E30 Zone

Mind you, this problem occured almost literally over night... I drove it from Swansea to London one weekend -- without vibration. The next weekend, I took it from London to Southend, and that was when I noticed the judder. Could this be something caused by bad fuel? Without driving the car more on a...

Sorry, I meant: 'Does the 320i use the 260 'box?'...

That's what I was fearing... I know it's not the prop centre bearing, as this was replaced recently after the clutch was changed. Does the 320i use the 240 'box? I thought it was the 240...

Anyway, I guess I'll just have to put up with the vibration for now.

Hi Guys! Just wondering if anyone has experienced the problem I'm having now with my modded 320i. When accelerating in 2nd gear, I get a slight judder/vibration from the rear at about 3000rpm. This does not occur at any other engine speed, or in any other gear. The car runs a 3.91 LSD, but it's fill...

Cool, that helps. Mine revs to 7,000 (when the occasion demands...), so it would appeat that it's just the idle that's affected.

Yeah, I'm pretty pleased. That figure was achieved with standard unleaded. Performance seemed noticeably improved with a full tank of Shell V-Power. I can't really afford to change the chip for now. And to be honest, the car does drive very well with the Superchips chip. I'd recommend this conversio...

Thanks Stuart. So, you had the same problem? It's annoying. The idle would occasionally fluctuate with my old TPS, but not like this. Did the running of your car improve with the new TPS? Mine seems to drive fine, but I'm just concerned that, after all the time and effort of the throttle body conver...

Hello All! Right, I've put my old 320i injectors back on the car, and I have to say it does run pretty well. Power is up to a minimum of 115bhp at the wheels, arriving at 6,250rpm. Throttle response is up, and the engine feels as if it's far freer-breathing. Torque seems to have suffered, but if you...

Well, on the rollers, the car wasn't overfuelling. But, yeah, I'm going to put the 320i injectors back on. I have an adjustable fuel pressure regulator anyway, so that should make it easier to find the best flow rate.

Cheers, Stuaty. I'm going to try putting the original injectors back in. The 325i manifold will have to stay, as I've opened up the inlet ports a little to accommodate it. We'll see...

I have a Superchips chip (I got it for a reasonable price). The injectors that came out of the car worked fine. I think I misread a comment; looking back over the thread, nobody said that the larger 325i injectors were necessary.

I'm thinking of putting the old ones back in.

Right, here's an update of progress on my car. I've fitted the TB, manifold, and injectors from a 325i onto my slightly modded (and chipped) 320i. I've opened up the inlet ports, and had the car on the rolling road. And the results are disappointing... Power is the same as before at 110bhp at the wh...

You're right Andyboy. And a 320i with 170+bhp would have presented the BMW marketing men with quite a challenge in flogging the 325i. I've always felt the 320i was 'strangled' for this reason to avoid a bad case of sibling rivalry. Personally, I prefer the sweeter nature of this so-called 'lesser' M...

I guess I'm going to find out. I may put the car on rollers after I've completed all the work. I know for a fact that my car is pushing out 140 bhp as it is. I'll certainly keep you posted. In any event, I reckon it'l probably bost torque more than outright power, which is no bad thing. Any ideas fo...

OK people: you lot have convinced me. I'm going to change the TB, manifold and the injectors.

Now, I need answers on this... Will I need to readjust the FSE boost valve to supply more fuel the bigger 325i injectors?

Thanks for those pics. Can the grinding work be done with the head in situ?

And just to be clear, will my 320i injectors fit the 325i rail and manifold?

Thanks, Andyboy. How much do you reckon the inlet ports need to be opened up by? I'd be kinda scared to get swarf into the head. When you say: 'You will need to swap the 320i injector rail over to the 325i manifold.' Do you mean I'll need a 325i injector rail as well, or just fit my exiting one onto...

Cheers, Murran. I'll try to pick up a TB and have a fiddle. Things is, the car runs pretty well now, so I'm kind of reluctant to tinkle. But, I can't help feeling that power is being sapped by the current restrictive TB... We'll see.

Mosley's Garage in Llandeilo, South Wales -- owned by Vince Mosley. He's done a lot of work on my cars over the years, including a previous 325i Sport that I used to own.

I'll have to check the bill, but I got a good price on the Superchips chip.

Thanks Guys! You've given me lots to mull over there. I've had my car run on the rolling road, and it's already pushing out about 140 brake with a quite a lot more torque in the mid-range. I had thought about sawpping the manifold for a 325i item, but it seems it may be better to just adapt my exisi...

Hi Guys, I have a 1990 E30 320i, which has a few mods, including a cold-air induction kit, a Superchips chip, Hartge sports exhaust, FSE Boost Valve and a 3.91 LSD. Oh, and it's got full M-Tech sport suspension and a pretty useful fast road brake set-up. Anyway, the changes to the mapping and breath...

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