I have been reading some posts about what guys are dyno'ing with their trucks. I've noticed that some trucks with the same or similar injectors and no box are running real close to the numbers I made (330/782) Now I realize that the Banks Big Hoss (level 5) is not that aggressive, but it does tap the wire and seems like I should see more than I did. Is my wire tap loose? I plan to go to a COMP , but I want to make sure this setup is what it should be power wise. It sure seems to be low. Can anybody else post their dyno numbers with just injectors?

 

What gear did you make your pulls in? I ran about 320/650 in 5th but 347/762 in 6th with DD2s and an EZ.

Rusty

 

Pulls were made in 5th.

 

Get rid of the banks power pack.

 

That's the plan, but I want to make sure there isn't something else wrong with the truck.

 

i dynoed 100 plus more tq with the truck in 5th over 4th gear. i suggest you try it in 6th and see what you have.

 

My brother(02 H.O. 4x4 QC SB) dynoed 330 rwhp with just an Edge Comp. After the DD3's, South Bend Con OFE and HTB2(I think) he was over 400...

 

I have always read and been told that you want to be 1:1 on the dyno for the most accurate results. Is this not true. The shop i go to always runs them 1:1, 5th gear in my case. What is the standard then to comparing dyno numbers??

 

ever where i have dynoed used the highest gear they had. i have heard that once you are over 500 hp that you will get bigger #s in 1 to 1 compared to over drive. i will be able to try that out here real soon.

 

I tried it both ways. 2 pulls in 5th yielded ~320 RWHP/650 lb-ft. 2 pulls in 6th yielded 347 RWHP/762 lb-ft. Part of that might be attributable to my truck's 4.10 gears, but the longer time it took to make a 6th gear pull provided more time for the turbo to spool and minimized the effect of engine speed-related drivetrain inertia versus dyno drum inertia.

Think of it the other way - what kind of numbers do you think the truck would produce in 1st? It would hardly know the drum was there as it accelerated to redline!

Rusty

 

about a year and a half ago i had mine on the dyno, i told them to do one run in 4th and the other2 in 5th. the 4th gear run was 381.8 hp with 804 tq. the 5th gear run was 398.5 and 917.7 tq. not much mor ehp but a good bit more tq.

 

Where in the RPM range are you guys starting the run??? 1200?? 1500??

I'll be dynoing in a few weeks, and I would think that you'd need to start the run at 1200 to get the same results as on the street (that's where I end up after I shift), but I don't know how well the dyno will spool the turbo at those low RPM.

Chris

 

May be a little different, for you having 5spd, but here is what Aron had me do.

O/D locked out. Run up to 45mph, or so, to lock the T/C while in 3rd gear (I don't have the switch). Come back down to ~30mph, then, when he said "GO!", hammer down, up to the top speed that was set in the computer. Or 'til your EGT's get to the point where you want to back out.

This was on a Mustang dyno.

 

the way we dyno with a manual is to slowly shift through the gears until you reach the gear you're going to dyno in... then let the rpms drop to about 1200 and "cruise" there for a bit... when the operator says go, hammer down and let the smoke fly...

 

I got 390/918 in 6th on a dynojet.

I got 350/904 in 5th on a Superflow.

jlh