Best HP Options for a 2003 4.2 a6 - Normal??????

Mr. Scary · 01-22-2005, 01:01 AM

I just oredered the LLtek air intake, getting rims and some exteriror styling. What is the best I can do to full this up from 300 hp?? Best barke options for 19" Rims? amy other suggestions?

Thanks, guys!

Hy Octane · 01-22-2005, 01:01 PM

Well, GIAC engine and tiptronic chips will boost you up to about 320 or so, then you can add an exhaust system which is good for about another 15-20 hp. I had the supersprint system on my 03 4.2... It dynoed at 346hp on 100 octane gas (with an internal problem I might add)...Thats about all unless you want to open her up and replace the cams with S6 ones and change the final drive ratio.. Also, running on the hy-est octane in your area helps a bit too..

BTW. The cold air intake is useless for your motor. Better to leave it off.. The motor gets plenty of air.. its the other bits that need help..

Mr. Scary · 01-22-2005, 10:26 PM

Wow, I dream in RS6 Visions! Thanks, that's exactly the tips I was looking for.

Mr. Scary · 01-22-2005, 10:43 PM

Where do I get the S6 cams? How much and how much HP gain? Is it that noticeable by the dealer?

Hy Octane · 01-23-2005, 01:59 PM

The 4.2 in the S6 is the same basic motor with higher performance cams and a few other changes to get 40 more HP and some additional torque than the A6 4.2. I suppose you could order a set thru Audi parts dept but they wont do the instal. You would have to find an indie.. prolly not an easy mod as the ECU would no doubt have to be changed. Start with the chips and exhaust and see how you like that ..

markbradford · 01-24-2005, 01:18 PM

Hy Octane · 01-24-2005, 03:31 PM

ryoung · 01-24-2005, 07:14 PM

I'm curious how they compare to these for the A8. The valve timing below is from the Bentlety, 1mm valve lift:

.......................... ABZ ...... AEW ... AKB/AUX
IVO after TDC ....... 10 ......... 10 ....... 25
IVC after BDC ....... 40 ......... 25 ....... 45
EVO before BTC ... 30.5 ........ 30 ....... 38
EVC before TDC ..... 2 .......... 10 ........ 8

The ABZ 4.2L motor is 300 hp @ 6000 rpm, the AKB and AUX 4.2L motors are 310 hp @ 6200. The AEW is the 3.7L motor from the FWD A8 and is 230 hp @ 5500 rpm.

Unfortunately, my Bentley doesn't list the cam specs for the S8 motor. Actually, it Bentley contains a typo and lists the AKB/AUX motors twice. If anyone has a later Bentley with the S8's cam specs, I'd like to see them.

PaulW · 01-25-2005, 05:02 AM

I have a Euro manual that probably has the specs.....what section is it in so I don't have to find it?

ryoung · 01-25-2005, 06:41 AM

Engine Mechanical
00 General, Technical Data
Engine Data

page 00-3 of our Bentley

Do you have the European A6/S6 manual, the A8/S8 manual, or both?

01-22-2005, 01:01 PM	#2
Hy Octane AudiWorld Super User Garage is empty, add now Join Date: Jan 2003 Posts: 2,242	Re: Best HP Options for a 2003 4.2 a6 - Normal?????? Well, GIAC engine and tiptronic chips will boost you up to about 320 or so, then you can add an exhaust system which is good for about another 15-20 hp. I had the supersprint system on my 03 4.2... It dynoed at 346hp on 100 octane gas (with an internal problem I might add)...Thats about all unless you want to open her up and replace the cams with S6 ones and change the final drive ratio.. Also, running on the hy-est octane in your area helps a bit too.. BTW. The cold air intake is useless for your motor. Better to leave it off.. The motor gets plenty of air.. its the other bits that need help.. __________________ 2013 S5 Monsoon Grey Metallic Premuim Plus MMI Nav Sports Diff Parking system with rear Cam Audi Connect Bluetooth B&O Sound System 19" 5 spoke wheels Advanced Key system Carbon Atlas Inlays Black Nappa Leather H&R OE Springs H&R Wheel Spacers

01-22-2005, 10:26 PM	#3
Mr. Scary New Member Garage is empty, add now Join Date: Nov 2000 Posts: 182	Re: Best HP Options for a 2003 4.2 a6 - Normal?????? Wow, I dream in RS6 Visions! Thanks, that's exactly the tips I was looking for. __________________ <a href="http://www.9studios.com"> </a>

01-22-2005, 10:43 PM	#4
Mr. Scary New Member Garage is empty, add now Join Date: Nov 2000 Posts: 182	S6 Cams? Where do I get the S6 cams? How much and how much HP gain? Is it that noticeable by the dealer? __________________ <a href="http://www.9studios.com"> </a>

01-23-2005, 01:59 PM	#5
Hy Octane AudiWorld Super User Garage is empty, add now Join Date: Jan 2003 Posts: 2,242	I dont know anyone who has done it but its one possibility for more HP gain.. The 4.2 in the S6 is the same basic motor with higher performance cams and a few other changes to get 40 more HP and some additional torque than the A6 4.2. I suppose you could order a set thru Audi parts dept but they wont do the instal. You would have to find an indie.. prolly not an easy mod as the ECU would no doubt have to be changed. Start with the chips and exhaust and see how you like that .. __________________ 2013 S5 Monsoon Grey Metallic Premuim Plus MMI Nav Sports Diff Parking system with rear Cam Audi Connect Bluetooth B&O Sound System 19" 5 spoke wheels Advanced Key system Carbon Atlas Inlays Black Nappa Leather H&R OE Springs H&R Wheel Spacers

01-24-2005, 01:18 PM	#6
markbradford AudiWorld Uber User Garage is empty, add now Join Date: Mar 2000 Location: Chicago Posts: 37,573	Is the compression the same on the A6 4.2 and the S6?

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01-24-2005, 03:31 PM	#7
Hy Octane AudiWorld Super User Garage is empty, add now Join Date: Jan 2003 Posts: 2,242	Yes.. both are 11/1.. __________________ 2013 S5 Monsoon Grey Metallic Premuim Plus MMI Nav Sports Diff Parking system with rear Cam Audi Connect Bluetooth B&O Sound System 19" 5 spoke wheels Advanced Key system Carbon Atlas Inlays Black Nappa Leather H&R OE Springs H&R Wheel Spacers

01-24-2005, 07:14 PM	#8
ryoung Elder Member Garage is empty, add now Join Date: Mar 2001 Posts: 11,968	Do you have A6 and S6 cam specs? I'm curious how they compare to these for the A8. The valve timing below is from the Bentlety, 1mm valve lift: .......................... ABZ ...... AEW ... AKB/AUX IVO after TDC ....... 10 ......... 10 ....... 25 IVC after BDC ....... 40 ......... 25 ....... 45 EVO before BTC ... 30.5 ........ 30 ....... 38 EVC before TDC ..... 2 .......... 10 ........ 8 The ABZ 4.2L motor is 300 hp @ 6000 rpm, the AKB and AUX 4.2L motors are 310 hp @ 6200. The AEW is the 3.7L motor from the FWD A8 and is 230 hp @ 5500 rpm. Unfortunately, my Bentley doesn't list the cam specs for the S8 motor. Actually, it Bentley contains a typo and lists the AKB/AUX motors twice. If anyone has a later Bentley with the S8's cam specs, I'd like to see them. __________________ 2001 Audi S8 2007 Toyota FJ Cruiser

01-25-2005, 05:02 AM	#9
PaulW AudiWorld Super User Garage is empty, add now Join Date: Jul 2001 Posts: 18,202	What section is it in the manual I have a Euro manual that probably has the specs.....what section is it in so I don't have to find it? __________________ 07 S8

01-25-2005, 06:41 AM	#10
ryoung Elder Member Garage is empty, add now Join Date: Mar 2001 Posts: 11,968	Re: What section is it in the manual? Engine Mechanical 00 General, Technical Data Engine Data page 00-3 of our Bentley Do you have the European A6/S6 manual, the A8/S8 manual, or both? __________________ 2001 Audi S8 2007 Toyota FJ Cruiser

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