E30 Zone

I posted a message the other day about tuning a 320i, unknown to me it is a jetronic type, i had a few tips on how to tune a motronic type like fitting a 325i throttle body and inlet manifold, will this still work with a jetronic, any tips would be great,

ps. I dont fancy fitting a whole 2.5 as the insurance wont like it too much

Megasquirt ECU, its the only way to tweak these, there are no chips for the analogue setup you have, and with a dizzy and mech advance you'll have no joy there either dude.

try a tad more fuel pressure and a few degrees base advance more, will carry the extra right to the limiter, so be careful

HTH

A bigger bore throttle body, machined head to accept a 325i intake manifold

I thought the 325i intake wouldnt work, only with a motronic setup, please correct me if i am wrong

dazzaboy wrote:I thought the 325i intake wouldnt work, only with a motronic setup, please correct me if i am wrong

as far as I was aware, it should work with either...

I await telling off though

i have a 1983 320i with l-jetronic now is running in really slow, i could hardly manage to drive 180km/h ... that is after i was messing with the timing belt and dizzy cap. first i set it up and it was really fast, it was like driving another car, but it wouldn't idle really hard starting etc.. so it's still not set up right i will need to take it to a sepcialist. so that is sure not helping...

where can these megasquir ecu be found?aand how much do they cost? my location is a bit odd Macedonia, and i'm 100% sure that i can find it here..

[quote]A bigger bore throttle body, machined head to accept a 325i intake manifold


Would this work on a 323?

A cheap & cheerful way to increase the rev limit on these (thus giving a bit more at the top end and not such a brutal cutoff in the power) is to remove the spring-loaded 'switch' on the rotor arm in the distributor. I did this with my first '84 320i and it blew away a Merc 500SL in a traffic lights grand prix

Recommend you have a cambelt in good condition before you try the mod though

Thanks argos I have got a 2.5 inlet and TB in the shed. What pressure can the fuel be raised to ?

dont use motronic injectors with Jetronic or vs versa btw, the end result will be a fried ECU

Is there any thing else that can be done???

Also what sort of money am i looking at for a inlet manifold and or throttle body (pref big bore)

I would think a 325 inlet can be got for Ԛ£15/Ԛ£20.
I have got one in the shed waiting to go on.

All the pipes are the other side on the jetronic engine so fitting the 325 inlet would not be that easy.

Anyone ever done this conversion then? Also, which way do you rotate the dizzy to get the timing more advanced?

Cheers!

If I was you I would fit motronic. easy to do on a 320.

Is it really worth the effort for another 4bhp?

I tried turning my car's dizzy a few degrees anti-clockwise today; it seems to have made it a little more responsive, though the car's idling a little high at around 1,500rpm (also tried adjusting the throttle stop, to no avail).

Am I correct in thinking I should turn the dizzy anti-clockwise until it just begins to 'pink' going up a hill in 4th gear, then turn it back the other way slightly to get the optimum setting?

Cheers!

Am I correct in thinking I should turn the dizzy anti-clockwise until it just begins to 'pink' going up a hill in 4th gear, then turn it back the other way slightly to get the optimum setting

old scholl method, works though, used to be a fave trick on the mk1 gti, 4 degrees base timing certainly pepped mine up