Does anyone use gear to gear timing?

e3sean · December 24th, 2007, 04:29 PM

i thought about getting it cause i herd it sounds sweet but figured if i would ask the pros and cons?
is it as reliable as a chain?
is there anything special i need for it? (other than the gears)

Goblin · December 24th, 2007, 04:31 PM

Dont waste your time. Gears transfor alot of harmonics to the valvetrain. Stick with the chain.

Darrell · December 24th, 2007, 04:47 PM

No, not many use gear drives. Cheap construction, inaccurate cam timing, bad harmonics are just a few of the cons. There are no pros.

e3sean · December 24th, 2007, 04:49 PM

Originally Posted by Darrell

No, not many use gear drives. Cheap construction, inaccurate cam timing, bad harmonics are just a few of the cons. There are no pros.

nuff said thanks i am glad i asked

JBIGBOOTSY · December 24th, 2007, 05:16 PM

I have been searching on the internets, and I can find no actual proof gear drives hurt performance. would the hyd. lifters absorb gear drive harmonics? The harmonics spoken of would negatively affect the valve springs? I am curious about this if anyone has some info please help.

e3sean · December 24th, 2007, 05:25 PM

i googled a few forums where ppl had the same question and there were alot of negitive responses from ppl who said they had them.. and a few ppl said it set off their knock sensors.. ill stick to the chain since i already have it.

Darrell · December 24th, 2007, 05:34 PM

Originally Posted by JBIGBOOTSY

I have been searching on the internets, and I can find no actual proof gear drives hurt performance. would the hyd. lifters absorb gear drive harmonics? The harmonics spoken of would negatively affect the valve springs? I am curious about this if anyone has some info please help.

Search harder.

No, hydraulic lifters won't absorb the harmonics.

Install a gear drive sometime and you will see how bad the slop is between the idler gears and the cam/crank gear. Gear drives are bad news.

JBIGBOOTSY · December 24th, 2007, 10:41 PM

I'm not saying they are sliced bread, I was just looking for some data.

78mach1 · December 25th, 2007, 12:14 AM

ya i dont like them much anymore, everyone says it sounds like a supercharger, but if my car is going to sound super charged,........IT BETTER BE SUPERCHARGED!

i had a pete jackson for a while, i didnt like the constant wineing

i think the only con is really accurate timing, but i dont know if thats the truth or something i just heard

e3sean · December 25th, 2007, 02:52 AM

Originally Posted by 78mach1

i think the only con is really accurate timing, but i dont know if thats the truth or something i just heard

wouldnt really accurate timing be a pro not a con???

78mach1 · December 26th, 2007, 10:57 PM

Originally Posted by e3sean

wouldnt really accurate timing be a pro not a con???

oh haha ya.....sorry i was really tired

Stangzilla · December 26th, 2007, 11:31 PM

Originally Posted by 78mach1

ya i dont like them much anymore, everyone says it sounds like a supercharger, but if my car is going to sound super charged,........IT BETTER BE SUPERCHARGED!

i had a pete jackson for a while, i didnt like the constant wineing

i think the only con is really accurate timing, but i dont know if thats the truth or something i just heard

How could the timing be accurate if Darrell said there is excessive slop between gears?

Stangzilla · December 26th, 2007, 11:33 PM

Originally Posted by 78mach1

ya i dont like them much anymore, everyone says it sounds like a supercharger, but if my car is going to sound super charged,........IT BETTER BE SUPERCHARGED!

i had a pete jackson for a while, i didnt like the constant wineing

i think the only con is really accurate timing, but i dont know if thats the truth or something i just heard

Its something you herd...

woody1 · December 26th, 2007, 11:39 PM

ask yourself why grumpy jenkins used nylon cam gears in his pro stock motors, then you will have your answer

Stangzilla · December 26th, 2007, 11:57 PM

Originally Posted by woody1

ask yourself why grumpy jenkins used nylon cam gears in his pro stock motors, then you will have your answer

Yeah you are right but those were prob custom precision cut gears. The ones that are readily available are not as precise.. I have only myself had seen 2 sets on friends cars over the years and i can remember them taking them off after like 3 months tops..

Stangzilla · December 26th, 2007, 11:59 PM

he said Grumpy Jenkins.. Smokey Yunick,Hambone Reed.. Where do they get the names from....?

woody1 · December 27th, 2007, 12:57 AM

Originally Posted by Stangzilla

Yeah you are right but those were prob custom precision cut gears. The ones that are readily available are not as precise.. I have only myself had seen 2 sets on friends cars over the years and i can remember them taking them off after like 3 months tops..

unfortunately I was not saying he used a gear drive/dogbone setup, he used a run of the mill timing chain setup with nylon cam gear for precise cam timing and harmonic dampening

Stangzilla · December 27th, 2007, 12:58 AM

Originally Posted by woody1

unfortunately I was not saying he used a gear drive/dogbone setup, he used a run of the mill timing chain setup with nylon cam gear for precise cam timing and harmonic dampening

Shows how much I know about about timing gears or care about..lol
How bout those freekin names though?!!!!

Darrell · December 27th, 2007, 07:53 AM

Originally Posted by woody1

unfortunately I was not saying he used a gear drive/dogbone setup, he used a run of the mill timing chain setup with nylon cam gear for precise cam timing and harmonic dampening

I don't remember if that was Grumpy Jenkins or one of the other big name engine builders but I remember one of them saying at high rpm they picked up a few horsepower because the nylon would actually compress enough to retard cam timing.

Goblin · December 27th, 2007, 12:48 PM

Originally Posted by Stangzilla

Shows how much I know about about timing gears or care about..lol
How bout those freekin names though?!!!!

These names are guys that have done the dirty work, so guys like us can enjoy the fruits of their labor and R&D. Smokey Yunick was caught up in NASCAR in the mid-late 60s. Bill "Grumpy" Jenkins ran prostock in the late 60s, early 70s.. and after, and was a small-block chevy genious. Guys like Buddy Morrison, and David Reher (Reher Morrison), Bill Kuhlman.. Gene Fultan, Jon Kasse... Ed Pink.. all these guys have built amazing engines, and have been involved with NASCAR, NHRA, IHRA... and lots of other racing associations. These guys started it all. Where do i get these names. Well.. my dad was around when these guys were kings. And history books. Plus, alot of them are still around today, still building SERIOUSLY badass engines.

December 24th, 2007, 04:29 PM	#1
e3sean MM Fanatic 1988 lx 5.7 11.6@109 Join Date: Nov 2007 Location: arizona Posts: 3,577	Does anyone use gear to gear timing? i thought about getting it cause i herd it sounds sweet but figured if i would ask the pros and cons? is it as reliable as a chain? is there anything special i need for it? (other than the gears)

December 24th, 2007, 04:31 PM	#2
Goblin Hardcore Enthusiast Secret In The Works Join Date: Apr 2007 Location: Relocated Back To Tucson, Arizona Posts: 2,038	Dont waste your time. Gears transfor alot of harmonics to the valvetrain. Stick with the chain. __________________ Definition of Fast? I'd say thats good enough. NMRA Outlaw 10.5 Season Opener 2008 Photo courtesy of - Yours Truly

December 24th, 2007, 04:47 PM	#3
Darrell Asshole™ 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: Fond du Lac, Wisconsin Posts: 7,770	No, not many use gear drives. Cheap construction, inaccurate cam timing, bad harmonics are just a few of the cons. There are no pros. __________________ Racing in memory of Dave Bandt 11/19/69 - 3/23/08 "he's traded his wheels for wings" Professor of Natural Aspiration Thanks to: Artie at Trick Flow, Dave at Team Z Motorsports, Brian at Total Engine Airflow and Harold at Furo Racecraft

December 26th, 2007, 11:59 PM	#16
Stangzilla MM Fanatic Join Date: Aug 2006 Location: On my way to Baines's house!! Posts: 3,095	he said Grumpy Jenkins.. Smokey Yunick,Hambone Reed.. Where do they get the names from....? __________________ Rotating The Earth 1320 Feet At A Time!! The very existence of flamethrowers proves that sometime, somewhere, someone said to themselves, “You know, I want to set those people over there on fire, but I’m just not close enough to get the job done.”

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December 24th, 2007, 05:16 PM	#5
JBIGBOOTSY Hardcore Enthusiast 1990 LX hatch Join Date: Aug 2006 Location: Hobart Indiana Posts: 2,065	I have been searching on the internets, and I can find no actual proof gear drives hurt performance. would the hyd. lifters absorb gear drive harmonics? The harmonics spoken of would negatively affect the valve springs? I am curious about this if anyone has some info please help.

December 24th, 2007, 05:25 PM	#6
e3sean MM Fanatic 1988 lx 5.7 11.6@109 Join Date: Nov 2007 Location: arizona Posts: 3,577	i googled a few forums where ppl had the same question and there were alot of negitive responses from ppl who said they had them.. and a few ppl said it set off their knock sensors.. ill stick to the chain since i already have it.

December 24th, 2007, 10:41 PM	#8
JBIGBOOTSY Hardcore Enthusiast 1990 LX hatch Join Date: Aug 2006 Location: Hobart Indiana Posts: 2,065	I'm not saying they are sliced bread, I was just looking for some data.

December 26th, 2007, 11:39 PM	#14
woody1 Enthusiast Join Date: Nov 2006 Posts: 558	ask yourself why grumpy jenkins used nylon cam gears in his pro stock motors, then you will have your answer

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