QUAIFE! (was Fiberglass Hoods)

[nealtovsen@yahoo.com (Neal Tovsen)]

Something doesn't jive here. The whole point of a Quaife is to more
effectively put the power to the ground, right? How could a dyno show LESS
power with a Quaife? Theoretically, it should only show more if you were
getting wheelspin on the dyno rollers before, but it certainly shouldn't be
less! There are three explanations:

The Quaife materially increases drivetrain losses. It isn't a viscous unit
or a clutch unit...it's all gears, so that rules out mechanical losses. The
only way I see this happening is if it weighs a lot more than the stock
diff. Does it? My tranny came with a Quaife. I've lifted it plenty (still
getting shoved around the garage since it isn't in the car), but I haven't
lifted a non-Quaife tranny in a while.

The dyno was mis-calibrated, or you used two different brand dynos.

The environment variables (temp, humidity, etc.) were different.

I'm inclined to believe #2 or #3 a long time before #1. #2 is a big
possibility if you tested on a different dyno the second time. I've heard
the different brands can make a big difference.

Neal

> -----Original Message-----
> From: scirocco-l-admin@scirocco.org
> [mailto:scirocco-l-admin@scirocco.org]On Behalf Of Shawn C Meze
> Sent: Monday, January 21, 2002 9:14 PM
> To: rept@qwest.net
> Cc: scirocco-L@scirocco.org
> Subject: Re: QUAIFE! (was Fiberglass Hoods)
>
>
>
> On Mon, 21 Jan 2002 08:42:29 -0500 "Mike Blain"
> <rept@qwest.net> writes:
> >It's just as good as increasing your HP! You'll be faster than those
> >without it.
>
>
> Something interesting that Potterman and I have discovered. I
> dyno'd my
> roc a few months back to discover that I made less power with a
> completely "built to the limit of the rules" FSP motor than I
> did when it
> was bone stock with 70+K and no quaife.
>
> Yesterday Potterman dyno'd his Roc and found the same thing
> compared to
> the last time he dyno'd the car. Its had alot of improvements
> and we both
> say its got more power than it did before. The only thing
> different from
> the before and after dyno'd was the addition of the Quaife. The other
> mods would surely have added Some power, yet they showed a loss of.
>
> Hmm, thinking about it, seems that your splitting the usable power to
> both wheels which seems to cause a dyno run to show less
> overall power.
>
> Interesting. Were tempted to put in stock trannies and do back to back
> testing. I know ill be dynoing the 84 Roc with the 4K as soon as I get
> the new diff kit cones. It would be interesting to see how my numbers
> compare to Mikes.
>
> Dont get me wrong, I love my Quaife and want one in all my VDub's.
>
>
> Shawn Méze
> 86' Jetta GLi 8V     84' Scirocco 8V    88' Corvette -SS 30- 2001 SDR
> Solo2 Champion
> 82' Scirocco GTi -FSP 54-     79' "Project FSP Scirocco"
> The Fastest, Quickest, Cleanest and best looking Scirocco(s) in all of
> San Diego!
> http://www.Geocities.com/MotorCity/Speedway/1308/index.htm
>
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