70 dart 470 ci drag car build.

-
Newbomb Turk said:
Damn right. I can run tighter piston to valve clearance than a belt and much tighter than a chain.

Until I see some sign of “harmonics” transfer from the gear drive I’ll keep using them.

Here’s a fun one for the books.

I was watching a video of some dude at Reher-Morrison assembling a BBC.

When he got to timing the cam, he blows the belt drive so hard…use your imagination.

Then, then the dude says “besides the nasty harmonics the gear drives cause, the idler gear forces the cam gear UP and INTO the top of the cam bearings”!

I said WTF? That makes zero sense.

Being the prick I am, and knowing I don’t know everything I pick up the phone and call RM.

I get a dude on the phone and I ask him about the harmonics. He says oh yeah, we’ve tested them when engines come in with them and they make (insert some absurd hp gain) more on the belt drive every time.

So I say on bracket engines? He says we’ve tested them on everything but a Pro Stock engine.

Surely they’d have some actual dyno sheets to prove it. You’d think they’d keep copies so when morons like me call they could shut us up.

I ask for dyno sheets. He says we don’t keep stuff like that! Got it.

Then he says “you know, if you search the web you’ll find tons of testing done on all the gear drives.

I say I’ve looked and the ONLY tests I’ve found are chains and belts against dual idler GD’s. So how about you google it up right quick and send me a link.

He actually starts looking. 10 minutes later he says I can’t find anything but the dual idler stuff. But it’s in SAE papers and everyone know that.

Short story is neither that dude or anyone else has shown me an SAE paper or any other technical paper has ever been produced to prove the claim.

Then told him what the dude said about the idler gear forcing the cam up into the the top of the cam bearing.

He says oh yeah, we’ve seen that too.

So I ask him were these flat tappet engines that had it happen. He says oh hell no. We don’t build those ever.

So I said how the hell does the gear drive have enough force to overcome the downward pressure of valve springs that probably have no less that 320 on the seat and 850 over the nose as that’s a lot of load.

His answer was I don’t know how it works but I know it happens.

This jack *** had zero proof of either claim yet he pumps out that bullshit like it’s fact.

I’m open to reading or even buying ANY study from SAE, NACA or any other competent testing that proves the harmonics claims.

Yet I never get them. I called out a guy on speedtalk about it and he posted a link to (IIRC) a test by Roush that used a dual idler gear drive but not a three gear fixed idler drive.

The other claim the RM dude made about the gear forcing the cam up is so farcical I’d believe the cow jumped over the moon and the dish corn holed the spoon before I bought that ****.

Now that I’m on full prick I’ll also say that as smart as David Reher is he is one arrogant dude.

I watched him at a seminar (I saw it on the web but, not live) and when he was asked about rod length he said it doesn’t matter and then he said Smokey was wrong about using the longest rod that fits and that he didn’t know what he didn’t know.

If Reher was correct in that he would NEVER build an engine where the oil ring goes around the wrist pin. EVER.

He could easily make the rod .100 or even .200 shorter and not do it. But he does.

And he’s doing exactly what Smokey said to do back in ‘78 or whatever year it was he wrote the book.

For him to even privately make that claim while doing exactly what he says doesn’t matter is hypocritical.

Making a public statement like that is beyond arrogant.

So I stand by the gear drive as the most effective, cheapest way to drive a cam there is. And the most accurate.

It’s only drawback is you can’t change cam timing on the dyno nearly as fast as a belt drive. Other than that the GD wins hands down.
Click to expand...
Damn that's about the length of a short AJ post
 
MOPARMAGA said:
Damn that's about the length of a short AJ post
Click to expand...


Yeah, the GD thing just pisses me off me off.

Guys run chains because they think the GD will make noise and generate harmonics but there is zero proof of it.

In fact, in a thread on yellow bullet Chris Uratchco, who is no poser BTW talked about how inaccurate a BELT DRIVE really is.

The only reason PS doesn’t use them is it takes longer to degree a GD than a belt and it’s harder to change cam timing on the dyno using a GD than a belt.
 
Newbomb Turk said:
Yeah, the GD thing just pisses me off me off.

Guys run chains because they think the GD will make noise and generate harmonics but there is zero proof of it.

In fact, in a thread on yellow bullet Chris Uratchco, who is no poser BTW talked about how inaccurate a BELT DRIVE really is.

The only reason PS doesn’t use them is it takes longer to degree a GD than a belt and it’s harder to change cam timing on the dyno using a GD than a belt.
Click to expand...
Harmonics could come from 4 gear gds
 
MOPARMAGA said:
Harmonics could come from 4 gear gds
Click to expand...

There are harmonics from the crank and cam.

The argument is the GD transmits the harmonics to the crank where the belt absorbs them. I say if that’s the case (where’s the proof) then how does the damper on the crank not absorb them like they do for the crank.

The red is zero proof that happens.

And the fact is every World of Outlaw car they use a gear drive AND they don’t use a damper on the crank. At least they didn’t the last time I looked at them, which was the early 2000’s.

And you don’t see the cranks braking and shitting the engine all over the track.

If that was the case then you’d see belt drives on them. And…that don’t happen.

I hate being ignorant so I educate myself as best I can.

I have very little tolerance for people who are willingly ignorant just because they want to be.
 
Newbomb Turk said:
There are harmonics from the crank and cam.

The argument is the GD transmits the harmonics to the crank where the belt absorbs them. I say if that’s the case (where’s the proof) then how does the damper on the crank not absorb them like they do for the crank.

The red is zero proof that happens.

And the fact is every World of Outlaw car they use a gear drive AND they don’t use a damper on the crank. At least they didn’t the last time I looked at them, which was the early 2000’s.

And you don’t see the cranks braking and shitting the engine all over the track.

If that was the case then you’d see belt drives on them. And…that don’t happen.

I hate being ignorant so I educate myself as best I can.

I have very little tolerance for people who are willingly ignorant just because they want to be.
Click to expand...
I honestly never heard anything bad about gear drive except some whimpers of noise....who cares, not me.
I honestly haven't done much investigating of boohoos.
 
I really want to try a gear drive. I am not scared of them. I keep checking the couch cushions for lost pocket change but it is not adding up fast enough.

Top Fuel uses gear drives. Alcohol funny cars and dragsters use gear drives. Noonan uses gear drives. Proline uses gear drives. And if that is not enough, Steve Morris uses gears drives on his SMX engines that are seeing lots of road miles in the drag and drive events. Seems to be well tested and working pretty good for all those applications.
 
MOPARMAGA said:
Damn that's about the length of a short AJ post
Click to expand...
Yea, I was wondering if he types that **** out or if he blabbers into a phone. lol
He could blame some things that hurt feelers on voice command, Damn voice command did it again, sorry. lol
 
fishmens67 said:
Yea, I was wondering if he types that **** out or if he blabbers into a phone. lol
He could blame some things that hurt feelers on voice command, Damn voice command did it again, sorry. lol
Click to expand...


lol I should say the talk and type screws me.

You know when I make long posts two things are true.

1. My hands aren’t hurting like a ****.

2. I’m not on my phone. If I have to type on my phone I keep it real short.

3. I’m trying to over take AJ for the longest posts on the forum. The difference is he will always hold the record for longest posts full of horse crap.

Please note: I failed math. Multiple times.
 
Newbomb Turk said:
lol I should say the talk and type screws me.

You know when I make long posts two things are true.

1. My hands aren’t hurting like a ****.

2. I’m not on my phone. If I have to type on my phone I keep it real short.

3. I’m trying to over take AJ for the longest posts on the forum. The difference is he will always hold the record for longest posts full of horse crap.

Please note: I failed math. Multiple times.
Click to expand...
LOl.
 
I type on my puter, if I used voice command on the phone I wouldn't be around long, I can be pretty foul. lol
 
Bobzilla said:
I really want to try a gear drive. I am not scared of them. I keep checking the couch cushions for lost pocket change but it is not adding up fast enough.

Top Fuel uses gear drives. Alcohol funny cars and dragsters use gear drives. Noonan uses gear drives. Proline uses gear drives. And if that is not enough, Steve Morris uses gears drives on his SMX engines that are seeing lots of road miles in the drag and drive events. Seems to be well tested and working pretty good for all those applications.
Click to expand...
Yep, all good points.
 
Bobzilla said:
I really want to try a gear drive. I am not scared of them. I keep checking the couch cushions for lost pocket change but it is not adding up fast enough.

Top Fuel uses gear drives. Alcohol funny cars and dragsters use gear drives. Noonan uses gear drives. Proline uses gear drives. And if that is not enough, Steve Morris uses gears drives on his SMX engines that are seeing lots of road miles in the drag and drive events. Seems to be well tested and working pretty good for all those applications.
Click to expand...

MOPARMAGA has an excellent plan to earn money for his gear drive.

Maybe he can share it so you can do it and have extra cash for a gear drive.

I love his plan but I don’t want to steal his thunder so he can explain it himself.
 
Newbomb Turk said:
MOPARMAGA has an excellent plan to earn money for his gear drive.

Maybe he can share it so you can do it and have extra cash for a gear drive.

I love his plan but I don’t want to steal his thunder so he can explain it himself.
Click to expand...
Apparently I'm going to be a male stripper for bachelorette (BACHELORETTE) parties only.
Not identify as a bachelorette just F on birth certificate.
$1200.00 an hour , newbombs gonna take 2%
Good deal in my book lol
 
Nah, we have some dyno results coming and a car going together, some good stuff.
 
MOPARMAGA said:
That's probably going to be the end of this thread lol
Click to expand...


I’m sure there are guys on here who have wives that would pay big money to see you work the pole, dance like a banshee and strip buck naked.

Probably some guys on here too.

Money is money ain’t it??
 
Newbomb Turk said:
I’m sure there are guys on here who have wives that would pay big money to see you work the pole, dance like a banshee and strip buck naked.

Probably some guys on here too.

Money is money ain’t it??
Click to expand...
I have the right to refuse service lol.
I gotta sleep at night too
 
Newbomb Turk said:
Yeah, the GD thing just pisses me off me off.

Guys run chains because they think the GD will make noise and generate harmonics but there is zero proof of it.

In fact, in a thread on yellow bullet Chris Uratchco, who is no poser BTW talked about how inaccurate a BELT DRIVE really is.

The only reason PS doesn’t use them is it takes longer to degree a GD than a belt and it’s harder to change cam timing on the dyno using a GD than a belt.
Click to expand...
If gear drives generated harmful harmonics, then there'd be exploded diesel engines everywhere. There aren't. What about the Ford 300 I6? One of the best engines ever. Gear drive.
 
You must log in or register to reply here.
-

Back
Top