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Re: Rocker Ratios. 1.5 or 1.6? [Re: MoparDonny] #1903427
08/31/15 08:21 PM
08/31/15 08:21 PM
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Posts: 126
Oregon
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Jamie McGrath Offline
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Oregon
Originally Posted By MoparDonny
Thanks for the replies. I'm not exactly looking for a bunch more power at this point, this is not my current goal. My goal is to replace the stock rockers with something more stable and durable and just better all around than the 50 year old stamped type. I figure that 1.6's vs 1.5's would give me a bit more lift and duration@.050 without the negative drivability effects of a larger cam. Not looking to spend 2 or 3000 on heads until I'm ready for that. By that time the rest of my valvetrain should be decent stuff.
Don.


I'm with you, a modern rocker is going too feel like a fresh tune up. I also like indestructible, if your going too stick with the stealth head or update too a head that you can swap the same rocker gear over on too. I like the Comp Pro Magnum but they don't offer a 1.6 ratio but they are beefy, I fear aluminum rockers regardless of who makes them...

Re: Rocker Ratios. 1.5 or 1.6? [Re: MoparDonny] #1903447
08/31/15 08:56 PM
08/31/15 08:56 PM
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Ontario, Canada
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Stanton Offline
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Stanton  Offline
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Ontario, Canada
Since when are ported Stealths that expensive ?!?!?

Re: Rocker Ratios. 1.5 or 1.6? [Re: Stanton] #1903467
08/31/15 09:24 PM
08/31/15 09:24 PM
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Jamie McGrath Offline
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Originally Posted By Stanton
Since when are ported Stealths that expensive ?!?!?


There not, but I think he is looking too upgrade too a better head at a later date and is looking too be the $2-3000 range for the heads?

Re: Rocker Ratios. 1.5 or 1.6? [Re: Jamie McGrath] #1903549
08/31/15 11:25 PM
08/31/15 11:25 PM
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ahy Offline
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Originally Posted By Jamie McGrath
Originally Posted By MoparDonny
Thanks for the replies. I'm not exactly looking for a bunch more power at this point, this is not my current goal. My goal is to replace the stock rockers with something more stable and durable and just better all around than the 50 year old stamped type. I figure that 1.6's vs 1.5's would give me a bit more lift and duration@.050 without the negative drivability effects of a larger cam. Not looking to spend 2 or 3000 on heads until I'm ready for that. By that time the rest of my valvetrain should be decent stuff.
Don.


I'm with you, a modern rocker is going too feel like a fresh tune up. I also like indestructible, if your going too stick with the stealth head or update too a head that you can swap the same rocker gear over on too. I like the Comp Pro Magnum but they don't offer a 1.6 ratio but they are beefy, I fear aluminum rockers regardless of who makes them...


Me too. Agree the stamped style is marginal or weak for your application. Run hard, there is decent chance the pushrod will punch a hole in one.

I know you did not ask about rockers... but I think needle bearings on the rocker shaft, if that is what you are considering, is a reliability downgrade. The plain bearing works better and is more reliable at least in a moderate application like yours (and mine). If you really want aluminum, the Hughes would be better. I like steel and run Pro Magnums. The old style pro-magnums are good (bulletproof) up to about .6" lift and corresponding spring pressure. I believe the new ones have a bushing and can take more pressure/lift. My "old style" pro-magnums have 15k miles and track time and no problem at all.

Re: Rocker Ratios. 1.5 or 1.6? [Re: Stanton] #1906460
09/04/15 06:54 PM
09/04/15 06:54 PM
Joined: Nov 2004
Posts: 1,760
Port Alberni, British Columbia
MoparDonny Offline OP
top fuel
MoparDonny  Offline OP
top fuel

Joined: Nov 2004
Posts: 1,760
Port Alberni, British Columbia
Originally Posted By Stanton
Since when are ported Stealths that expensive ?!?!?

I don't recall saying I was interested in ported Stealth's? 😕 just how much do you think a decent set of ported heads are worth? I'm betting $3000 is not that far off for Eddy's or Indy's.
As far as the rocker choice goes, I hear you guys on the needle bearing thing versus bushings! But how often do the needles fail? I ask because I've never had that happen or seen it myself. I've seen roller pins pop out and ball end adjusters grind to nothing!

Re: Rocker Ratios. 1.5 or 1.6? [Re: MoparDonny] #1906462
09/04/15 06:58 PM
09/04/15 06:58 PM
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State of confusion
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Thumperdart Offline
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My 1.5`s actually measured at 1.54 which made the cam about .020 bigger iirc.............


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Rocker Ratios. 1.5 or 1.6? [Re: Thumperdart] #1906781
09/05/15 10:42 AM
09/05/15 10:42 AM
Joined: Jul 2007
Posts: 732
eastern,Ky
70RT Charger Offline
super stock
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eastern,Ky
I've been following this thread for a while and saw your original post that you were going to use the stock rockers and now you may use the 1.6 rockers. My build with my budget is a 440 with stock ly rods with arp bolts, Ross forged pistons, square decked, engle dual hydr cam 232-238 grind 514/532. Elderbrock 84cc heads, dual plane intake, 850 carb. I've been talking to the pros that have done several of these builds and have talked to them about my rocker set up. This build is made to run 1.5 rockers and they tell me unless I have the extra money to blow just run my factory set up that it was a great light weight set up and should never give me any problems and the horsepower gains from their dyno sheet only showed a horsepower gain of up 5hp with roller rockers.I was told to inspect them before I used them. In your case you may see a little more horsepower gain with the 1.6 ratio rocker but as somebody else said I would spend the money somewhere else on your engine until your ready to run the roller rockers and I also plan to run the rollers later down the road when I get the extra money but it's your build so make yourself happy and good luck!

Last edited by 70RT Charger; 09/05/15 10:42 AM.
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