[urq] More boost : what is the easiest, fastest, safest bang for the buck ?

[Keith Lloyd]

Phil
Depends how long you want it to be safe. IMO - 14psi gives a bit extra with 
little chance of long term damage but I know others have used significantly 
more. I guess it depends if you can afford rebuilds. You can do 14psi on a 
spring upgrade and zener mod as I am sure you know but if you go higher 
timing will become an issue and the risks rise.
Regards
Keith
'87 WR

----- Original Message ----- 
From: "Phil Payne" <phil at isham-research.co.uk>
To: "'urq'" <urq at audifans.com>; <quattro at audifans.com>
Sent: Friday, November 05, 2010 11:33 AM
Subject: Re: [urq] More boost : what is the easiest, fastest,safest bang for 
the buck ?


> What do most people commonly regard as the highest safe boost level for a 
> standard head gasket?
>
>
>
> From: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] On Behalf 
> Of Steve Buchholz
> Sent: 04 November 2010 22:35
> To: 'urq'; quattro at audifans.com
> Subject: Re: [urq] More boost : what is the easiest, fastest, safest bang 
> for the buck ?
>
>
>
> Schrappnell Knobben requires no mods at all to the WG ... just attach a 
> boost source and pressure regulator to the fitting on the cap.  If you 
> want the "stiffer" spring from idle you can install a pressure accumulator 
> and check valve in the line.  Since you have the nodded EVIDENCE that 
> should be all you need.  IME this will broaden your grin significantly.
>
> Steven Buchholz (mobile)
>
> ----- Reply message -----
> From: "Louis-Alain Richard" <laraa at sympatico.ca>
> Date: Thu, Nov 4, 2010 3:19 pm
> Subject: More boost : what is the easiest, fastest, safest bang for the 
> buck ?
> To: "'urq'" <urq at audifans.com>, <quattro at audifans.com>
>
> Now that my stock urQ is repaired, and since it’ll only see limited road
> duties for the foreseeable future, it’s time to tamper with it a bit.
>
>
>
> First, more boost.
>
> My engine was recently rebuilt, there is no issues now, and the car is
> strong and powerful, as in 160 hp anyway. It feels faster than that modest
> output, even to my car buddies.
>
> I already have a chipped ECU (supposed to be a Lehmann ECU according to 
> the
> previous seller), but still the stock spring. I don’t know yet what is its
> cut-off point for overboost. I will also have access to another chipped 
> ECU,
> from another car that is awaiting its built 20V in the shop as of now. 
> That
> ECu was bought from Andrew Finney, or another guy on the urq list from
> California IIRW…
>
>
>
> I just want to give it a little raise in HP, as much as a 2.0 bar boost
> could give, that’ll be fine for me. According to my master tuner, Brady 
> from
> the Dynodoc tuning shop here in Montreal, K26s don’t like more than 2.0 
> bar.
> We have 94 octane fuel here at Petro-Canada, about a mile from my home, so
> this will be its regular diet.
>
> Faster ice racing laps is my goal. Read, more snow spray at the back of 
> the
> car to impress the youngsters…
>
>
>
> Should I :
>
> 1-      Do the shrapnel knob mod on a spare wastegate ? Adjust with a 
> boost
> gauge or until boost cut-off.
>
> 2-      Install a manual boost controller on the pressure line of the
> wastegate ?
>
> 3-      Install a manual boost controller on the top nipple of the 
> wastegate
> with a supplemental feed line from the intake ?
>
> 4-      Buy a 45$ 1.9 bar spring from 034 ?
>
> 5-      Find a 2.0 bar spring elsewhere ?
>
>
>
> Second, a bit of exhaust sound would do the trick too as good noise=speed 
> in
> the eye of these same youngsters…
>
> The exhaust is still stock. And I want to keep the twin tailpipes as they
> are.
>
> I don’t use a cat, it’s now a straight pipe with a flex, attached with two
> 4 in long 65 mm collars from a TT. The exhaust is still 65 mm all the way,
> _______________________________________________
> Audifans urq mailing list
> Manage your list connection: http://www.audifans.com/mailman/listinfo/urq
> http://www.audifans.com/kb/List_information
>
> Pictures/Polls/Database at: http://autos.groups.yahoo.com/group/urquattro/
>
>  _____
>
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1153 / Virus Database: 424/3237 - Release Date: 11/04/10
>
> _______________________________________________
> Audifans urq mailing list
> Manage your list connection: http://www.audifans.com/mailman/listinfo/urq
> http://www.audifans.com/kb/List_information
>
> Pictures/Polls/Database at: http://autos.groups.yahoo.com/group/urquattro/
>
>