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  1. R

    Magnum in 70 Dart, can't keep it cool.

    The air in your block could still be a problem. You have to make sure that the hose going to the top of the radiator will not hold air pockets. I use the same type of hose ad it worked great once it was going up hill the whole way to the radiator. I also put three small industrial 12V fans over...
  2. R

    904 torque converter questions

    Did you lock-tite the bolts? I miss that before. They only back out so far and make a lot of noise. So probably not that. Maybe starting with a new flex plate. Just a cheap place to start if you have the trans out. They don't cost much and if you think about what they do and the strain that is...
  3. R

    360/904 Torque converter

    Call Turbo-Action. They know their business. Very helpful and will not sell you something you don't need.
  4. R

    Exhaust Backfiring

    Yes plugs and the four corner idle not setup right had me making adjustments to the carb that would make it run but not well. Thank you. I also did go over all the exhaust points and re-seal them. It got rid of some small leaks that didn't make much noise. The exhaust on this Barracuda hangs...
  5. R

    Exhaust Backfiring

    It was the spark plugs. They didn't look bad but were trashed and I did it by gapping them. They were titanium. I knew tgey came pre gaped but didn't know that changing them ruined them. I gapped them at least three times.
  6. R

    Exhaust Backfiring

    Here is what fixed it for me. Changed my spark plug's back to copper NKG's. Gaped st .40" . Have Silver ones on back order. Had NKG G-Powet Platinum 7090's in. I made the mistake of gaping them. If you buy the don't touch the just put them in and hope for the best. Found YouTube videos as why...
  7. R

    Exhaust Backfiring

    Turned out to have been the spark plugs were trashed. Went back to copper NKG's and 95% of the popping Wass gone. I found more will post it all at the end of this thread.
  8. R

    Sad video too see..Closed Dragstrip

    You are right. I had a house in a naobghhood tgat rapped around a huge farm and people moved in and bitched about the combines harvesting at night. But the farm was owned by the Gilmore family. Lots and lots of money. Jim Gilmore sponsored AJ Foit Indy car that won back in the early 70's. But...
  9. R

    Exhaust Backfiring

    I did tighten up the advance. Would have to look at my notes. But the bushing in the distributor that should have been 21° was 24°. Changed to a black bushing that should have been 18 but is 20° that but left the springs that have been in it the car for 15 years. It ran great for a time. Don't...
  10. R

    Sad video too see..Closed Dragstrip

    Wow Cincinnati should be able to support at track. Too bad.
  11. R

    Sad video too see..Closed Dragstrip

    Was too noisy? It is just big money doing a land grab. They are doing it here in Michigan too. All Republicans on the local board support it. It is out in the country so they have the majority and are calling it progresses. Look for the money trail.
  12. R

    Sad video too see..Closed Dragstrip

    The real problem is just like live music, the public just doesn't give a **** to come and spend a day or evening watching. Then you have wealthy people that don't like the Noise or want the land. They then push local governments to close them. This happens time and time again. Good but sad video.
  13. R

    New member from Illinois - 1971 Plymouth Duster

    Have had my 904 for over thirty years. Get your rebuild kit from A&A trans just south of Indy. 317-831-3066. Get the sprag kit and a few other of there custom mad parts and you can have a lighter, smaller trans that will take anything that 360 will hand out as long as you keep the oil cool. Have...
  14. R

    Exhaust Backfiring

    Here is my cam sheet. Like the way the car was running the first 5000 miles this year. It was sweet on the Dragon's Tail. Just put it in second and drove through all 310 corners up the mountain. Need to get it back to that setup.
  15. R

    Exhaust Backfiring

    Thank you lots of good info. Today I put the jetting in the 650 Demon just one jet smaller than stock. Idle fuel restriction from a .031 to a .029... still looking.. so went from a .069 idle air to a .073. didn't run well. So said what the hell put in .055s. not good. Then .069s. better. But...
  16. R

    Exhaust Backfiring

    here is the car.
  17. R

    Exhaust Backfiring

    Backfires out the exhaust when cruising in drive and then pushing hard on the gas. Or a dead stop and a little after you get going can't tell you what rpm. It moves too fast. Have a 2800 stall converter in it so it flashes up quickly. 904 trans with the low first gear and $2000 worth of A-1...
  18. R

    Exhaust Backfiring

    Started with the filter change and crap on the needle and seat. Cleaned it twice. Before I switched carbs. Going to switch back to to the Edelbrock carb. I tore it completely apart and cleaned every part inside and out. But want to make the Demon work. Should put the Edelbrock 750 back on to...
  19. R

    Exhaust Backfiring

    Thanks for the thought. Have an Edelbrock electronic fuel pump with new 3/8 branded black line with AN fitting from the back of the car to the front of the car. Have it regulated to 6 psi. Then the line to the car with the filter in it. A plastic filter is a good idea. The intake is a Edelbrock...
  20. R

    Exhaust Backfiring

    Plug wires are good no sign of tracking in the cap. It might be time for a new cap and rotor. They are a couple of years old. Want to replace my AL6 with a new AL6-2 eventually. Put a set of Doug's headers on this spring and the pipes are nicely out of the way of all plug wires. Plus I rap...
  21. R

    Exhaust Backfiring

    I also rapped the fuel line and filter to keep heat away. Just doing lots of little things you wold find on a race car. I don't care much, how it looks under the hood, just want to get everything out of what is there. But all this would make it richer. I quess.
  22. R

    Exhaust Backfiring

    Didn't think about that. The cooler the fuel the more dens the richer the charge. Where the filter was before was right over the Vale cover. I also made a heat shield for under the carb. With my spacer and the shield the fuel bowls are now 20° cooler than my intake. That will make things...
  23. R

    Exhaust Backfiring

    Going to put in a set of .071 restrictions in the top of the carb. In the morning. That is the largest I have. That should let a little more air into the idle circuit and lean it out a little. The other option is change the .031 restriction on the metering blocks to .029.. That is the smallest I...
  24. R

    Exhaust Backfiring

    It was after moving the filter. I did find a flake of something on the passenger side needle. Cleaned it. Checked the float levels. Put it back on the car. Drove it 70 miles to Detroit ran OK. Then it started doing the same things. ??? So I took the Edelbrock off and put the Demon on. It always...
  25. R

    Exhaust Backfiring

    Like at cruse at 35-45 then hit the gas hard. Not flooring it just hard. Or from a dead stop and hitting it hard. It will. Want to get this stopped before I floor it.
  26. R

    curious cam sprocket wear- 340

    Hughes engines make a nice retainer that works with a fuel esoteric or not. Not a lot of money. Just a thought when you put it back together.
  27. R

    Exhaust Backfiring

    Thanks. Plug Gap is set to. 40 down from 45. That was a suggestion from the guy that looked at my plugs on the Power Tour. Been trying to get the A/F down. Guess that is my question. A/F at idle is 12.5 to 13. About the same as driving at 2000-2700 cruise. Guy at Holly told me that A/F are only...
  28. R

    Exhaust Backfiring

    Have QF red Metering blocks on the 650 Demon. Stock Demon calls for 70/78 jets. I drilled and tapped the idle air restrictions. Stock # calls for a .070. have .069 in them. QF blocks have .031idle jets. Have a Edelbrock A/F gage and it reads 13-12.5. not bad but on the rich side. Runs good but...
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