Re: where do u shift your big block??
[Re: rtstreet]
#480720
09/27/09 12:41 AM
09/27/09 12:41 AM
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Joined: Jan 2003
Posts: 19,384 Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,384
Las Vegas
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8200:p Well that is where we shift the Cuda but it is a 525"er
FWIW my ole 451 in the Belvedere worked best at 6700. Steel rod SR head ran mid 10's at 3770lbs with a Scott Brown cam.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: where do u shift your big block??
[Re: goldmember]
#480722
09/27/09 12:51 AM
09/27/09 12:51 AM
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Joined: Aug 2005
Posts: 4,103 Yes
sixpakdodge
master
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master
Joined: Aug 2005
Posts: 4,103
Yes
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Re: where do u shift your big block??
[Re: moparmattkos]
#480724
09/27/09 01:54 AM
09/27/09 01:54 AM
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Joined: Nov 2004
Posts: 2,825 Sk. Canada
RemCharger
master
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master
Joined: Nov 2004
Posts: 2,825
Sk. Canada
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Quote:
I have a 451 stroker what kinda rpms do these like the most with a solid flat tappet cam? I am shifting at 6200 now and a few people say the 451 pulls the best it like 7200 any thoughts on this?
Either you got a real small cam, or you're sandbagging......
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Re: where do u shift your big block??
[Re: moparmattkos]
#480725
09/27/09 09:03 AM
09/27/09 09:03 AM
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Joined: Jan 2003
Posts: 16,932 NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,932
NC
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Quote:
I have a 451 stroker what kinda rpms do these like the most with a solid flat tappet cam?
The key part of that is solid flat tappet cam. Although with extreme setups it can rpm sky high, most valvetrain setups will need attention over 7000 rpm. And between 6500 and 7000 valve spring surge can be an issue unless you take some steps to avoid it. With a few tricks you can go 7500, but the spring pressures risk wearing/wiping a lobe, unless you use ceramic faced lifters (Schubeck style)
Ofcourse, your head flow, cam duration, etc. all play a role on what to shift your engine at.
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Re: where do u shift your big block??
[Re: moparmattkos]
#480729
09/27/09 12:52 PM
09/27/09 12:52 PM
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Joined: Aug 2003
Posts: 43,308 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,308
Bend,OR USA
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I have ran a lot of different BB combinations, the 451 is a 440 stock stroke crankshaft in a low deck, it is the same as a 440 with .060 overbore. I ran one of those with a set of M.W. heads, intake and 750 carbs, we could slow that car down a tenth by moving the shift points in 1st and 2nd gear from 6400 RP to 7000 RPM. That was with a Isky 616-590 grind with all Isky valve train parts with the springs set up the way they wanted them My point is you will have to take the car out and try different shift points to find out what works best in your combination Converter, car weight, rear gear and trans ratio, tire size and so on all play a part on what works best on shift points BTW, I shift my 518 low deck pump gas stroker at 7300 for the best ETs
Last edited by Cab_Burge; 09/27/09 06:18 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: where do u shift your big block??
[Re: MoparJoe]
#480731
09/27/09 06:29 PM
09/27/09 06:29 PM
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Joined: May 2008
Posts: 902 Mopar Lane,Mississippi
67HEMI
super stock
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super stock
Joined: May 2008
Posts: 902
Mopar Lane,Mississippi
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I shift my 501 at 6500 and cross at 6800 with lil ez 295's. My head and cam combo are easy on springs and parts and makes good torque. Best of a 10.22 @ 129 in a 3800 pound sled.
'33 Plymouth 5 Window Coupe Blown Aluminum HEMI w/bolt ons (under construction)
'69 Chrysler 300 Convertible 375 HP 440
'71 Plymouth Duster 360 W/EFI (Wife's Ride)
'12 Ram MegaCab Dually 6.7 Cummins
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Re: where do u shift your big block??
[Re: blownzoom440]
#480733
09/27/09 07:07 PM
09/27/09 07:07 PM
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Joined: Nov 2003
Posts: 6,293 Rock Springs
Bob_Coomer
master
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master
Joined: Nov 2003
Posts: 6,293
Rock Springs
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557" aluminum wedge .800 cam 15:1 compression on alky. launch at 6K and shift at 7400-7500 rpms.
[color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: where do u shift your big block??
[Re: moparmattkos]
#480734
09/27/09 07:10 PM
09/27/09 07:10 PM
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Joined: Jul 2005
Posts: 8,647 ELYRIA,OH
blownzoom440
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Joined: Jul 2005
Posts: 8,647
ELYRIA,OH
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Quote:
I have a 451 stroker what kinda rpms do these like the most with a solid flat tappet cam? I am shifting at 6200 now and a few people say the 451 pulls the best it like 7200 any thoughts on this?
maybe advance the cam 4*
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Re: where do u shift your big block??
[Re: B1KILLER]
#480736
09/27/09 11:35 PM
09/27/09 11:35 PM
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Joined: Dec 2006
Posts: 4,647 aotearoa
rebel
master
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master
Joined: Dec 2006
Posts: 4,647
aotearoa
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512 indymaxx B engine with 4.88 gears. change gear @ 7k cross the line @ 7200 doing 9.5@139mph with TF.
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