The V8 Owners Forum -

Are you sure you have that amount of run-out? How are you measuring it? Assuming that is total indicated reading hence double the amount of eccentricity. I don't know what value will give you a problem but if I'd bought a, presumably expensive, new item and found that much error in it I would not be...

Depends how you are determining "want" ? First of all lets just forget about the timing table for a moment, this is early days with this and I'm focussing first on getting the idle condition something like right as I was having issues in this area. As a test I decided to see how the timin...

Have you verified base timing ? ie, flatline timing at 0deg, 10 deg, 20 deg and check/confirm with a timing light ? Thanks for the feedback StevieT. Yes. I'm not really sure what you mean by 'flatline' but I checked the timing at 10° using fixed advance (regardless or RPM or vacuum the advance will...

Where does the MS pick up its firing point? Presuming a toothed wheel with a tooth missing? If so is the MS actually fire the spark? At the gap, at the next tooth or something like 15 degrees after the gap…….I seem to remember reading about 20 years ago it was the third option above. So the MS coul...

That does sound very high. I'm running Speeduino (very similar to MS2) and I'm idling at about 9/10 degrees. You can add photos directly into your post by using the 'Attachments' tab below the 'Save draft/Preview/Submit' buttons (or as it suggests just dragging the picture files into this edit box)...

This may ring a bell with some of you in the collective as it's something I've been working with for a few years now, unfortunately due to other life pressures and being lazy it's still going on. Some time back I converted my ignition to run via ECU control from the previous distributor based system...

The RV8 engine doesn't have much in the way of galleries, particularly water, on the head/block interface so I guess it's possible to get away with it to some degree if both faces are flat. Doesn't mean it's a good idea to do it though, just as well you've spotted it.

What cam are you running? One with high overlap will result in lower than expected compression test values (although a 15PSI spread seems a little high) and higher than expected manifold pressure (lower vacuum) at idle. I don't understand hg but 11 seems like that will be about 62.75kPa. Mine runs a...

Looks to me like you need a new distributor/oil pump drive gear, neither picture indicates a camshaft problem.
The gear is a seperate part.

I wanted to reply but it would only be an educated guess based on my experience rather than knowing so I got put off. Yes my educated guess is that they are the same - BUT if wrong the drill hole goes through a water jacket or something else. Hence yes I want responses from people who actually know...

I wanted to reply but it would only be an educated guess based on my experience rather than knowing so I got put off.

Looks a bit bigger all over, may just be the picture. Didn't some Jag's have a similar throttle?

Don't see why not, presuming the Thor TPS is just potentiometer as per the earlier type then the output would be between "just over 0v" to "just under 5v". Only issue I'd see is if the closed throttle output was too high as there is an upper limit for the minimum voltage (0.078v ...

I can't measure at the wrist pin due to valve cutouts and piston dishes, so I am measuring at the inner most edge of the piston, with a DTI and rocking to get two measurements, then averaging. I am zeroing the dti on the deck face adjacent to where I am measuring on the piston. I'm trying to visual...

Do you have 100% certainty in your measurements? I'd be double checking and checking again before I removed any material. Would it be possible to switch the piston & rods from cyl' 2 to 8 see if you still get the same values - This would check that the issue is not in the piston/rod build-up. If...