Few qestions

[zimmer-320i]

What i want to know is what gear box is a shorter ratio for the m20b20 as im thinking of changing the flywheel and cluth for better ones like the 4.5 kg one and A hevey duty clutch,so was thought might as well replace the gearbox for a better one, was also thinking of a chip but unsure what one to go for,

[leeparkes]

im sure the 320i g/box is close ratio anyway!
if you want quicker acceleration change the diff,or a b25
i used a mild chip from speedtouch and it worked well

[GrindCulture]

Seems like a lot of work compared to just dropping in a B25?

[ha22]

Seems like a lot of work compared to just dropping in a B25?

or M50 maybe??

[zimmer-320i]

Yer or we could have a 6page argument again over not changing my engine!

any way i have a 3.91 diff from a 2.5, whats the diffrence between the wild And mild chip? Also is it possible to ask to have a slightly highier rev limeter? When ordering a chip. Plus weres the best place to get a chip, i know the zone does them but are they any good?

[Brianmoooore]

If Ant's zone chips weren't any good, there'd be plenty of posts on here saying so!

[zimmer-320i]

Oh i wasnt saying they were crap.i wanted to know some tech figures and info

[Brianmoooore]

Whatever anyone claims, there are only limited gains to be had from fitting a chip. All a chip can do is exploit the compromises built into the original map to allow the car to operate over a much wider range of fuel quality, temperatures, air pressure, etc., than we are ever likely to want to. It's more about 'drivability' than outright power gains.
Well worth fitting, but don't expect (or believe) miracles.
The only way to get seriously more power from an engine is to increase the airflow through it, and a chip can't do that!

[zimmer-320i]

And incresing air flow by fiting a 2.5 inlet manifold and tb plus 6 branch?

[StuBeeDoo]

im sure the 320i g/box is close ratio anyway!

With the exception of 1st, the ratios in the 320i 'box are virtually identical to the ratios in the Sport 'box.
IIRC, most "wild" chips take the rev-limit to approx. 7k rpm. Convert to LPG and you won't have any rev-limit!

[zimmer-320i]

So this chip can i have it raised to 7.5?

[StuBeeDoo]

So this chip can i have it raised to 7.5?

Why do you want to rev that high? Race car????

[zimmer-320i]

Wel it wil be a track car as soon as i have my 2.5 engine then this b20 engine is going in to a mint shell in my uncles garage!

[StuBeeDoo]

Wel it wil be a track car

In that case you want a re-map, not a chip.

[StuBeeDoo]

Whatever anyone claims, there are only limited gains to be had from fitting a chip. All a chip can do is exploit the compromises built into the original map to allow the car to operate over a much wider range of fuel quality, temperatures, air pressure, etc., than we are ever likely to want to. It's more about 'drivability' than outright power gains.
Well worth fitting, but don't expect (or believe) miracles.
The only way to get seriously more power from an engine is to increase the airflow through it, and a chip can't do that!

^^ What he said.

[zimmer-320i]

i see, so were is a good/recommended company to remap and what price am i looking at for a standard remap with a 7.5k rev limit, so basicly a remap is a tune of the chip thats in the ecu already? so i wouldnt benifet from buying a chip and then having the ecu remapped or does that defet the fact of buying the chip?

[StuBeeDoo]

Dude, you really need to have a word with Ant at A-Tech. He's not far from you. Click here
A re-map isn't cheap - we're talking hundreds, plus the engine needs to be spot-on first.

[town325i]

i wouldnt raise the rev limit to 7500rpm thats asking for the bottom end to shit its self

[zimmer-320i]

but 7k is fine


yer orpington aint far,

so if i fit a b25 do i keep the 2.0 box? i have a 3.91 diff from theos auto 2.5,

plus what else do i need to consider when fitting the b25?

[SPADGE]

Mate you seriously need to drop a 2.5 into it and forget about chipping the 2.0 and the flywheel etc...
Either way a heavy duty clutch really isn't required.
It'll be cheaper and give you a better end result sticking the 2.5 in there.

[zimmer-320i]

thats what i just said !! yer theo had a 2.5 engine not sure if he still has it??

still i would need some guidence and a watchfull eye to help me swap, i know there very simple done but i would like some one with a bit of extra experence with the m20 engines.

[town325i]

7k is fine if the engine is in good condition

[StuBeeDoo]

but 7k is fine


yer orpington aint far,

so if i fit a b25 do i keep the 2.0 box? i have a 3.91 diff from theos auto 2.5,

plus what else do i need to consider when fitting the b25?

Dude, you really need to have a word with Ant at A-Tech.

Rocket science??

[zimmer-320i]

ok im talking a 2.5 engine as i know its pointless messing with a b20, so what can be done to the b25 engine once i have that fitted, not sure what things can be done to imporove responce and drivbility, im sure chucking in a light fly wheel while im there cant hurt can it?? or would a 7k rev limit self distruct on a 4.5 kg fly wheel?

[zimmer-320i]

rocket science????

[town325i]

ive just got my car back on the road today only mods ive done is m50 injectors out of a 2ltr, lightened flywheel and removed the hot water feed to the tb and it goes alot better than before o and ive got a chip

[zimmer-320i]

2.0 m50 injectors?

whats the lightned fly wheel like??

[zimmer-320i]

oh and the hot water feed is that the two pipes on the left hand side?

[town325i]

2.0 m50 injectors?

whats the lightned fly wheel like??

.
the flywheel is just a standard flywheel that has been machiened down to the ring gear so it removes a good few kg's of it. m50 injectors just give a better spray patterns so fuel burns better so i was told.

oh and the hot water feed is that the two pipes on the left hand side?.

yes they are the ones

[zimmer-320i]

cool cool, how much did you pay for that on the fly wheel, you know there doing ones on group buy thats a one piece billet steel with the teeth are part of the flywheel

yer i think ive read that some were but ive never bothered as more fuel needs more air which can be had unless its forced

[zimmer-320i]

what did you use to make a return/loop pipe for the coolant?

[town325i]

what did you use to make a return/loop pipe for the coolant?

a new piece of pipe from the back of the block to the thermostat housing.

the flywheel i paid nothing for i had it off one of my mates that owed me a flywheel and the injectors where free borowed them from the boon yard

[zimmer-320i]

back of the block to the termostat? so cutting out them pipes completly? cant image the picture of were that pipe comes from, with out looking which i cant be arsed to do lol but still ill look and figure it out

[town325i]

it is an easy job to do even if you cant be arsed to fit new pipe just cut the old pipes and link them up

[zimmer-320i]

lol so just link the two pipes missing the tb, sunds easier to do than replacing that whole pipe, i can do it if i knew what pipes to take of and what to replace but with out some instructional pictures i think id just loop them