|
SALTRACER
Guest
|
 |
« on: December 13, 2008, 12:23:45 PM » |
|
I am looking for a list of horsepower loss seen from various rearend types. (9" QC 12 bolt and so forth.)If I remember correct It was real results seen on a dyno. I thought it may have been on this site. I have done a search on this site and other boards, but I am unable to find the sheet that I remember. If anyone has this list could they post it or pm it to me. thanks Randy
|
|
|
|
|
Logged
|
|
|
|
Ron Gibson
Full Member
 Online
Age: 71
Location: Omaha NE
Posts: 181
|
|
« Reply #1 on: December 13, 2008, 11:16:27 PM » |
|
Randy
I remember that post and couldn't find it either (oldtimers disease). IIRC a 12 bolt was best due to pinion angle, followed by a 9" that used 4 HP more than the 12 bolt. Then the quick change used 10 HP more than the 12 bolt. Only the three rears were tested. YMMV
Ron Gibson, Omaha NE
|
|
|
|
|
Logged
|
Life is an abrasive. Whether you get ground away or polished to a shine depends on what you are made of.
|
|
|
|
dwarner
Guest
|
|
« Reply #2 on: December 13, 2008, 11:37:06 PM » |
|
Sparky was the one with the research IIRC. May have been John Beckett.
DW
|
|
|
|
|
Logged
|
|
|
|
jimmy six
Hero Member
 Offline
Age: 67
Location: SoCal
Posts: 1872
|
|
« Reply #3 on: December 14, 2008, 12:24:18 AM » |
|
Put in a 57-64 Pontiac..........Best #'s for a stong piece with the right pinion angle...
|
|
|
|
|
Logged
|
First GMC 6 powered Fuel roadster over 200, with 2 red hats. Pit crew for Patrick Tone's Super Stock #49 Camaro
|
|
|
desotoman
Hero Member
Offline
Location: So Cal.
Posts: 1845
Temple's "Got'Cha"
|
|
« Reply #4 on: December 14, 2008, 01:00:31 PM » |
|
As I recall "maguromic" screen name posted some accurate figures on rearends. I just tried to look up what he said, but for some reason was denied access to his past posts. Hope this helps.
Tom G.
|
|
|
|
|
Logged
|
"Got'Cha" was first run in 1974. Bill Temple entered both 2 clubs in 1976 with records in AA/BGR. At El Mirage 201.79 and Bonneville at 220.
In 1977 Greg Temple started driving "Got'Cha" and entered the El Mirage Dirty 2 club in 1979 @ 201.97. Greg went on to set two records at Bonneville, one in 1981 at 241.848, then in 1991 he set another record at 262.230
Bill and Greg were the first father and son to enter the El Mirage Dirty 2 club. They broke the D/BFR at Bonneville in 1981 @ 241 with top speed of 249. This record still stands today. In 1991 they set the A/BFR @ 262 which was later broke by Duane McKinney.
|
|
|
Milwaukee Midget
Global Moderator
Hero Member
Offline
Age: 52
Location: Beerhaven, Wisconsin
Posts: 2224
Maximum Cram
|
|
« Reply #5 on: December 14, 2008, 01:36:21 PM » |
|
Had a similar post last January - a few numbers, but some decent general thoughts on the topic. http://www.landracing.com/forum/index.php/topic,3424.0.htmlSparky's input - "Rule of thumb---the closer the pinion shaft is to the center line of the ring gear -- the less drag it will have". That made sense to me, less side loading, less of a helical cut, less parasitic loss. |
|
|
|
|
Logged
|
"Information - we want - information"
|
|
|
|
SALTRACER
Guest
|
|
« Reply #6 on: December 14, 2008, 01:47:38 PM » |
|
Thanks for all of the replies. I have dug through the archives on the email list and found #s similar to what Ron posted. Thanks for looking guys, but if anyone finds the spreadsheet in question please post it. thanks Randy
|
|
|
|
|
Logged
|
|
|
|
|
saltfever
Guest
|
|
« Reply #7 on: December 15, 2008, 04:30:14 AM » |
|
As I recall "maguromic" screen name posted some accurate figures on rearends. I just tried to look up what he said, but for some reason was denied access to his past posts. Hope this helps. It looks like Jon has implemented some kind of privacy filtering. You can't look up anyone's profile anymore or see all of their past postings. As you have indicated that was a very useful feature. I hope the Ratliff fiasco was not the reason for the loss in functionality. Looking up someone's postings was as good as having an archive feature. It was a fast way to get information.  |
|
|
|
|
Logged
|
|
|
|
SPARKY
Global Moderator
Hero Member
Offline
Age: 69
Location: Phoenix
Posts: 2840
|
|
« Reply #8 on: December 15, 2008, 07:16:21 AM » |
|
Guys remember---its precentage--loss gose up with power---greatest ratio selection is GM 7.5" fords new 8.8 is basacially the old GM 10-12---Rear axel selection the gift that keeps on giving---Merry Christmas  |
|
|
|
|
Logged
|
" I am a firm believer in the people. If given the truth, they can be depended upon to meet any national crisis. The great point is to bring them the real facts." A. Lincoln
agendadocumentary.com
|
|
|
|
saltfever
Guest
|
|
« Reply #9 on: December 15, 2008, 11:51:36 PM » |
|
Guys remember---its precentage--loss gose up with power---greatest ratio selection is GM 7.5" (snip . . . ) True, if you are talking about "stock" gear ratios (i.e. OEM gears). However, the 9" Ford has so many "special" aftermarket ratios it surely has the widest selection of any. From NASCAR to circle track, Ford 9" ratios go from stock 2.47 to the 7:xx used in circle track. The last time I looked at a Richmond gear catalog it has 3x the Ford gears than any other brand. If you watch eBay, weird NASCAR ratios appear frequently. A NASCAR ratio would be a special gear cut just for a certain track and motor combination. The cost of cutting a special ratio is trival to a NASCAR team. Also, most of them show up REM conditioned. |
|
|
|
|
Logged
|
|
|
|
|
saltfever
Guest
|
|
« Reply #10 on: December 15, 2008, 11:58:43 PM » |
|
I was going to ask this in a new thread but I think it is a better fit here. If this is "thread jacking or drifting" please let me know. I apologize and will start a new subject.
I see a lot of gears REM conditioned. Does anybody have any data on just how much friction it eliminates? Or any increase in efficiency? Is there a shop on the West coast that does it?
|
|
|
|
|
Logged
|
|
|
|
|
|
|
saltfever
Guest
|
|
« Reply #12 on: December 16, 2008, 03:17:57 AM » |
|
Thanks, Josh. Good explanation of the REM process.  However, like all others, it is difficult to nail down the increased efficiency (if any) it brings. They have some good information in their tech papers although they seem to be primarily focused on formula type road racing. |
|
|
|
|
Logged
|
|
|
|
|
wolcottjl
|
|
« Reply #13 on: December 16, 2008, 07:55:31 AM » |
|
Try this link for REM polishing http://www.remchem.com/They have a few papers published. One of the PDF's on their site made a claim of a drop in temp of up to 50 degrees in an automotive application. |
|
|
|
|
Logged
|
Joel Wolcott
Moving to 2 wheels in 2010
|
|
|
Larry Forstall
Sr. Member
Offline
Age: 69
Location: West Chester, Pa.
Posts: 271
|
|
« Reply #14 on: December 16, 2008, 09:47:33 AM » |
|
Looks like www.mikronite.com is a similar process. All top level pro drag teams use this process to improve the fatigue/fracture life of ring and pinions. I have used it on my straight cut motorcycle transmission gears to decrease friction. Looks cool, the gears have a chrome appearance when returned. Like ceramic bearings I have no idea how much it helps but if one does enough of these things I am sure it has some benefit. All others just turn up the boost.  |
|
|
|
|
Logged
|
|
|
|
|
