how to tell difference between 2.5 and 2.7 ?????????????????

[e30turboed]

i may be going to view a car this week supposedly has a 2.7 in it. can anyone tell me how to tell the difference ?

[mattG]

good question, they mainly have a longer crank, maybe you can take out a spark plug and measure the depth at BDC

[Onz]

i know the oil dipstick should be different but I dont know what the differences are.

[daimlerman]

It sould have a custum chip of some sort.And a shed load of grunt from around 2000rpm.....

[Onz]

3rd gear lasts much longer too and torque is easier to find.

Idle should be slightly higher than 2.5, mines set just below 1000 at the moment but it has been tuned to be slightly higher too occasionally

[bazza93]

It sould have a custum chip of some sort.And a shed load of grunt from around 2000rpm.....

would'nt that be the same with any 325 with a wild chip fitted ??????

[maxfield]

good question, they mainly have a longer crank, maybe you can take out a spark plug and measure the depth at BDC

That's probably the best way.

[e30turboed]

so if i check in my book for crank throw standard and see if it has more.

[frankiej]

It sounds like that's what they're saying.

[maxfield]

I think the M20's stroke is 75mm.

[daimlerman]

It sould have a custum chip of some sort.And a shed load of grunt from around 2000rpm.....

would'nt that be the same with any 325 with a wild chip fitted ??????

A zone chip from Ant will have '2.7' written on it,like mine.Mine also now has a small 'Miller' sticker....I understand that other chip suppliers fit a similar label.Sometimes a label is attached to the outside of the ECU,so that it is visible without opening up the ECU.

[bazza93]

It sould have a custum chip of some sort.And a shed load of grunt from around 2000rpm.....

would'nt that be the same with any 325 with a wild chip fitted ??????

A zone chip from Ant will have '2.7' written on it,like mine.Mine also now has a small 'Miller' sticker....I understand that other chip suppliers fit a similar label.Sometimes a label is attached to the outside of the ECU,so that it is visible without opening up the ECU.

thats a fair point worth looking at then

[Onz]

so what is the thow of a 2.7? And do Alpina, Hartge and ETA 2.7's have the same throw?

[maggspower]

crank throw is 81mm, i dont think people are going to be too chuffed if you start taking out spark plugs and filling them with all manor of coat hangers welding rods and rulers

try checking the engine numbers by the engine mount on the inlet side of the engine bay, this is not foolproof though as a 2.7 can be made from 2.5 or 2.0 litre block, and of course the eta bottom end. Or if your realy lucky a 324 torbo diesel crank!!

i think the best way of checking would be the ecu, followed up by the old arse dyno

you should feel the difference, if you dont its either a 2.5 or a crap 2.7, no point in paying for and having the 2.7 kudos without the 2.7 grunt. good luck

[e30turboed]

well he was a blagger no paperwork, reckons its 2.7 and still on 2.3 standard fuel injection i just thought whatever didnt even bother looking at it. rusty, no mot, ripped seats for 2k i dont think so. hes in dream land.

[maggspower]

yeah theres alot of them about

anyway keep looking, or better still make your own 2.7

[NK]

i may be going to view a car this week supposedly has a 2.7 in it. can anyone tell me how to tell the difference ?

infact i drive a 2.7 can i help?