M42 turbo fact thread

[anthonymax007]

Whoa. So no working windshield wipers?

[wazzu70]

Windshield wipers still work without a reserivor. You just can't spray liquid on the windshield.

[Northern]

Grab an ix washer reservoir, or just mount a custom one in the battery tray. Not sure which 4 banger cars have the battery up front though.

[anthonymax007]

Grab an ix washer reservoir, or just mount a custom one in the battery tray. Not sure which 4 banger cars have the battery up front though.

Thanks for the info. I knew there had to be a way to keep them working, and yea, I'm of the camp that sprays his windshield if its gets dirty while driving. Unless everyone else has special eagle eyes that can burn through that shizzz.

[jntar]

Can we get a base (close to stock) ignition map posted? Here is mine, users be warned it may not be a good map for you.

[jntar]

What kind of vacuum numbers are you guys getting at idle? Im at 15psi of vacuum and cant get any more than that.

[MF DOOM]

I recall 16-17ish

[jntar]

I recall 16-17ish

Cool, I'm not going to worry about attempting to gain more.

[ccsdo5]

Does anyone happen to know what the installed valve spring height should be on vac springs? I need to start putting this head together and finish my engine. I thought they came with a sheet but I might have misplaced it..

[jntar]

You're probably going to have to call VAC.

[econti]

I plan to into turbo sometime soon, and I have a couple questions.

I'm going to be shooting for 250hp with a focus on response. Someone I know who does turbo setups for a living recommended the GT2554, and if that doesn't quite do the job then I can step up to the GT2560R.

I'm reasonably keen on overboring, which means custom pistons, which means I'll probably change compression to around 10:1. Yeah I know that I could just fit a thicker head gasket but if I'm going to overbore then why not do it properly.

What are the rods like? Fine for 250hp with abuse, or for peace of mind should I go aftermarket forgies?

Where do you tap oil lines and such?

-edit-
And for cams, is the stock overlap alright? Or will a regrind/turbo specific cam be needed

[wazzu70]

For that power level stock rods and cams should be fine. Stock compression os 10:1...or does OZ have a different spec?

The turbos you mentioned should do the trick and be readily available on the used market there.

[jntar]

Finally getting around to installing an intake temperature sensor. On the AFM harness pin 4 and pin 5 are for temp. Pin 77 on the DME is the IAT sensor input.

Does anyone know for sure if pin 4 or 5 on the AFM lead to 77 on the DME? I'm trying to not hack up my harness. I have a plug extension for the AFM I am going to cut and wire in. Ive been digging through the bentley manual and electric troubleshooting guide for the last hour. I'll keep going, but if someone already knows it would help :)

Think I figured it out: http://www.r3vlimited.com/board/show...7&postcount=98

[wazzu70]

Yes, that image shows what pins on the AFM are for the IAT sensor.

[varg]

What's everyone here torquing their ARP head studs to?