230 - 260 leaf springs and 1.26" torsion bars - Moparts Forums

Register Log In Moparts Forums Corners Are Best - Handling Tech 230 - 260 leaf springs and 1.26" torsion bars

Print Thread

Page 2 of 3

1

2

3

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: Mopar Mitch] #1485540 09/08/13 07:03 AM 09/08/13 07:03 AM
Joined: Aug 2010 Posts: 208 Munich, Bavaria D docford OP enthusiast
docford OP enthusiast D Joined: Aug 2010 Posts: 208 Munich, Bavaria	Quote: One additional concern should be, if the front spring eye location is changed up/down then to use angle shims at the leaf/differential to re-adjust the drive shaft / pinion angle. Good point! What pinion angle would you dial in on a roadracing HEMI car ? We used -4� in drag racing, but that might be a lot for the road circuit

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: docford] #1485541 09/09/13 10:56 AM 09/09/13 10:56 AM
Joined: Jan 2010 Posts: 1,442 NW Chicago suburban area Mopar Mitch pro stock
Mopar Mitch pro stock Joined: Jan 2010 Posts: 1,442 NW Chicago suburban area	Docford -- I'm uncertain what to advise for the pinion angle for the car you describe. I believe the Mopar Performance Chassis book, etc, advise how to do this.... you'll probably need an angle gage. (I had a racer-pro (Jim McKamey) do mine as I was also having the entire suspension balanced... back in the mid-80s.) Mopar Mitch "Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers! Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: Mopar Mitch] #1485542 11/24/13 07:03 PM 11/24/13 07:03 PM
Joined: Aug 2010 Posts: 208 Munich, Bavaria D docford OP enthusiast
docford OP enthusiast D Joined: Aug 2010 Posts: 208 Munich, Bavaria	Torsion bars and leaf spring came in this week. They were custom made by FirmFeel

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: docford] #1485543 11/24/13 08:58 PM 11/24/13 08:58 PM
Joined: Dec 2003 Posts: 22,696 Bitopia J jcc If you can't dazzle em with diamonds..
jcc If you can't dazzle em with diamonds.. J Joined: Dec 2003 Posts: 22,696 Bitopia	Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: docford] #1485544 11/25/13 03:36 PM 11/25/13 03:36 PM
Joined: Jan 2009 Posts: 813 Ontario,Canada brads70 super stock
brads70 super stock Joined: Jan 2009 Posts: 813 Ontario,Canada	Quote: Torsion bars and leaf spring came in this week. They were custom made by FirmFeel Post up some pictures please!

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: docford] #1485545 11/25/13 06:59 PM 11/25/13 06:59 PM
Joined: Jan 2010 Posts: 1,442 NW Chicago suburban area Mopar Mitch pro stock
Mopar Mitch pro stock Joined: Jan 2010 Posts: 1,442 NW Chicago suburban area	What were the final specs on the TBs and leafs? This is for a hemi-Cuda? Which body.. E or A? Which gen-Hemi? Mopar Mitch "Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers! Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: Mopar Mitch] #1485546 12/22/13 07:52 AM 12/22/13 07:52 AM
Joined: Aug 2010 Posts: 208 Munich, Bavaria D docford OP enthusiast
docford OP enthusiast D Joined: Aug 2010 Posts: 208 Munich, Bavaria	Quote: What were the final specs on the TBs and leafs? This is for a hemi-Cuda? Which body.. E or A? Which gen-Hemi? 1.24" torsion bars 1.25" frt sway bar 230# leaf springs 0.75 rear sway bar 1970 Cuda with 426 HEMI 3780# w driver and half tank of gas weight bias 54% frt 46% rear complet car can be seen here http://www.hemicuda-france.com Last edited by docford; 12/22/13 08:01 AM.

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: docford] #1485547 12/22/13 08:17 AM 12/22/13 08:17 AM
Joined: Jan 2003 Posts: 27,466 So Cal autoxcuda Too Many Posts
autoxcuda Too Many Posts Joined: Jan 2003 Posts: 27,466 So Cal	Quote: Quote: What were the final specs on the TBs and leafs? This is for a hemi-Cuda? Which body.. E or A? Which gen-Hemi? 1.24" torsion bars 1.25" frt sway bar 230# leaf springs 0.75 rear sway bar 1970 Cuda with 426 HEMI 3780# w driver and half tank of gas weight bias 54% frt 46% rear complet car can be seen here http://www.hemicuda-france.com I assume those T-bars were made on the factory A/B/E-body 1.25" front and rear hex? Are those T-bars factory E/B body length? I think comparing to a late 60's to mid 70's Nascar cup car chassis it out the window. Those T-bars are a different length AND the lower control arms are a different length too. So the calcs to get the wheel rates are a different animal than your stock E/B body LCA and T-bar length. I also would not assume the '70 Trans Am cars uses stock length T-bars and LCA's. Not saying they didn't, but I would want a measurement confirmation. IMHO, a 230 lbs rear spring on a road course seem like a lot for 1.24" dia E/B-body length torsion bars. But, what was Dick Ross's recomendation/advice? It looks like you have been racing this same car for the past 3 years? What springs were in it then? Was there a problem with that spring package? Last edited by autoxcuda; 12/22/13 08:34 AM.

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: autoxcuda] #1485548 12/23/13 03:42 AM 12/23/13 03:42 AM
Joined: Jan 2010 Posts: 1,442 NW Chicago suburban area Mopar Mitch pro stock
Mopar Mitch pro stock Joined: Jan 2010 Posts: 1,442 NW Chicago suburban area	On my T/A, I run the 1.24 TBs and 225 pound/inch with 5" free arch rear leafs (fiberglass mono-leafs from FlexaForm)... compressed to about 1.5" remaining arch,... and have 1.25" solid fron sway bar, 1.0" solid rear sway bar, Red re-valved Konis front/rear... car handles great, very neutral; weight is ~3150 w/o driver and with ~1/8 tank of gas (52% front, 48% rear)... this data is when the car is setup for national SCCA E/SP competition. even on the hi-speed road courses it handles great.. still relatively neutral. I think the weight% with the 426 Hemi up front is going to be greater than what is indicated...??? I'd use a 1.0" rear sway bar to help offset the front weight. 7968259-Mitch'sChallenger-16.jpg (115 downloads) Mopar Mitch "Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers! Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: Mopar Mitch] #1485549 12/23/13 12:43 PM 12/23/13 12:43 PM
Joined: Jan 2003 Posts: 5,388 Pikes Peak Country T TC@HP2 master
TC@HP2 master T Joined: Jan 2003 Posts: 5,388 Pikes Peak Country	The more you move weight rearward, the higher your rear rates need to go to balance things out. With a 54% front bias WITH an elephant up front, more leaf rate is probably required. I would have guess a Hemi equipped car to be more like 58-60% front weight, so the change to 54% is a significant change.

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: TC@HP2] #1485550 12/23/13 05:52 PM 12/23/13 05:52 PM
Joined: Jan 2010 Posts: 1,442 NW Chicago suburban area Mopar Mitch pro stock
Mopar Mitch pro stock Joined: Jan 2010 Posts: 1,442 NW Chicago suburban area	Best bet would be removing weight from the car.. that 426 hemi is very heavy. It'd be interesting to see the actual weigh scale results, each respective corner. Mopar Mitch "Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers! Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: Mopar Mitch] #1485551 02/02/14 07:11 PM 02/02/14 07:11 PM
Joined: Aug 2010 Posts: 208 Munich, Bavaria D docford OP enthusiast
docford OP enthusiast D Joined: Aug 2010 Posts: 208 Munich, Bavaria	Quote: Best bet would be removing weight from the car.. that 426 hemi is very heavy. It'd be interesting to see the actual weigh scale results, each respective corner. Weight with half a tank of gas and driver is 3,780 lbs Front/Rear bias is 54/46 Left/Right bias is 52/48 We are now moving the fuel and dry sump tank to get 50/50 left to right weight bias. We are also removing about 40 lbs by doing that, thanks to shorter routing of the -16 oil hoses and thus, carrying less oil in the dry sump circuit Last edited by docford; 02/02/14 07:14 PM.

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: docford] #1485552 08/17/14 06:05 AM 08/17/14 06:05 AM
Joined: Aug 2010 Posts: 208 Munich, Bavaria D docford OP enthusiast
docford OP enthusiast D Joined: Aug 2010 Posts: 208 Munich, Bavaria	The new springs worked wonders on the Nurburgring, as we were able tonshave a full 26 seconds of our best lap time from 2012. Lapping the 14 mile roadcourse in 8.52 made us a Porsche Terror !! Here is the onboard video http://www.hemicuda-france.com/2014/08/onboard-the-hemicuda-around-the-nordschleife.html

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: docford] #1485553 08/17/14 10:35 AM 08/17/14 10:35 AM
Joined: Jan 2003 Posts: 28,067 Irving, TX feets Senior Management
feets Senior Management Joined: Jan 2003 Posts: 28,067 Irving, TX	Very nice! It begs the question of what time could it turn on a dry track with more cooperative traffic? We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: docford] #1485554 08/17/14 02:00 PM 08/17/14 02:00 PM
Joined: Jun 2007 Posts: 2,432 NorCal RylisPro top fuel
RylisPro top fuel Joined: Jun 2007 Posts: 2,432 NorCal	That car is awesome! Man you got big balls running hard in the rain! Nice save too! Last time I was in the wet my car spun and had a fender bender. Your car moves pretty good despite the weight. The leafs and t-bars must be heavy but really make a difference! 73 `Cuda Instagram: @rylispro YouTube: RylisPro www.rylispro.com 925-214-9192

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: RylisPro] #1485555 08/17/14 03:02 PM 08/17/14 03:02 PM
Joined: Feb 2011 Posts: 4,302 Nebraska 72Swinger master
72Swinger master Joined: Feb 2011 Posts: 4,302 Nebraska	I've really been kicking around the splined front swaybar idea. Basing it from my existing Hotchkis mounts, it really would'nt be to much of a stretch. Mopar to the bone!!!

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: 72Swinger] #1485556 08/17/14 07:22 PM 08/17/14 07:22 PM
Joined: Dec 2003 Posts: 22,696 Bitopia J jcc If you can't dazzle em with diamonds..
jcc If you can't dazzle em with diamonds.. J Joined: Dec 2003 Posts: 22,696 Bitopia	I assume what I am asking about is just a video or mounting visual distortion artifact, but does it look like the trans tunnel area/rear TB mounting crossmember flops around a lot based on bumps and/or cornering? Nothing else inside the car seems to move much, relative to camera, but this area. If so wow, if not nevermind. Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: docford] #1485557 08/18/14 02:47 AM 08/18/14 02:47 AM
Joined: May 2007 Posts: 553 Sac, CA, USA N ntstlgl1970 mopar
ntstlgl1970 mopar N Joined: May 2007 Posts: 553 Sac, CA, USA	that was a really cool video

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: RylisPro] #1485558 08/18/14 04:57 AM 08/18/14 04:57 AM
Joined: Aug 2010 Posts: 208 Munich, Bavaria D docford OP enthusiast
docford OP enthusiast D Joined: Aug 2010 Posts: 208 Munich, Bavaria	Quote: That car is awesome! Man you got big balls running hard in the rain! Nice save too! Last time I was in the wet my car spun and had a fender bender. Your car moves pretty good despite the weight. The leafs and t-bars must be heavy but really make a difference! Thanks yes , the Cuda now is really fun to drive and one could even let his mom cruise it on the street

Re: 230 - 260 leaf springs and 1.26" torsion bars [Re: jcc] #1485559 08/18/14 04:59 AM 08/18/14 04:59 AM
Joined: Aug 2010 Posts: 208 Munich, Bavaria D docford OP enthusiast
docford OP enthusiast D Joined: Aug 2010 Posts: 208 Munich, Bavaria	Interesting observation! I'll take a second look at the video

Page 2 of 3

1

2

3

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer, tommoparts

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1