Engine chips

Chip Suppliers

Might be worth a shot seeing as they do Micro-Chips. Might muck up the leather and make steering a bit more challenging

I wouldn't bother - unless it's a Turbo, then Chipping doesn't really make much difference.

and your insurers will have a fit

...and your warranty will be invalid.

Insurers don't always have a fit....ours have quoted the same price as standard for huge increases on our Golf turbo. Big improvements can be made to non-turbo engines, especially in the smoothness and driveability. And it doesn't always invalidate the warranty.
Is your Jeep a turbo diesel or petrol?

Tony

Just had a look at the Superchips site, and they do a +12bhp for the 4 litre petrol for just short of £300, and +30bhp for the oilers for just over £500.


http://www.superchips.co.uk/car/frameset.htm

Tony

Tony

I've got a Golf Gti 150 diesel and noticed the +40bhp / +60 Nm "improvement" for just over £500

What do you have and what differences did you find ???

Tony,

Its a 4.7l petrol model and I am out of warranty.

Regards


NB

Mine's the 1.8T petrol. 150bhp and 155Lbft as standard went to 210-ish bhp and 230-ish of those torque things. Yours will be far torquier!
It's like using a lower gear, third being very quick and flexible....and thirsty!
Mmmm, 4.7 petrol. I'll have to keep looking!

Tony

Tony,

I have spoken to Superchips and the 4.7l is the only engine they don't do a chip for bugger.

The standard engine has about 225 BHP which sounds a lot but when you consider the size of the vehicle isn't enough.

I am looking for an increase in driveability and a better return in fuel ecconomy rather than more acceleration.

Regards


NB

Realistically you will get nowhere with a 'chip' for a normally aspirated engine. You need to look at breathing improvements, exhaust headers, cylinder heads, valves, inlet manifold, plenum, air filter, camshaft(s) etc. And then you will need a 'chip' to make it all work properly again.

Is there a whole bigger engine you could just swap in?

FWIW whatever you do will end up using more fuel.

Paul

NB

Is an LPG conversion a goer. A mate did his petrol G-Wagen and reckoned he got his money back within 18 months and that was without a powershift grant. He was tempted to do it on his MklV Supra, but he swapped it for a V12 BMW850i instead. He is knocking 50 though and the medallion image was no longer for him

Bosh,

LPG is a non started due to the aluminium cylinder head. I have checked it out but its not recomended. There is a build up in heat and it can blow the head gasket which will cost many thousands to fix!

I certainly wouldn't consider lpg for my Supra, it needs high octane fuel, the higher the better!

Regards


NB

I would reccommend speaking to Bill Blydenstein, he has been doing cylinder heads for years and specialises in improved economy/driveability/power modifications. Other than that you may be able to get an induction kit from ITG and a free-flowing exhaust system from A.N. Other. All of these should improve the efficiency of your engine. All of the non-turbo engine "chips" tend to work by increasing the fuelling at the points where the manufacturer leans out the engine to improve emissions. They won't in any way improve your economy (they will improve responsiveness etc).

It gets worse/cruder than just dumping more fuel in. I recall reading there are some brands of 'powerchip' which obtain(ed) more power by merely stuffing the ignition timing map to maximum advance, and leaving it to the computer and knock sensor to sort out the resulting mess, i.e. keep the engine out of detonation.

As others have noted, there are no gains you'll notice unless the car has a turbo wastegate to hold closed... 10-15hp is neither here nor there on a vehicle the size of a cherokee, and about the variation you'd expect due to weather changes over a year.

Tony - which insurance company did not not have a fit when you chipped the VW - I had to pay a significant increase when I had the car chipped to go from 150bhp to about 180bhp

Derek

<< >>

Derek,

Greenlight.

Tony

Derek,

Privilidge!

They didn't even blink when I increased the Supra's BHP to 450 bhp! The premiums remained the same.

However when I lowered the suspension the premium's doubled!

Regards


NB

Paul,

I don't really want to go down the route of major engine modifications with the Jeep.

I was looking for a quick simple answer but that doesn't seem to be possible. I think I will leave well alone.

Regards


NB