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Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting etc: [Re: Big-Mike] #113884
09/02/08 11:59 PM
09/02/08 11:59 PM
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70sixpkrt Offline
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I am running 4.5 power valve, 65 jets in center, and 78s on the passenger side on outboards with 83s on drivers side. I am also using Promax metering plate for the center and the jettable plates for the outboards.

4660194-100_1633.JPG (46 downloads)

[img]http://www.imgur.com/hxlGUJt.gif[/img]
4-speed
3:54 Dana
13.01 @107.93 with street tires (not hooking up)
Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting etc: [Re: 70sixpkrt] #113885
09/03/08 12:39 AM
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Big-Mike Offline OP
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Thanks for that.
I guess, since staggered jetting seems to be the norm; there must be a fuel distribution problem in manifold.

Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting etc: [Re: Big-Mike] #113886
09/03/08 11:17 AM
09/03/08 11:17 AM
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I'll have to check my 4 corner jet notes:
Don't remember a stagger.
dyno'ed 650lb-ft around 3800
tops about 5400

H beam
forged Ross
Edel heads
1.75 header-> 3" X
.5" lift custom cam
700+ rpm idle
493->11" centerforce->Hemi 4 spd->742 8.75 3.55
(Plans on a 3.54 Dana)

If you want info let me know, I'd have to get it.

Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting etc: [Re: limelight440] #113887
09/03/08 12:35 PM
09/03/08 12:35 PM
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Quote:


dyno'ed 650lb-ft around 3800
tops about 5400





Those are some impressive numbers! Where did the horsepower come in at?


1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting etc: [Re: limelight440] #113888
09/03/08 04:55 PM
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Big-Mike Offline OP
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Limelight440. Michael, please give me what you can in settings. Even the cam specs,if your open to sharing as i don't mind buying another cam for improvement.
650ft lbs is mighty fine bum shifting grunt.
I would really love to get this Six-Pac going, so all info would be gladly appreciated!
Regards, Mike.

Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting etc: [Re: Big-Mike] #113889
09/03/08 08:49 PM
09/03/08 08:49 PM
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If you're interested in power a little lower in the rpm range (681hp@5500RPM & 685TQ @ 4500rpm), I'd be happy to share my cam specs with you. Use even a bigger cam the numbers would only go up from there, but at the expense of some low end...


1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting etc: [Re: jbc426] #113890
09/03/08 11:41 PM
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Big-Mike Offline OP
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Michael; I have emailed your Yahoo account. Thanks for the generosity.

Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting etc: [Re: Big-Mike] #113891
09/04/08 06:51 AM
09/04/08 06:51 AM
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I will have to get my notes, I will post tonite.

I must correct my self minorly, as I looked at
my dyno numbers again:

643lb-ft was @ 4000
548hp was @ 5100 but only hicups 10hp to 5550

This is an excel chart that I made from
the dyno print out numbers. Unfortunately the full run
was lost but I do have the print out from the out-boards opening (2800ish) on.

4662852-493.pdf (142 downloads)
Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting et [Re: limelight440] #113892
09/04/08 07:12 AM
09/04/08 07:12 AM

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post the jetting if you get a chance.

Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting etc: [Re: limelight440] #113893
09/04/08 04:56 PM
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Big-Mike Offline OP
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Michael; this is so good of You! Thank You so much. I don't know if you received my personal email; i was asking for your cam specs if you have them available. Also; what state are your heads; Std: or some,to major port/bowl work.
My email is big-mike@xtra.co.nz if you wish to keep specs quite.
Also, anyone who wishes to write direct, this is fine by me. Welcome the chat.
Regards, Mike.

Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting etc: [Re: Big-Mike] #113894
09/04/08 07:53 PM
09/04/08 07:53 PM
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2x 62 & 4x 93

Edelbrocks are standars 84cc (no dress work)
compression I'm told ended up 10.3:1
although I thought it would have been a little higher. I keep meaning to do a hot crank over.

Cam is from Cam Techniques of Sarasota Florida 941 727 5552
int & exh lift are .504 at valve
304deg (240@ .050")
104deg intake centerline installed 4 deg advanced
I can give the Cam Techniques Grind Number to order if you want it.

Mike:
I dont' know what my email is listed as, but rest assure
you can find me at chesna.mi@neu.edu

Mike

Last edited by limelight440; 09/04/08 07:59 PM.
Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting etc: [Re: limelight440] #113895
09/04/08 08:57 PM
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Big-Mike Offline OP
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Mike.
Have sent email with car pics.
Hope you receive. Thanks for massive help.

Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting et [Re: Big-Mike] #113896
09/04/08 10:42 PM
09/04/08 10:42 PM

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4 93's are stout....

Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting et #113897
09/04/08 11:30 PM
09/04/08 11:30 PM
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superwrench Offline
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Quote:

4 93's are stout....




WOW!!! You ain't kiddin!!!

I thought my # 86's were a tad on the heavy side.
Maybe he means .093"....or about a 82 jet.

That's a LOT of fuel!!!

Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting et [Re: superwrench] #113898
09/04/08 11:35 PM
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70sixpkrt Offline
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Quote:

65 jets in center, and 78s on the passenger side on outboards with 83s on drivers side




Not to hijack thread but I just pulled my plugs and I am running rich. What do you guys recommend for a 446" with aluminum manifold and Eddy heads?

Last edited by 70sixpkRT; 09/04/08 11:36 PM.

[img]http://www.imgur.com/hxlGUJt.gif[/img]
4-speed
3:54 Dana
13.01 @107.93 with street tires (not hooking up)
Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting et [Re: 70sixpkrt] #113899
09/04/08 11:45 PM
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Hi there guys!
No! Your not high-jacking; everyone's comments are welcome.
I suspect SuperWrench is about right. I remember Steve Dulcich doing the manifold test & with the Six-Pac found #84's wre doing the bussiness.
Whats screwing me up is, I jetted with these numbers & #63 centre carb & have the 2ndries opening early, but not bogging, & then i took this set-up off & put the 650-D/P with Weiand Xcelerator on & instantly had more pull & more revs as well.

Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting et [Re: Big-Mike] #113900
09/04/08 11:50 PM
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Quote:

then i took this set-up off & put the 650-D/P with Weiand Xcelerator on & instantly had more pull & more revs as well




I was told that the sixpack manifolds are really restrictive.


[img]http://www.imgur.com/hxlGUJt.gif[/img]
4-speed
3:54 Dana
13.01 @107.93 with street tires (not hooking up)
Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting et [Re: Big-Mike] #113901
09/04/08 11:51 PM
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Big-Mike Offline OP
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Hey, Super Gas; I would try #78's on both sides.
I'm gunna borrow a friends "Inovator Gas Analizer" & do some hard acceleration & just see exactly where the mixture is.
Probably a week before i get the time though.
Will post my findings when i do this.

Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting et [Re: Big-Mike] #113902
09/04/08 11:52 PM
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That is exactly what i thought when i changed manifolds.

Re: Six-Pac Stroker. Info for Set-Up Needed. Jetting et [Re: 70sixpkrt] #113903
09/05/08 03:38 PM
09/05/08 03:38 PM
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Quote:

I was told that the sixpack manifolds are really restrictive.




It's simply not true. There is room for considerable improvement, and I had mine improved at Hughes Engines getting nearly 700 hp out of my 493" motor with a hydraulic cam!! Thanks to their deep porting work, I have great lowend and some considerable topend performance out of my sixpack. I understand they've gotten even better with them since then!!!

(This from Hughes Engine's Website:

Stock average 302.2 CFM

Stock scatter 272-331 CFM 59 CFM spread

Modified average 332.6 CFM

Modified scatter 306-366 CFM 60 CFM spread

STAGE 2
Average 346 CFM (44CFM more than stock)
Scatter 315-374 CFM (59CFM spread)

Notes: We work on a lot of Big Block 6-pack intakes. They are probably one of our more popular ones to modify. The #1 and #4 ports are hard to improve much and without them in the mix, the modified average goes from 332.6 CFM to 342.5 CFM and the modified scatter goes from 326 CFM to 366 CFM. These are serious numbers for big block intake manifolds, especially ones that can pass for “stock”. Expect this manifold to get more flow improvement as time passes. We have dynoed a hydraulic cammed 493 cu in with stage 1 version at nearly 700HP."

Yes, there are better manifolds for more top end, but I don't think the sixpack manifolds can be considered restrictive.


1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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