Awd car on rwd dyno?

[c_k06]

I have heard that it is possible to dyno an all wheel drive eclipse on a regular two wheel dyno. I need to dyno my car when I get done building it ant I no a great tuner but he has a single axle only dyno. Is there some way to dyno my car on this dyno? I have been told that I can take my front axles out and put some kind of plug in them but I don't think I trust just some guy telling me that. Need some wisdom here thanks for the help.

 

[dsm-onster]

Look up VCE (viscous coupler eliminator) or welded center differential.

 

[Nate_dogg]

I installed a vce, to put mine on a 2 wheel dyno, put down 365hp. It was fun to drive around in fwd mode for a while lot of spinning

oh and the vce install is pretty ez btw. good luck

 

[c_k06]

im sorry i should have specified i want to rwd dyno it if its possible. maybe i might even leave it like that for a while if i can

 

[Achelea]

A.) You can only do a 2wd Dyno if you have a welded center diff.
B.) You cannot do it to the RWD only. Our center diffs are NOT oriented the right direction to take such a modification. My buddy's talon stopped being able to move when he lost a front CV axle.
C.) Even if you get it on the dyno, you're not likely to get a reliable reading. If you try to lift the front, the center diff will send the power to the easier to turn wheels. the front wheels. TOo much and it cooks the center diff. Applying the brakes? Heats up pads, rotors, fluid, and yep, the center diff.

Your best bet is to take your friend a long stretch of Highway and do some low speed adjustments until you can get to a track to tune higher, out of the realm of Officer LONGARM.

>.> *Shrugs*

 

[dsm-onster]

A.) You can only do a 2wd Dyno if you have a welded center diff.

Or, a VCE.

im sorry i should have specified i want to rwd dyno it if its possible. maybe i might even leave it like that for a while if i can

You can run it in fwd mode on a rwd dyno. It's getting the power to only two wheels that is the hurdle.

 

[c_k06]

Your best bet is to take your friend a long stretch of Highway and do some low speed adjustments until you can get to a track to tune higher, out of the realm of Officer LONGARM.

>.> *Shrugs*[/QUOTE]

Ha I'll try. The guy who will tune it said we need to do the same thing. He's a beast at tuning. Well anyways I'll try to avoid officer Barney.

 

[twicks69]

To run a AWD car on a 2WD dyno, you will run it in FWD mode by pulling the 5th gear cover on the transmission after draining it, then installing a VCE (viscous coupler eliminator), a new snapring and the output shaft detent ball to retain the output shaft in the transmission.

Then, remove the transfer case, and ziptie up the driveshaft to keep it out of the way and placing the ziptie around the diameter of the driveshaft -- NOT through the u-joint as then you can move it onto the dyno -- this is only for VERY SHORT distances (i.e. a couple feet).

Dyno the car in FWD only. Then, drain and pull the 5th gear cover again, remove the snapring and VCE, then reinstall the viscous coupler and another new snapring, then reinstall the 5th cover, refill, and reinstall the transfer case and remove the ziptie from the driveshaft.

DO NOT KEEP THE VCE IN THE TRANSMISSION EVEN WITH THE TRANSFER CASE AND DRIVESHAFT INSTALLED! It is not designed to be street-driven with a VCE on a stock 2-spider center diff. You can ONLY run a VCE with a welded center diff on a permanent basis.

DO NOT FORGET TO HAVE THE OUTPUT SHAFT DETENT BALL INSTALLED! Also, ALWAYS USE A NEW VISCOUS COUPLER SNAPRING!

It is as easy as that. Takes around 30 minutes with the transmission in the car on a lift or on jackstands.

You are not going to run the car in RWD mode -- sorry. Not without moderate modifications that are unnecessary.

If the dumbasses who own the dyno insist on running your car in "RWD" on their dyno, go somewhere else -- they do not know what the hell a DSM is, nor do you want them touching YOUR car.

 

[c_k06]

Oh no no my tuner dosent want to do it. I just told him about it and he told me to get as much info as possible so we can make an informed decision. It looks like I'm not gonna mess with it and just leave it awd and tune on the road.

 

[ramsack]

i don't know anything about dynos but i would think that a "rwd" dyno is the same as "fwd" because both are just 2wd so i wouldn't think it would matter as long as you only have 2 wheels driven. it still gives you a higher reading that if you are awd so don't be disappointed that your car doesn't perform how a 2wd dyno would tell you it should.

 

[c_k06]

a "rwd" dyno is the same as "fwd" because both are just 2wd so i wouldn't think it would matter as long as you only have 2 wheels driven.QUOTE]

i know i just meant that i heard you could rwd and all wheel drive eclipse and i wanted to get some more info and opinions about it. a guy i know said "why dont you just pull the front cv axles and try that" i no that would tear it up so i just wanted to know more before i made a decision.

 

[Achelea]

a guy i know said "why dont you just pull the front cv axles and try that" i no that would tear it up so i just wanted to know more before i made a decision.

I love to reply to comments like that with,

"You gonna pay for repairs if it screws something up?" then I follow up by what it would tear up if you tried their idea. They generally back down after that.

 

[dsm-onster]

I just laugh and say, "This is not a 4wd truck. This has a viscous coupled center diff". And watch their gears turn trying to figure it out.

 

[c_k06]

ha yea i was like there is no way. i didnt know for sure but i didnt do it and then i figured that it would definalley be a bad idea. if someone else says to do it ill call them out on it.

 

[Achelea]

It's amazing how other people are so eager to tear up your stuff, right up til you want them to pay for it.

 

[c_k06]

ha yea