Re: Z6 head on a Y8 block -- It doesn't run right, advice appreciated!
 

I had to read your post about 10 times before I realized what it is you meant... but now that you restated the timing light part, it makes perfect sense. Not bad, JD... Not bad at'all.

I'll keep you all updated. I'm hoping to do this come 5'o'clock :)


Matt

Re: Z6 head on a Y8 block -- It doesn't run right, advice appreciated!
 

I've gone back to ------- with this after over a year, and I still can't figure it out. How would the fact that the timing mark is off on the y8 effect the initial timing of the motor (timing belt). Isn't the only mark we are concerned with when doing this the TDC (arrow) mark on the crank?


If nobody knows, oh well. Then we'll convert this to a for sale thread.


Matt

Re: Z6 head on a Y8 block -- It doesn't run right, advice appreciated!
 

you want the tdc mark when you're setting up your mechanical timing for the belt on your cam, but to set your distributor timing you need the xx btdc mark. If your dist. isn't synched correctly your timing maps in the ecu will be all fucked and off and could ---- you for power.

Did you ever do a compression and leakdown test on this thing?

Re: Z6 head on a Y8 block -- It doesn't run right, advice appreciated!
 

Yeah compression was good all around, I forget what it was, but all within 5psi or so, never did leakdown.

Re: Z6 head on a Y8 block -- It doesn't run right, advice appreciated!
 

Start from the beginning.

What crank pulley, what lower timing cover?

What cam gear.

What is your ignition timing at idle set to in the .bin, and has the ignition timing been set to this exact spec with a timing gun?

Re: Z6 head on a Y8 block -- It doesn't run right, advice appreciated!
 

Y8 crank pulley, z6 cam pulley, y8 lower timing cover, no upper timing cover.

Thanks guys.


Matt

Re: Z6 head on a Y8 block -- It doesn't run right, advice appreciated!
 

Set ignition timing in the ECU maps to 12 degrees. Check ignition timing. With distributor more or less centered it should align with the marks - does it?

Re: Z6 head on a Y8 block -- It doesn't run right, advice appreciated!
 

I think this is the same problem i'm having. lots O boost, but no power.

Re: Z6 head on a Y8 block -- It doesn't run right, advice appreciated!
 

For D-series 2-3 degrees can make a difference in no power and good power. Another 2-3 degrees can destroy the engine. Welcome to small bore grenades.

Re: Z6 head on a Y8 block -- It doesn't run right, advice appreciated!
 

Which mark should base timing align with? And are the other 2 marks + & - 4*?