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4.11 to 4.56 #903188 01/13/11 12:49 AM 01/13/11 12:49 AM
Joined: Jan 2003 Posts: 274 Visalia, CA. P poison_ivy OP enthusiast
poison_ivy OP enthusiast P Joined: Jan 2003 Posts: 274 Visalia, CA.	I plan on switching from 4.11 to 4.56 and was wondering if there was a formula to figure out how much higher the motor will be revving at the big end. Right now I break thru at approx. 6350 rpm.

Re: 4.11 to 4.56 [Re: poison_ivy] #903189 01/13/11 01:26 AM 01/13/11 01:26 AM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	4.56 would be 10.9% deeper but dont know if it'd be as simple as 6350 + 10.9%= 7045 RPM live every 24 hour block of time like it's your last day on earth

Re: 4.11 to 4.56 [Re: RapidRobert] #903190 01/13/11 01:39 AM 01/13/11 01:39 AM
Joined: Nov 2009 Posts: 2,177 ill D dennismopar73 top fuel
dennismopar73 top fuel D Joined: Nov 2009 Posts: 2,177 ill	do not know enough info for the calc 300 rpm raise ??

Re: 4.11 to 4.56 [Re: dennismopar73] #903191 01/13/11 12:03 PM 01/13/11 12:03 PM
Joined: Jan 2003 Posts: 7,861 Witness Protection Program Kudakidd master
Kudakidd master Joined: Jan 2003 Posts: 7,861 Witness Protection Program	If this is on a street driven car, you're nuts!

Re: 4.11 to 4.56 [Re: Kudakidd] #903192 01/13/11 12:54 PM 01/13/11 12:54 PM
Joined: Jan 2003 Posts: 2,931 P Paul_Fancsali master
Paul_Fancsali master P Joined: Jan 2003 Posts: 2,931	I have driven cars with 4.30s and 4.56 gears and never had a problem yes you do rev but on the street it sure is sweet. By the way a set of 29-31 inch tall tires will really help cutting the gear for a long cruise.

Re: 4.11 to 4.56 [Re: Kudakidd] #903193 01/13/11 05:04 PM 01/13/11 05:04 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: If this is on a street driven car, you're nuts! The fact that you are in the WPP is probably why you have managed to live as long as you have live every 24 hour block of time like it's your last day on earth

Re: 4.11 to 4.56 [Re: RapidRobert] #903194 01/13/11 10:03 PM 01/13/11 10:03 PM
Joined: Jan 2003 Posts: 274 Visalia, CA. P poison_ivy OP enthusiast
poison_ivy OP enthusiast P Joined: Jan 2003 Posts: 274 Visalia, CA.	Thanks for the kind words, kudakidd! It's a race only car. I sure hope it doesn't jump to 7 grand. Just don't want to spin it that high. Going to make the change, so I'll just have to let it be. Last edited by poison_ivy; 01/13/11 10:04 PM.

Re: 4.11 to 4.56 [Re: poison_ivy] #903195 01/13/11 10:35 PM 01/13/11 10:35 PM
Joined: Dec 2004 Posts: 10,558 Rittman Ohio fourgearsavoy I Live Here
fourgearsavoy I Live Here Joined: Dec 2004 Posts: 10,558 Rittman Ohio	Google Wallace racing calculators Every thing you will ever need to calculate ANYTHING to di with your car Gus 6416172-burnoutpicturegus.JPG (21 downloads) 64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60

Re: 4.11 to 4.56 [Re: fourgearsavoy] #903196 01/13/11 10:41 PM 01/13/11 10:41 PM
Joined: Jan 2003 Posts: 20,207 Park Forest, IL slantzilla Too Many Posts
slantzilla Too Many Posts Joined: Jan 2003 Posts: 20,207 Park Forest, IL	http://www.wallaceracing.com/Calculators.htm "Everybody funny, now you funny too."

Re: 4.11 to 4.56 [Re: Kudakidd] #903197 01/13/11 10:48 PM 01/13/11 10:48 PM
Joined: Jan 2003 Posts: 5,044 At a gas station near you B badblack68 master
badblack68 master B Joined: Jan 2003 Posts: 5,044 At a gas station near you	Quote: If this is on a street driven car, you're nuts! I must have totally lost it then. My latest project (ya I know, I said the 68 Charger was my last project...) is a 67 GTX with a dana 60 that has 4:56's in it...Yes, it will be a street car and may make a few passes down the 1/8th strip this coming summer at Winterport Dragway. I also have a clean 66 Belvedere with an real nice 8 3/4 that may end up in the GTX. The GTX was purchased for the wife for all the years she's put up with my Mopar madness. I do remember way back when I was 16 and had a 1970 Charger R/T with a 4:10 dana 60. That was hands down the funnest car I ever owned. Smoked up lots of L-60's with that car! Now I'm 50 and feel like that 16 year old boy all over again.

Re: 4.11 to 4.56 [Re: poison_ivy] #903198 01/13/11 11:31 PM 01/13/11 11:31 PM
Joined: Feb 2005 Posts: 4,318 Prospect, PA BSB67 master
BSB67 master Joined: Feb 2005 Posts: 4,318 Prospect, PA	6350rpm x 4.56/4.11 = new rpm

Re: 4.11 to 4.56 [Re: BSB67] #903199 01/14/11 10:02 AM 01/14/11 10:02 AM
Joined: Jan 2004 Posts: 4,580 Motor City 6 6PKRTSE master
6PKRTSE master 6 Joined: Jan 2004 Posts: 4,580 Motor City	I have 4:10 sure grip in the rear of one of my 70's & driven it on the street like this for almost 20 years. I hardly ever take it on the freeway anyway. I would hate to see how much I have spent on gas but its worth it. I have been thinking lately about dropping it down to a 3:23 sure grip just for doing some freeway cruisin. 1963 Belvedere 440 Max Wedge Tribute 1970 Charger R/T S.E. 440 Six Pack 1970 Challenger R/T, 528 Hemi 1970 Charger 500 S.E. 440 4 BBL 1970 Plymouth Road Runner 383 1974 Chrysler New Yorker 440 1996 2500 RAM 488 V-10 4X4 2004 3500 Dually Cummins 4x4 2012 Challenger R/T Classic.

Re: 4.11 to 4.56 [Re: RapidRobert] #903200 01/14/11 11:06 AM 01/14/11 11:06 AM
Joined: Jan 2003 Posts: 7,861 Witness Protection Program Kudakidd master
Kudakidd master Joined: Jan 2003 Posts: 7,861 Witness Protection Program	Quote: Quote: If this is on a street driven car, you're nuts! The fact that you are in the WPP is probably why you have managed to live as long as you have Touche' Bob. But you did notice the smiley after my reply, right? Gasoline is $3.25 a gallon here, and I was indicating that you're not gonna get good gas mileage w/ 4.56's.

Re: 4.11 to 4.56 [Re: poison_ivy] #903201 01/14/11 06:23 PM 01/14/11 06:23 PM
Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada R RUNCHARGER I Live Here
RUNCHARGER I Live Here R Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada	For sure you will be turning at least 7k if it hold together. Sheldon

Re: 4.11 to 4.56 [Re: RUNCHARGER] #903202 01/14/11 07:54 PM 01/14/11 07:54 PM
Joined: Jan 2003 Posts: 1,481 Outside thedriver pro stock
thedriver pro stock Joined: Jan 2003 Posts: 1,481 Outside	1973 challenger Dana. 4 speed. Low deck.

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