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Re: The 541 is headed to the dyno! Any guesses? [Re: fast68plymouth] #3061685
07/22/22 06:47 PM
07/22/22 06:47 PM
Joined: Jan 2003
Posts: 30,063
Oregon
A
AndyF Offline
I Win
AndyF  Offline
I Win
A

Joined: Jan 2003
Posts: 30,063
Oregon
My notes say that I used Comp 7228-16 but I honestly don't remember. This wasn't a magazine build so I didn't keep really good records. The picture I posted seems to confirm that they are indeed conical springs so I'm going to assume that my notes are correct on the part number.

Re: The 541 is headed to the dyno! Any guesses? [Re: AndyF] #3061750
07/23/22 12:12 AM
07/23/22 12:12 AM
Joined: Jan 2003
Posts: 9,564
Frostbitefalls MN (Rocky&Bullw...
gregsdart Offline
master
gregsdart  Offline
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Posts: 9,564
Frostbitefalls MN (Rocky&Bullw...
Two questions, is there a beehive spring that fits your cam? And what can be done with the tunnelram? Many years ago i had a 535 with 906 heads, picked up .15 et in the 1/4 by hogging out that tunnel ram on it. Those two together might make a big difference. If you have a converter built to 340/hemi specs, it will flash over 3,000 rpm , (3400?) a nd that allows a little leeway in manifold tuning, i would think.

Last edited by gregsdart; 07/23/22 12:15 AM.

8.77 153 mph best, 3055 lbs 528 indy 440-1 alky
Re: The 541 is headed to the dyno! Any guesses? [Re: gregsdart] #3062453
07/25/22 02:40 PM
07/25/22 02:40 PM
Joined: Jan 2003
Posts: 3,449
Shelby Twp. Mi
HardcoreB Offline
master
HardcoreB  Offline
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Posts: 3,449
Shelby Twp. Mi
Congrats getting it going!

Re: The 541 is headed to the dyno! Any guesses? [Re: HardcoreB] #3064265
08/01/22 10:34 AM
08/01/22 10:34 AM
Joined: Jan 2003
Posts: 14,071
So. Burlington, Vt.
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fast68plymouth Offline
I Live Here
fast68plymouth  Offline
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Joined: Jan 2003
Posts: 14,071
So. Burlington, Vt.
There was a BBM on the dyno here last week.
Not a build we contributed to...... just provided the dyno service.

TF heads with their HR springs(PAC 1294), TF HR cam, Howard’s HR lifters(not sure which version), HS 1.5 rockers.

Tthe report I got is things were solid thru 5800rpm, and at 5900 the lifters gave up.

Those heads come set up with the spring installed height at a nominal 1.950”.
The specs for the PAC 1294 are 154@1.950/410@1.350.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: The 541 is headed to the dyno! Any guesses? [Re: fast68plymouth] #3064288
08/01/22 11:08 AM
08/01/22 11:08 AM
Joined: Jan 2003
Posts: 30,063
Oregon
A
AndyF Offline
I Win
AndyF  Offline
I Win
A

Joined: Jan 2003
Posts: 30,063
Oregon
5900 is a little low, I bet the owner was unhappy with that. The TF cam really needs to be pushed past 6000 rpm with a 440 to make peak power.

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