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Re: Racing with A518 -46RH transmission
[Re: YbNoRmAL]
#56624
04/17/08 04:08 PM
04/17/08 04:08 PM
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Anonymous
Unregistered
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Anonymous
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Quote:
Griner makes a fully manual valvebody for the 500/518s. You actually make the 3rd to OD shift with the shifter. 
Wow, I didn't know that! Do they advertise this anywhere?
Anyway, to answer part of the original question...I use a 518/46RH in my Dakota. Not the original one now. I've had a non-lockup version for the past 5 years. Automatic valve body. I turn off the OD at the track.
Doesn't seem to do too bad for a small engine in a fairly heavy truck.  See sig for specs. A 727 "should" be a little quicker but haven't tried one yet because of my gears and highway driving.
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Re: Racing with A518 -46RH transmission
[Re: 416challenger]
#56625
04/17/08 04:34 PM
04/17/08 04:34 PM
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Joined: May 2006
Posts: 1,260
New Mexico
Adobedude
pro stock
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pro stock
Joined: May 2006
Posts: 1,260
New Mexico
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I'll know what the ET gains will be switching from a 46RE to a 727...As I get my CRT 727 installed.
"Supposedly", it "should" be close to a second faster with the 727. The weight differance alone is huge, I suspect close to 75 lbs more for the OD tranny.
2001 Dodge Dakota
408 All Motor
11.27 @ 117.83 mph
2017 NM Mopar Challenge Series Champion.
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Re: Racing with A518 -46RH transmission
[Re: Adobedude]
#56626
04/17/08 05:29 PM
04/17/08 05:29 PM
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Joined: Jan 2003
Posts: 75,060
U.S.S.A.
JohnRR
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I Win
Joined: Jan 2003
Posts: 75,060
U.S.S.A.
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Quote:
I'll know what the ET gains will be switching from a 46RE to a 727...As I get my CRT 727 installed.
"Supposedly", it "should" be close to a second faster with the 727. The weight differance alone is huge, I suspect close to 75 lbs more for the OD tranny.
is that correct , a SECOND faster ??? 75 lbs isn't even worth a tenth ???
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Re: Racing with A518 -46RH transmission
[Re: JohnRR]
#56627
04/17/08 05:34 PM
04/17/08 05:34 PM
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Joined: Nov 2004
Posts: 8,094
Sunnyvale, CA
Jeepmon
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Joined: Nov 2004
Posts: 8,094
Sunnyvale, CA
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Quote:
is that correct , a SECOND faster ???
x2
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Re: Racing with A518 -46RH transmission
[Re: JohnRR]
#56628
04/17/08 05:35 PM
04/17/08 05:35 PM
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Joined: May 2006
Posts: 1,260
New Mexico
Adobedude
pro stock
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pro stock
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New Mexico
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Mainly due to the internals...46RE is a power robber.
We'll see about the 1 second thing, just going by what a few builders have said...Then again, they wanted to sell a tranny.
2001 Dodge Dakota
408 All Motor
11.27 @ 117.83 mph
2017 NM Mopar Challenge Series Champion.
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Re: Racing with A518 -46RH transmission
[Re: Adobedude]
#56631
04/17/08 09:34 PM
04/17/08 09:34 PM
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Anonymous
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Anonymous
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Quote:
Mainly due to the internals...46RE is a power robber.
We'll see about the 1 second thing, just going by what a few builders have said...Then again, they wanted to sell a tranny.
I want some of whatever those guys were smoking. One second? Ain't no freakin way! That would put my little 318 into the elevens and that just ain't gonna happen from a tranny swap. I don't know what a 727 weighs but my 518 is about 170 lbs. A 727 could NOT be enough lighter (internally or externally) for a second in ET even if the OD internals were made of lead. 
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Re: Racing with A518 -46RH transmission
#56632
04/17/08 11:36 PM
04/17/08 11:36 PM
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Joined: May 2006
Posts: 1,260
New Mexico
Adobedude
pro stock
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pro stock
Joined: May 2006
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New Mexico
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There's a huge diff in weight between the 46RE and the 727.
I can pick up a 727 all day, but barely move a 46RE...
I just shipped a 46RE, with the 38 lb converter and the plywood box it weighed 301 lbs.
As far as the ET...I'll let you know. I'm just glad to be done with the OD tranny, and that's the primary reason I'm making the change.
2001 Dodge Dakota
408 All Motor
11.27 @ 117.83 mph
2017 NM Mopar Challenge Series Champion.
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Re: Racing with A518 -46RH transmission
[Re: Adobedude]
#56633
04/18/08 08:40 AM
04/18/08 08:40 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
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Posts: 16,123
Grand Haven, MI
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comparing my old 904 to the A500 in my 5th ave, dry w/o torque converter or fluid, I'd guestimate the weight difference at about 70 lbs. weight differential between a 727 and 518 should be about the same. internals aren't drastically different in the front half, and the OD planetary is just another 727 gear cluster. if they were built equally (same converter, both rollerized or non rollerized, both steel or aluminum drum, etc), I'd wager you won't see a significant difference in E/T...MAYBE 1 or 2 tenths. I could see maybe another .1-.5 more maybe going from a 518/727 to a 904, because they are much smaller internally and take about 1/3 the power to spin.
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Racing with A518 -46RH transmission
[Re: Adobedude]
#56634
04/18/08 11:52 AM
04/18/08 11:52 AM
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Joined: Jan 2003
Posts: 75,060
U.S.S.A.
JohnRR
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I Win
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Posts: 75,060
U.S.S.A.
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Quote:
Mainly due to the internals...46RE is a power robber.
We'll see about the 1 second thing, just going by what a few builders have said...Then again, they wanted to sell a tranny.
you must be changing the internals also to lightweight components also ? i have been inside a 47RE and other than the 5 pinion planets its a 727 forward of the OD unit ????
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Re: Racing with A518 -46RH transmission
[Re: slantzilla]
#56637
04/18/08 04:01 PM
04/18/08 04:01 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
Quote:
I was told by SMR transmission that they are seeing up to a second and a half when changing from the A518 to the 727. The guy I talked to said it was because of the extra weight and the extra drag from the overdrive.
That statement right there would cause me to stay far away from that vendor. IF there was that much drag in OD, how would you ever get decent gas mileage out of one? It takes a TON of drag to slow a car down a full second. 
yeah, my BS meter is going off on that statement, BUT, there's no qualifications....I COULD MAYBE see that much improvement if it is a bone stock 518 w/stock converter, with a stock governor that probably forces it to shift ~4500 RPM, vs. a fully rollerized, aluminum drum, (maybe 904 internals) 727 with a good 9" converter....
1976 Spinnaker White Plymouth Duster, /6 A833OD
1986 Silver/Twilight Blue Chrysler 5th Ave HotRod **SOLD!***
2011 Toxic Orange Dodge Charger R/T
2017 Grand Cherokee Overland
2014 Jeep Cherokee Latitude (holy crap, my daughter is driving)
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Re: Racing with A518 -46RH transmission
[Re: patrick]
#56638
04/18/08 04:13 PM
04/18/08 04:13 PM
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Joined: Feb 2004
Posts: 6,257
acworth / N. georgia - south e...
cheapstreetdustr
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Posts: 6,257
acworth / N. georgia - south e...
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i am not validating nor discrediting the statement about et improvement..
only to clearify...internal weight is very different than external weight..
especially the closer you get to the crank shaft.
if the intermal/recipricating parts of a 727 are
70 lbs lighter..then that would be substantial..
dont confuse this with haveing a bag of sakrete in your bed..
its two....totally different issues..
as far as if it decreased a second..?
i have no direct experince..so i wont comment.
cheapst
365" Iron J heads,,3480lbs best 1.39 60ft on SS springs.10.54,124 mph ...6.67 1/8th et.average 60fts 1.46 w/ small cam &.063 no2 pill tagged & insured
[image][/image]
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Re: Racing with A518 -46RH transmission
[Re: Duner]
#56640
04/18/08 10:30 PM
04/18/08 10:30 PM
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Joined: May 2006
Posts: 1,260
New Mexico
Adobedude
pro stock
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pro stock
Joined: May 2006
Posts: 1,260
New Mexico
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Well we're about to find out....
I'll post results.
2001 Dodge Dakota
408 All Motor
11.27 @ 117.83 mph
2017 NM Mopar Challenge Series Champion.
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