421/434 RPM Range

luckydog · 02-21-2009, 12:19 PM

What kind of RPM to you bigger small block guys run?

Bob Verwold · 02-21-2009, 01:11 PM

Not enough...hahaha
you have email

Geerhead55 · 02-21-2009, 02:39 PM

Aw,,Bob,,,,, I was hoping you'd answer him on this. I've been kicking around the idea of doing one of these engines for a while, but am hesitant because I have 4:88s (Dana 60) and a 29 1/2 tall tire and worry that I would spin it too tight on the top end. Just curious I guess,, oh well, thanks anyway.
Danny Durham

Lynnmsp · 02-21-2009, 09:50 PM

I run a 434 and shift at 6800 and go thru at 7000 to 7100.

SUPER STREET ROB · 02-22-2009, 12:41 AM

I Run a 434 in a 3000# car with a 350 turbo trans and a 430 rear gear and I shift at 6800 and go threw at 6800

Bob Verwold · 02-22-2009, 08:51 AM

Quote:

Originally Posted by Lynnmsp

I run a 434 and shift at 6800 and go thru at 7000 to 7100.

I'm guessing your running a glide, what rear gear ,how tall of a tire and your MPH. I'm wondering if my converter is going south...............

Lynnmsp · 02-22-2009, 10:26 AM

Bob,I run a glide with a 4.71 gear 14-32 tire.On the stop 134-135MPH.I only made one run off the stop and it went 140MPH.

Eddie Arnold Jr. · 02-23-2009, 11:09 AM

Not counting last year ,,,,, I've ran a small block for Quite a while .

I ran 5.00 gears , 1.92 1st gear in the trans , left on the converter every pass @ 5800 RPM and went through
at 7600/7700 ,,,, in super gas Trim the car weighed 2240 and would run 9.900 @ 148/151 depending on air .

It was a 421 with Dart 23 degree heads .

I ran good parts rebuilt engine ( rings, bearings , head gaskets etc... ) every 200 runs !

Colorful racer # 37

rod butcher · 02-23-2009, 02:02 PM

My 434 in S/St trim 2830 lbs runs 10.90@149-151 depending on the air. Motor turns 7600 with 14.5x 32 and 4.57 gear. Motor makes 830@7400 w/ 676 ft/lbs torque @ 5800. When I first built this motor I ran 4.86 gear and 8" convertor in S/G trim (2600lbs) and went thru @ 8000. I now use 9" conv with the 4.57 gear.

02-21-2009, 12:19 PM	#1
luckydog Member Join Date: Oct 2007 Location: Ottawa, OH Posts: 274 Likes: 0 Liked 0 Times in 0 Posts	421/434 RPM Range What kind of RPM to you bigger small block guys run? __________________ Damien Hazelton Lucky Dog Racing Last edited by luckydog; 02-21-2009 at 01:00 PM.

02-21-2009, 01:11 PM	#2
Bob Verwold Senior Member Join Date: Jul 2007 Location: Fayetteville Ohio Posts: 656 Likes: 0 Liked 0 Times in 0 Posts	Re: 421/434 RPM Range Not enough...hahaha you have email

02-21-2009, 02:39 PM	#3
Geerhead55 VIP Member Join Date: Sep 2002 Location: Tacoma, Washington Posts: 1,632 Likes: 0 Liked 5 Times in 5 Posts	Re: 421/434 RPM Range Aw,,Bob,,,,, I was hoping you'd answer him on this. I've been kicking around the idea of doing one of these engines for a while, but am hesitant because I have 4:88s (Dana 60) and a 29 1/2 tall tire and worry that I would spin it too tight on the top end. Just curious I guess,, oh well, thanks anyway. Danny Durham

02-21-2009, 09:50 PM	#4
Lynnmsp Junior Member Join Date: Feb 2005 Location: USA Posts: 14 Likes: 0 Liked 0 Times in 0 Posts	Re: 421/434 RPM Range I run a 434 and shift at 6800 and go thru at 7000 to 7100.

02-22-2009, 12:41 AM	#5
SUPER STREET ROB Member Join Date: May 2008 Location: CONOWINGO MD. Posts: 119 Likes: 0 Liked 0 Times in 0 Posts	Re: 421/434 RPM Range I Run a 434 in a 3000# car with a 350 turbo trans and a 430 rear gear and I shift at 6800 and go threw at 6800

02-22-2009, 10:26 AM	#7
Lynnmsp Junior Member Join Date: Feb 2005 Location: USA Posts: 14 Likes: 0 Liked 0 Times in 0 Posts	Re: 421/434 RPM Range Bob,I run a glide with a 4.71 gear 14-32 tire.On the stop 134-135MPH.I only made one run off the stop and it went 140MPH.

02-23-2009, 11:09 AM	#8
Eddie Arnold Jr. Member Join Date: Aug 2003 Location: Solon , Ohio Posts: 257 Likes: 0 Liked 0 Times in 0 Posts	Re: 421/434 RPM Range Not counting last year ,,,,, I've ran a small block for Quite a while . I ran 5.00 gears , 1.92 1st gear in the trans , left on the converter every pass @ 5800 RPM and went through at 7600/7700 ,,,, in super gas Trim the car weighed 2240 and would run 9.900 @ 148/151 depending on air . It was a 421 with Dart 23 degree heads . I ran good parts rebuilt engine ( rings, bearings , head gaskets etc... ) every 200 runs ! Colorful racer # 37 __________________ Eddie Arnold Jr. 3934 SC, SG

02-23-2009, 02:02 PM	#9
rod butcher Member Join Date: Dec 2005 Posts: 248 Likes: 291 Liked 129 Times in 24 Posts	Re: 421/434 RPM Range My 434 in S/St trim 2830 lbs runs 10.90@149-151 depending on the air. Motor turns 7600 with 14.5x 32 and 4.57 gear. Motor makes 830@7400 w/ 676 ft/lbs torque @ 5800. When I first built this motor I ran 4.86 gear and 8" convertor in S/G trim (2600lbs) and went thru @ 8000. I now use 9" conv with the 4.57 gear.