2 Wheel Dyno

Splinter · Post by **Splinter** » Sun Mar 12, 2006 9:32 pm

Unfortunally, the only 4 wheel dyno is quite a trek from here. The shop where Im going to be doing my build only has a 2-wheel, so Im wondering if there's any *safe* way to dyno our cars on a 2wd dyno?

Disconnect the driveshaft?
FWD fuse? (apparently this puts strain on the diff?)
Disconnect the axels?

I know its not going to be accurate, but its mostly to see if the car is running well, and for tuning. I'll take it up to the 4WD place once the basic tuning is done.

Manarius · Post by **Manarius** » Sun Mar 12, 2006 9:58 pm

FWD fuse...but you're not supposed to be driving the car hard on FWD.

Splinter · Post by **Splinter** » Sun Mar 12, 2006 10:01 pm

Yea I dont want to do anything thats going to damage the car

LaureltheQueen · Post by **LaureltheQueen** » Mon Mar 13, 2006 1:31 am

then don't put it on a 2 wheel dyno.

Splinter · Post by **Splinter** » Mon Mar 13, 2006 1:51 am

Well that's my question, Laurel. Is there any way to do it without damaging the car. I don't think I could have stated it much more clearly.

If the answer is no, then it's no.

Manarius · Post by **Manarius** » Mon Mar 13, 2006 3:18 am

Splinter wrote:If the answer is no, then it's no.

Well then simply, the answer is no. You have a AWD car, and it wasn't meant to be tested on a 2WD dyno.

Besides, why waste the WHP of those other two wheels. And...I don't know if I'd want to use a dyno as a method of tuning. There have to be better methods.

Splinter · Post by **Splinter** » Mon Mar 13, 2006 3:25 am

This is why I'd waste the extra WHP

$200-$300 in travel expense alone.

Looks like for tuning, it's gonna be a lot of highway pulls at 4am

Richard · Post by **Richard** » Mon Mar 13, 2006 5:07 am

13 hours? F^ that! Get a g-tech and be happy with that.

Splinter · Post by **Splinter** » Mon Mar 13, 2006 5:27 am

Well the Autronics SMC that Im putting on will give live horsepower/torque ratings, but the initial setup would really go a lot smoother in a controlled environment, vs flying down the highway at 60mph trying to look at readings on an 8" screen

555BCTurbo · Post by **555BCTurbo** » Mon Mar 13, 2006 7:09 am

How the HELL does it take 13 hours to go 211 km??!?!?!?!

btw...get a wideband O2...it is pretty much vital for tuning

jnorion · Post by **jnorion** » Mon Mar 13, 2006 7:22 am

How about jackstands on the dyno?

Splinter · Post by **Splinter** » Mon Mar 13, 2006 7:42 am

555BCTurbo wrote:How the HELL does it take 13 hours to go 211 km??!?!?!?!

There's an ocean, a mountain range and a major metropolitan center in the way.

legacy92ej22t · Post by **legacy92ej22t** » Mon Mar 13, 2006 2:01 pm

A good street tune is better then a dyno tune anyways.

Post by **Legacy777** » Mon Mar 13, 2006 7:28 pm

I know some people that have inserted the FWD fuse and dyno'd the car on a 2-wheel dyno.

I wouldn't recommend you do that....but it has been done.

Post by **DLC** » Mon Mar 13, 2006 7:48 pm

Swap in a 5MT FWD tranny

wiscon_mark · Post by **wiscon_mark** » Tue Mar 14, 2006 2:19 am

MCarp22 on Nasioc did the FWD fuse thingy...on a mustang dyno...my heart is too sad to give you the results

Kelly · Post by **Kelly** » Tue Mar 14, 2006 8:20 am

legacy92ej22t wrote:A good street tune is better then a dyno tune anyways.

ditto.

Splinter · Post by **Splinter** » Tue Mar 14, 2006 9:17 am

rallitektech wrote:
legacy92ej22t wrote:A good street tune is better then a dyno tune anyways.
ditto.

Kelly, you were running an SMC, right?

Can you give me a run down on what components you were using with it, and a copy of your map?

Penguin · Post by **Penguin** » Thu Mar 16, 2006 4:29 pm

I am with DLC a 5speed 2wd swap would only take like 2 or 3 hours

and they are cheeeeep so slam the gears and not care

BAC5.2 · Post by **BAC5.2** » Thu Mar 16, 2006 4:42 pm

DLC wrote:Swap in a 5MT FWD tranny

We just completed a 5-speed, Front-wheel-drive, straight cut dogbox.

wiscon_mark · Post by **wiscon_mark** » Fri Mar 17, 2006 12:17 am

seriously, who wants FWD?

Splinter · Post by **Splinter** » Fri Mar 17, 2006 2:10 am

wiscon_mark wrote:seriously, who wants FWD?

+1

I'd rather spend a day driving out to the 4WD than switch to a FWD tranny

Penguin · Post by **Penguin** » Fri Mar 17, 2006 3:45 pm

correct me if i am wrong but....

wouldn't you get a higher WHEEL horsepower number?

and the words "bake show" come to mind. you could just melt those poor tires.

AND want to drop about 200 pounds go from AWDauto to FWD5speed

wiscon_mark · Post by **wiscon_mark** » Fri Mar 17, 2006 3:47 pm

no, you probably wouldn't get a higher readng...at least MCarp22 over on Nasioc didn't...82 whp on the dyno with the fuse in. I just don't think the fuse thing is meant to transfer all the power to the front diff, it's really not made for normal use.

Penguin · Post by **Penguin** » Sat Mar 18, 2006 7:16 am

I agree,... if you put a fuse in the FWD plug in your AWD engine bay you will get NO GAIN if anything you get LESS power

i think mark misunderstood me,

If you have a 22t AWD AUTO and put it on an allwheel dyno you get "X" as you WHEEL horsepower number.
If you have a 22t FWD 5 speed and put it on a 2 wheel dyno you get a number GREATER then "X" as you WHEEL horsepower number

a?

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2 Wheel Dyno

2 Wheel Dyno