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well after the head removal on friday were everything looke pukka so my oil burn issue must be down to the bores being glazed due to running to rich.

any way with the mega now working of to uncle ray for the session on the new engine.

plan was to run upto 16 psi aswell as doing a comparison between fixed dizzy at 28 and mega at 28.

well to cut along story short had issue with the needle valve which ment engine kept flooding ( yet another new one ordered) .

but the engine responded fine at low boost so 142 bannanas at 12 psi which was the same fiq as the 9.4 cr 1380 last year so was well chuffed now we have fewer cc's and 8.2 cr.

now of to a 15 psi run well thats when one was feeling a bit peeved as i only gained 6 bunches instaed of a whole bannana tree, but as standard she is running 8 psi so ray recon we need more preload for the higher settings as she kept dropping of boost.

so i have to wind her in some more and fit the new needle valve and along with the new inpending super sonic pace intercooler everything shopuld be huncky dory.

but still concerned on the bore glazying issue hopefully she will bed in some more as i have only done 1000 miles but you can clearly see some blow by coming out of the breathers and exhaust at full chat.

either that or i may have to get the wet and dry out and see if i can deglaze the bore with the pistons in situ and see if that helps.

or last resort it will have to be rehoned and new rings ect oooccchhhh.

i new i should have not let it run rich for sao long.

oh well we all lern buy our mistakes i suppose.

always looking for them bigger bunches of bannanas

hope this helps hoggy http://www.mototuneusa.com/break_in_secrets.htm

i would have thought that an over rich mixture would have bedded the engine in more due to diluting the oil on the bores ?

i think its a hone and rings ...ouch!

well that was a interresting read evry thing i done the opposite and every thing he said would happen seems to be happening, so looks like it may be a re ring and hone in the winter. so sod it , it will get well thrashed untill then.lol

always looking for them bigger bunches of bannanas

lol i had an argument with a mate - him saying that benross' way was wrong - seems evidence is on my side - i will use that advice and hopefully i will be ok - sorry your engines smoking though dude

its only on the over run but still not good though.

always looking for them bigger bunches of bannanas

Only on the over run indicates it's the valve guides.
Regards
Dave

have the seals come off the inlets?

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

how rich was rich??

Usually bore washing leads to bore wear - not glazing...

What oil do you use when running in?

ALex

AlexF

had the head of guides were spot on, new seals fitted as a matter of course again.

oil was coma green 20/50 spi rated SE

i recon about 8% as tones co meter needs a new filter and wasnt very accurate as i leaned it of by .5mm ( main jet height) when got to the rollers she was reading 5.5%.

she sucks up through the bores buy the looks of it, but bore were very shiny with no crathes or score which would indictae a cracked ring.

so my gues is the rings just havnt beded in properly.

always looking for them bigger bunches of bannanas

Hi,
If it's glazed up, apparently you can bung some Ajax down the air intake to shift it
Cheers,
Gavin :)

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i've heard that too gavin, not sure i'd give it a go though

hogster, what about taking the motor out & giving it a minor "hone" at home with one of those honing tools by SP you put in a drill

also i'd be interested in any info on your locked dizzy :) how you set it up etc did you have starting probs

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basicaly weld the weights up.

and she did start ok with no probs unless its realey cold outside, but she always started.

always looking for them bigger bunches of bannanas

Could you see the honing marks clearly or had they gone?

AlexF

Hi,
When mine glazed up, you could still see the honing marks, just shiney!
Cheers,
Gavin :)

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no honing marks gone except at the top of the bores between the rings at tdc.

always looking for them bigger bunches of bannanas

the top where the rings change direction?

Alex

AlexF

so my gues is the rings just havnt beded in properly.


correct hoggy

AlexF

bore flex! haha

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

i always run in on 10w40 before changing to 20w50 after 800 or so miles

fixed the flooding saga as, found my float was 3/4 full of fuel so thats sorted.

put more preload on and got 9 psi.

took out for a blast then found when i bang in more boost than 12 psi , like 15 it just held 15 than eventualy went all the way back to 11 the harder i reved it.

so either i have a actuator problem or she is blowing buy more that i thought and the turbo cant keep up.

normal running the car is sweet as a nut no smoke ect but blast her then plenty of blue on the over run and some smoke out of the breathers.

this year of disarter just gets worse for me at the moment.

always looking for them bigger bunches of bannanas

LOL!!

Blow by will not be effecting the boost you produce! If it was loosing that much down the bores you would have oil pouring past the seals and breathers.

Peaking at 15 and holding 11 sounds very much like a normal turbo delivery.

What boost control are you running - very few systems hold the waste gate closed properly, which would cause the effect you are seeing.

aLEx

AlexF

Turbo Hogster, I am having a bit of difficulty understanding your problem. Perhaps you would read this and see if it makes any sense.
Do you think an accurate compression test, ie. hot engine and throttle wide open, would give you the true situation regarding your "Glazed" bores.
If the bores are badly glazed you would be having problems with oil leaks at all the oil seals due to crankcase pressure, blue smoke on acceleration (due to poor oil control by the rings) and possible pinking when accelerating hard (due to octane reduction by oil contaminating the fuel).
Some small amount of smoke (oil vapour) coming form the breathers after a hard run would be quite normal.
On the over run the oil smoke from the exhaust would be less if it were bore glazing as there is no mixture to ignite to burn the oil to give the smoke.
If it is smoking to excess on the over run the extra oil must be being drawn in from somewhere on the induction side (With the assistance of manifold vacuum) ie. valve guides or Turbo as these are the only two places it can come from over and above the leakage past the rings.
Extra oil will not pass the rings on over run as compared to full power.
Hope my ramblings make sense to you.
What do you reckon?
Regards
Dave

well i see were you are coming from but when the throttle is closed on the over run oil will normally be drawn from either the inlet valve stems or via the cylinder walls as there is a massive vacuum in this part,

the carb side of the butterfly wont see much of a vacuum to cause oil to be drawn from the blower.

all inlet pipe work is dry as a bone.

on full throttle oil will be pushed down the bore buy excessive combustion pressures with un sctratched bore like mine.

but after to speaking to mat woods im am proberly looking at a actuator problem.

although now of on holiday so it will have to wait.

got a hot rod day at work next sunday so hopefully i will be able to sweet talk them into letting a fireman to have a blast down the runway.

if they dont and one of there cars catch fire then sod it they will have to put it out themselfs lol.

then hopefully can get a full 15 psi running readey for the pod the following week.

always looking for them bigger bunches of bannanas

i would say the bores have been subjected to fuel wash and excessive wear, causing it to then burn oil.
the honing patern should still be presant at 8000 miles!

also check the piston rings they will have a sharp edge's caused by the washing effect,

it will need a hone and a new set of rings.