Need Your Expertise Deciding... - Page 2

eddie1 · 06-06-2007, 09:41 AM

Excellent. Thanks for your help m8!

ini · 06-07-2007, 09:19 AM

Dont forget that all the 1.9 TDI's, both VE and PD engine versions can be 'easily' tuned upto around 250bhp without melting or breaking anything.

Bolt on a VNT-20/22 turbo, larger injectors + FMIC, then remap.

**docurley** · 06-07-2007, 11:41 AM

Nice to see we have some TDI knowledge on here.

eddie1 · 06-08-2007, 01:13 PM

What about the 2.5TDIs? Petrol is ok and all, but I think if I bought a petrol car, I'd really miss the immense torque of the diesel, and I think I'd lose that effortless 'takeoff' power diesel gives in any gear at any revs due to its torque.

Please advise.

ini · 06-08-2007, 04:40 PM

The 2.5 diesel lump is a bit to heavy.

The 1.8T is a fantastic engine and will tune up to a higher bhp than the TDI's + there are lots of excellent mods available.

I think a highly tuned 1.9TDI will definately have the edge when it comes to torque.

There are people out there with 300bhp 1.9TDI's, but running more than 500 - 600nm torque is more than enough for the drivetrain.

eddie1 · 06-09-2007, 06:19 AM

Quote:

Originally Posted by ini

The 2.5 diesel lump is a bit to heavy.

The 1.8T is a fantastic engine and will tune up to a higher bhp than the TDI's + there are lots of excellent mods available.

I think a highly tuned 1.9TDI will definately have the edge when it comes to torque.

There are people out there with 300bhp 1.9TDI's, but running more than 500 - 600nm torque is more than enough for the drivetrain.

Ah, I see. However you say the 2.5 is 'too heavy' do you mean physically in weight on in some other way?

My thoughts were a highly tuned 1.9 may blow or melt or implode, but since the 2.5 was bigger, thicker/heavier block etc that it would be able to take any extra punishment from bigger turbo's etc?

ini · 06-09-2007, 06:38 AM

I mean the 2.5 lump makes the car a bit too front heavy.

It is a very strong smooth engine compared to the 4 cylinder versions, and probably will take more boost with a VNT-25 (if it fits in the engine bay), but the vnt-25 probably has a bit too much lag with it.

I think for day to day driving, a PD150 'VB' VNT-17 or VNT-20 is probably a good compromise between lag, charge temp and power.

The larger turbo's tend to give lower EGT's than a standard turbo.

I think 220bhp would be an ideal level of safe power for a 1.9TDI.

Les 51 · 06-09-2007, 12:28 PM

I have the 2.5 tdi and I love it! It's the first Audi I have owned so I don't know what the others are like in comparisment, but I do know you can tune the 2.5 to at least 240bhp, which seems enough for me. (when I get the time!)

eddie1 · 06-11-2007, 04:08 AM

240? That's v. good, considering the torque output of those engines too...

06-07-2007, 11:41 AM	#13 (permalink)
docurley Super Moderator Join Date: Sep 2006 Location: London Posts: 873 Gallery: (6)	Nice to see we have some TDI knowledge on here. __________________ OEM RS4 Body\| RS4 front Brakes\| RS4 shocks & H&R Race springs\| RS4 Xenons\| 18" BBS RC wheels\| Scroll K04 Outlaw\|RaceTec FMIC\| Southbend StageIII clutch\| Autobahn88 Silicon hoses\| Baileys DV\| Waiting to be fitted: TT MAF\| 380 injectors\| RS4 Rear brakes & a Remap

06-09-2007, 06:38 AM	#17 (permalink)
ini Full Member Join Date: Apr 2007 Posts: 99 Gallery: (0)	I mean the 2.5 lump makes the car a bit too front heavy. It is a very strong smooth engine compared to the 4 cylinder versions, and probably will take more boost with a VNT-25 (if it fits in the engine bay), but the vnt-25 probably has a bit too much lag with it. I think for day to day driving, a PD150 'VB' VNT-17 or VNT-20 is probably a good compromise between lag, charge temp and power. The larger turbo's tend to give lower EGT's than a standard turbo. I think 220bhp would be an ideal level of safe power for a 1.9TDI. Last edited by ini : 06-09-2007 at 06:41 AM.

06-09-2007, 12:28 PM	#18 (permalink)
Les 51 Full Member Join Date: Dec 2006 Posts: 77 Gallery: (0)	I have the 2.5 tdi and I love it! It's the first Audi I have owned so I don't know what the others are like in comparisment, but I do know you can tune the 2.5 to at least 240bhp, which seems enough for me. (when I get the time!) __________________ Listen to the Bluehorsesthey Rock!

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06-06-2007, 09:41 AM	#11 (permalink)
eddie1 Newbie Join Date: Jun 2007 Posts: 9 Gallery: (0)	Excellent. Thanks for your help m8!

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06-07-2007, 09:19 AM	#12 (permalink)
ini Full Member Join Date: Apr 2007 Posts: 99 Gallery: (0)	Dont forget that all the 1.9 TDI's, both VE and PD engine versions can be 'easily' tuned upto around 250bhp without melting or breaking anything. Bolt on a VNT-20/22 turbo, larger injectors + FMIC, then remap.

06-08-2007, 01:13 PM	#14 (permalink)
eddie1 Newbie Join Date: Jun 2007 Posts: 9 Gallery: (0)	What about the 2.5TDIs? Petrol is ok and all, but I think if I bought a petrol car, I'd really miss the immense torque of the diesel, and I think I'd lose that effortless 'takeoff' power diesel gives in any gear at any revs due to its torque. Please advise.

06-08-2007, 04:40 PM	#15 (permalink)
ini Full Member Join Date: Apr 2007 Posts: 99 Gallery: (0)	The 2.5 diesel lump is a bit to heavy. The 1.8T is a fantastic engine and will tune up to a higher bhp than the TDI's + there are lots of excellent mods available. I think a highly tuned 1.9TDI will definately have the edge when it comes to torque. There are people out there with 300bhp 1.9TDI's, but running more than 500 - 600nm torque is more than enough for the drivetrain.

06-11-2007, 04:08 AM	#19 (permalink)
eddie1 Newbie Join Date: Jun 2007 Posts: 9 Gallery: (0)	240? That's v. good, considering the torque output of those engines too...

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