Page 1 of 4
My RS under the knife..
Posted: Fri Jul 12, 2013 8:46 pm
by ad2330
Getting a few things thrown on the car this weekend:
JHM full 2.75" exhaust (non-res; catless)
JHM LWFW/Clutch (stage 4)
JHM Intake Spacers
JHM Short throw/linkage
JHM 91 octane tune
Carbon Clean
Looking forward to re-introducing myself to my car come Sunday!
Will keep you posted.
Re: My RS under the knife..
Posted: Fri Jul 12, 2013 9:27 pm
by Noyjatat
Nice I take it you are in the US then
Re: My RS under the knife..
Posted: Fri Jul 12, 2013 9:44 pm
by ad2330
Correct.
Re: My RS under the knife..
Posted: Sat Jul 13, 2013 11:08 pm
by sync24
Happy days! I really wanted a JHM zorst - but they are SO expensive to ship to the UK - be good to see the results.
Re: My RS under the knife..
Posted: Sun Jul 14, 2013 11:04 am
by Rick_RS4
looking forward to seeing the resullts from this,
Re: My RS under the knife..
Posted: Mon Jul 15, 2013 9:08 am
by Spectre
Re: My RS under the knife..
Posted: Mon Jul 15, 2013 1:26 pm
by sakimano
sync24 wrote:Happy days! I really wanted a JHM zorst - but they are SO expensive to ship to the UK - be good to see the results.
Even if shipping is $1000 (it's not) the JHM 2.75" catback exhaust + Jhm 2.75" Downpipes with cats is still cheaper than a MTM catback exhaust alone.
$2750 USD (catless) is about £1750.
Here's a friend's car on the dyno this weekend. Jhm catless fullback and tune, 365 whp 311 wtq. Temperature was 27 Celsius.
A stage 3 b5 s4 with k04 turbos put down 350 whp and 400 WTQ right before him.
https://www.youtube.com/watch?v=uCsKy7s ... ata_player
Re: My RS under the knife..
Posted: Mon Jul 15, 2013 2:11 pm
by hlbeckley
that is great WHP....wow
nearly 100 more than what a few standard Rs4s making here in Johannesburg
Re: My RS under the knife..
Posted: Tue Jul 16, 2013 1:20 am
by sakimano
hlbeckley wrote:that is great WHP....wow
nearly 100 more than what a few standard Rs4s making here in Johannesburg
That is pretty normal for jhm full catless plus jhm tune. I know of 3 other rs4s with that setup that made between 360 and 370 whp.
Re: My RS under the knife..
Posted: Tue Jul 16, 2013 1:56 am
by ArthurPE
Johannesburg is 5800 ft asl
that is almost a 22% power loss or 1.28 cf
so 270 ~ 345 corrected (for the same temp, humid and atm pressure, 77F, 0% rh, 29.235 "hg)
Re: My RS under the knife..
Posted: Tue Jul 16, 2013 2:15 am
by sakimano
ArthurPE wrote:Johannesburg is 5800 ft asl
that is almost a 22% power loss or 1.28 cf
so 270 ~ 345 corrected (for the same temp, humid and atm pressure, 77F, 0% rh, 29.235 "hg)
Good point!
The dyno run in question was done at about 200 feet of elevation and probably 2000 feet density altitude (guess) at midday on Saturday. Nearest dragstrip for a da calculator is Toronto Motorsports park 40 miles away.
Re: My RS under the knife..
Posted: Tue Jul 16, 2013 1:04 pm
by sync24
sakimano wrote:Even if shipping is $1000 (it's not) the JHM 2.75" catback exhaust + Jhm 2.75" Downpipes with cats is still cheaper than a MTM catback exhaust alone.
$2750 USD (catless) is about £1750.
To clarify, a pair of 2.75" JHM downpipes with 200C sport cats [no funky vband connectors] and a twin 2.75" cat back system comes in at $3100 or roughly £1998 [They have a group buy on at the moment] - but delivery is around $400 and then you have
UK import duty as well. Overall it works out around £2882 to the get the system to you in the UK and then you have fitting and RR time....
I am having a bespoke system made for a grand cheaper at the moment - expect results on Friday eve .....
Re: My RS under the knife..
Posted: Tue Jul 16, 2013 1:54 pm
by sar
sync24 wrote:I am having a bespoke system made for a grand cheaper at the moment - expect results on Friday eve .....
obviously 2.75 with an x pipe?
Re: My RS under the knife..
Posted: Tue Jul 16, 2013 4:04 pm
by sync24
sar wrote:sync24 wrote:I am having a bespoke system made for a grand cheaper at the moment - expect results on Friday eve .....
obviously 2.75 with an x pipe?
Close - but no cigar
Re: My RS under the knife..
Posted: Tue Jul 16, 2013 5:48 pm
by sar
hmmm, don't be tempted to go bigger than 2.75.
x pipe is essential.
