Good luck duncan hope it all goes to plan.
If you had been closer i would of offered some free help (probably useless free help mind) lol.

 

Good Luck with the build Dunc..looks like the car's been going very well!

 

How many miles has your block done Duncan, in total, or is above the total amount?

I'm looking at going the linered block route myself in the near future, so this information would be of interest, all things being equal.

 

Good luck Shaun...

 

dont do it shaun
imo. the ones that work are few and far between.
i had 3 cracked liners and 2 that dropped.
think long and hard mate, if it aint broke dont fix it imo

lots of good luck if you do go down that route tho

andy h

 

I believe Darton liners are the ones to go for and it is all about the process surrounding the liner fitment/machining and piston to match more than anything else iirc.

Remember I am still on an OE 2.5 block case and it has taken (so far) a right old pounding for 16k+ miles, you can't keep expecting reliability imo with the use/power I want to throw at it.

Duncan's total mileage will give some extra info into the mix..... don't forget his rings/pistons went. I don't seem to pick up that the liners or block were actually at fault, just a knock on from the ring / piston damage that damaged one liner.

Linered 2.5 is one of my options, so I am interested in ones that seem to have a proven history.

 

Andy he will probably get proper liners fitted not dog tins

But on the other hand if i could start again it would definately be a ej22 with a 2.5 crank

 

Linered is good imo - darton are the ones to have.

The linered block had done 35,000 miles since the original build at 450-600 bhp. All but one liner are fine and the old liner will be pressed out and a new darton liner put on once i can get one from the states. It will probably do another 40,000 miles beyond that with no issues.

The piston rings going were the reason for the damage. There is zero droppage, zero ovaling on any of the bores.

If done properly they are extremely strong and reliable but there is always a weakpoint. In this case it was a combination of a lack of lubrication in the bore caused by the very effective oil scraper ring on the piston and the bioethanol fuel. There was a small amount of det damage but any race engine will have this - if it doesnt then you arent pushing it hard enough IMO.

Anyway ... new block with new darton liners is ready and machined by Dave Knight Engineering who have an excellent reputation and people shouting about how good they are in all marques. They talk plain english and do what they promise.

I will pick this up in the morning and along with new Mahle pistons (the stronger version than the ones i had in there) supplied by Mark at Lateral and get them back to mine ready for Tim Farmer (http://www.sub-bus.co.uk/) who used to be at Zen and I to build up the short block tomorrow afternoon/evening/night....

Thursday to bolt it all together (with Julians help) and possibly drop into the car. if not this will happen on friday ready for running in, some map changes and a trip over to see Paul to do some alignment on it ..

Fingers crossed all will go well and I will drive it down to Brands on sat afternoon, drop the running in oil out and have a nice barbeque with Steve and Soos.

Huge thanks to Mark at Lateral, Paul at Zen, Dave Knight, Tim, Julian, Donna and anyone that knows me

 

What no 35R Duncan

You know you have the bug now

Good luck this weekend bud and hopefully build will go without to many scars

 

Very tempting but not this tiime Colin

 

Go twin scroll Duncan

 

love the dog tins commet neil pmsl
they were very thin thow
you forgot the m14 studded bar cut off with a grinder for my head studs, dont think that helped my liner problems he he

 

You are kidding about the studs right?

 

if he's talking about the same engine builder as i think he is,that fitted the studs.then no he wont be kidding.

 

 

Paul my studs looked like this



Banny

 

major hiccups yesterday. It is NEVER easy and yesterday was a day when it wasnt even just hard.

The plan changed at least three times yet again due to circumstances beyond my control.

So.... I should have a revised block back from the machine shop again tomorrow. This time bored out to 99.75 to fit some Cosworth Pistons too that were grabbed from Cosworth right at the close of play yesterday and dropped over to the machine shop as they were closing the doors.

Tim isnt around to help me build it though so my Julian (best mate, volunteer team mechanic, sausage roll provider and cheereruperer) and I are going to build it over at Zen with the boxes of parts that I had nicely laid out in my garage and get as much as we can do built. Fingers crossed this will be a full long engine but i suspect there will be yet more dramas and disasters.

The Fat lady is clearing her throat but Paul and I keep hitting her with a big stick telling her to shut up. I will not be beaten lardy woman (at least not yet)

So many thank-yous I cant even begin to list them.

 

Never say never mate. Good luck

 

Best of luck Dunc.

 

Fate won - I will not be at Brands.

Gutted is an understatement.

Thanks to Paul and Julian for trying everything with me to make it happen - it just wasnt to be.

 

Want to run my forged 2.5 in for me?

 

lol

Thanks for the pm of help Daz - very generous of you and beyond the call of friends. Got your pit pass here ...

 

Thanks Duncan,

The offer of the short motor was a genuine one until i realised you only have 11mm studs. It would have been good to put it to the test.

 

nope,

all different lengths too !!!!

 

mine didnt.

but you do have what looks like very similar if not identical dog tins tho

 

Cheers.

 

Sorry to hear that Duncan. Always a pain when things don't go to plan.

This may be a dumb question, but what's the point of liners?

 

The standard liners in the 2.5 engine are very thin and are not the strongest in the world. The Darton ductile liners are as strong as **** and so long as they dont drop (this has happened to some people) are virtually unburstable.

 

It would be interesting to get some stats on how many people have suffered a liner drop and if there was any particular event that caused a liner drop...if is there an underlying cause that is...

 

yeah it would.