advancedme

Slowly slowly...

We havent forgotton about it ;-)

ETA's..... As soon as possible under all conditions

Heads are on with 14mm studs.... Fun getting the holes in the gaskets made!

Finally got the block ready for 14mm studs! back on with the build soon!

maybe some explanation would help me understand what went wrong

 

The engine made to much power (Pressure in the Cylinder) for the head gasket and stud combination on this 100mm bore engine. The pressure in the cylinder pushed the heads up enough (Maybe a couple of thousands of an inch) so that the gas could escape into the cooling system.

 

Hope that helps

 

Dan

thanks Dan, so in your mind the gasket was 'fine' but the studs wasn't up for the task? Or maybe a mix of both?

I'm going with a bit of both.... These are the things you find out pushing the boundries!

and more pics

maybe some explanation would help me understand what went wrong

The engine made to much power (Pressure in the Cylinder) for the head gasket and stud combination on this 100mm bore engine. The pressure in the cylinder pushed the heads up enough (Maybe a couple of thousands of an inch) so that the gas could escape into the cooling system.

Hope that helps

Dan

and more pics

Cometic gaskets.

We are pretty sure the heads lifted as there are a few "grey" areas where it looks like gas could have passed. The defined sealing ring has been smudged in a few places.

Also we found some of the studs easier to undo (Still very tight) than others so I feel the studs must have stretched the tinyiest of amounts.

One pic shows an area where you can see the gasket material has been deposited onto the liner and then the water has boiled and corroded right next to it.

We will be using a bigger step, Cosworth gaskets (Not made by cometic) and larger studs to pull it all down! Its a real shame as the engine had run perfectly. Bores, bearing and especially the tappets are in 100% perfect condition!

Pics of what we found....

We will be rebuilding with Cosworth 100mm gaskets and a slightly taller step to the liners!

Build will be back on soon :-)

I'm afraid the latest update is bad news :-(

At 825BHP at the Hubs (approx 950bhp at crank) WITHOUT NOS the headgasket has failed. We're putting this down to the cylinder head lifting and are now beginning the process of stripping the engine out to see what we can do to increase the sealing loads....

DOH!!!!

This is the joy of pushing the Envelope!

Engine ran in today.

Did a quick power run at the end with no water Meth and on old VPower fuel and she made 634bhp on the wastegates at 11psi. Thats only 20bhp down on the old set-up at 18psi with water meth!

Video of the power run is here

Enjoy. Now to inspect the engine and get the nos system up and running!

Just about ready to fire her up now. All fluids filled and primed for oil pressure now :-)

Will be firing her up in the morning we hope :-)

Check out the £120 worth of inlet manifold gaskets!!!! Nissan UK are taking the Pee.... :-( Needed a window regulator today and they wanted £340!!!!

just got to tidy some spaghetti up and we shall be ready to start her up!

Fuel System complete with all Nos lines pressure sensors and Maximiser transducer!

Nos install is coming together now.

With regards to solenoid location, distance and HIT we are happy that everything will work nicely. Tony is actually running a full Wizards of Nos Maximiser with full data feed back. Fuel Pressure, Nos Pressure, Boost Pressure and TPS will all be feed into the Nos ECU to give the ideal amount of fuel and Nos.

Perfect spot for the soleniods dont you think?

We got NOS!!!!

Engine is back in and we're now working on getting the NOS system installed and functioning perfectly. :-)

Transmission back on and just the exhausts holding us up. We need studs......

1000cc of HKS Injecting goodness!

:-)

Engine built! Time to get it in!

Lovely ;-)