CossieRich

iTrader: (1)

Dave,

please edit that mate.I typed it and then removed it as i dont want this post going the way of oher posts that involved me, you, Rod (when he psoted) Ade, and Mike

CossieRich

iTrader: (1)

Im know Mike can take it, but every post we get invloved gets a bit ott. Funny, but still, this is very interesting. Desperate for Mark to post though

Mike Rainbird

iTrader: (3)

Then step away from the keyboard .

Rich,
Until Mark confirms the crown thickness, I believe that it is a combination of all the factors I have mentioned.

I have NEVER seen a hole literally PUNCHED through a piston like that, and the only conclusion I can reach is back pressure from the turbo causing high internal temps / pressures, combined with what "looks" like a piston with crown thickness too thin .

Anyway this is only MY opinion from the evidence provided. Mark could confirm / quash this with the back-pressure readings from the turbo when it was on the dyno (if these were measured) . There are missing links in the info - back-pressure and crown thickness.

If these are acceptable, then it has to be a rethink . I'm struggling with any alternative ideas, as I STILL don't think it is the exhaust manifold...

Mark WILL get to the bottom of it though, and anything we post is just best guess from engineering experience, using what little evidence is provided .

Anonymous

Anonymous

...i like the way everyone is guessing

MAD Ade

iTrader: (1)

I've just spoken to Mark, these were the figures he gave me

Mike Rainbird

iTrader: (3)

That's guessing, going by the AVAILABLE evidence - it's better than just repeating "It's the 2wd manifold", just because someone TOLD you this, without assimilating the evidence and using your OWN brain .

If you look at ALL the posts by people who UNDERSTAND manifolds, THEY disagree with you .

The only people who AGREE with you, are the ones you would EXPECT to (as they have ALSO been told this is what it is, and aren't allowed to think for themselves ).

Mike Rainbird

iTrader: (3)

Shit, I thought we'd cracked it, but it's obviously just the picture giving false impression of thin-ness .

I'm still sticking with the back pressure from the turbo being the issue .

RichardPON

Is there a pic of the spark plug on that cylinder?

I presume it's okay?

Interesting thread though - long may it continue!

Anonymous

Mike the source builds better and faster engines than Harvey/Reyland ..your all shitting in the dark with no toilet paper..i am just stating what it probably is because everything that you lot come up with is insulting the MAD

CossieRich

iTrader: (1)

Need Mark to post his findings really

Ryan

ade, best of luck with finding the anwsers

you on msn? need to chat about the rod/pistons setup

Mark Shead

Mike you have seem to have done a lot of self promotion for RB motorsport however you are completly wrong with you findings and most unlike you to give a opinion like this based on a guess ,
The problem with Ades engine has shown itself to happen when the wick is realy cranked up on race fuel, We ran faster on pump fuel in testing than race before when the problem happend,
I have seen this problem before on another type engine with a exhaust manifold that has a sharp exit to the turbo causing high back pressure and egt at the exhaust port which caused the same kind of failier,
If you look at a 2wd manifold this has a angle change within 2inches of the exhaust port on no 2 and 3 which causes the same type exhaust back pressure at the exhaust port although not until a much higher level as we have seen over 640hp and remeber my cars still make max power at the end of the straight with no high intake temp and this is where the problem happens,
The only reason why we didnt look in to this the first time was I did not biuld Ade's and incorrectly blamed his biuld the first time sorry Ade, However I did over see him this time to check the biuld and all was correct and then mapped on dyno,
The spec of the CP pistons I use were rated higher than yours the crown thickness on Ades is 6mm and Rods 5.5mm they are the same basic spec the only change is Rods are thinner due to the larger capacity of Rods engine, You cannot correctly judge for the pict of the piston how thick they are because it melted the material away so I will accept a apology for this Mike .

Mark

msport

Didnt quite get it.. Did you have higher egt at cylinders 2 resp 3? How did you manage to measure the BP for those pipes?

Martin-Hadland

iTrader: (2)

Ade.. I really hope you get this sorted and if i can help in any way i will but not on this post as there are far too many wankers!

CossieRich

iTrader: (1)

I hope im not included in that statement Martin

Martin-Hadland

iTrader: (2)

not at all mate

CossieRich

iTrader: (1)

I do have a vague idea who you are reffering to though

escossie560

So what sort of temps are we talking pre turbo,as a mater of interest.Because that is a fine hole?

Martin-Hadland

iTrader: (2)

You need to see the inside of the piston to understand..

escossie560

when you say inside ,,, do you mean design or material composion?

Martin-Hadland

iTrader: (2)

i should have said underside!!

escossie560

so it design /thickness, but even with a thick crown once you reach a high enough temp damage will occur even if not terminal or is it to do with heat build up in the crown. if so oil cooling would help, would nt it?

the original

surely 'in-cylinder' pressure increases due to high backpressure are negligible compared to cylinder pressures after ignition/during det. anyway?
or am i missing the point?

cossiedave

iTrader: (1)

i,d say one fuel pump and std fuel lines made it go bang

rapidcossie

mines didnt go bang and its the same set up as Ade.

so its not a fuel delivery prob

Ian M500COS

Is one 044 fuel pump and a standard fuel line sufficient for a top speed run on a "600" bhp car?

I'd say it's like having a blow job off an elephant - i.e. the pipe aint big enough!!

cossiedave

iTrader: (1)

so y did,nt go bang on the dino. becus norris has two 044 pumps with -6 fuel lines and adde has one pump and std fuel lines. think about it

rapidcossie

are all these people who are saying" they think" etc etc actually testing their theorys?

cossiedave

iTrader: (1)

ya as it was deting then hay presto woosh bang o fuck

rapidcossie

too many people think X,Y or Z just beacuse its been written on passion ford

Ian M500COS

The proper way to do it - I wouldn't expect anything less

But if an engine goes fine on the dyno but went bang in the car, I'd look at the installation if it were me.

cossiedave

iTrader: (1)

it,s comon sence to have 2 pumps or in my case 3pumps .at least yours wont go bang mad yum your doing properly not like the shonky old garage in bristol do

cossiedave

iTrader: (1)

do you really think you can here det at these sort of speed,s