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Re: My bracket hemi build [Re: Triple Threat] #2115487
07/22/16 01:37 PM
07/22/16 01:37 PM
Joined: Jan 2003
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Smyrna, South Carolina
STEFF Offline
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Smyrna, South Carolina
Trans Brake set at 4500 or 5000 depending...5500 Converter Flash, Shift at 7300-7500. My engine is 401", 4.10 bore x 3.79 stroke. Motor peak HP is at 7000, Peak torque was 5200-5300 if I remember correctly.

Re: My bracket hemi build [Re: STEFF] #2115491
07/22/16 01:44 PM
07/22/16 01:44 PM
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Renton Washington
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Triple Threat Offline OP
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Interesting, 9 more cubes, but 1/4" less stroke.

Need to put mine on a chassis dyno at least to see where the peaks are.

Re: My bracket hemi build [Re: Triple Threat] #2115532
07/22/16 02:49 PM
07/22/16 02:49 PM
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Smyrna, South Carolina
STEFF Offline
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Originally Posted By Triple Threat
Interesting, 9 more cubes, but 1/4" less stroke.

Need to put mine on a chassis dyno at least to see where the peaks are.


How big is your motor?

Re: My bracket hemi build [Re: Triple Threat] #2115587
07/22/16 03:45 PM
07/22/16 03:45 PM
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Renton Washington
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Triple Threat Offline OP
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392" 3.927 x 4.050


-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
Re: My bracket hemi build [Re: Triple Threat] #2166992
10/03/16 01:03 PM
10/03/16 01:03 PM
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Renton Washington
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Triple Threat Offline OP
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Cliff Notes: 515 HP to the Tire

Took the old girl to the dyno on Saturday, tried a few small things with jetting and timing, wasn't able to find any real power but it was interesting none the less.

The dyno doesn't like the converter, it flashes to 6300 and was causing the graph to have a giant hole in it, thus why the graph has MPH on it instead.

The engine never stopped pulling, on each run, peak horsepower occurred where I lifted. I pulled it to 7500 and it was still gaining. I don't ever plan to spin it beyond that so I didn't bother to rev it up more. In hindsight I probably should have tried 7800 just to see what happened and verified the valve train stability. I may do that in the spring if I make some changes this winter.



Hopefully I will be taking the car out in the next few weeks with a shorter tire on it to let the car rev more. With the 30" slick now it goes through the traps about 6900. I've got a 28" radial on it that should let it sing a bit more. The switch to a radial alone should be worth about a tenth, plus whatever is gained by 2 inches less height.

Last edited by Triple Threat; 10/03/16 01:13 PM.

-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
Re: My bracket hemi build [Re: Triple Threat] #2167026
10/03/16 01:47 PM
10/03/16 01:47 PM
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Nebraska
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Nebraska
Was that altitude corrected?


Mopar to the bone!!!
Re: My bracket hemi build [Re: Triple Threat] #2167046
10/03/16 02:24 PM
10/03/16 02:24 PM
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Renton Washington
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It was correcting after the pull so i'll say yes.

Upper right corner on the sheet it says CF: SAE.

The first pull it made 520 and then corrected down to 513 for whatever that's worth.


-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
Re: My bracket hemi build [Re: Triple Threat] #2167123
10/03/16 04:12 PM
10/03/16 04:12 PM
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Nebraska
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I know your up there a ways, those are stout numbers with a loose vert.


Mopar to the bone!!!
Re: My bracket hemi build [Re: Triple Threat] #2181352
10/24/16 12:43 PM
10/24/16 12:43 PM
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Renton Washington
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Triple Threat Offline OP
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New best this weekend. There were issues with water seeping up near the 1/4 mile so we only got to run 1/8th. The track also hadn't been raced on in 2 months so it was pretty green and lots of guys including me spinning the tires. I made 4 runs total, only 2 of them were good.

Incrementals
OLD NEW
1.438 1.438
4.190 4.128
6.516 6.422 .09 better
104.96 106.27 1.3 MPH better
10.264 ?
130.94 ?

I estimate the car was going to run 10.10-10.12 ish at 132. Ricer math as I like to call it with just a bit of tire spin. The car went 1.41 the pass before this and 6.426 and should be capable of 1.3X using the transbrake. These runs were both footbraking.

Now the winter upgrades and diet program can begin.


-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
Re: My bracket hemi build [Re: Triple Threat] #2181503
10/24/16 03:39 PM
10/24/16 03:39 PM
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Nebraska
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It is running right where it should be imo. But quicker is always nice!


Mopar to the bone!!!
Re: My bracket hemi build [Re: Triple Threat] #2181512
10/24/16 03:50 PM
10/24/16 03:50 PM
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Renton Washington
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Triple Threat Offline OP
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I only get to chase ET a few times a year since i'm usually bracket racing. Fun to chip away at it and see results.


-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
Re: My bracket hemi build [Re: Triple Threat] #2181554
10/24/16 04:55 PM
10/24/16 04:55 PM
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Canada
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Canada
What upgrades do you have in mind for over the winter?


69 Dart
Re: My bracket hemi build [Re: Triple Threat] #2181639
10/24/16 07:09 PM
10/24/16 07:09 PM
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Renton Washington
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Triple Threat Offline OP
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Nothing Engine wise, maybe port the intake.

Mostly chassis work, rear discs and lightening the car a hundred pounds or more. The engine works well, need to make things around it more efficient.


-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
Re: My bracket hemi build [Re: Triple Threat] #2181831
10/24/16 11:06 PM
10/24/16 11:06 PM
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Posts: 1,454
Glendora Ca.
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Glendora Ca.
This is good to hear Dustin, glad to see the car is still happy



"Just a Bracket car dressed up like a streetcar"
Re: My bracket hemi build [Re: Just-a-dart] #2182083
10/25/16 12:28 PM
10/25/16 12:28 PM
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Renton Washington
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Originally Posted By Just-a-dart
This is good to hear Dustin, glad to see the car is still happy


It is, now hurry up and finish yours!


-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
Re: My bracket hemi build [Re: Triple Threat] #2184575
10/28/16 03:17 PM
10/28/16 03:17 PM
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Between a rock & a hard place
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Between a rock & a hard place
Originally Posted By Triple Threat
Should fire up in the next couple days. Might visit the track this weekend if all goes smoothly.


Are those stock replacement coils?

Dustin_G3_hemi.jpg
Last edited by cudadoug; 10/28/16 03:20 PM.
Re: My bracket hemi build [Re: Triple Threat] #2184592
10/28/16 03:25 PM
10/28/16 03:25 PM
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Renton Washington
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Factory coils from the junkyard.

I paid $30 for the coils, 1 valve cover and the front cover. The second valve cover was damaged.


-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
Re: My bracket hemi build [Re: Triple Threat] #2184750
10/28/16 06:23 PM
10/28/16 06:23 PM
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Between a rock & a hard place
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Between a rock & a hard place
Originally Posted By Triple Threat
Factory coils from the junkyard.

I paid $30 for the coils, 1 valve cover and the front cover. The second valve cover was damaged.


LOL...excellent!

Re: My bracket hemi build [Re: Triple Threat] #2332124
07/05/17 07:54 PM
07/05/17 07:54 PM
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Renton Washington
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Original goal from first post "Run 10.0's at 3350"

Car went 10.03@134 this past weekend at 3380 LBS, on bias plys, through the mufflers. 29.50 baro, 83% humidity, it was around 1000' DA if I remember correctly.

Made 18 runs on Sunday, all between 10.03-10.11.

I'll wait for the cooler fall air to come around then switch to lighter oil, radials and maybe ditch some extra weight and see how far I can go before tech officials catch onto the lack of roll cage. In previous testing the oil was worth close to a tenth and so were the radials.

Pretty pleased with the Hemi, it's won enough money to pay for itself.


-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
Re: My bracket hemi build [Re: Triple Threat] #2332127
07/05/17 08:04 PM
07/05/17 08:04 PM
Joined: Jun 2003
Posts: 9,225
Charleston
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Charleston
That is awesome


Gen 3 power 6.22@110, 9.85@135
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performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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