Radial Testing Tires Moving and - Page 3 - Chevelle Tech
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post #31 of 37 (permalink) Old Jul 1st, 20, 5:10 PM Thread Starter
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Quote:
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Quote:
Originally Posted by JBoggs View Post
I'll let you know how long the DBR's last, with the sidewall and the wear indicators, I'm thinking it won't be a long life tire.



Far as fuel system, no, it's exactly the same as the previous years. Ignition and some wiring do have some updates. I went to a Moroso Crank Trigger. Believe it's gaped at .060 (I'll re-verify). I did re-phase the rotor too. Checked timing 3 or so different occasions. Also the plugs have a lot of runs on them. I could drop a new set in? Do you think it would be more likely ignition?
Could be as simple as plugs. Gap at .040"-.045"?
I think .030. I'm going to check it all out this weekend. I'd love to fix the thing without a lot money. Might go ahead and put new plugs in it to be safe.

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post #32 of 37 (permalink) Old Jul 1st, 20, 8:03 PM
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Re: Radial Testing Tires Moving and

I would try new plugs first. I did have one go bad on me once and it started popping. I would keep the gap .030-.035. The smallest gap you can use is the best. Keeps wear on the ignition parts down and prevents blowing the spark away at high rpm.
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post #33 of 37 (permalink) Old Jul 2nd, 20, 8:36 AM
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Re: Radial Testing Tires Moving and

Quote:
Originally Posted by JBoggs View Post
I'll let you know how long the DBR's last, with the sidewall and the wear indicators, I'm thinking it won't be a long life tire.



Far as fuel system, no, it's exactly the same as the previous years. Ignition and some wiring do have some updates. I went to a Moroso Crank Trigger. Believe it's gaped at .060 (I'll re-verify). I did re-phase the rotor too. Checked timing 3 or so different occasions. Also the plugs have a lot of runs on them. I could drop a new set in? Do you think it would be more likely ignition?

Looking forward to your DBR results.



The breaking up sound like ignition to me. Do you have an old HEI to try? You could even prove it out on the street with a couple spirited runs.

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post #34 of 37 (permalink) Old Jul 2nd, 20, 8:49 AM Thread Starter
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Originally Posted by bracketchev1221 View Post
I would try new plugs first. I did have one go bad on me once and it started popping. I would keep the gap .030-.035. The smallest gap you can use is the best. Keeps wear on the ignition parts down and prevents blowing the spark away at high rpm.
I'm changing plugs and going over the ignition this weekend.
Quote:
Originally Posted by Monk View Post
Quote:
Originally Posted by JBoggs View Post
I'll let you know how long the DBR's last, with the sidewall and the wear indicators, I'm thinking it won't be a long life tire.



Far as fuel system, no, it's exactly the same as the previous years. Ignition and some wiring do have some updates. I went to a Moroso Crank Trigger. Believe it's gaped at .060 (I'll re-verify). I did re-phase the rotor too. Checked timing 3 or so different occasions. Also the plugs have a lot of runs on them. I could drop a new set in? Do you think it would be more likely ignition?

Looking forward to your DBR results.



The breaking up sound like ignition to me. Do you have an old HEI to try? You could even prove it out on the street with a couple spirited runs.
I don't have an old HEI unfortunately. I have Futura 29" street tires mounted on some other wheels and was out a couple weeks ago. You can't go near the throttle without it getting stupid and I do not want to run the DBR's on the street. I'll test it at the track. Much safer area to do so.

72 Slovelle
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post #35 of 37 (permalink) Old Jul 2nd, 20, 8:55 AM
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Re: Radial Testing Tires Moving and

Quote:
Originally Posted by bracketchev1221 View Post
I would try new plugs first. I did have one go bad on me once and it started popping. I would keep the gap .030-.035. The smallest gap you can use is the best. Keeps wear on the ignition parts down and prevents blowing the spark away at high rpm.
Agree. Any time you have a slight miss, always do plugs first.

As another reference point I have run lows 6’s in the 1/8th with a Mallory Comp 140 Pump. 2 - 1000 HP carbs.

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post #36 of 37 (permalink) Old Jul 2nd, 20, 4:42 PM
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Re: Radial Testing Tires Moving and

Is that Chevelle a P/G car. Looks pretty good going down the track. I just used a set of lightweight 30X9 radial slicks and Micky Thompson said DO NOT SCREW THEM DOWN, it will tear up the tire on the beads. I picked up a solid tenth and 1 mph with them.


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post #37 of 37 (permalink) Old Jul 2nd, 20, 6:02 PM Thread Starter
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Originally Posted by 68Chevele View Post
Is that Chevelle a P/G car. Looks pretty good going down the track. I just used a set of lightweight 30X9 radial slicks and Micky Thompson said DO NOT SCREW THEM DOWN, it will tear up the tire on the beads. I picked up a solid tenth and 1 mph with them.
Thanks, it's definitely not a show car up close 🙂. It has a 1.80/1.0 PG.

72 Slovelle
555 Pump Gas BBC
Best so far:
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