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Questions (solicitations of recommendations) on upgrade plans
On Wed, 21 Jan 2004 15:38:51 -0600, Patrick Bureau <ats@longcoeur.com>
wrote:
> PS: JH head on 3A block is NOT a turbo setup.. looking at 10-10.5:1
> compression. Decking the head will only increase this and force you to
> run
> racing fuel all the time.
i will chime in with a quick 'i second that'. i too had/have a JH/3A and
my head was decked to the bently spec of 132.6mm and was unable to hide
from ping under heavy load with the timing i wanted to run. a lot of
trips out to the airport solved my issue or a can of octane boost with
premium fuel...i could only get 92 out in the stix of SK. cured it but i
still couldn't advance the be-jesus out of it to get the power where i
wanted, but was more than satisfied. so patrick is plenty correct in the
statement that it is not a good turbo setup...unless custom made pistons
are part of the equation.
> Things you forgot for your swap... install Knock Box and Knock sensor,
> Wire secondary WOTT switches for idles and enrichement, cover plate for
> 3A breather hole to reinstall your gas temp control unit on to the block.
> Suggestions: get external oil cooler. And race dual fans :) Eh but that
> is just me.
man this patrick kid is good ;)
jody
> -----Original Message-----
> From: scirocco-l-bounces@scirocco.org
> [mailto:scirocco-l-bounces@scirocco.org] On Behalf Of stetson
> Sent: Wednesday, January 21, 2004 12:35 PM
> To: scirocco list
> Subject: Questions (solicitations of recommendations) on upgrade plans
>
> I have some great plans for my 8v to have done so I can bring it to Cincy
> this year but would like to ask some questions of the list and maybe
> solicit a few opinions.
>
> Here's what I have presently done:
>
> Fox intake (internally polished) and Audi 5k TB
> 4-2 old school ex. man.
> Eurosport flex/downpipe
> 2" Eurosport exhaust w/ hi-flow cat.
> 16v rear end/disks swap
>
> Here are the plans(#) and questions(a,b,c) per catagory:
>
> 1.) Build a 3A or ABA bottom end/ JH head engine (it would be great to
> just drop in the entire 3A or ABA but I don't think I'll have enough
> time/knowledge to try futzing w/ the wiring necessary. My knowledge
> of
> either 3A or ABA is very limited -- heck, my JH knowledge is not much
> better!)
>
> a.) Since it'll be a complete engine/tranny pull I'm going to be
> interested in a new clutch and flywheel install.
>
> i.) Is a lightened flywheel available in various weights
> or just lightened(8.5 lbs.)/un-lightened(15 lbs.?)?
> [I'd like to get something in between those weights.
> 11.5-12.5 lbs. Could it be done on a lathe if not
> available for purchase?]
> ii.) I've seen many references to a 16v pressure plate
> being a good clutch upgrade. Are there any other
> ancillary parts that would be necessary to fit this
> upgrade on an 8v?
> iii.) I've seen various types (and opinions) of clutches and
> clutch manufacturers. Any that stand above the rest
> from your experiences? Is the rep of Sachs clutches
> deserved?
>
> b.) Since I have a spare JH sitting around (from a Jetta w/ pass.
> side fuel management) I was thinking of getting it's head
> worked up for the swap since it's unused ATM and that makes
> the finished engine something that could be swapped in a day.
>
> i.) Any ball park idea what a P&P will run me? Should
> I take the in/ex man. in w/ it to get port matching
> done?
> ii.) Would it be in my interest to get it shaved too?
> (Would this get in the way of future turbo plans?
> e.g. Too much compression?)
> iii.) Any valve/seats/springs recommendations taking in
> to account the possible future plans??
>
> 2.) I'll be mating the above engine w/ a (maybe rebuilt) 9A 3.67 final
> drive tranny that was pulled from a later 80's 8v Roc in a local
> boneyard. I'd like to do at least a bolt kit and 5th swap (.80 or
> .75) to it.
>
> i.) Any recommendations on vendors for tranny rebuild kit/
> 5th gear purchase? (I've looked @ Autotech for 5th
> swaps, but think it could be done for less initial
> expense w/ quality that is just as good. The challenge
> will be to make the "special" tool. Anybody out there
> already have one that they could shoot me the specs on?
> [length, I.D., O.D., etc.])
> ii.) While it's out and (maybe) torn up, are there any
> other areas you think I should address besides the
> bolt kit to combat SMS, 5th, and maybe a 80% LSD kit?
> iii.) My present 4k has 90mm drive flanges and when the 9A
> was pulled it came w/ 100mm drive flanges w/ axles
> attached (they had no 3x square, BONUS!!!). Will I
> have any problems w/ the size on the spline side of
> the 100mm drive shaft?
>
> I'd like to work on the engine and tranny separately, mate them,
> pull my existing JH, and plop the new setup in and tune. Then I can build
> the other JH into something even weirder for the beater Roc.
> Does the sequence of events sound about right? There will be some
> other things being done too (touch up of engine bay paint, install
> new front motor mount from Eric, install the complete poly set I got from
> parts4vws, etc.) but that's the extent of the plans so far.
>
> Know of anything else I should consider while doing these things?
>
> Thanks for your time and consideration!
>
> Tim
>
> P.S. This may be something that damns me to "ghetto mod" hell by you, but
> I've found that Duplicolor 500 degree ceramic spray paint in "Chevy
> engine block red/orange" is a dead on match for my orig. mars red paint
> job.
>
> It's great to be smart 'cause then you know stuff, I think......
>
>
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