finally made a purchase

[craig1992]

At the top of sheet says maximum 215 (159)bhp @3503 rpm
Think it's producing 215 overall and 159 at the flywheel

[jamesy12345]

At the top of sheet says maximum 215 (159)bhp @3503 rpm
Think it's producing 215 overall and 159 at the flywheel

Something not right there mate - if your car is a 185 that is the approx amount of hp at the crank, with less power at the wheels. 159 sounds about right for wheel hp from 185 at the crank though

[Blackdog]

At the top of sheet says maximum 215 (159)bhp @3503 rpm
Think it's producing 215 overall and 159 at the flywheel

The higher figure would be at the flywheel. You then loose power through the transmission and end up with a "wheel horse power" figure.

[craig1992]

Apparently it still has the police mapping in to be producing that

[Blackdog]

Apparently it still has the police mapping in to be producing that

Don't forget to tell your insurance company then......

[craig1992]

Erm .....

[dionbullock]

Would be interesting to see what bhp my ex plod P3 D5 is?! I'd like to imagine its still 185 as it doesnt feel that quick, but isnt slow either! I'd like to think that a remap would unleash more potential, 205-215bhp at the least! For all I know, it could still have "police spec" mapping or whatever, be running 200ish bhp with no option of mapping it again to make it quicker!

[jamesy12345]

Here's a calculator to get from whp to crank that I've seen used on this forum...

http://www.mk5cortinaestate.co.uk/calculator4.php

185 at the crank through a manual box, FWD gives 157 at wheels. Pretty close to 159 measured (if that is what it was)

[craig1992]

Is there any way to increase the other numbers such as the 159 etc? To get more power on the road that the engine actually produces?

[Doingitsideways]

Is there any way to increase the other numbers such as the 159 etc? To get more power on the road that the engine actually produces?

So you want to put more power down than the engine makes?

Erm...

Flux capacitor, maybe?


The power you put down on the road will ALWAYS be less than is made by the engine, due to the mechanical drag from the gearbox, etc.
Imagine turning a load of cogs joined together in a long row.
It will take a certain amount of effort (power) to make them all turn, this is basically mechanical drag.
The same thing happens with the gearbox, differential, driveshafts, etc of a car. It takes some of the engine's power to move it all.

If you want to put more power down, make your engine develop more. Simple

If you, say, made an extra 50hp at the crank (flywheel), then you'd probably put about 45 (very rough guess) of that down, although it does get quite complicated working it out like that.

[craig1992]

Thanks, I was just curious of getting a better percentage down if you get me. Your last paragraph sums it up. Considering it already has a police remap is there any other ways to increase power except taking the dpf off etc or anything with a massive price tag

[Doingitsideways]

Not really, Fella.

Unfortunately, a remap is the first port of call.
Any mods after that are either expensive as hell, or not really worth the bother.
Newer diesels aren't really my thing though, so I could be wrong.

Example on a T5:
Remap: £300ish.
Stainless cat back exhaust: £400ish
Stainless downpipe: probably £200
200 cell cat: £lots
Bigger turbo £lots more
Then it would all need mapping again to suit.

Custom mapping is expensive, off the shelf maps are configured for everything else being standard.

[jamesy12345]

Is there any way to increase the other numbers such as the 159 etc? To get more power on the road that the engine actually produces?

As Steve says the only way to increase the wheel hp is to increase the crank hp first! Unless you change the transmission set up for a more efficient one!! For example auto to manual swap. If you have a go with that calculator above, from crank to wheel, manual boxes waste about 15% & autos about 20% of the available power

If my car were making stock power at the wheels & there was no evidence (paperwork) for a map then I would assume it hasn't been mapped yet. If the dyno operator is telling you your car has 215 crank hp and 159 at the wheels then personally I think he is telling porkies. That is a 26% loss.

No worries though that means there is a bit of scope for fiddling, meaning that you can enjoy the car even more

[craig1992]

So what's the best way to find out what the actual hp is? Retest on different dyno?

[jamesy12345]

So what's the best way to find out what the actual hp is? Retest on different dyno?

up to you mate but that costs money. If you are sure it has been mapped & want to spend the cash then go for it. Personally I would try not to get hung up on numbers & just worry about whether I enjoyed the drive (easy to say I know)

[Doingitsideways]

Aye, the best way to avoid pub bragging rights is to stay out of the pub!

Personally, I don't know for sure what any of mine are kicking out.
I know ballpark figures from my bum cheek dyno, and I enjoy driving them.
That's good enough for me

[craig1992]

Yes I can safely say I love driving it. I just need to get fuel up a bit so I've stopped booting it at every green light.... unless there's a chav in an a3 or golf thinking they own the road, otherwise it's 6th everywhere at steady speed seen a rise from 31 to 38 due to being that little more typical volvo driver haha. Still can't get over the looks when I'm in traffic or get out in carpark. 23 going on 73 haha