Date: Thu, 20 Apr 2006 12:04:26 -0400
Reply-To: "Bostig Eng." <syncrolist@BOSTIG.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: "Bostig Eng." <syncrolist@BOSTIG.COM>
Subject: Re: Engine replacement
In-Reply-To: <4447A8AC.7000504@verizon.net>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Nonsense? No, just worded wrong. The gross torque steer we see in W bodies
(both the SC'd GTPs for instance and the NA 3800s, will obviousy change in
character once you make them non-steering wheels, and move them to the
back... so you're right on that, however you are still going to be affected
by the different length halfshafts unless you decide to install an LSD..
the 4t60e and 4t65es are way more apt to peg leg it than say, the stock VW
open diff setup... as to the exact cause? Open diff+power+different length
halfshafts. Why do you suppose the stock automatic don't have serious
traction problems in one wheel when they take off? No power. But change
the equation again, this time increasing the bias on the transaxle itself,
keep it open, and add WAY more power and torque as you would be with the
3800, you are going to be very disappointed in finding that you'll spin up
the short side way before you feel you should... of course this is
speculation based on my experiance with those transaxles.
Bottom line, with any of the half dozen or so GTPs run by 3800 Series II
supercharged 3.8s with the 4T65E that we've worked on(especially once they
dump the eaton and go with a turbo), or the NA 3800 GPs with the 4T60E
(which is likely the transaxle you'd be running) there are bias problems
way worse than just about any other FWD setup I've worked on, except the
saabs. As to whether or not it would have an effect on the vanagon once
you install it, that's why I said it "could" be interesting. I'd say
anything above 3/4 throttle from a stop and you'll have a one wheel smoke
show, and if the engine is in really good shape, maybe you could even
unsettle the van at low speeds. I say, you go ahead and do it, then bring
it by for a test drive, and we can dyno the setup... and then I'll agree
with you there isn't a problem if there isn't a problem. That's how we
separate the "men from the boys" Joe. Unless of course in your experiance
with W bodies you haven't run into the gross amounts of side to side biased
output as we have, then I'd understand your contempt for my first reply to
you. But get it finished first, and then let's see what you have. At worst
you have a one wheel wonder, at best you have what you were hoping for.
Jim
At 11:28 AM 4/20/2006, -------------------- wrote:
>Sorry but that's just non-sense. (This is why I love the
>vanagon list....it really separates the men from the boys)
> All automatic vanagon have different length haft shafts.
>Moving it to the rear would make things less
>complicated, as keeping the shafts and axles aligned
>would eliminate any steering issues.
>
> Joe W.
>
>
>Bostig Eng. wrote:
>
>>one big problem in using FWD setups for the RWD application will be
>>the introduction of assymetrical halfshafts... RWD "torque steer"
>>could be a very unsettling thing.. but it'd be fun to watch! :)
>>
>>At 10:44 PM 4/19/2006, -------------------- wrote:
>>
>>>Take the entire drive line. This was my second choice in engine swaps.
>>>I was thinking of taking the entire tranaxle and engine from a GM 3.8L
>>>and matting it at the half shafts. The vehicle weight is about the
>>>same,
>>>so it will be a great match. Parts are everywhere. Your biggest
>>>problem
>>>with this is cutting the rear seat area (maybe) to fit this arrangement.
>>>When complete this will be the best setup going, except for gas milage.
>>> joe. W.
>>>
>>>
>>>
>>>Evan Mac Donald wrote:
>>>
>>>>I need to replace the engine in my '84 (with a manual trans), and
>>>>have a deal on an '88 Olds 3.8 from a FWD. It is an electronic
>>>>engine, fuel injected and all. Has anybody that has done a "small"
>>>>V-6 such as this got anything to say? My main worry is about this
>>>>engines' life expectancy. It will be revving much higher than
>>>>orginally designed, and for long stretches. I hope the trans should
>>>>be able to take the loads, as it will be a highway / trip truck, not
>>>>a daily driver. I know the conversion part will not be bolt-up, and
>>>>am not worried about most of that.
>>>>
>>
>>
>
________________________________________
Bostig Engineering
Engine Systems Voodoo
http://www.bostig.com/
617.272.3800
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