remap torque figures

[vicktor]

Had my car on a rolling road saturday, my bestfigures were 180.9 bhp &329.3 lbftorque is it unusual to get such a high torque figure? car was remapped 8weeks ago returned 189.5bhp 310lbft.

both figures done on same RR with same mods except i replaced air filter with green cotton.

[vicktor]

forgot to say this was a stage one remap

[turbonutter69]

That sounds about right to me for a diesel. You get good Torque gains from remapping a diesel.

[HDi fun]

That's the only thing that really makes a diesel worth having ie. stupidly high torque figures when remapped. I wouldn't drive one otherwise.

[vicktor]

yeah love the torque too
reason i ask is the remapper said torque was really high for a stage one with my mods. said he'd like too read my ecu/remap too see why???

is there any reason why i should be worried or should i be driving with the biggest smile ever

[Sid447]

If the guy at the dyno,

Checked your car fully and found everything was okay. Plus if the car feels good to you...why worry about a peak figure.
It's the average torque throughout the rpm range that's important. Any engine is only at it's peak figure for less than a moment. But it uses the average power and torque throughout the rev range constantly.

[HDi fun]

Diesels are more linear now than previously. Most now don't like really low revs (below 1200rpm, say) because of the very low (relatively speaking) compression ratios employed. The turbo(s) is (are) doing nothing at all really at that time.

The lowered ratio means that more air can be crammed in under boost, thus enabling more fuel to be burnt.

Turbo diesels used to be very peaky indeed with the engine feeling dead off boost and spineless once the torque peak had passed. Try a 97-98 Passat TDi 110 (pre PD) to see what I mean.

Sometimes an old fashioned non turbo diesel can be surprisingly flexible at modest speeds. Very high geometric compression ratio and no turbo to wait for.

[waynne]

I think you keep grinning for a good few years.

[HDi fun]

That tidal wave of torque is something you never really tire of. It's more addictive to me than the hyterical 8000+rpm thrash of a revvy petrol engine.

[vicktor]

Originally Posted by HDi fun

That tidal wave of torque is something you never really tire of. It's more addictive to me than the hyterical 8000+rpm thrash of a revvy petrol engine.

yeah had a go in a petrol leon cupra R stage2 remappad same day, power goes on &on but still prefer the head jerk torque off mine

[turbonutter69]

Originally Posted by HDi fun

That tidal wave of torque is something you never really tire of. It's more addictive to me than the hyterical 8000+rpm thrash of a revvy petrol engine.

Nah i'd have the high revving turbo'd petrol version myself.
I bet you was waiting for me to say that wasn't you.

[HDi fun]

I'd take the high revving petrol version if it was a straight six and silent. I still maintain that a 200bhp diesel drives with the midrange feel of a 300bhp petrol given the difference in gearing etc.

[turbonutter69]

Originally Posted by HDi fun

I'd take the high revving petrol version if it was a straight six and silent. I still maintain that a 200bhp diesel drives with the midrange feel of a 300bhp petrol given the difference in gearing etc.

Maybe a remapped diesel but not a standard one.

[HDi fun]

Originally Posted by turbonutter69

Maybe a remapped diesel but not a standard one.

I agree there as well. OK, BMW 535d or Jaguar XF Diesel 3.0S should be absolutely fine in standard tune.

But somehow I know that I'd still remap; just because I can.

I'd still struggle with the XF 3.0 Diesel S over a 510bhp petrol though. It would be like choosing a 535d over an M5 - you wouldn't would you if money was no hindrance.

As I said elsewhere, money no object then I would plump straight for the biggest, many cylinders as possible petrol engine.

Diesel is a good way to get barnstorming acceleration power for relatively small amounts of money. That's all.

I manage similar MPG from mine (40 ish) as my Dad gets from an 02 plated 1.6 Astra - but his car is 115bhp down on mine and has about 1/3 of the torque, so you can see the attraction.

[turbonutter69]

Originally Posted by HDi fun

I agree there as well. OK, BMW 535d or Jaguar XF Diesel 3.0S should be absolutely fine in standard tune.

But somehow I know that I'd still remap; just because I can.

I'd still struggle with the XF 3.0 Diesel S over a 510bhp petrol though. It would be like choosing a 535d over an M5 - you wouldn't would you if money was no hindrance.

As I said elsewhere, money no object then I would plump straight for the biggest, many cylinders as possible petrol engine.

Diesel is a good way to get barnstorming acceleration power for relatively small amounts of money. That's all.

I manage similar MPG from mine (40 ish) as my Dad gets from an 02 plated 1.6 Astra - but his car is 115bhp down on mine and has about 1/3 of the torque, so you can see the attraction.

But thats my point. I don't see the attraction. Even with the MPG figures I'd still take the petrol version.
Like I said in the Thread about "Real Drivers".... We don't worry about MPG.

[HDi fun]

So you'd take a 1.6 Astra with 75bhp over a diesel with 190bhp? I don't think that's what you meant to say, is it?

[turbonutter69]

Originally Posted by HDi fun

So you'd take a 1.6 Astra with 75bhp over a diesel with 190bhp? I don't think that's what you meant to say, is it?

I never said what car I'd take. I said I'd take a petrol version over the diesel version. Same size engine etc.

[HDi fun]

I wouldn't take a 2.2 petrol 4056 over the HDi I'm afraid

[turbonutter69]

Originally Posted by HDi fun

I wouldn't take a 2.2 petrol 4056 over the HDi I'm afraid

Whats a 4056?

I'm sorry though but I would.

[HDi fun]

Originally Posted by turbonutter69

Whats a 4056?

I'm sorry though but I would.

A 4056 is a very special model for drunks who can't type!

I suspect if you drove a 2.2 petrol back to back with a 2.2 HDi you'd see things very differently.

[MasterAuron]

Originally Posted by HDi fun

I suspect if you drove a 2.2 petrol back to back with a 2.2 HDi you'd see things very differently.

Alas, I suspect if a 2.2 petrol turbo derivertive were avaliable and you drove that, you'd see things very differently

[turbonutter69]

Originally Posted by MasterAuron

Alas, I suspect if a 2.2 petrol turbo derivertive were avaliable and you drove that, you'd see things very differently

My point exactly. What would you choose out of a 2 litre Td or a Mitsi Evo?
I know i'd have the Evo all day long.

[HDi fun]

If Peugeot had made a 2.2 petrol turbo model then I would have driven it made a decision based upon that comparison. Possibly I'd have chosen the hypothetical 2.2 petrol turbo.

I'm still content with my choice of 2.2 HDi over 3.0 V6 petrol though. The performance in real world driving is little different. The remapped HDi is still much quicker in the midrange when compared to the 24 valve V6 petrol.

I am no stranger to high performance cars and I truly adore the flexible and effortless shove which a 4.0 V8 petrol engine has to offer.

I've driven numerous proper fast cars over the years so please don't think I'm hammering on about my own car simply because it goes pretty nicely - it's nowhere near the liveliest car I've driven. (I actually quite fancy a Porsche 928 S4 from around 1987).

I'm also a fan of Honda's silly revving VTEC units - I got very fond of a 2.2 VTEC prelude I was using during 1998. Just when you think it's over at 5800rpm things change - and you get another 3000rpm to play with.

If PSA had done a 2.2 litre turbo petrol then that would have possibly attracted me, as it, too, could be tuned via the, again, hypothetical, OBD2 port.

Diesel does have it's place, and it suits me for now.

Please do remember that HDi used to hate and despise diesel cars for years and years.

Why - because they were SLOW AND NOISY. And if they were still as such, I would not be driving one of 'em, or any of 'em.

[Yugguy]

I used to be a petrol only bloke until I got a remapped diesel. Now I've got a car that feels like it can pull a freight train and does 50mpg.

Interestingly, Alfa's 159 with the 2.2 petrol is no quicker 0-60 than with the 150bhp 1.9 JTD engine, and the diesel has way more torque for midrange and much better mpg.

Go figure.

[HDi fun]

Don't be silly Yugguy.

Everyone knows that a 205bhp diesel car will never outrun an 85bhp petrol car. You see, it's all about being a good driver and good drivers don't ever drive diesel cars.

Never.

Ever.