Dave J
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| posted on 27/6/07 at 11:49 AM |
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RV8 ignition advance
I'm trying to figure out the optimum ignition advance at idle for my RV8.
Edelbrock 500 carb, Mallory dual point dizzy etc.
I've heard people advance their ignition until it just starts to pink,and then back of a couple of degrees. I cannot use this method as the wind
noise pretty much distorts any engine noises.
At the moment I'm at about 6 degs BTDC, I've heard of 8-10 degs on Rover V8's
I'd be interested to know what you guys with similar setups have your ignition advance set to.
Thanks
Dave
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craig1410
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| posted on 27/6/07 at 11:57 AM |
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Isn't the engine most likely to pink in high gear at relatively low speeds? For example, try driving up a modest incline in 4th/5th gear at
30/40MPH with full throttle. Wind noise will still be present but I would have thought you'd be able to hear the engine.
Alternatively, get a couple of lengths of rubber tubing and run them through the bulkhead to a position on either side of the engine block and then
stick the other end in your ears as you drive. Even better, get an old stethoscope and modify it! (ps. I'm only semi-kidding...)
Ideally get it done right on a rolling road.
Cheers,
Craig.
ps. Use Shell V-Power petrol and you should be able to run 8-10 degrees at idle without any problems unless you are running higher than 9.75:1
compression.
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David Jenkins
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| posted on 27/6/07 at 12:00 PM |
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Dave,
You may find this page useful - LINKY - as I had the same problem with wind noise.
There's also a link to an associated topic on Pistonheads on there.
HTH,
David
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ed_crouch
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| posted on 27/6/07 at 12:58 PM |
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My car runs at about 8BTDC at 850RPM, with the vac advance plugged.
3.9 Flapper EFI Rover engine with a few mods. Nothing earth shattering.
Tbh, the rover engines seem quite relaxed about timing, so I shouldnt worry that youre going to haemhorrage BHP by having it a degree out. I even
managed to get the dizzy in 1 TOOTH too far advanced the other week. Took it to B&Q (Its a TVR, so I was only buying a packet of screws!), and
whilst it wouldnt accelerate properly, it did still run with only slight pinking.
Tit!
Ed.
I-iii-iii-iii-ts ME!
Hurrah.
www.wings-and-wheels.net
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Dave J
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| posted on 27/6/07 at 02:09 PM |
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Thanks for your thoughts and suggestions guys and the links David. There's some great ideas on Knock detection. Amazing what you can do with a
bit of tubing and a bake bean tin.
Once the rain stops, I'll be able to give it a go. Mind you, a boat might be more sensible at the moment.
Cheers
Dave
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jollygreengiant
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| posted on 27/6/07 at 03:26 PM |
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quote:
Originally posted by Dave J
Thanks for your thoughts and suggestions guys and the links David. There's some great ideas on Knock detection. Amazing what you can do with a
bit of tubing and a bake bean tin.
Once the rain stops, I'll be able to give it a go. Mind you, a boat might be more sensible at the moment.
Cheers
Dave
Don't worry about the weather mate, the rover V8 was originally a marine outboard engine in america, before Buick got hold of it, so it would be
quite at home with a bit of water.
Beware of the Goldfish in the tulip mines. The ONLY defence against them is smoking peanut butter sandwiches.
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Dave J
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| posted on 27/6/07 at 03:48 PM |
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quote:
Originally posted by jollygreengiant
quote:
Originally posted by Dave J
Thanks for your thoughts and suggestions guys and the links David. There's some great ideas on Knock detection. Amazing what you can do with a
bit of tubing and a bake bean tin.
Once the rain stops, I'll be able to give it a go. Mind you, a boat might be more sensible at the moment.
Cheers
Dave
Don't worry about the weather mate, the rover V8 was originally a marine outboard engine in america, before Buick got hold of it, so it would be
quite at home with a bit of water.
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