Kamotors E30-Turbo to ITB M20

[Bimmer_man]

Are you getting a mls head gasket?

[kamotors]

Are you getting a mls head gasket?

nope, never needed one, I have personally only blown 1 headgasket on my E30 and it was the 25psi block cracking incident; I was experimenting with the meth and was nearing 30degrees timing advance; I believe I was around 28 degrees advance and 25psi on the gt35 and making gobs of power.

but the funny thing that most dont realize, i drove well over 5k miles on that cracked block.

Matt Farah reviewed the car on the cracked block, I drove 900 miles down to L.A on the cracked block, plus all the auto-x fun.

M20 was a trooper lol, entire oil pan was mud when I pulled it apart after returning home from bimmerfest. It drank over a gallon of coolant on the trip home from b-fest and was still making excellent power at 19psi AND averaged over 20mpg no problem.

It was just constantly getting worse and the the bimmerfest trip is what made me remove the M20 as the cracks had gotten too bad.

[Bimmer_man]

Damn dude that's one hell of a story man. Well good luck with it man. I can't wait to see what this car will be capable of and would be nice to see what a itb set up would do on a turbo set up.

[ThatOneEuroE30]

Ahh I see. Curious to see how you make the plenum after auto x

[kamotors]

So heres just about finished head valves adjusted and the double checked.

Also discovered megasquirt has a specific ITB mode, it blends alpha n with speed density. Ill be setting up a vacuum block to tie all cylinders together and try to get a signal that can be used around idle range. Doesnt hurt to try ive heard I can get a somewhat stable signal with map sensor reading off of the vac. block. Worth a shot, nothing lost if it doesn't get stable signal

Something like this.

[tinkerputzer]

You'll want to double check the valve clearances once the head is torqued down. They always change in my experience.

[Bullet Ride]

Also discovered megasquirt has a specific ITB mode, it blends alpha n with speed density. Ill be setting up a vacuum block to tie all cylinders together and try to get a signal that can be used around idle range. Doesnt hurt to try ive heard I can get a somewhat stable signal with map sensor reading off of the vac. block. Worth a shot, nothing lost if it doesn't get stable signal

You should be able to get a stable map signal with a vacuum manifold. FWIW I tuned my ITBs off the map signal and ran the car all last summer off of it because of a TPS signal noise issue I have yet to sort out. I was able to get it running pretty good.

Alpha-n or the hybrid map/alpha-n is definitely ideal though.

[digger]

How is the switch over point defined? By load, rpm or both? I’ve always wondered how a blended setup works, if you use MAP for low load and idle and then TPS for higher loads wont they try and use the same cell in the table and there be a conflict? at idle on MAP you willl likely be idling at say 900rpm and 60%-70% load, but with a tps map you will be at 0 load

[digger]

You should be able to get a stable map signal with a vacuum manifold. FWIW I tuned my ITBs off the map signal and ran the car all last summer off of it because of a TPS signal noise issue I have yet to sort out. I was able to get it running pretty good.

Alpha-n or the hybrid map/alpha-n is definitely ideal though.

im looking at a hall effect TPS which has better signal to noise ratio and drifts less with temperature. my TPS seem to go bad after a few months, they must use the low load part of the track excessively which wears and creates an erratic signal. it still drives ok but mixtures arent as consistent as i would like at very low loads

[kamotors]

Head installed.

[jareddavidj]

Can't wait to hear it:)

[kamotors]

Discovered I was sent a cork oil pan gasket should I keep it, or buy a paper gasket?

[Bimmer_man]

I don't see anything wrong with the cork one I'd just use it. It's what I have that came in my bottom end kit.

If it really worries you, you can use a tube of sealer on both the pan and black and sandwich the cork gasket between the two. My brother dose that with a lot of gaskets. He's a master mechanic and has been for like 10 years.

[ThatOneEuroE30]

Ditch them both and get some rtv sealant and never do the gasket again

[Bimmer_man]

Haha or that, that works too haha.