A-series Bench Setup.
Turbo Mini Forums

Hi,

Just a quick question, Does anyone know of any companies still setting up the a series engine on a bench rather than in a car. Ive been trying for a while to get my turbo engine sorted but it just misfires under load, so ive decided to get it some professional help! The car is not road worthy and i don't have access to a trailer so moving the whole car is not really an option.

I believe Avonbar used to offer this service but have sadly gone.

Any helop would be much appreciated, I need to get this bloody mini off my drive and on the road!

Cheers!

Swiftune have a dyno but it is expensive

I seriously doubt it!

SC might be able to help, but a bit far from you.

Who is SC?

How expensive are we talking? Its becoming a garden orniment so i need to get motivated and get it moving so i don't mind paying a bit over the odds.

why not try putting an add on shipley to find somebody to transport the whole car to the rollers for you.

Your problem could be something outside the engine like the fuel pump or the regulator, so a dyno session probably wouldn't help you in that situation.

Edited by apbellamy on 14th Jul, 2012.

Specialist components,

they do a fair amount of rialing of stuff on Dyno's

Yeh, i see your point. The only thing putting me off doing this is that minisport do not deal with turbo's and im not sure who the closest rolling road are who deal with turbo's. Does anyone have any suggestions for rolling roads in the north west???

Since when did Minisport stop dealing with turbos? I know a few who have used then recently.

Class C 3rd Place Avon 2011 14.18 @101mph

Yes the guy at minisport is suposed to be vey good on the rollers.

Theres loads of rr near you, think mikeanics, peter burges.

More rr operator will tackle a turbo mini

rick

If it's not road worthy how do you know it misfires under load?

I'm pretty sure that this is a simple problem.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

And isn't getting it tailored somewhere a lot easier than removing the engine and refitting?

In the 13's at last!.. Just

Compression check is the first thing I'd do, then check ignition and ignition timing. That'll tell you enough about the engine to tell you if there's a problem or it needs tuning.

I was told recently by a friend that minisport wouldn't touch the turbo A series, maybe he was wrong, i will be giving them a call tomorrow to confirm.

I'm pretty sure its something simple as well but ive totally run out of ideas. The car is drivable, but as soon as you give it any more than a light bit of throttle it just misfires badly and will not accelerate. I have be know to test it down the road but i can't keep doing this forever without annoying the neighbours or getting 6 points for no insurance.
Its got a brand new re-con Turo carb and new regulator so im happy with the fueling.

Im runing an electronic distributor that i purchased off ebay and was supposed to be a re-con turbo item but wouldnt be surprised if its a N/A type. Would this cause me some serious issues if it was an N/A tyrpe?

I did compression test on the cylinders a few moths ago and remember them all being the same figure (8.3bar i think)

right a few things to check. It seems that your fuel pressure is not risng as boot comes on. First lesson - the fuel presure regulator does not have any affect on the fuel pressure in the float bowl. It's only job is to raise the fuel pressure above that of the float bowl to make sure it keeps getting filled.

So:
1) check that the gaskect between the plenum and carb is fitted correctly. There is a hole on the RHS (when looking at the rear of the carb). This has a corresponding hole in the plenum. There should be a hole in the gasket accordingly.

2) Check that the breather pipe is blocked.

3) check that the part throttle lean off pipe is fitted and there are no leakes in it. even a small split can cause havoc.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

check you have dash pot oil in.

A simple test, hook up a pressure gauge to the fuel line between reg and carb. Then hook up some kind of compressed air (even a bike pump will do) to the line from plenum to reg. As you put pressure to the line from plenum to reg you should see the fuel pressure increasing. If you don't then there is a problem straight away.

Edited by Tom Fenton on 15th Jul, 2012.

But what will this tell you? That your reg is working, so what? it won't stop the carb running lean.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

It will tell you that the fuel pressure is rising as it should when pressure is applied to the reg. At the moment the OP doesn't seem to know.
To me its a pretty standard starting point for fault finding a misfire onto boost.

Rob Selby

http://selbyengineering.com/

Might just be just because I'm looking at this on my phone, but some of this plumbing looks squiffy to me?

What's the black pipe that's t'd into twice and taped to the red one? Where does this go?

http://s285.photobucket.com/albums/ll56/ho...n5.jpg&newest=1

In the 13's at last!.. Just

But the reality is that you can turn off the fuel pump and, if working fine, it will still run normally. So it seems a pointless test to me. In fact if it raised as expected, it is at best a misleading result. this is because it doesn't actually tell you that the fuel pressure in the float bowl is increasing in-line with boost.

In 10 years of running turbo charged metros, i have never done this test. A RR guy one did it, saw the pressure was raising as expected, then chased his tail for an hour assuming that the fuel pressure was rising in the float bowl as the gauge went up.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Well fucking shoot me for trying to help.

2 year old fuel??

Tdc mark on crank pulley not corresponding with actual crank position?

looks like midrange pipe goes off down the back of the engine some where

http://www.fishfight.net/

Sorry Tom, Just bugs me that the FPR gets blamed when it rarely is.

Piping deffo needs a review. Looks like the actuator is fed from the part throttle lean off. And if it is it could cause the problems reported.

Edited by wil_h on 16th Jul, 2012.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph