InsaneSwede's Astra MKI

[ashtal]

Thats major damage, wedging would solve this problem tho? Whats the piece of wire left where the liner used to be? Sorry for jacking the thread!!!

[jonlem]

Ouch !

Wire is used a sealing ring for the headgasket to dig into Ash. If you have ever heard of Cosworth YB engines being Wire Rung that is what it is. Mainly done before the days of proper headgaskets but I don't think there is a proper gasket for the Zlet unlike the HKS gasket that is available for the CLet.

[Pantera]

Ouch !

Wire is used a sealing ring for the headgasket to dig into Ash. If you have ever heard of Cosworth YB engines being Wire Rung that is what it is. Mainly done before the days of proper headgaskets but I don't think there is a proper gasket for the Zlet unlike the HKS gasket that is available for the CLet.

I was running with the mls gasket only and under high boost was pressurizing the water system, thats why i fitted the rings

[Pantera]

How much power did it produce?

It made 485hp when the block broke

[InsaneSwede]

It made 485hp when the block broke

any mods onto watercirkulation?
Really low power for that huge amount of boost, small turbo?

[leesturbo]

Yes you read it correct.
Exhaust opens a little bit earlier than my camgrinder had plans for, just to get some hard pulses out the manifold to bang the turbine.
Therefor they are a little bit more closed than inlet at overlap. you also get stable idle to have more lobesepartion.
And i can never understand the advantage of getting rid of overlap adjusting inletcamshaft, you sacrifice so much torque retardig the inlet, better advancing exhaust you benefit two things.
And the cams are running hydraulic lifter.

an early vid, got it to oscillate less later, but no vid on that
YouTube - showoff

play with the idle control map more you will get a nice idle it just takes time.
the best i got it was to scale the map so small changes in duty occur around idle

i think there is a setting to make it only change by a small % too ?

[InsaneSwede]

leesturbo,, yes there´s very small amount of altering to get it stable, around 0.3%

Yesterday i was running into another idelvalvebug..
The BOV didn´t work.

well, i just have to shut the valve more closed in high rpm, that might hurt 'softlanding' i have on the engine
I might reconfigure rpm scale to get more points around 800-1400rpm to get more points to map just around idle.
That might help.

[Pantera]

any mods onto watercirkulation?
Really low power for that huge amount of boost, small turbo?

No mods to water circulation. Yes it isn't a very big turbo T3/T4, but i don't need any more power, i just need traction. I'm already doing 10.7 1/4 mile @ 231km/h (144mph) on a bad track. 1.8sec 60ft

[jonlem]

144mph ! Crikey, thats getting on with it

[InsaneSwede]

No mods to water circulation. Yes it isn't a very big turbo T3/T4, but i don't need any more power, i just need traction. I'm already doing 10.7 1/4 mile @ 231km/h (144mph) on a bad track. 1.8sec 60ft

If you look at an Cometic headgasket you can see some of the holes needed.
and seeing this and studying why you can see it´s for evakuate gasbubbles(steam) from lokal small boiling areas, those can get really big when running hard, as in Dyno for example.
Or using maxpower for a long time, like on the strip or topspeed tests.
You can´t see them with you eye, but they are there i promise you.
And as i said yesterday, water aren´t compressable. and we need water pressurized at all spaces in coolingsystem.
If we don´t the actual areas will flex more then with water behind them.

And if running an coscasthead there are more areas to drill for evakuating gas.
There are no big holes needed, just about 3mm in certain locations.
for air to reach top of coolantlevel.

[Stefan]

Sonic check the block. I have done loads now. They vary quite a bit on bore and deck thickness. Some can go down to 1/8" thick bore wall. Add erosion from cavitation and high cylinder pressures/side thrust to a block with a lot of core shift and things will break. Not just at top of bore but can split and break further down also.

[Pantera]

If you look at an Cometic headgasket you can see some of the holes needed.
and seeing this and studying why you can see it´s for evakuate gasbubbles(steam) from lokal small boiling areas, those can get really big when running hard, as in Dyno for example.
Or using maxpower for a long time, like on the strip or topspeed tests.
You can´t see them with you eye, but they are there i promise you.
And as i said yesterday, water aren´t compressable. and we need water pressurized at all spaces in coolingsystem.
If we don´t the actual areas will flex more then with water behind them.

And if running an coscasthead there are more areas to drill for evakuating gas.
There are no big holes needed, just about 3mm in certain locations.
for air to reach top of coolantlevel.

Are you picking up any excess wear on the main bearings next to the thrust bearing ?

[InsaneSwede]

I couldn´t notice any wear when having engine apart last year.

The only thing there were was E85 related.

[InsaneSwede]

Pantera!
question again.

what cylinderdiam did you run?

[InsaneSwede]

took a little ride,, here in Sweden i might think i´m about the first one for the season to cruise with the hobbycar this year *lol*



ride were about 10ft

[InsaneSwede]

and i must say,, first impressions..

idlevalve,ITB´s and hydraulik clutch made an miracle.
it´s like driving my other Vauxhall´s. felt very nice.
When starting to let the clutch pull the car a little the idlevalve kept the rpm at the same spot, only one word: Success!

[Jack]

Badass. That colour really suits it. Glad to hear everything is going well!

[leesturbo]

looking good.
when is your no snow season as your gona want some traction with that beast

[rc]

looks soo cool and subtle

[Pantera]

Pantera!
question again.

what cylinderdiam did you run?

87mm

[InsaneSwede]

ok..
What camshafts did you and your friends run?

i´m trying to figure out if you had really high cylinderpressures, one can get that with very mild camshafts.

[InsaneSwede]

well, decision has been taken.

As Pantera had some problems i decided to do what i can do now when it´s too late.....

Turbo and manifold has been taken off, now i´ll drill and thread holes and just slightly let some M6 screws touch the liners.
Will take som pictures tomorrow when work is starting.
will use an 'watch' to see that i DO NOT alter roundness of liners.

[turbo gav]

well, decision has been taken.

As Pantera had some problems i decided to do what i can do now when it´s too late.....

Turbo and manifold has been taken off, now i´ll drill and thread holes and just slightly let some M6 screws touch the liners.
Will take som pictures tomorrow when work is starting.
will use an 'watch' to see that i DO NOT alter roundness of liners.

Yeah take plenty of pics of that mate

[jonlem]

What were your reasons for not using the "concrete" again in the block ?

Curious as in theory judging on the way the yanks use it I'd of expected it to be more than adequate, was it causing heating issues and generally the yanks do fill the whole block and then run them with no water which obviously you can't.

I can't say I'm digging the idea of putting load on the liner from one spot or even two although goign from your previous work its not going to be as simple as it sounds.

[InsaneSwede]

why i didn´t go for concrete?
well, new block is thicker in the liners so i figured it wasnt needed.

but pantera has ran into problems, that´s just enough for me to consider it for safety again.
but this time no concrete as it would make the liners oval.