Skip to main content
Gerry | Vanagon
Checking account...
← vanagon.com home · Continue the discussion in the forum
Subject:Re: 15" wheels/gearing and the Ti engine conversion
From:Sean B.
Date:Thu, 10 Jan 2002 18:39:10 -0800

RPM/gearing has nothing to do with the engine. When I had my WBX I was
turning 4k RPM at 70mph. With the new motor I'm still turning 4k RPM at
70mph. The difference is that the new motor, because it is more efficient,
uses less fuel to maintain this speed. Also, because it has more power, it
can get up to this speed faster.Also, it can accelerate past this speed
faster.

As far as the mixture goes, the ECU is smart enough to adjust the injector
firing time to compensate for the lower fuel pressure. I will be confirming
this within a week because I'll be getting an adjustable FPR. I'll pull
numbers from the ECU running the 2 bar that the Vanagon FPR puts out, then
I'll rais the FP a to a point closer to the 2.5 bar the Golf FPR puts out
and pull the numbers again. I'm thinking that the inector firing times will
decrease because the highr FP is letting more fuel through the injectors
for a given amount of time.

Sean B.
'90 V'gon, "Happy Bus", pseudo Wolfy
Torrance, CA
Join the TiiCo registry at
HTTP://www.vgonman.com

                    Bill Marshall
                    <Willolyn99@AOL.C        To:     vanagon@GERRY.VANAGON.COM
                    OM>                      cc:
                    Sent by: Vanagon         Subject:     Re: 15" wheels/gearing and the Ti engine conversion
                    Mailing List
                    <vanagon@gerry.va
                    nagon.com>

                    01/10/2002 18:13
                    Please respond to
                    Willolyn99

Fellow "Tiiconaut" checking in...
       I'm curious as to how your RPM/gearing could stay the same.  Another
question: has your MPG changed with the new tires?  I would hate to think
that all you accomplished was a loss of power. Yikes!
       Also, where did you set your mixture at?  There have been some
threads
on the list mentioning increasing the ratio to make up for differences in
pressure from the vanagon PR to the golf engine.  If you find a rail that
fits the tiny space in the Tiico, let me know.  Best of luck!

Bill Marshall
85 GL
PHX AZ