Re: 2 liter re-build decision help

[FreshApple <freshapple@mac.com>]

Check http://www.cpk.lv/ash/audi/engine.html for engine codes...

Theron Ross wrote:

> Here's my dilema:
>
> 1994...Bought a brand-new in-the-crate long block 2 liter motor for my '83
> Rabbit GTI from local VW parts provider, Vee Parts. They were distributors
> for Eurospec. The motor was made in Brazil and is a "bubble-block" with
> 8.5-1 compression with a solid lifter head--for some reason I always thought
> that this motor was built for an Audi model. The motor has the engine code
> of UQ, and interestingly enough, the block does not have any VW/Audi
> designation on it. It's only until you break it open that you see "VW" and
> the quad "O" Audi marks on the crank and rods.
>
> To install it on my Rabbit GTI, I only had to change the gear on the end of
> my distributor and install a new "distributor ring" so that the distributor
> sat in the block correctly. I can't remember having to do anything else to
> make it fit/work correctly in my Rabbit. The motor ran great and had a lot
> of power, however it never gave me the "Ooomph" that I thought a 2 liter
> should. I was always told that it was because of the 8.5-1 compression
> ratio.
>
> 1995...Sold the Rabbit GTI with the motor and everything else. Stupid
> mistake that I always regretted.
>
> Sept. 1999...Bought my '81 Scirocco S and installed a used JH and a 2H
> tranny.
>
> Apr. 2000...Found my old Rabbit GTI in the local AutoTrader and bought it
> back from the owner that I sold it to--my old 2 liter still in the car with
> about 40k miles more than when I sold it to him. The GTI is no longer is the
> greatest of shape, but I wanted the springs and Bilstiens, lower stress bar,
> "self-machining problem fixed" 2H tranny, and the motor so that I could put
> it all in my Scirocco. Yeeehawww!!
>
> So I've torn the motor down (it looks to be in oustanding shape) and have
> all my rebuild parts on order with Potterman. All my rebuild parts except
> for the pistons. Potterman wasn't able to find me cast oversize pistons in a
> higher than stock compression ratio. Actually I wasn't even going to replace
> the pistons until Shawn Meze saw my project and talked me into building it
> into a screamer--Why did I have to listen to HIM!!
>
> So I finally found a vendor who said they could get me oversized (83.5mm)
> pistons in a 10-1 compression ratio. All I would need to do is install a
> knock sensor ignition and I would be in power heaven!! I was walking on top
> of the world thinking about this.
>
> So last week I put in my order, but then the vendor flaked on me. Basically,
> they can get me the 83.5mm pistons in a 8.5-1 compression ratio (not the
> 10-1). The only 10-1 pistons available at this time are the OE 82.5mm
> pistons.
>
> So what do I do? Do I get the oversized pistons in the 8.5-1 compression
> ratio, or the stock bore pistons in the 10-1 compression ratio? Obviously it
> will be more work to go with the 10-1 pistons (as far as setting up the
> knock sensng ignition), but I want POWER!!
>
> Please note that the bores still look like they are in really good shape.
> Yeah, I know that this is only a visual check, but the hone marks are
> clearly visible. And the motor pulled really well before I yanked it out of
> the car. Everything is waiting to be sent to the machine shop for balancing
> (and boring if necessary).
>
> Also, does anyone have any info on my UQ block? No one seems to know much
> about it. Is it the same as the 3A? Searching the internet, a lot of places
> say that the 3A has a 10-1 compression ratio. Interesting to note, my solid
> head has only 3 camshaft bearing caps. The block also has piston squirters
> that shoot oil onto the underside of the pistons. If you remember back in
> the early 90's, it's the same motor that Eurospec was offering their
> advertisements in EuropeanCar magazine.
>
> TIA,
> Theron
>
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--
DanK
'87 16V Black
My Scirocco Page
http://www.uwm.edu/~kroenke



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