Convert To FWD For Dyno?

[slowgsr]

Hi, I Just have a quick and easy question.

Can i convert my 90 TSi To FWD For Dyno tuning purpose ONLY, then back to RWD, Im looking for a very quick and simple way.. IE pulling the driveshaft?

If this is a stupid question, please dont break my balls about it, im ignorant. Just curious since there is only one AWD dyno around here and tuning is booked up and very costly.

Or is it possible to convert just for dyno tuning? And if so (easily) whats involved with it.

Thanks!

Again.. This may be the dumbest question you have ever seen in your life, just tell me in a nice way .

 

[1stgendon]

If you take the drive shaft out fluid is probably gonna go all over. I'm not sure if they make a dummy shaft for this to keep the fluid in. If i can figure a way out for you i will. I guess these cars don't have any kind of selectable transfer case.

 

[firefightermdc]

why would you want to do this anyway? you wouldn't get a true representation of your dyno numbers b/c there will be drivetrain loss to the rear wheels.

 

[GVR4592]

A dyno isn't for getting high horsepower numbers it's for doing comparisions and for tuning, it doesn't matter if he dyno's in fwd, awd, or rwd.

 

[skeeter4200]

Ive thought about doing this too, but then I figured that this wouldn't tell me the true numbers that I was going for. Just wait it out dish out the extra cash and do it the right way you will be happier that way

 

[dsmconvict]

What about the mad tyte JDM beatentodeath selectable t-case yo. Lol or is that not an option for 90's?

 

[c4uldr0n]

You could do the Viscous Coupler Eliminator + disconnect the center drive shaft / transfer case. I would recommend going to an AWD dyno though, less hassle, less mess.

 

[Boost92awd]

To the OP, what do you have for mods? If you have link you could probally just get away with tuning with the link.
You can get a pretty solid tune with link.

I see you live in Canada, how far is the closest AWD dyno?

 

[SOADweskey]

GENUINE MITSUBISHI TRANSMISSION PARTS
The Viscous Coupling Eliminator is the third item up from the bottom of the page. I also agree that street tuning until it is close is an easier option. Once you have your tune dialed pretty good then take it to a proper AWD dyno so you don't have to open your trans.

 

[CompuBob_TSi]

you will have to either weld your center differential, or get a VCE as stated above, then you can remove the driveshaft or the whole transfer case, because you might loose fluid with just the end of it open. if you go rear wheel drive, then you will have to remove the axles, but keep the ends in the transmission and also keep the other ends in the wheel hubs. so you will have to hack up a set of front axles for this to work.

 

[99gst_racer]

slowgsr - Buy and install a VCE (like in post #10). Then remove your driveshaft and t-case. This shouldn't take more than a hour in an average garage. This will make your car a FWD, and you will be able to drive to a 2WD dyno.

After you're finished, remove your VCE and reinstall your viscous coupling, driveshaft, and t-case and you're all set.

Anybody running a welded center differential won't need a VCE, but will still need to drop the t-case and driveshaft.

A dyno isn't for getting high horsepower numbers it's for doing comparisons and for tuning, it doesn't matter if he dyno's in fwd, awd, or rwd.

I agree.

Dyno's are for comparing gains and losses and for tuning. It's much more safe and accurate then doing 3rd gear pulls on a back road using the butt dyno for measurement.

 

[GVR4592]

Paul, do you think there would be any issues using a vce on a high horsepower car on a dyno?

 

[c4uldr0n]

Paul, do you think there would be any issues using a vce on a high horsepower car on a dyno?

On a two spider diff w/ rear wheel drive only... I think there could be some issues

 

[99gst_racer]

Paul, do you think there would be any issues using a vce on a high horsepower car on a dyno?

I can't say that I know from experience (I have a welded center, so I have no need for the VCE), but I would have to assume that a welded VCE is just as reliable as a welded center differential. As long as it's done correctly, the weld should hold and it should perform fine.

 

[slowgsr]

To the OP, what do you have for mods? If you have link you could probally just get away with tuning with the link.
You can get a pretty solid tune with link.

I see you live in Canada, how far is the closest AWD dyno?

Tuning will be done with AEM EMS, using their IAT and 3.5bar.

Doing 4th gear pulls down the highway isn't an option for doing the WOT portion of the street tuning, My tuner wont tune this way, and i wont drive the car this way. In Ontario we have very tough speeding laws, if you get caught going 50km/h over you get roadside suspention and roadside towing of your veichle, not worth the risk IMO.

Thanks for the method using the VCE, It dosent seem like it would be too much work either, saying it will take an hour in an average garage, I have a decent size garage at home, and we just installed a 7000lb hoist yesterday so i shouldnt have any problems .

Just curious if anyone on here has actually installed a VCE for FWD dyno tuning purposes, Im looking for around 450whp, i shouldnt have any problems achieving this using the VCE, IE. Its a strong part that isnt going to be destroyed on this HP level.. Just curious. (again if this is a stupid question excuse my ignorance)

Thanks everyone. This is good news as far as im concerned.

 

[tsiawd1996]

i tune mine i took off my transfer case and nothing happened

 

[99gst_racer]

i tune mine i took off my transfer case and nothing happened

That's a good way to burn up your viscous coupling.

 

[c4uldr0n]

i tune mine i took off my transfer case and nothing happened

 

[GimpinVR4]

Wouldn't it be easier to remove the rear axles and dyno FWD?