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Re: New 540 build
[Re: moparacer]
#3232764
05/14/24 01:07 PM
05/14/24 01:07 PM
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Joined: Jan 2003
Posts: 4,105
Shelby Twp. Mi
HardcoreB
master
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master
Joined: Jan 2003
Posts: 4,105
Shelby Twp. Mi
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Great power out of that build, especially when considering how many struggle with making 750+ with those heads. If you don't mind a couple of questions:
What compression?
What are the rough cam specs?
What were the flow #'s and what did you have to do to get those?
Thanks! Compression is 12.5 , camshaft is 275@.050 intake 279@.050 exhaust. 113 LSA intake is 109.5 centerline. A lot of thought went into the camshaft and particularly the intake closing point. The Victor head is way better than most give it credit for. Any of the 350cc cnc programs will get you right at 385cfm @.800 with the 2.2 valve. For my heads, I am 355cc, 2.2 valve and flow a TON. I stayed with the 2.2 valve on this set because the 2.25 on my first set didnt yield much. I thought it made the port a little too slow. I may post my flow sheets some time. I would like to get the car on the track and see what kind of power its making. Dynos and the track are 2 different animals.Valve train is atrocious on these heads. This is my second time using them. I recommend milling the rocker stands off and use longer valves. At the end of the day, thats the only way to get them right. Anything else is too compromised.. 355 cc?!?! Holy cow I had no idea..... I just keep slogging along with my old -1s and now guys are making Eddie's that are better lol. The jury is definitely still out on that yet because there has been 1000HP -1 motors.
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Re: New 540 build
[Re: Mbrown]
#3232777
05/14/24 02:24 PM
05/14/24 02:24 PM
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Joined: Dec 2021
Posts: 1,202
Loudoun County, VA
Brad_Haak
pro stock
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pro stock
Joined: Dec 2021
Posts: 1,202
Loudoun County, VA
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Perhaps I missed it... any info re the valve train being used (rockers, pushrods, lifter, etc.) other than it being a Mike Jones cam as spec'd above? I'm guess the rockers probably don't look like these 
2021 Challenger 6.4L Scat Pack 1320
100% stock: 1.680, 11.894 at 113.75 (DA 175 ft)
weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008]
pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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Re: New 540 build
[Re: Mbrown]
#3240053
06/23/24 11:32 AM
06/23/24 11:32 AM
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Joined: Oct 2018
Posts: 38
Indiana
Mbrown
OP
member
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OP
member
Joined: Oct 2018
Posts: 38
Indiana
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I finally got the 540 in the Duster. We should be able to get it to the track next week. It has been a very long hustle to get this together. I reworked his frame connectors. I moved the rear shocks to a more vertical position. The vacuum pump mandrel was too long to allow the radiator and fan set up we were using. I had to machine it down to the minimum, move the engine back a half inch, and cut the core support out to move the radiator forward. While fabbing a new core support I found numerous cracks in his inner fenders. I ended up stripping everything under the hood. I got everything welded up and painted. Once we got the engine in, I had to rewire everything under the hood. Lastly, I had to cut the six pack scoop off his hood and glass in a 6" cowl to clear the carb. We moved the battery to the trunk, but decided not to put a fuel cell in this season. He is gonna have to run his oem tank a little longer. We did take the bucket seats out and put in a pair of race seats, but it didn't net much weight savings. With the additional bracing and cage work the car is probably a little heavier than last season. I plan on getting on the scale soon. It will most likely be around 3480 with him in it and a full tank of gas.
Last edited by Mbrown; 06/23/24 11:32 AM.
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Re: New 540 build
[Re: Brad_Haak]
#3240057
06/23/24 11:46 AM
06/23/24 11:46 AM
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Joined: Oct 2018
Posts: 38
Indiana
Mbrown
OP
member
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OP
member
Joined: Oct 2018
Posts: 38
Indiana
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Perhaps I missed it... any info re the valve train being used (rockers, pushrods, lifter, etc.) other than it being a Mike Jones cam as spec'd above? I'm guess the rockers probably don't look like these I use a PAC spring, manley tool steel retainers, as far as rockers I did not use paired rockers. I used an off the shelf single shaft rocker with a custom made shaft and rocker stands. I set the geometry up so the rocker is perpendicular to the valve stem at 2/3 lift. Pushrods are 7/16 smith brothers. I will give more on the rockers and stands after /if they survive a season.
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Re: New 540 build
[Re: Mbrown]
#3240225
06/24/24 06:33 AM
06/24/24 06:33 AM
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Joined: Jan 2003
Posts: 4,105
Shelby Twp. Mi
HardcoreB
master
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master
Joined: Jan 2003
Posts: 4,105
Shelby Twp. Mi
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I finally got the 540 in the Duster. We should be able to get it to the track next week. It has been a very long hustle to get this together. I reworked his frame connectors. I moved the rear shocks to a more vertical position. The vacuum pump mandrel was too long to allow the radiator and fan set up we were using. I had to machine it down to the minimum, move the engine back a half inch, and cut the core support out to move the radiator forward. While fabbing a new core support I found numerous cracks in his inner fenders. I ended up stripping everything under the hood. I got everything welded up and painted. Once we got the engine in, I had to rewire everything under the hood. Lastly, I had to cut the six pack scoop off his hood and glass in a 6" cowl to clear the carb. We moved the battery to the trunk, but decided not to put a fuel cell in this season. He is gonna have to run his oem tank a little longer. We did take the bucket seats out and put in a pair of race seats, but it didn't net much weight savings. With the additional bracing and cage work the car is probably a little heavier than last season. I plan on getting on the scale soon. It will most likely be around 3480 with him in it and a full tank of gas. The things a guy won't do to get SOMEONE ELSE's car together. lol This car does not sound like it's going to be the optimal showcase for the motor YET. FWIW I've had decent luck with cowls on Duster's so that might not hurt any performance. Nice work and thanks for the updates!
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Re: New 540 build
[Re: Mbrown]
#3240320
06/24/24 02:33 PM
06/24/24 02:33 PM
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Joined: Jan 2003
Posts: 16,934
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,934
NC
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As far as the build it's pretty straight forward, although not easy. 4.375 bore x 4.5 stroke. Mahle pistons, molnar crank and rods. All machine work was done by BES. .
Can you share the bearing clearance numbers? and what bearings you used The parts for my "back-up" motor are Molnar (4.250" crank and 7.100" rods). With the Clevite bearings, it looks a touch tighter than I like. The mains were around 0.0023"- 0.0025" with Clevite MS1277HG So, I will change something before final machining and assembly.
Last edited by 440Jim; 06/24/24 03:35 PM. Reason: Added main bearing clearance
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Re: New 540 build
[Re: Mbrown]
#3240488
06/25/24 01:07 PM
06/25/24 01:07 PM
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Joined: Jan 2003
Posts: 16,934
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,934
NC
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I have .0028" on the rods, and .0029 on the mains. H series bearings on rods. CB 743HXN. The mains are M series. MS-972m. Thanks. For mine, using the HXN on both halves of the rods should do the trick. The half/half I mocked up was the left overs from my current motor with a Callies crank (a touch smaller rod journal). I will check into those main bearings.
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