[urq] '83 UrQuattro - Now CIS Potential

[JShadzi at aol.com]

Ben, I'll have to agree with John, and I think I've told you this before as well, there is no easy hp above about 225 with any of the Audi CIS systems, everything is against it including the CIS fuel capacity, the CIS airflow capacity and the factory exh. manifold restriction.  250-300 is much easier with EFI, but even then the IC, exh. manfiold and turbo selection will be critical, EFI will give the airflow potential and fuel accurately, but EFI won't flow air efficiently like the right combo of turbo, IC and induction/exhaust can.

With 15psi I ran 230hp at the wheels in my 80tq, I'm hitting the dyno next week to do another baseline with 15psi running the new 034efi Stage II system with programmable distributor ignition.  The car has never run better or faster, I'm estimating that I'm making at least 10% more power to the wheels (at the same 15psi) due to the ignition tuning alone, but the dyno will only tell.

Like John says, with CIS the most you can hope for is to tune it to about 1.8Bar and live happily with it,anything more will just piss it off and render little results.  There has also been a lot of BS out there about swapping in this Mercedes distributor and that Porsche injector, I don't buy it cause I tried it myself (pre-EFI development) and have yet to see anyone else implement it successfully.  The CIS system works VERY well in the stock application and in slightly boosted applications, but its not a high performance fuel system and its extremely limited as is the whole 10v system  (excluding the motor itself) in stock trim.

I'm a big fan of the 10v, but in order to make 20v power (which it will) it needs to be in a similar level of trim, and then the power starts coming "easier"

Javad
80tq.com

>
>>serious upfront investment, and at what return.  I know I can crank an
>>easy 250-300 out of an MC which I'll rebuild for the car, and will
>>already have two motors to choose from.
>
>Ben,
>
>No one can "crank an easy 250-300 hp out of an MC."  A few of the best Audi
>tuners here in the NW that have instrumented and measured the heck out of
>these cars aren't getting actual HP near that range.  My understanding is
>that the CIS leans out before you get there and you really need EFI to see
>250+ consistently with the MC engines.
>
>Therefore, to get there is $$$ or time or both whether you go EFI MC or
>20vt with Audi's EFI.
>
>My suggestion is to make the car as fast and DEPENDABLE as you can for a
>reasonable outlay of cash and enjoy it.  Unless you stole the car when you
>bought it, you won't recover what you put into it, IMHO.
>
>If anyone has the "holy grail" of MC, non-EFI power and can prove it,
>please let me know!
>