Dyno question?

[speed5hornet]

okay so i dont have a msp, but i have turbod p5 and im Hopefully gonna dyno it on sat (cross your fingers) and i was just wondering what gear ppl run there msp's in to get best numbers on the dyno. I believe 4th, but ive heard 3rd as well.... i tried a search and got skank for results. Also anything i should tell the guy thats gonna be driving my car while its on the dyno? Like what rpm to stop and push in the clutch?

 

[low_psi]

3rd gear, rev to 6500rpms.

I did a 3rd and 4th gear pull back to back with no change, so now I always use 3rd gear since its less stress on the motor.

 

[axisboldaslove]

probabyly 3rd gear would be the strongest as i know for a msp...probably the same for a p5....are you dynoing your car at ROCK FALLS on saturday?

 

[njaremka]

4th gear will be the most accurate

you want to dyno in the gear that will give the least amount of drivetrain loss, which usually ends up around 1:1 on the gearbox. in the protege, thats 4th.

 

[69RMSP]

yes 4th gear is more accurate but if your not tunning who cares if its off a tad.

less load ftw.

 

[greasemonkey524]

I had mine done in third also. I don't know if they're supposed to stop at a certain RPM but I know every pull they did mine they just let it hit the rev limiter.

 

[satyr36]

ouch rev limiter

 

[njaremka]

yes 4th gear is more accurate but if your not tunning who cares if its off a tad.

less load ftw.

then why get it dyno'd at all?

 

[fatti03msp]

isnt 3rd just under 1:1 and 4th is just over 1:1, but i also did 3rd and 4th and there where no differences at all in my numbers and rev limiter FTW i love hitting that sob in 1st gear lol.

 

[njaremka]

<table style="clear: left; width: 95%;" id="specs" class="stripedTable"><tbody><tr><td style="background-color: rgb(255, 255, 255);">First Gear Ratio 1) : </td><td style="background-color: rgb(255, 255, 255);">3.31 </td> </tr> <tr> <td style="background-color: rgb(239, 239, 239);">Second Gear Ratio 1) : </td><td style="background-color: rgb(239, 239, 239);">1.84 </td> </tr> <tr> <td style="background-color: rgb(255, 255, 255);">Third Gear Ratio 1) : </td><td style="background-color: rgb(255, 255, 255);">1.31 </td> </tr> <tr> <td style="background-color: rgb(239, 239, 239);">Fourth Gear Rato 1) : </td><td style="background-color: rgb(239, 239, 239);">0.97 </td> </tr> <tr> <td style="background-color: rgb(255, 255, 255);">Fifth Gear Ratio 1) : </td><td style="background-color: rgb(255, 255, 255);">0.76 </td></tr></tbody></table>

 

[satyr36]

isnt 3rd just under 1:1 and 4th is just over 1:1, but i also did 3rd and 4th and there where no differences at all in my numbers and rev limiter FTW i love hitting that sob in 1st gear lol.

lol

 

[fatti03msp]

just a lil mixed up thats all haha

 

[magnumP5]

Back when i first got the turbo done (see first line in sig) I went to a dyno and did three pulls - two in 4th and one in 3rd and there was essentially no difference. This was on a dynojet (all my dynos were) BTW. Because there was no difference I've always dyno'd in 3rd just to put less stress on the engine and transmission.

 

[DiscreetSpeed]

3rd gear, rev to 6500rpms.

I did a 3rd and 4th gear pull back to back with no change, so now I always use 3rd gear since its less stress on the motor.

Wrd.

 

[shane02pro5]

If tuning, another reason to do 4th is like my situation doing most of my tuning for high boost in 3rd since I can't really redline 4th to 125mph in many places. So I was running out of fuel by the top of 4th and try adding fuel. Then I'm going rich in 3rd and leaning out 4th. Took me a little while to figure this out since I didn't think I'd be close to maxing out my 565's!!

 

[69RMSP]

your values will only differ slighly, 4th gear creates more load so I suggest 3rd.

then why get it dyno'd at all?

 

[speed5hornet]

alright guys thanks a lot, my plan is 3rd gear and 6500 rpms. Although i just had surgery this morning, and even though the car should be done at pg in time for the dyno at nagel autobody 3min from my house i dont think i will be able to pick the car up or drive while im on 5mg of Hydrocodone/500mg of apa....dang it!

 

[speed5hornet]

oh btw it is a dynojet

 

[69RMSP]

i dont think i will be able to pick the car up or drive while im on 5mg of Hydrocodone/500mg of apa....dang it!

manup

 

[kamon8404]

manup

+1. You can operate the vehicle safely under those conditions. Did you have your wisdom teeth removed?