forged pistons and or decomp

[Beaniemoo]

So was mine lol

[sexy_gt]

Originally Posted by Beaniemoo

So was mine lol

yeah i see what happened, unlucky.

[yr51ocw]

Those pistons look haggared. The dents in the top of the are a perfect spot for det to occur from due to them being hot.

Cant really see from the pistons too well, but the edges of the pistons look nackered too around the crown and around the piston recess. Wear/chips off the edges of pistons are a common sight with an engine which has been knocking before. As the shockwave caused by uncontrolled combustion reflects back off the cylinder wall, so the edge of the piston receives double the amount of shock as the other areas of the piston.

If I saw them in an engine I was having built I would instruct they be used as paperweights.

[axsaxoman]

pistons look like old damage --just too lean --maybe been stripped before and cleaned up+ new rings .
If engine was running fine and no heavy breathing ,then don,t strip it .
the pistons are really buggered ,so no point ,if they are happy now just run them --nothing to loose .
If they were damaged + not cleaned up there would be marks on the bores now
there must be at least vts rods in it as the vtr rods are not fully floating .
run it til it blows --maybe with correct fuelling it will stay together--make it plenty rich --this is presuming that it was NOT breathing before you stripped it and as there is no signs of fresh oil on top of pistons it would look like it wasn,t running that bad.--maybe just wrong plugs fitted which burn,t the tips off and started the problem



the clutch --just plain worn out --check the splines(look very worn) and the fingers have probably gone due to wrong release brg fitted --or maybe just not up to the power it had in the first place --bin it and start again

[sexy_gt]

i plan to use bottom end as it is + i must fit a baffle. i think i need to fit a vts sump as there is a sensor in it.

can i do that?

also head gasket, are vtr and vts the same? as im using vtr bottom end and vts head...

it was running well, there was no oil on top of pistons, just some black deposits. little bit sticky but not thick. not quite dry and carbon like.

im not asking this to run megga power just 1 bar from a c3074. as it was before but with 16v head.

clutch/ yeah ive budgeted for a new one.

[blackie_2k5]

WOW- they look alot worse on laptop then they did on my phone lol, looks like a few of them have suffered some meliting/det at some point

i retract my previous statement about a rebuild, it wouldnt be worth the money it would cost you for one of them to shatter or crack, i bet youll still get a fair few miles out of it before it gives way..

however if it has got rods in...it may be worth you splitting it to rebild another lump with the rods as theyll probs end up fucked if/when it does burst

so would save you buying more for a new engine???

[sexy_gt]

Im running this till she pops. Ill build a new one then.

Its going to be interesting how it lasts with a proper good map.

[blackie_2k5]

get it mapped rich like john said, should help it run a little bit cooler

i think itll probs last a fair bi tbh mate, if its been running well like that then it should get a few more miles in before it pops

probs wouldnt last very long if it was turbo like.. but being s/charged will help a bit

[Dean-VTR]

Originally Posted by blackie_2k5

get it mapped rich like john said, should help it run a little bit cooler

just dont have a bonnet on, itll be alright

[blackie_2k5]

Originally Posted by Dean-VTR

just dont have a bonnet on, itll be alright

external cooling is good....internal cooling is better