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RPM at the stripe?? #1602167 04/02/14 03:35 PM 04/02/14 03:35 PM
Joined: Dec 2007 Posts: 12,587 Great Neck,LI,new york hemi-itis OP I Live Here
hemi-itis OP I Live Here Joined: Dec 2007 Posts: 12,587 Great Neck,LI,new york	I'm going over the finish line at 7300 and would like to see it around 66-6700 rpm.Could this be done by going from a 31 inch tall tire to a 33 inch tall tire?? Would also like to loosen the stall but that would increase the RPM at the stripe. Now have a Dana with 4:10 & 31 inch tall tire. Peak Tq is around 5000 RPM and HP is 6200 HEMI-ITIS has no cure. My condition is fully BLOWN!!

Re: RPM at the stripe?? [Re: hemi-itis] #1602168 04/02/14 04:23 PM 04/02/14 04:23 PM
Joined: Jul 2004 Posts: 19,318 State of confusion T Thumperdart I Live Here
Thumperdart I Live Here T Joined: Jul 2004 Posts: 19,318 State of confusion	Watcha worried bout, that thing should be happy there.......... 72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....

Re: RPM at the stripe?? [Re: hemi-itis] #1602169 04/02/14 04:35 PM 04/02/14 04:35 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Figure the percentage of change in the tire dia.. then use that on the rpm

Re: RPM at the stripe?? [Re: MR_P_BODY] #1602170 04/02/14 05:14 PM 04/02/14 05:14 PM
Joined: Feb 2005 Posts: 20,184 PA. pittsburghracer "Little"John
pittsburghracer "Little"John Joined: Feb 2005 Posts: 20,184 PA.	http://www.wallaceracing.com/Calculators.htm 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: RPM at the stripe?? [Re: hemi-itis] #1602171 04/02/14 05:20 PM 04/02/14 05:20 PM
Joined: Nov 2005 Posts: 690 New Hampshire, USA O oldiron mopar
oldiron mopar O Joined: Nov 2005 Posts: 690 New Hampshire, USA	(31/33)*7300 = 6857 66 Belvedere Vert, 4 Speed/Jerico, slowly, very slowly, getting faster - NA LD Wedge New New Best: 10.56 @129 68 B'cuda 4 gear Jerico - Another New Best of 9.86 & Trying to slow up https://www.youtube.com/watch?v=T4jDLKwd9Gs

Re: RPM at the stripe?? [Re: oldiron] #1602172 04/02/14 05:22 PM 04/02/14 05:22 PM
Joined: Dec 2007 Posts: 12,587 Great Neck,LI,new york hemi-itis OP I Live Here
hemi-itis OP I Live Here Joined: Dec 2007 Posts: 12,587 Great Neck,LI,new york	I think I see a set of 10.5w X 33 in my future OR,,,would a set of 3:73's with a looser converter be better??? Last edited by hemi-itis; 04/02/14 05:38 PM. HEMI-ITIS has no cure. My condition is fully BLOWN!!

Re: RPM at the stripe?? [Re: hemi-itis] #1602173 04/02/14 07:27 PM 04/02/14 07:27 PM
Joined: Oct 2003 Posts: 4,013 South Park, Pa. 68LAR master
68LAR master Joined: Oct 2003 Posts: 4,013 South Park, Pa.	Because of tire clearance, I was looking at dropping down to a 4.30 or 4.10 gear. I'm going thru the traps at close to 6500 with 4.56 and a 29" tall tire. My concern is what affect this would have on my short times. Remember, I've got a heavy stick car. Don''t mean to hi-jack this post. Just thinking out loud on the web. 4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight

Re: RPM at the stripe?? [Re: 68LAR] #1602174 04/02/14 07:39 PM 04/02/14 07:39 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Because of tire clearance, I was looking at dropping down to a 4.30 or 4.10 gear. I'm going thru the traps at close to 6500 with 4.56 and a 29" tall tire. My concern is what affect this would have on my short times. Remember, I've got a heavy stick car. Don''t mean to hi-jack this post. Just thinking out loud on the web. Your gonna loose torque due to ratio... but with a stick you can jack up the revs... will you see the change... maybe not(on the torque) but your revs will drop

Re: RPM at the stripe?? [Re: 68LAR] #1602175 04/02/14 08:18 PM 04/02/14 08:18 PM
Joined: Dec 2007 Posts: 12,587 Great Neck,LI,new york hemi-itis OP I Live Here
hemi-itis OP I Live Here Joined: Dec 2007 Posts: 12,587 Great Neck,LI,new york	Quote: Because of tire clearance, I was looking at dropping down to a 4.30 or 4.10 gear. I'm going thru the traps at close to 6500 with 4.56 and a 29" tall tire. My concern is what affect this would have on my short times. Remember, I've got a heavy stick car. Don''t mean to hi-jack this post. Just thinking out loud on the web. NOT a hi-jack,we have a similar situation.We both need to lower the RPM at the stripe HEMI-ITIS has no cure. My condition is fully BLOWN!!

Re: RPM at the stripe?? [Re: hemi-itis] #1602176 04/02/14 10:07 PM 04/02/14 10:07 PM
Joined: Mar 2006 Posts: 9,847 MI, usa dvw master
dvw master Joined: Mar 2006 Posts: 9,847 MI, usa	Quote: I'm going over the finish line at 7300 and would like to see it around 66-6700 rpm.Could this be done by going from a 31 inch tall tire to a 33 inch tall tire?? Would also like to loosen the stall but that would increase the RPM at the stripe. Now have a Dana with 4:10 & 31 inch tall tire. Peak Tq is around 5000 RPM and HP is 6200 Al, that must be a inefficient converter. I go through at 6900 with 4.10/10.5x31W/147 mph. Flash stall is 5700 rpm Doug

Re: RPM at the stripe?? [Re: dvw] #1602177 04/02/14 10:27 PM 04/02/14 10:27 PM
Joined: May 2003 Posts: 13,200 aZLiViN J J_BODY I Live Here
J_BODY I Live Here J Joined: May 2003 Posts: 13,200 aZLiViN	I'm no expert.... but I was thinking the same thing dvw brought up. I wasn't making a ton of hp with my Mirada (high 9s), but with a 29.5 slick and 4.10 gear I was trapping in the 6200-6400 range.

Re: RPM at the stripe?? [Re: J_BODY] #1602178 04/02/14 10:43 PM 04/02/14 10:43 PM
Joined: Jul 2004 Posts: 19,318 State of confusion T Thumperdart I Live Here
Thumperdart I Live Here T Joined: Jul 2004 Posts: 19,318 State of confusion	I`m crossing the line at around 7200+ w/an 8" 5000+ vert and a 29" tire w/4.11`s.............. 72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....

Re: RPM at the stripe?? [Re: Thumperdart] #1602179 04/03/14 12:21 AM 04/03/14 12:21 AM
Joined: Dec 2007 Posts: 12,587 Great Neck,LI,new york hemi-itis OP I Live Here
hemi-itis OP I Live Here Joined: Dec 2007 Posts: 12,587 Great Neck,LI,new york	I'm pulling the trans out this weekend Something ain't right This converter is 1 year old HEMI-ITIS has no cure. My condition is fully BLOWN!!

Re: RPM at the stripe?? [Re: hemi-itis] #1602180 04/03/14 01:00 AM 04/03/14 01:00 AM
Joined: Oct 2010 Posts: 2,408 Ambridge, Pa. R rickraw top fuel
rickraw top fuel R Joined: Oct 2010 Posts: 2,408 Ambridge, Pa.	Check the stator, should lockup spinning one way & freewheel the other way. Easy check.

Re: RPM at the stripe?? [Re: rickraw] #1602181 04/03/14 01:35 AM 04/03/14 01:35 AM
Joined: Jan 2004 Posts: 8,285 fredericksburg,va C cudaman1969 master
cudaman1969 master C Joined: Jan 2004 Posts: 8,285 fredericksburg,va	I would say it all depends what mph you'r going thru the traps, to many variables to compare with different cars. What is the mph? My engine was turning 7000 but drive shaft was 5600 -a lot of slippage, still went 125 mph in eigth. Sent vert back two more times to tighten up, check that first.

Re: RPM at the stripe?? [Re: cudaman1969] #1602182 04/03/14 07:51 AM 04/03/14 07:51 AM
Joined: Mar 2003 Posts: 1,629 pa 572charger top fuel
572charger top fuel Joined: Mar 2003 Posts: 1,629 pa	i,m with doug check the convertor , ive got 4.30 gear 31.50 tall et streets and i shift at 6800 go thu traps at 7000 on a good pass with good air runnin 9.60s -9.70s ati convertor slip is only 8% it pulls like a frieght train in high gear 142mph !!! 3900lbs , 606 hemi pump gas best 9.60 at 142mph on motor 05 hemi daytona 1500 go-mango 4wd quadcab 2007 hotrod mag pump gas drags runner up, roadkill nights dodge big tire winner 2018 2019 back to back

Re: RPM at the stripe?? [Re: hemi-itis] #1602183 04/03/14 08:18 AM 04/03/14 08:18 AM
Joined: Nov 2009 Posts: 2,177 ill D dennismopar73 top fuel
dennismopar73 top fuel D Joined: Nov 2009 Posts: 2,177 ill	Quote: I'm going over the finish line at 7300 and would like to see it around 66-6700 rpm.Could this be done by going from a 31 inch tall tire to a 33 inch tall tire?? Would also like to loosen the stall but that would increase the RPM at the stripe. Now have a Dana with 4:10 & 31 inch tall tire. Peak Tq is around 5000 RPM and HP is 6200 WOW! That's a ton rpms if that's correct wit 410 gear ! I think the vert you got is in need of repairs

Re: RPM at the stripe?? [Re: dvw] #1602184 04/03/14 08:59 AM 04/03/14 08:59 AM
Joined: Dec 2005 Posts: 872 NJ SSDAcuda super stock
SSDAcuda super stock Joined: Dec 2005 Posts: 872 NJ	Quote: Quote: I'm going over the finish line at 7300 and would like to see it around 66-6700 rpm.Could this be done by going from a 31 inch tall tire to a 33 inch tall tire?? Would also like to loosen the stall but that would increase the RPM at the stripe. Now have a Dana with 4:10 & 31 inch tall tire. Peak Tq is around 5000 RPM and HP is 6200 Al, that must be a inefficient converter. I go through at 6900 with 4.10/10.5x31W/147 mph. Flash stall is 5700 rpm Doug Exactly. Al sometimes the weight of the car and the gear have opposite effects. I thought you bought a racepak, and if you hook it up you can see converter slippage at the stripe. Will tell you facts. With that said, I would try a 4.30 and the car will tell you the answer... SS/DA 1924

Re: RPM at the stripe?? [Re: SSDAcuda] #1602185 04/03/14 11:00 AM 04/03/14 11:00 AM
Joined: Dec 2007 Posts: 12,587 Great Neck,LI,new york hemi-itis OP I Live Here
hemi-itis OP I Live Here Joined: Dec 2007 Posts: 12,587 Great Neck,LI,new york	Quote: Quote: Quote: I'm going over the finish line at 7300 and would like to see it around 66-6700 rpm.Could this be done by going from a 31 inch tall tire to a 33 inch tall tire?? Would also like to loosen the stall but that would increase the RPM at the stripe. Now have a Dana with 4:10 & 31 inch tall tire. Peak Tq is around 5000 RPM and HP is 6200 Al, that must be a inefficient converter. I go through at 6900 with 4.10/10.5x31W/147 mph. Flash stall is 5700 rpm Doug Exactly. Al sometimes the weight of the car and the gear have opposite effects. I thought you bought a racepak, and if you hook it up you can see converter slippage at the stripe. Will tell you facts. With that said, I would try a 4.30 and the car will tell you the answer... Almost finished installing the Racepak,that was one of my winter upgrades.Still have a week or so before I get into the chassis shop for those upgrades.Car won't make a pass until I get this stuff squared away HEMI-ITIS has no cure. My condition is fully BLOWN!!

Re: RPM at the stripe?? [Re: hemi-itis] #1602186 04/03/14 02:09 PM 04/03/14 02:09 PM
Joined: Jul 2010 Posts: 680 COLUMBUS, OH W Whompin_Wedge mopar
Whompin_Wedge mopar W Joined: Jul 2010 Posts: 680 COLUMBUS, OH	Yea I agree on converter. We are 29.5 tires with a 4.56 and go through at 7200.. Casey

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