In answer to Al and Andrew both..My target rpm for a TDI re-gear is 3000
rpm..Seems to be a good compromise between torque, HP and drivability. Do
some with a 1.09 - 3rd or a .77-4th, but do most with the 1.14 and .70 to go
with our US 4.86 R&P.
I do the Greasewrks rebuilds and I frequently chat with the customer as well
as Justin to figure tire size, weight and general driving preferences. Yes,
they will pull from 2K, but on the highway you run out of pure torque so to
speak and need some eng speed HP to even out the gearing..Might not be the
best way to put it, but I call it "momentum RPM" and it seems to work from
the guys I talk with after the fact.
As always, everyone has differing needs and wants..Al Pokes along in the
slow lane and Eric Didier is NEVER in the slow lane..And of late, I am
somewhere in the middle starting to watch the poppies go by (not pushing the
Daisies..yet)..

Daryl of AA Transaxle
425-788-4070
"On the cutting edge of Old technology"

What is your opinion on a good superslab rpm for the modern TDI?  3000?

In my doddering old poppy watching driving style, I rarely push it past
70mph usually just wobble along at a comfortable 65 (avoids those annoying
little pieces of paper that say summons on em)  As we know my current
gearing is 5.43 with 215/75-15.  with a .77 4th.  After all it is a 5000lb
truck.

Al
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Andrew Grebneff
Sent: Wednesday, January 13, 2010 6:28 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: FS: '90 wolfsburg Syncro TDI

> a fully rebuilt TDI engine (1Z/AHU), rebuilt/re-geared transmission (1.14
> 3rd, .77 4th)

With low ratios like that you'd need a TALL diff ratio or be unable to
break 100kmh!

--
Regards
Andrew Grebneff
Dunedin
New Zealand
Fossil preparator
Mollusc, Toyota & VW van fan