BB Gear Drive??? Milodon, Pete Jackson ect.
#621249
02/22/10 09:26 PM
02/22/10 09:26 PM
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Joined: Aug 2009
Posts: 2,054 Mooresburg, Tn
'72CudaRacer
OP
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OP
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Posts: 2,054
Mooresburg, Tn
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Anyone care to share pro's/con's on gear drives for BB? Compared to a timing chain, are they worth the extra dollars. What about longevity in a race only world? Which one, Pete Jackson or Milodon gear drives or who's timing chain, and why? Thanks, Brian
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Re: BB Gear Drive??? Milodon, Pete Jackson ect.
[Re: '72CudaRacer]
#621254
02/22/10 11:08 PM
02/22/10 11:08 PM
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Joined: Nov 2004
Posts: 3,544 Syracuse,NY
CompWedgeEngines
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master
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Syracuse,NY
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I like the Donovans myself, I'm sure the KBs are fine. Never had a real issue with the Milodons.If you go for a Donovan, it will be their " pro " series now. Very stout pieces.
I dont necessarily subscribe to the notion that gear drives eat up horsepower. The junk ones may.
Stable timing may increase horsepower. That being said, a good quality timing set can do a lot of work in the average race engine. All these things come down to making the proper selection of the correct parts for your application. They all are different.
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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Re: BB Gear Drive??? Milodon, Pete Jackson ect.
[Re: ahy]
#621257
02/23/10 12:05 AM
02/23/10 12:05 AM
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Joined: Jan 2003
Posts: 5,875 communist bloc of new jersey
jamesc
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communist bloc of new jersey
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Quote:
Reading all the posts over time I concluded 1) gear drives are best for medium race RPM engines with really stout cams say up to 7500 RPM 2) At really high RPM a belt drive is better... the gear drives can create/transmit their own harmonics
i've posted this before take it for what it's worth
not saying belt drives aren't good (i have one as well as a milodon) but i wouldn't consider this a "medimum RPM" engine. i'm pretty sure these guys had some insight into race engines and they were OK with a gear drive.
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Re: BB Gear Drive??? Milodon, Pete Jackson ect.
[Re: jamesc]
#621258
02/23/10 12:15 AM
02/23/10 12:15 AM
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Joined: Apr 2006
Posts: 3,675 Akron, Ohio U.S.A.
roadhazard
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I have a Milodon here. Can't speek about the others, KB, Donovan etc. I'm sure they are all good quality. Stay away from a dual idler. Now I probably could tell you about many timing chains. Gear drives, buy it once, set it and forget it. Wear out the motor and put it on your new block. Or just keep buying timing chains.
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Re: BB Gear Drive??? Milodon, Pete Jackson ect.
[Re: roadhazard]
#621259
02/23/10 08:10 AM
02/23/10 08:10 AM
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Joined: Jan 2003
Posts: 21,085 Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,085
Niles , Ohio
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The kid has a PJ in his 413.Been in for ten years and many street and strip miles.No problems ever.Rocky
Chrysler Firepower
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Re: BB Gear Drive??? Milodon, Pete Jackson ect.
[Re: Diablo]
#621260
02/23/10 09:00 AM
02/23/10 09:00 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Romeo MI
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Quote:
Keith black should be on that list and at the top of it!!!
I've been running the same KB gear drive on several engines on... been up to 9600 rpm on my SB. This same unit have been on 3 engines now... also have one on my back up engine... have one for my BB but also have a Aussie belt drive
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Re: BB Gear Drive??? Milodon, Pete Jackson ect.
[Re: MR_P_BODY]
#621261
02/23/10 07:14 PM
02/23/10 07:14 PM
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Joined: Aug 2009
Posts: 2,054 Mooresburg, Tn
'72CudaRacer
OP
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OP
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Joined: Aug 2009
Posts: 2,054
Mooresburg, Tn
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Thanks for the comments guys. One reason I'm thinking gear drive is because it seems that I buy a timing chain & gears, put them on and the're "tight", then next time I check it, its loose. Tired of spending $100 each, and them not lasting very long. Who sells Donovan and/or Keith Black gears and how do they stack up against Milodon price wise? Thanks again, Brian
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Re: BB Gear Drive??? Milodon, Pete Jackson ect.
[Re: '72CudaRacer]
#621262
02/23/10 08:14 PM
02/23/10 08:14 PM
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Joined: Nov 2004
Posts: 3,544 Syracuse,NY
CompWedgeEngines
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master
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Syracuse,NY
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You can buy Donovan and KB direct, expect to pay approx. $300 more for those over the Milodon.
RIP Monte Smith
Your work is a reflection of yourself, autograph it with quality.
WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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Re: BB Gear Drive??? Milodon, Pete Jackson ect.
[Re: CompWedgeEngines]
#621263
02/24/10 03:00 AM
02/24/10 03:00 AM
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Joined: Jan 2003
Posts: 447 lake charles, la
sc4400
mopar
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mopar
Joined: Jan 2003
Posts: 447
lake charles, la
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I love these endless debates that always pop up. The theme is always the same. So here is an alternate view. I have a couple thousand passes on a 25 year old PJ dual idler setup. 451/440-1. 330# seat pressure, 700+ open load, with a hilborn cam drive pump. Shift @ 7300, 7600 peak. I'm going to change the thrust washer while I have it down for the first time in 4 years. I think Frieburg(sp) did a dyno test awhile back on every type of cam drive and found very little difference. Do your own thinking. Trust but verify!! RIP
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Re: BB Gear Drive??? Milodon, Pete Jackson ect.
[Re: sc4400]
#621265
02/25/10 01:51 PM
02/25/10 01:51 PM
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Joined: Jul 2004
Posts: 1,145 Arizona, USA
gsmopar
super stock
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super stock
Joined: Jul 2004
Posts: 1,145
Arizona, USA
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Quote:
I love these endless debates that always pop up. The theme is always the same.
So here is an alternate view. I have a couple thousand passes on a 25 year old PJ dual idler setup. 451/440-1. 330# seat pressure, 700+ open load, with a hilborn cam drive pump. Shift @ 7300, 7600 peak. I'm going to change the thrust washer while I have it down for the first time in 4 years.
I think Frieburg(sp) did a dyno test awhile back on every type of cam drive and found very little difference.
Do your own thinking. Trust but verify!!
RIP
I dig the RRegan quote! +1 for the PJ drive. No issues, been in since... ummm.... 1993-ish. Ran it with a solid roller, hydraulic flat tap, and now an old .590 purple shaft.
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Re: BB Gear Drive??? Milodon, Pete Jackson ect.
[Re: '72CudaRacer]
#621266
02/25/10 03:58 PM
02/25/10 03:58 PM
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Joined: Oct 2005
Posts: 8,911 Ontario, Canada
Stanton
Don't question me!
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Don't question me!
Joined: Oct 2005
Posts: 8,911
Ontario, Canada
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Per Pete Jackson ...
Fiction mixed with fact : Gear drives create harmonics
Fact : Every rotating part that contacts another, or part that is stressed under load in an engine ( crank, cam, valve train, gears, chains etc. ) creates a harmonic ( frequency ) . Some frequency are harmless, a simple matter of unavoidable friction , while other are percussive & concussive, and are capable of creating damage in very short periods of time. Gear drives, chains ( yes chains ) and most valve train components create frequencies which are a simple matter of friction and rendered harmless by simple lubricants (oil). An unbalanced or improperly balanced crank , ( especially if the harmonic balancer is removed ) create the percussive and/or concussive types which can over a period of time ( if severe very short ) cause damage , above and beyond anything considered normal wear . Gear drives absolutely do not create these types of harmonics .
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