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Old 06-30-2008, 11:55 AM   #1 (permalink)
Freddie's Regal
Deltona: Peace At Last...
 
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Thumbs up Detonation mystery licked...

It was all the timing chain and cam. Back in the day when I new very little about these cars I installed all Kenne Bell internals in the engine.

Going over my reading materials that came with the cam and chain I understand that the cam was a 4-degree advance grind. Adding to this the double roller timing chain and sprockets had three keys to choose. 0-degrees, 4-degrees advance, 4-degrees retard.

The instructions were confusing. Kenne Bell suggested that if one has one of their cams, (which I did), they'd suggest using 0-degrees or 4-degrees advance. I played it safe and used the 0-degrees as per instructions.

Bad choice! The instructions mentioned vaguely that choosing 0-degrees was actually another 4-degree advance allowing for chain stretch. Combining this with the cam grind I'm actually running 8-degrees more advance than OEM.

Realizing this error I removed the chain and reset it to 4-degrees retard.

Bam!! No more detonation. I set the timing to 15-degrees and I have a slight but barely audible knock only under a heavy punishable load, (pretty much like new cars when one slams on the accelerator). This is tolerable and normal.
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Last edited by Freddie's Regal : 06-30-2008 at 09:17 PM.
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Old 06-30-2008, 03:10 PM   #2 (permalink)
Ttype83
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Glad to see that you got it licked
Now get going on the alky kit and have some fun
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Old 06-30-2008, 09:15 PM   #3 (permalink)
Freddie's Regal
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Talking

Quote:
Originally Posted by Ttype83 View Post
.....
Now get going on the alky kit and have some fun
I already started modifying a spare Q-jet I have. I bored out a water port to the left boost venturi. A spare pull-over enrichment tube from a duel jet will fit perfectly, the one I made I cut too short.

I'll see if Eric has a beat duel-jet hanging around so I can nab the internal P/O tube. It has the perfect orifice size of .020. This P/O brass tube has a length of 2.50 inches. Coupled at the booster venturi this should cause a perfect vaporization with a consistent flow rate.

This should work. The worst that could happen is no effect.
But I'm highly certain that this will work. I'll post pics of the mod only if I'm successful.

I do need another tank similar to a radiator overflow container. A trip to the local bone-yard should yield me something. I need at least a 1-2 gallon capacity.
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Old 07-01-2008, 12:12 PM   #4 (permalink)
turbofish38
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Quote:
Originally Posted by Freddie's Regal View Post

I'll see if Eric has a beat duel-jet hanging around
Come on over and get it.It might as well go to somebody who can use it. I couldn't even get $10 for it on eBay.
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I brought Top Fuel racing to Isreal. And coined the phrase "Burning Down The Menorah".

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Old 07-01-2008, 09:51 PM   #5 (permalink)
tony moore
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glad to see you got it worked out freddie.
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86 grand national 2nd owner t tops, digital dash and few other options. bone stock no mods(yet!!) brought back from the dead. new paint and interior 85 regal t type clone, blue in and out , carb. turbo stock engine , no ecm, msd btm,holley blue fuel pump, 650 holley double pump carb. 3.73 gear with mini spool,all the gauges, stock trans and conv. slow but fun!!
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Old 07-03-2008, 01:03 PM   #6 (permalink)
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Cool. Can't wait to hear your results after alky. Still kickin rocks waiting to track down another carb turbo. Found a lead on 2 but one is a parts car as far as I'm concerned and the other no longer is turbo but is in good shape has floor shifter and most of the underhood turbo stuff. Supposed to find out about that one next week. Rather go carb'ed turbo that Dodge'd turbo
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