M42 turbo

[fumstoo]

yeah....   The tags expired two days ago and im not buying new ones till I do a bunch of chassis work. bushings, meth, new coilovers, steering components, brakes, and finish my exhaust. maybe i should just finish it all while i cant drive it... 

[wazzu70]

Thats what I said almost two years ago! Car hasnt moved since! I finally just had to stop expanding the list of stuff to do so I can drive the dang thing

[fumstoo]

Heres a question. I have IE poly motor mounts, Condor poly trans mounts and a revshift guibo. Im pretty positive my drivetrain is aligned correctly but i get some vibration and lots of noise when the cars under load. Could it be that theres no flex in the drivetrain at all? And is there a way to make sure my drive train is aligned properly?

[318is91turbo]

dont take my word on this. i just wanted to toss out my thought. cause im pretty sure i remember reading a thread, that its in the transmission and theres nothing you can do about it except get a newer better balanced tranny. but i could be terribly wrong. its what came to mind when i read it.

[wazzu70]

Thats incorrect, the transmission is not the problem.

The trans and motor mounts will transmit a ton of vibration into the frame at lower RPM, which I am sure you feel. I had poly motor mounts and I couldn't stand them. At idle and low RPM it felt like the car would rattle apart!

At higher speeds your issue most likely comes from the Revshift guibo. The guibo is not a proper design because the poly is too rigid and the part needs to flex by design. If you do some searching you will find almost everyone who ditches that guibo is much happier without it!

This is assuming though your CSB is in good shape and your driveshaft is properly balanced.

I would replace your CSB and guibo and see if that helps.

[fumstoo]

Under 1300 miles on the driveshaft since it was rebuilt. I ordered an oem guibo yesterday so hopefully its my problem. Ive got a few new toys on the way as well If nothing else goes wrong(LOL!) ill have some big updates soon

[fumstoo]

Figured id update here too. BW s200sx 56mm. .64 turbine house. meths being installed as well. Going back to school so ill be juggling full time work and school along with the build.

[Slowered318]

Nice snail. 

I may jump on the boosted bandwagon this winter.

[fumstoo]

Jump on it! Theres been a lot more boosted m42s popping up and im loving it 

[fumstoo]

http://www.youtube.com/watch?v=VjYQr76118o

[fumstoo]

Does anyone have screenshots of the stock motronic maps? or any m42 base maps

[Tgoode318]

fumstoo did replacing your revshift guibo fix your problem? I was going to order one but was steered clear by a number of people who said it was to much trouble for little gain.

[wazzu70]

Are you trying to tune motroinc or a standalone? I have standalone maps for a stockish motor that could help establish a baseline if thats what you are looking for.

[fumstoo]

Those would be perfect! Im tuning an electromotive tecgt.

[fumstoo]

fumstoo did replacing your revshift guibo fix your problem? I was going to order one but was steered clear by a number of people who said it was to much trouble for little gain.

Sorry I missed this. Yes, it solved the problem.

 Spring break starts Friday so hopefully I can buy some more plugs and get some tuning done.