[s-cars] more boost with rs2 turbo

Wed Oct 19 08:48:38 EDT 2005

I think typically, the spring will control the rate of change of the 
wastegate, and contributes to how the wastegate responds to pressure on the 
diaphragm below it.
It has everything to do with wastegate creep.

Ultimately if you leave the motronic (or whatever ECU you use) to control 
the boost, then it will control the boost to what is programmed in the ecu.

Mark
----- Original Message ----- 
From: <krists at livas.lv>
To: <s-car-list at audifans.com>
Sent: Wednesday, October 19, 2005 4:07 AM
Subject: Re: [s-cars] more boost with rs2 turbo

> Helo Sean!
> Have You seen these pressure number with just the SW and w/o changing the
> WG spring? So the question is - does the stiffer WG spring relates to MAX
> boost possible?
>
> Original Message:
> -----------------
> From: Sean Douglas quattro20v at telus.net
> Date: Tue, 18 Oct 2005 20:14:32 -0700
> To: krists at livas.lv, s-car-list at audifans.com
> Subject: RE: [s-cars] more boost with rs2 turbo
>
>
> Depending on the software, I've seen 2.6 to 2.9 bar absolute. I found
> the higher boost software too aggressive and it allowed too much timing
> advance, causing detonation even with 94 octane (RON+MON/2). I switched
> to a different chipset which allows 2.6 bar and the engine does not
> detonate.
>
> Its quite possible that the spring is stiffer on the RS2, the part
> numbers for the wastegate are different, 034 145 705E (RS2) and 034 145
> 705B (AAN).
>
> Sean Douglas
> 1997 Audi S6//RS2-spec
> 1990 Audi 90 quattro 20v
>
>
>> -----Original Message-----
>> From: s-car-list-bounces at audifans.com
>> [mailto:s-car-list-bounces at audifans.com] On Behalf Of krists at livas.lv
>> Sent: Tuesday, October 18, 2005 12:14 PM
>> To: s-car-list at audifans.com
>> Subject: Re: [s-cars] more boost with rs2 turbo
>>
>>
>> Hello Robert,
>>
>> I've done the WG screw mod and have experimented with this
>> but when I had the Motronic setup, I remember, that scroll
>> down the screw with the max. possible turns got me +0.1BAR of
>> boost - and that was with the original chipsets (so - 2.3
>> overboost). With the MBC , it was 2.5BAR max.
>>
>> The question was, what AAN rs2'ed guys do for having 2.8BAR
>> absolute(1.8 relative turbo boost )? Does the software and
>> 3BAR MAP sensor change (not to mention all the other rs2
>> bits) will give one these boost numbers? I've heard that real
>> Audi RS2 WG spring is stiffer than found in ABY/AAN setups.
>>
>>
>> Original Message:
>> -----------------
>> From: Robert Myers robert at s-cars.org
>> Date: Tue, 18 Oct 2005 10:13:37 -0400
>> To: krists at livas.lv
>> Subject: Re: [s-cars] more boost with rs2 turbo
>>
>>
>>
>> Hi Krists,
>>
>> Stiffening the WG spring might help.  Drill a small hole dead
>> center in the
>> plug in the center of the WG cap and use a sharp object (a
>> nail perhaps) to
>> pop the plug out.  Discard it.  The plug is < 1 mm thick so don't go
>> drilling for oil ;-).  Now use a 5(?) mm Allen wrench to
>> screw the newly
>> exposed screw into the WG.  Some are lock-tighted in place
>> and may require
>> heat from a propane torch to soften the stuff enough to screw
>> the bolt
>> in.  Keep track of how many turns you use so you can put it
>> back later if
>> you want to.  Optimal for my car turned out to be about 4
>> turns.  Others
>> report anywhere from 3 to 6 turns as optimal for their cars.
>>
>>
>> At 10:05 AM 10/18/2005, you wrote:
>>
>> >Hello!
>> >The problem is that I'm seeing aprox 1.5 turbo boost pressure (2.5
>> >absolute) all the way to 5500rpm and I can't get it to 1.8BAR. How
>> >could I resolve the problem and what's the limiting factor
>> of boosting
>> >max to 1.5BAR? - can one get 1.8BAR with the standart WG
>> spring. Do I
>> >need the stiffer WG spring (one from 034efi that says 1.9Bar
>> max boost)
>> >or should I fit a MBC between the WGFV and WG and keep the stock WG
>> >spring? P.S. I have a 3BAR MAP so no worries about how the ECU could
>> >stick with these boost levels Silver Euro S4 91'
>> >
>> >
>> >
>> >
>> >
>> >
>> >Megasquirt ECU (3 BAR MAP, custom COP ignition setup, mega squirt'n
>> >sparks -extra firmware) rs2 turbo
>> >rs2 ex.mani
>> >48lb/h injectors running at 4BAR
>> >Bosch racing fuel pump
>> >710N BPV
>> >custom exhaust system
>> >MB CLK /Typ 208/ 315mm front brakes
>> >Audi A6 2000 avantgarde 17"x8.5
>> >Michelin pilot sport 255x40
>> >Audi TT shifter
>> >
>> >
>> >
>> >--------------------------------------------------------------------
>> >mail2web - Check your email from the web at http://mail2web.com/ .
>> >
>> >
>> >_______________________________________________
>> >S-CAR-List mailing list
>> >S-CAR-List at audifans.com
>> >http://www.audifans.com/mailman/listinfo/s-car-list
>> >
>> >
>> >
>> >-- incoming mail is certified Virus Free.
>> >Checked by AVG Anti-Virus.
>> >Version: 7.0.344 / Virus Database: 267 - Release Date: 10/17/2005
>>
>>
>> --------------------------------------------------------------------
>> mail2web - Check your email from the web at http://mail2web.com/ .
>>
>>
>> _______________________________________________
>> S-CAR-List mailing list
>> S-CAR-List at audifans.com
>> http://www.audifans.com/mailman/listinfo/s-> car-list
>>
>
>
> --------------------------------------------------------------------
> mail2web - Check your email from the web at
> http://mail2web.com/ .
>
>
> _______________________________________________
> S-CAR-List mailing list
> S-CAR-List at audifans.com
> http://www.audifans.com/mailman/listinfo/s-car-list
> 