My '79 turbo project - Update 16/08/14
Turbo Mini Forums

Where are you booked in dan?

I have started posting on Instagram also my name on there is turbomk1golf

Nothing is impossible it just costs more and takes longer.

Looking good!, still 9 psi?

Reading up on RTS Clutches

Simon I managed to get booked in at Slark Race Engineering. And yes still on 9psi at the moment, not sure what it will be pushed to on a 8.21:1 CR. Any ideas on recommended boost people?

My build thread: http://www.turbominis.co.uk/forums/index.php?p=vt&tid=454802

Flickr: http://www.flickr.com/photos/85313398@N02/

We put 2 bar through the metro van on about that CR.

Nice one Dan. Glad you managed to get it all sorted out ok.

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1/4mile in 13.2sec @ 111 terminal on 15psi

A bar of boost would be fine on that cr , even 20psi,

Or push the boundaries like andy and run 30+ lol

rick

as long as the fueling is right, and charge temps don't go though the roof i can't see 20Psi being a problem.

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1/4mile in 13.2sec @ 111 terminal on 15psi

Don't think i will go for 30psi! Well 20psi gives a lot of room for a few more bananas.

My build thread: http://www.turbominis.co.uk/forums/index.php?p=vt&tid=454802

Flickr: http://www.flickr.com/photos/85313398@N02/

Note 2 bar was accidental and only briefly! Went well though, we settled on about 1.7 bar (25psi)

If something is worth doing, it's worth doing half of.

So the mini is miss behaving, it occasionally missfires? each time at 4krpm or close too.
It's only happened a couple of times as i have kept away from this rev range.

I haven't changed anything apart from the crank position sensor which is gapped correctly and the final drive. Could it be a dodgy sensor or something more sinister?

My build thread: http://www.turbominis.co.uk/forums/index.php?p=vt&tid=454802

Flickr: http://www.flickr.com/photos/85313398@N02/

So i am a royal twat! lol. The cause of my missfire was the plenum gasket not on properly, put it all back together for 8:00am this morning and i shat my self coming on boost through my village

Looks like my RR session is on......well happy.

My build thread: http://www.turbominis.co.uk/forums/index.php?p=vt&tid=454802

Flickr: http://www.flickr.com/photos/85313398@N02/

hurray!

All in all yesterday was a pretty shite day, got a puncture half an hour away from home. No spare or tools..so i had to wait a while for my mum to bring spares.
So with that problem solved i made it to slarks 2 hours late, but i was the last person booked for the day. Got it on the rollers and was sounding really good, bumped the boost up to 14psi and made 140hp with 150lbs/ft of torque.

So with it sounding good and the fuelling being fine, we upped it to 16pst but this time it didn't like it. It had a bit of a spaz and so Neil turned it off. The timing was checked ect but after a compression test coming back 160/170/75/75 all was not good :( And to check further a leak down test confirmed it was the headgasket that gave up.

So after all this i had to wait to be picked up on a trailer for a few hours, got home and guzzled a few beers to make me feel better.
This morning i striped it apart and was faced with it in front of me......dead gasket! It's a bit rough on the head surface and block surface, but doesn't seem too bad. The thing that does concern me is that there is two small spots of metal stuck on the bore wall :/

Could this be part of the piston ring? Or maybe a bit of ring land? Hopefully the pictures will show what i mean. And this of course means that if the spec of metal on the bore is what i think it is. The mini won't be making it to MITP, but i will be there having a few shandy's











These last two pictures also show some strange wear on the bores, not sure what would cause this?





Cheers
Dan

Edited by danb41 on 9th Aug, 2013.

My build thread: http://www.turbominis.co.uk/forums/index.php?p=vt&tid=454802

Flickr: http://www.flickr.com/photos/85313398@N02/

That's really hard luck mate! Shame as it was all going so well!!

Hope you get some answers soon

Dave the Cake

Gota be rings there. Unfortunatly thats a full strip down.

Hone and rings id say.

Bad luck with that

13.95 1/4 mile on a 2.95 fd. Carnt be that hard to beat!

Yeah thats what i first though, but looking at where it is and how small it is. Im thinking it could be the bit of metal from the gasket that blew.

As it's very close to the blow through, and also when a load of water was in the bore from taking the head off, it didn't leak past the rings. Plus there wasn't any smoking when it went.

My build thread: http://www.turbominis.co.uk/forums/index.php?p=vt&tid=454802

Flickr: http://www.flickr.com/photos/85313398@N02/

I would be amazed if that was the rings! It looks like its part of the fire ring from the head gasket. If you're careful it should scrape off ok.

As for the marks on the bores, that could be down to a bit of bore wash, washing the oil off the bores, as it only appears to be on thrusting side of the bore. Are the marks on the inner and outer cylinders?

Edited by matty on 9th Aug, 2013.

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1/4mile in 13.2sec @ 111 terminal on 15psi

Stick as gasket on it and then keep the boost down a bit. MITP here you come.

Why is it that so many people on here, myself included, get an engine running well and then cannot resist "just a little more boost " ?

Haha tadgde it's impossible to resist. I'm gunna pop a gasket on and turn the boost down a bit, i'm sure its a bit of the fire ring as you say matty.

The polished marks are mainly on no3 and no4 cylinders, but there is a little bit on both the others.

My build thread: http://www.turbominis.co.uk/forums/index.php?p=vt&tid=454802

Flickr: http://www.flickr.com/photos/85313398@N02/

Check your ignition timing before running it again.

In the 13's at last!.. Just

is it me or does it seem that RR'ds cant seem to resist running as much advance as possible to get a "flash reading" which inevitably ends in tears when the boost goes up.

it seems to me that because its so easy with mapable ignition to optimise power through the spark timing they seem to focus on that, rather than when before you had a dizzy with a fixed advance curve, the only way to really optimise the power was to focus on getting the fueling spot on.

that's my line of thinking anyway.

I've been messing about with mj on our dyno at work doing power runs on different advance settings and i was amazed how much more power you get with a few extra degrees of advance! alother easier than filing needles! but then found even 0.5 difference in afr reading would make the same increase in power as a few degrees of advance.

Edited by matty on 10th Aug, 2013.

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1/4mile in 13.2sec @ 111 terminal on 15psi

To be honest nothing was really altered ignition wise, the boost was just turned up. Timing on boost wasn't much over 20 degrees as far as i remember.

The reason we turned the boost up was because ever thing look pretty safe. Not sure if it was a dodgy gasket or what that caused the failure

My build thread: http://www.turbominis.co.uk/forums/index.php?p=vt&tid=454802

Flickr: http://www.flickr.com/photos/85313398@N02/

Welcome to the club mate.

I have started posting on Instagram also my name on there is turbomk1golf

Nothing is impossible it just costs more and takes longer.