Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Joseph Davis]

you don't have to worry about the differences in strapping tensions affecting your results.

What have you used where that was a concern?

[Evolution]

Tell you the truth i've never actually experienced it myself, nor have I ever tested the myth but, it was somthing that I was told when I was learning to dyno cars.

[dvst8r]

Can someone fill me in on this strapping tension idea?

Most of the dynoing I do is with trucks that make anywhere from 1000-2000ft lbs of torque. Wheel spin is always a battle, and as such people goto some pretty extreme strapping measures to keep it to a minimum.

After seeing this thread, I have someone that is quite serious about buying one of these, just for the no possibility of wheel spin aspect. Obviously it is a little slower to switch out vehicles on a dyno day, but to be able to get accurate and repeatable runs on hard hitting twin, and nitrous trucks, would be well worth the time wasted. 

[Joseph Davis]

I can see where it would amplify parasitic drag and make a marginal difference, but I've never seen it manifest in any noticeable manner myself.   Most of the times in my experience that a vehicle's been restrapped or had straps added were due to FWD traction issues at the 600+ level and I never saw any indication of such a thing happening.  It is plausable that a NA vehicle would suffer such, though, but I've not fooled with it to know.

[dvst8r]

Good to know. For most of the guys I deal with, if it is repeatable with in + or - 5hp, they are more then happy. It is when they make 600hp hit it with a 300shot, and blow the tires off and make 633hp, that piss's them off. As such they all love DJ's...  as it is rare to spin the tires on one.

[Evolution]

I hate to sound like a Dynocom salesman but on their roller dyno's they have huge machined knurles in them that makes it almost impossible to spin the tires on.

[Joseph Davis]

I hate to sound like a Dynocom salesman but on their roller dyno's they have huge machined knurles in them that makes it almost impossible to spin the tires on.

All dyno reps say that, no matter how honest or straightforward they are sales types not sworn in on the witness stand with the best interest of society in their hearts.  That's why I spent all that time talking to actual dyno owners.

100 shot + VTEC = failure


Good kind sir, get one of the reps to put a grand down on the wheelspin conjecture and I will bring a half dozen cars that rip the tires free repeatedly.  We will run a train on those bitches and split the money.

 I have broken traction on:

DynoCOM
Dynojet 224x
Mustang MD-750
Mustang MD-1100SE
Mustang 500

Edit: Oh, yeah, Dyno Dynamics.

[jabberwock]

@GUMMYBEAYUH
http://en.wikipedia.org/wiki/Pontiac_Grand_Am#1999.E2.80.932005
vs
http://en.wikipedia.org/wiki/Honda_S2000#Specifications

I see 155 vs 153 (2.4 vs 2.0) and 162 for the 2.2... so... ?




YouTube won't let me post a comment...

[Crackdown]

I hate to sound like a Dynocom salesman but on their roller dyno's they have huge machined knurles in them that makes it almost impossible to spin the tires on.

I shared a shop with a brand new mustang 1100SE for a couple years, the knurling was good, but with enough power we manged to get slippage, even when we had to break out the chains and pull the vehicle down vertically.

[Gold DA9]

got to tell my friend about this. He is trying to decide what dyno to purchase..

[Joseph Davis]

Where do you live again, Mister Z?

[mrgreengenes]

Where do you live again, Mister Z?

Is that a Frank Zappa reference by chance?

Near Vancouver BC

Phil

[Joseph Davis]

Gold DA9 = Zach or Zack.  I couldn't remember the exact spelling, so I called him Mr. Z.

[chris]

Hows everything working out?

[Evolution]

Hows everything working out?

We had one issue with the hand held controller but other than that everything has been working well.

[Joseph Davis]

What one issue?

[Evolution]

The handheld controller stopped working, we were still able to use the dyno just more of a PITA. From the time that we broke the remote to the time we sent ours out and had it back was 3 days.

[Joseph Davis]

Sweet.  Shit happens with anything you biy, glad to hear you got quality service.