[ba] 80tq Update: 516 wheel hp, 450 wheel TQ
JShadzi at aol.com
JShadzi at aol.com
Thu Mar 3 11:39:00 EST 2005
Working on it! =)
>Hey Javad, you better get some tires under that thing
>before Laguna Seca!!
>--- JShadzi at aol.com wrote:
>> Hello everyone, its been a while since my last post
>> Nov 2004, just an update for any of you that are
>> interested in this ongoing project.
>> The latest since the 455wheel HP run last fall is a
>> bigger 034EFI T3/T62 turbo with flow for about 700HP
>> at a PR of over 3.2. We hit the rollers earlier
>> this week, the result was 516whp and 450.6 wheel TQ.
>> Boost comes on at 5krpm and hits with an ungodly
>> force all the way to 7500rpm (depending on where the
>> revlimiter is). Acceleration is mindboggling, in
>> 4th and 5th is slips the SPEC Stage 3 mercilessly,
>> so a clutch upgrade will be in the future.
>> The Dyno Plot, no corrections at sea level, ATP Dyno
>> where all my dyno plots are done (for consistency):
>> The power is courtesey of an 034EFI T3/T61 turbo
>> with large .82 AR turbine housing. Still running a
>> 3" DP and exhaust with 3" Borla muffler, still
>> running stock 3B IM and throttle body (yes, no
>> Porsche logos here).
>> Turbine Shot of Turbo:
>> Compressor Shot of Turbo:
>> 516whp Dyno Run Video:
>> I also found the limit of the largest of the
>> external CIS pumps, the CIS3 pump (as fit in the
>> 80/90 B3 quattro). At full boost pressure (30psi),
>> fuel presure would peak and then begin to drop
>> rapidly, causing the lean condition towards redline
>> (that you can see on the dyno chart). Since I'm
>> already running only 3 BAR fuel pressure (no point
>> in turning up the pressure, lowering it with larger
>> injectors could be an option if higher pressures
>> were being run) with #75 injectors. I will be adding
>> a second pump in parallel to alleviate the
>> condition. I'll also be using a high flow
>> aftermarket fuel filter, but you can gather the
>> stock Bosch fuel filter is good for at least 600HP
>> assuming its not the restricting factor.
>> Anyhoo, see the fuel pressure drop here!:
>> Some things we now know pretty well:
>> -CIS3 fuel pump good to about 475whp running 3BAR.
>> -SPEC Stage 3 holds up to about 425whp (rated at 550
>> crank HP).
>> -205 series RA1's on a 2900lb quattro with about 600
>> crank HP provide absolutely no traction in any gear.
>> -3B intake manifold and throttle body, unmodified,
>> can support well over 500 wheel HP, with no power
>> drop past 7krpm.
>> -Being able to tune your fuel, ignition, coil dwell
>> times, etc, etc is essential for making power at
>> these levels (ie: 034EFI Stage IIc ECU)
>> -Eagle connecting rods support well over 500whp, as
>> well as the stock Audi block with 83mm JE pistons
>> and ARP head, rod and main studs. Copper headgasket
>> with 0-ringed block seems totally unstressed by this
>> sort of power.
>> -Bosch copper 7A plugs handily take the abuse of
>> almost 300HP/Liter, so do the stock 7A plug wires.
>> -75lb injectors running 40psi base pressure run at
>> almost 95% duty cycle at 516whp, aggrivated by
>> dropping fuel pressure.
>> -About how Hans Stuck felt accelerating in an S1.
>> -Lastly, I5 20v's flat out, unabatedly kick ass.
>> Future plans are to add a second CIS3 fuel pump and
>> go back, I anticipate another 30-50whp just by
>> correcting the a/f ratio with the proper amount of
>> fuel. 3-5 more PSI boost should bring output close
>> if not past 600whp.
>> More about the car at:
>> All for now, comments and jeers welcome as always.
>> Javad Shadzi
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