Engine Tuning....

[guest5247]

I'm getting used to taking my Jazz to a decent rev range.
The one thing i miss,  my own fault though is 4wd.
The ability to put my foot down with no wheel spin.
The torque and low down turbo coupled with 4wd meant my old Rav4 just went !

I need to push the jazz to go sometimes with a hint of wheel spin , but i don't miss the worry of DMF's and turbos.

I needed an almost new , reliable, cheaper and affordable and practical vehicle for the near future.

The jazz simply ticked the boxes.

[DAN@ADRIAN FLUX]

Hi,
If anyone ever needs any help with insurance at all for modified cars then please feel free to drop me a line. I'd be only too pleased to try and help.
Regards,
Dan.

[applicationcen]

When you watch those American car Pimping shows they always start with a better Air intake and exhaust.
That might give a noticeable 5% power upgrade and is not daft money - perhaps more at the higher revs that Hondas thrive on.

After that it gets like a stereo upgrade - expensive and questionable.

[carlnike]

Iirc ktuner does a similar thing to flashpro for the Jazz

[guest5895]

I would imagine a decent remap would be able to squeeze a little more power and mpg from the iVTEC engines.

The standard maps from the manufacturer are so limited by the range of operating conditions and legislations in all the countries they are sold in that a decent mapper can usually tweak a map to get the best out of it within the specific environmental ranges of its location. Having said that; normally you wont get much from a remap on a naturally aspirated engine but due to the VTEC system it should be possible to tweak the valve timings and injection system more that most other engines.

As for insurance; a stage one remap can be done on a standard engine with no visible modifications so technically how would an insurer know? Im not saying I would do this or that I condone it (I own a modified car and all mods are declared).

[carlnike]

When I put the group n map off flashpro there was no extra charges from the insurance, although the remap transformed how the car drove even though there was no peak gain with the group n map

[culzean]

When I put the group n map off flashpro there was no extra charges from the insurance, although the remap transformed how the car drove even though there was no peak gain with the group n map

was there any gain in MPG or do they just bring VTEC point lower down the rev band ?

[carlnike]

Its slightly better on fuel Vtec engages at 3800 and revs out at 8600 it's quite savage to be honest and makes a hell of a racket (prob the 3" zorst)

[guest5247]

So.....I'm intrigued,  this flashpro thing please.

How easy is it , what is it , etc please?

I may possibly do that air filter upgrade...just because its so easy 

[carlnike]

So.....I'm intrigued,  this flashpro thing please.

How easy is it , what is it , etc please?

I may possibly do that air filter upgrade...just because its so easy 

are you fitting it to your Jazz or an fn2

[guest5251]

i haven't found a flashpro for a jazz but i have for a FN2 and its £499
including VAT,you could have a remap done for a lot less than that.

http://www.cplracing.co.uk/products.php?productid=260

[carlnike]

i haven't found a flashpro for a jazz but i have for a FN2 and its £499
including VAT,you could have a remap done for a lot less than that.

http://www.cplracing.co.uk/products.php?productid=260

not on an fn2 you can't as you need the flash pro or hondata dealer flashpro to map the fn2

[peteo48]

Without wishing to re-ignite an old debate about the benefits or otherwise of premium fuel offerings like V Power and Tesco Momentum, is there any evidence that the knock sensor on the Jazz will advance the timing a little and give you a small increase in bhp if you use premium fuels? By evidence I mean measurable as opposed to anecdotal.

[culzean]

Without wishing to re-ignite an old debate about the benefits or otherwise of premium fuel offerings like V Power and Tesco Momentum, is there any evidence that the knock sensor on the Jazz will advance the timing a little and give you a small increase in bhp if you use premium fuels? By evidence I mean measurable as opposed to anecdotal.

look at if from other end.

ECU has to retard ignition to stop knocking (to fire the spark later in the compression stroke - it is the only way to do it), and when it does some of the power in the fuel is lost.  running on 95RON If you select a highish gear (3 or 4) on a hill and floor the accelerator and you can hear a tinkling / tapping sound that means the engine is knocking and ECU has done all it can to reduce 'knocking' to a tinkle ( if knocking is allowed to carry on it can destroy the engine because knocking is the sound you get when explosion in cylinder is happening too early in the stroke because compression is detonating the charge before spark has a chance to, and actually trying to push the piston back down the way it just came up without going past TDC ) - now try the same experiment when you have filled up with higher octane,  chances are the sound will be absent - that is all the evidence I need to know that engine is reacting to octane rating - and that if you engine knocks you are losing power.

If your car engine has knock sensors (they have been around for ever) the ECU has to have to have the facility to advance and retard ignition  as this is the only way to control knocking - ECU will constantly  listen to knock sensors and keep ignition as advanced as it can to ensure you get the most 'bang for your buck' - which will give smoothness, higher MPG and generally make engine more responsive right down the rev range.

[carlnike]

But you still get knocking on a tuned car running high octane as with flashpro this can be read from the data logs. High octane doesn't give any gains even on the fn2 until fully tuned for that fuel