[s-cars] 2.5 l stroker

[djdawson2 at aol.com]

Not Hap, but...
 
Hap is using a set of 83mm Wiseco pistons.  A couple of us bought these, and they are nice pieces.  You can get them.  Some different piston is a requirement, as you need to have the wrist pin location higher in the piston to accommodate for the increased stroke.  Stock pistons will come out of the bore.
 
Crank... you will need a 92.8mm crank.  You can get it from eurorace.  You should use an aftermarket connecting rod (Pauter/Carrillo), but you must use a stock length rod.
 
Yes, it will all fit into an MC block, but you have to have some clearance grinding done for the rods to clear with the increased stroke.  In that regard, the Pauter rods work easier for block clearance than the Carrillos.
 
Your aftermarket piston should reduce your compression ratio, spec'd properly.
 
Dave
 
-----Original Message-----
From: Ben Swann <benswann at comcast.net>
To: CaptMagu at aol.com
Cc: quattro at audifans.com; s-car-list at audifans.com
Sent: Fri, 14 Apr 2006 09:21:41 -0400
Subject: [s-cars] 2.5 l stroker


Hap,

 

I'm building a bottom end for a 10V with NG head and siamized valves.
Interestingly enough the manifold I've procured from a Eurovan to do EFI
already has 2.5 imprinted on it..  

 

So now I'm wondering if I can obtain 2.5l internals to fit into an  MC-1
block and if so, what is the cost and where to get them.  Also have an NG
block, but assume that would be too high in compression, but maybe that is
what I'd need to use.  

 

Also,  how did you deal with the compression issues - if any?

 

Ben 

benswann at comcast.net

83 urq, /[][] =oooo= [][]\ alpine and Inga

'90 Coupe Quattro (==\ oooo /==) ES2 Conversion

91 200qa20v, [ =!\=oooo=/!= ] avant and sedan

[Date: Thu, 13 Apr 2006 17:20:08 EDT

From: CaptMagu at aol.com

Subject: [s-cars] Weak in the brain,      must get help........ Holy
@#$$%&^%%$#@#%&* Batman!!!

To: s-car-list at audifans.com

Message-ID: <196.52e6050d.31701a88 at aol.com>

 

s-heads

 

I just picked my car up from the dyno shop where the secondary tuning was 

being performed on my AEM managed stroker motor. I'm sitting in an Elite
Glass 

shop getting my windshield replaced so I thought I'd put a few preliminary 

observations to my computer. Holy S#%&@*!()@)_@)(*&@@?*&%@#!!! This thing
pulls 

like nothing I've ever driven or ridden in. I've been in more powerful cars
but 

they were unable to deliver their power to the road. That's just one aspect
of 

these cars that's so fabulous. My custom Southbend race/street clutch is 

performing beautifully. I have to take my hat off to the guys at 3R 

Automotive/Racing. The build and fabrication quality on this car are
outstanding. Thanks for 

everything Dave.

:

<snip>

:

 

The question I get asked a lot is, was it worth the time, money and effort? 

There isn't an easy answer to that one. I am very happy with the result even


short of final tuning. Building a sroker is NOT for 

anyone but the strong of will and or pocket book or preferably both. I love 

the GT 35R but its too big for a nonstroker AAN. The 3071R or in some cases,


the GT 30R are much better matches. I went with the 35R because I knew I
would 

have a stroker eventually and I didn't want to have to buy another turbo.
Guys 

like Dave Dawson and Ben Howell, who's already running a stroker urQuattro 

Coupe, with their engineering skill and fabrication abilities can take
something 

like this on without outside help but those kind of guys are few and far 

between. Oh yeah, it helps if you live in Evahboost like Dave and Ben or
like I 

used to ;-)

 

I think the 2.5 stroker is definitely the way to go. The 2.6 just puts a 

little too much stress on the rods, rings, pistons and crank. You've also
got the 

issue of piston and ring speed that the extra travel from the longer stroke 

provides. Given the low end torque and power I've got with the 2.5, I really


don't see the need for more. Now wait a minute, what about that Nitrous???
No, I 

won't be injecting Nitrous but I would consider the Ntercooler from NX.

 

Next up for the Green Monstah will be a new front coil-over set-up from Dave


Stone. Dave has been developing a complete coil-over system for our cars
which 

includes dual adjustable Konis. The fronts are standard Koni 8611 struts
that 

are revalved for the urS4/6 and the rears are Koni racing that are revalved 

and machined from their standard upper eye fitting to the Audi fitment. He's


also developed a camber/caster plate that is several steps beyond the 2nd
Gen 

2Bennett plates that I currently run. Please don't ask because a local
lister 

has already put a deposit down on my old suspension. That's all I have for
now, 

I just thought I'd share some observations.

 

Hap, wit dakine drivin impressions not from Evahboost, Maguire]

 

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