Finally 8.0’s

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OldmanRick said:
Just for the sake of discussion, i think the cam installed was probably a mild off the shelf grind. Most of those had a slight increase in lift/duration, low5's/210-216 range, but maintained a 114ish lsa to be computer friendly. Makes for good vacuum, smoother idle and a flat power curve. Nice for the street, but leaves a little on the table for the strip.
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That sounds like the cam that possibly could be in the car. The owner built the car for his wife to bracket race, while he raced a I/SA Road Runner, he put together both cars. He has 6 Wally‘s for NHRA stock eliminator. So he has knowledge on building a race car. Interesting story.

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you see the Road Runner on the bottom picture. Original add for the car.

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PG Duster said:
That sounds like the cam that possibly could be in the car. The owner built the car for his wife to bracket race, while he raced a I/SA Road Runner, he put together both cars. He has 6 Wally‘s for NHRA stock eliminator. So he has knowledge on building a race car. Interesting story.

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you see the Road Runner on the bottom picture. Original add for the car.

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Car has good stance. Nice car! Did the previous owner ever race it? Did he say what it ran for him?
 
318willrun said:
Did they say what it ran for them ?
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Yep, both of them said mid 13’s with a stock converter. I put a 3600 stall converter and replaced the 904 with a 727 trans and replaced the msd box, curved the distributor, and put a new carb on it and it went a full second quicker.
 
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If you still have the 904 I would put it back in especially if it has the low gear set. 2.76 1st gear and less rotating mass puts more power to the tire. You could also borrow a set of 26" tires 235/60/15 or 275/50/15 drag radials and the car will pick up another 1/10 in the 1/4 mile.
 
mderoy340 said:
If you still have the 904 I would put it back in especially if it has the low gear set. 2.76 1st gear and less rotating mass puts more power to the tire. You could also borrow a set of 26" tires 235/60/15 or 275/50/15 drag radials and the car will pick up another 1/10 in the 1/4 mile.
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Although the 904 was fresh rebuild, the internals broke. So I worked a deal with the trans shop to trade for a 727. I never had problems with a 727 in my 68 Road Runner, 71 340 Duster, a 69 GTS Dart wit a 383 in it. I know the 904 would be faster, I want reliability also. Changing the Tire size sounds like a great idea. And as always thank you guys for the help, that’s why I like FABO website. All suggestions from this wealth of knowledge is appreciated.
 
PG Duster said:
Although the 904 was fresh rebuild, the internals broke. So I worked a deal with the trans shop to trade for a 727. I never had problems with a 727 in my 68 Road Runner, 71 340 Duster, a 69 GTS Dart wit a 383 in it. I know the 904 would be faster, I want reliability also. Changing the Tire size sounds like a great idea. And as always thank you guys for the help, that’s why I like FABO website. All suggestions from this wealth of knowledge is appreciated.
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What converter was in front of the 904? Do you still have it?
 
318willrun said:
What converter was in front of the 904? Do you still have it?
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it was a stock 6 cylinder converter, he believed that a stock 6 converter will stall higher than a stock 8 cylinder converter. I remember back in the day people used a Vega converter in Chevys turbo 350 and 400 for a higher stall, but they did not last long before coming apart.
 
mderoy340 said:
If you still have the 904 I would put it back in especially if it has the low gear set. 2.76 1st gear and less rotating mass puts more power to the tire. You could also borrow a set of 26" tires 235/60/15 or 275/50/15 drag radials and the car will pick up another 1/10 in the 1/4 mile.
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mderoy340 said:
If you still have the 904 I would put it back in especially if it has the low gear set. 2.76 1st gear and less rotating mass puts more power to the tire. You could also borrow a set of 26" tires 235/60/15 or 275/50/15 drag radials and the car will pick up another 1/10 in the 1/4 mile.
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Please keep us updated on your nitrous adventure. I wont be of much help as i bought one of the early Marvin Miller kits and it collected dust for years because i couldn't bring myself to use it...lol.

Only advice i can give is, if you chose throttle activation vs a button, be prepared for the 1-2 shift to come up really fast. :)
 
I will, I’m almost finished with the plumbing, now I can work on the electrical. And then to the track.

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You are right about the 1-2 shift comes up quickly. I had a 71 Z/28 Camaro that had nitrous on it and soon as I hit the button it was time to shift.

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I sold it to get this Duster, I miss it, but glad to be back with Mopar.
 
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Hey you guys I’m about 90% complete with the installation of Nitrous.

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I just have to make under the dash neat and finish hooking up the bottle heater. And then it’s time to have fun.
 
OldmanRick said:
Just for the sake of discussion, i think the cam installed was probably a mild off the shelf grind. Most of those had a slight increase in lift/duration, low5's/210-216 range, but maintained a 114ish lsa to be computer friendly. Makes for good vacuum, smoother idle and a flat power curve. Nice for the street, but leaves a little on the table for the strip.
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It very well may be that mild of a camp shaft, I do remember that comp cams had a mild street cam shaft that was about those numbers. Do you remember what the lift was on those?
 
OldmanRick said:
These are the type i was thinking of. Looks like .480 to .512 range...

DODGE 5.9L/360 Mopar small block Magnum COMP Cams Camshafts - 112 Lobe Separation (degrees) - 114 Lobe Separation (degrees) - Free Shipping on Orders Over $99 at Summit Racing

If indeed you do have a cam profile like these, your car runs very strong. :thumbsup:
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It’s probably close to the second cam listed, I get the best et and mph when I shift it at 5500. And the idle is mild, And that would be characteristic with a 114 degrees Lobe Center.

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OldmanRick said:
Kudos to 331MP. Love to see members offering help, parts for others. That's what makes this site 2nd to none in the car world.

I in the box never used and he wants about $300 for it, maybe a little less. I talked to C J carburetors in Southern California who does a lot of super stock and stock eliminator carbs and he said Damon carburetors have their own demons and he prefers a Holley. Does anybody have experience Demon carbs?

While i would prefer a DP in your situation, i'm guessing that if your HP is running well, you may just be tinkering around the margins with a DP carb for now. Meaning i'm not sure the cost/benefit of a new one is warranted.
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I Have a friend that has a in the box never used 750 demon double pumper carb. and he wants about $300 for it, maybe a little less. I talked to C J carburetors in Southern California about 5 years ago who does a lot of super stock and stock eliminator carbs and he said Damon carburetors have their own demons and he prefers a Holley. Does anybody have any experience with Demon carbs? I’ve never used one before.
 
My nitrous installation is complete, waiting for a cool day to make some drag strip hits. At Irwindale it’s been about 100° To 104 for the last three weeks. I will let you guys know how it runs when I get to the track.

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Nevermind, I looked at your carb wrong.
Base plate and a different fuel bowl. Makes it a doub pump
 
Hay, guys I’m going to the track this Thursday, to try out the nitrous. I made one test hit on the street, it put a smile on my face. I will let you know how it runs. Are you in Cali
33IMP
 
PG Duster said:
Hay, guys I’m going to the track this Thursday, to try out the nitrous. I made one test hit on the street, it put a smile on my face. I will let you know how it runs. Are you in Cali
33IMP
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Unfortunately, no. Girlfriend still recovering from shattered knee, needs me here yet.
Good luck, and great results! Have fun.
 
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