cam has to be pulled all the way out first. If it was a rocker from like cylinder 6 it would be easier and wouldn't require head removal or fancy cutting and maneuvering to get the cam to slide out with head on

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[Ether-D]

Its at the wrong end for that.

Sent from my SCH-I545 using Tapatalk 2

Well, I could do it with the head attached, I'd just have to take the exhaust rocker all the way out. Boy that sounds much better than all that head work jazz. Maybe I just do that for now while I build the other head. Decisions.