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Old 07-13-2011, 02:43 AM   #1
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quick roller rocker question?

Which is better aluminum or stainless? Do I need to get anything besides the RR's to use them with my gt40p heads?
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Old 07-13-2011, 09:46 AM   #2
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Re: quick roller rocker question?

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Which is better aluminum or stainless? Do I need to get anything besides the RR's to use them with my gt40p heads?
The stainless are probably stronger, but unless you are going to rev it to the moon and use super strong valve springs the aluminum will work fine.

Make sure you have the correct studs and locking nuts.
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Old 07-13-2011, 06:09 PM   #3
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Yea it comes in a kit bolts and rockers, cool thanks for the help
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Old 07-13-2011, 07:07 PM   #4
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Re: quick roller rocker question?

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Yea it comes in a kit bolts and rockers, cool thanks for the help
You are welcome.
Let us know if you need anything else and we'll do our best to help.
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Old 07-16-2011, 12:35 AM   #5
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What's the diff between stud mount and pedestal mount and which do I need for gt40p heads?
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Old 07-16-2011, 07:39 AM   #6
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Re: quick roller rocker question?

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What's the diff between stud mount and pedestal mount and which do I need for gt40p heads?
Stud mount uses a stud to hold the rockers in place and pedestal mount uses a pedestal and a bolt. Details

Without seeing the heads/valve train I'm not 100% sure, but I think the GT 40P heads are most likely pedestal mount.

PEDESTAL MOUNT ----------------------------------- STUD MOUNT
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Old 07-16-2011, 01:18 PM   #7
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Yep defiantly pedestal mount thanks alot
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Old 07-16-2011, 01:21 PM   #8
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Re: quick roller rocker question?

You're Welcome!
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Old 07-17-2011, 08:49 AM   #9
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Re: quick roller rocker question?

also, make sure you use 1.6rr on those gt40 series heads. 1.7's are too big.
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Old 07-17-2011, 02:04 PM   #10
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Re: quick roller rocker question?

why are 1.7's to big bro ?? I had them on GT40P heads before , they increase your cam lift just a little and are worth a SOLID 10 to 12 HP , THEY AREN'T PHYSICALLY ANY BIGGER
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Old 07-17-2011, 03:31 PM   #11
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Re: quick roller rocker question?

Rocker Arm Notes from Ford Performance:



NOTES:
1- The M-6564-B351 and -A50 (1.70) bolt-on Roller Rocker Arms will not clear the stamped rocker cover on standard 5.0L EFI engines. “Taller” valve covers, such as the production 5.0L EFI HO die-cast aluminum cover or Ford Racing Chrome Cover M-6582-D302 can be used if the baffle is modified in the RH cover. The M-6582-E302 polished aluminum Valve Cover will clear all rocker arms and stud girdles, but will not fit under the EFI manifold unless a 1" Spacer M-9486-A53 is used between the upper and lower sections of the intake. M-6582-E302 will not fit 1994-1995 Mustang or 1990-1993 T-Bird.2- Rocker channels not included.

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Old 07-17-2011, 04:12 PM   #12
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Re: quick roller rocker question?

YES I Know that, but I'm assuming he's running a stock cam .........
I used those heads ,with an E303 cam and stock pistons with the 1.7 rockers with NO PROBLEMS .............
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Old 07-17-2011, 04:45 PM   #13
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Re: quick roller rocker question?

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YES I Know that, but I'm assuming he's running a stock cam .........
I used those heads ,with an E303 cam and stock pistons with the 1.7 rockers with NO PROBLEMS .............
You are correct.
It is the F,X & Z cams that require checking.
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Old 07-17-2011, 05:06 PM   #14
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Re: quick roller rocker question?

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YES I Know that, but I'm assuming he's running a stock cam .........
I used those heads ,with an E303 cam and stock pistons with the 1.7 rockers with NO PROBLEMS .............
dude, are you sure you were using 1.7rr with an e-cam and gt40p heads.

that's like .529 lift in a .510 lift area.

if you did, your awsome. the last time i tried that combo the piston and the valve become one on more than one piston.
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Old 07-17-2011, 05:07 PM   #15
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Re: quick roller rocker question?

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YES I Know that, but I'm assuming he's running a stock cam .........
I used those heads ,with an E303 cam and stock pistons with the 1.7 rockers with NO PROBLEMS .............
and yes, i was refering to an "e-cam" with those 1.7rr. sorry i wasnt more clear
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Old 07-17-2011, 05:31 PM   #16
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Re: quick roller rocker question?

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dude, are you sure you were using 1.7rr with an e-cam and gt40p heads.

that's like .529 lift in a .510 lift area.

if you did, your awsome. the last time i tried that combo the piston and the valve become one on more than one piston.
There you go, one person gets away with it and one does not.
That shows how close the tolerances are.
I'd bet a small difference in gasket thickness, heads or block being shaved a bit, valve float or possibly just manufacturing tolerances caused it to happen.

No, you don't have to check, but sometimes it sure pays off if you do.
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Old 07-18-2011, 09:06 AM   #17
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Re: quick roller rocker question?

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dude, are you sure you were using 1.7rr with an e-cam and gt40p heads.

that's like .529 lift in a .510 lift area.

if you did, your awsome. the last time i tried that combo the piston and the valve become one on more than one piston.
ABSO FREAKIN' LUTELY !!!!!!
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Old 07-18-2011, 09:08 AM   #18
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Re: quick roller rocker question?

I DID clay up my pistons and check vlave clearance though ,,,, i didnt just wing it
i think the e cam was .498 lift ??? and using 1.7 's adds what .10 lift ?? i'M NOT POSITIVE ON THE SPECS THOUGH ,ITS been awhile .............
and i was using a stock 93 Cobra short block ,also not sure if the pistons on that are the same as a GT ???
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Old 07-18-2011, 09:44 AM   #19
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Re: quick roller rocker question?

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I DID clay up my pistons and check vlave clearance though ,,,, i didnt just wing it
i think the e cam was .498 lift ??? and using 1.7 's adds what .10 lift ?? i'M NOT POSITIVE ON THE SPECS THOUGH ,ITS been awhile .............
and i was using a stock 93 Cobra short block ,also not sure if the pistons on that are the same as a GT ???
1.7rr with .498 = .529 lift
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Old 07-18-2011, 09:58 AM   #20
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Re: quick roller rocker question?

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There you go, one person gets away with it and one does not.
That shows how close the tolerances are.
I'd bet a small difference in gasket thickness, heads or block being shaved a bit, valve float or possibly just manufacturing tolerances caused it to happen.

No, you don't have to check, but sometimes it sure pays off if you do.
there's no tell'n. it wasnt valve float... i got comp .560 springs. it was catostrophic though... pop'd a hole in one of the cumbustion chambers, bent the edges of several valves, poked a hole in a piston, re-arranged the valve reliefs in another piston, bent several pushrods (@$100.00 a set).

the only thing i was able to save was the 1.7rr, the intake, the crank and block.... the rest was just a high dollar paper weight.
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Old 07-18-2011, 10:54 AM   #21
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Re: quick roller rocker question?

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there's no tell'n. it wasnt valve float... i got comp .560 springs. it was catostrophic though... pop'd a hole in one of the cumbustion chambers, bent the edges of several valves, poked a hole in a piston, re-arranged the valve reliefs in another piston, bent several pushrods (@$100.00 a set).

the only thing i was able to save was the 1.7rr, the intake, the crank and block.... the rest was just a high dollar paper weight.
Man, that's terrible.
That would make me cry after all the effort of building it.
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Old 07-18-2011, 11:29 AM   #22
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Re: quick roller rocker question?

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Man, that's terrible.
That would make me cry after all the effort of building it.
i spent a lil over a week putting it together... let it idle in the garage for 10min. backed it out of the garage, let it idle another 10min. everything was fine, didnt give it any gas, just let it idle. i reved it up to 2500rpm, and i guesse that's when the lifters pumped up, ....and bang!!! ding- ding-ding-ding-ding more dinging, then i shut it off... and pushed it back into the garage. never even got to drive it.
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Old 07-18-2011, 11:43 AM   #23
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Re: quick roller rocker question?

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i spent a lil over a week putting it together... let it idle in the garage for 10min. backed it out of the garage, let it idle another 10min. everything was fine, didnt give it any gas, just let it idle. i reved it up to 2500rpm, and i guesse that's when the lifters pumped up, ....and bang!!! ding- ding-ding-ding-ding more dinging, then i shut it off... and pushed it back into the garage. never even got to drive it.
That hurts!

I built a 429/435 CI years ago. Put it in and started it up. Sounded fine with open headers. Took it to the exhaust shop to get exhaust put on. When I went to pick it up the tech told me that it was knocking. Fired it up and sure enough it was. I felt sick to my stomache, over $4K invested and it knocked! Tore it down and found that one of the .030 over pistons was not .030 over, it was standard size even though it was marked .030. I didn't notice it when assembling because the machinist was supposed to set each piston up in its own hole at a specified clearance. Thinking this had been done, I didn't check it myself and just put it together. Big mistake, lesson learned.
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Old 07-18-2011, 11:46 AM   #24
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Re: quick roller rocker question?

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That hurts!

I built a 429/435 CI years ago. Put it in and started it up. Sounded fine with open headers. Took it to the exhaust shop to get exhaust put on. When I went to pick it up the tech told me that it was knocking. Fired it up and sure enough it was. I felt sick to my stomache, over $4K invested and it knocked! Tore it down and found that one of the .030 over pistons was not .030 over, it was standard size even though it was marked .030. I didn't notice it when assembling because the machinist was supposed to set each piston up in its own hole at a specified clearance. Thinking this had been done, I didn't check it myself and just put it together. Big mistake, lesson learned.
did it fuk up the cylinder wall real bad? were u able to stick in a .30 piston or did u have to start from scratch and go .40 on all of them?
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Old 07-18-2011, 11:53 AM   #25
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Re: quick roller rocker question?

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did it fuk up the cylinder wall real bad? were u able to stick in a .30 piston or did u have to start from scratch and go .40 on all of them?
No, luckily the exhaust shop was just a short drive from where I lived and it didn't hurt anything. I replaced the piston and rings and it was good to go.
The piston company (TRW) stood behind the piston and gave me a whole $100 to tear it down and rebuild it. Better than nothing I guess.

Engine ran great after that. It was in a 1969 F100 with a C6 auto. It would leave about 15 feet of rubber on the pavement when it shifted from 2-3 at 90 mph.
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Old 07-18-2011, 11:56 AM   #26
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Damm just reading all this about yalls cars sucks, I bet a e cam with 1.7s will flow
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Old 07-18-2011, 12:20 PM   #27
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Re: quick roller rocker question?

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Damm just reading all this about yalls cars sucks, I bet a e cam with 1.7s will flow
its good for a blower combo, cause of the duration. i still currently use the combo but with e7 heads and 11psi of boost.

its good for 420-480 rwhp depending on intake and heads.

in my opinion it depends on the dyno..lol. but 450rwhp with 11-13psi is average with that set-up
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Old 07-18-2011, 09:30 PM   #28
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So just to be absolutely clear. 1.7 rr's will NOT work with the ford racing e-cam?
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Old 07-18-2011, 10:06 PM   #29
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How close the tolerances are im not taking a chance I don't need to destroy my engine ill stick with the 1.6s thanks for all the info guys
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Old 07-19-2011, 04:49 AM   #30
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Are aftermarket roller rockers really necessary when installing an e303?
Or will the stock 1.6 work?
Advantages to buying new aftermarket vs old, stock?
This is all assuming your buying new lifters and springs that ARE aftermarket.
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Old 07-19-2011, 08:36 AM   #31
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Quote:
Originally Posted by wc3john
Are aftermarket roller rockers really necessary when installing an e303?
Or will the stock 1.6 work?
Advantages to buying new aftermarket vs old, stock?
This is all assuming your buying new lifters and springs that ARE aftermarket.
1.6 are fine with a e cam
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Old 07-19-2011, 09:34 AM   #32
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Re: quick roller rocker question?

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Are aftermarket roller rockers really necessary when installing an e303?
Or will the stock 1.6 work?
Advantages to buying new aftermarket vs old, stock?
This is all assuming your buying new lifters and springs that ARE aftermarket.
The stock rockers will work.
Roller rockers will free up a bit of HP by reducing friction in the valvetrain.
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Old 07-19-2011, 11:53 AM   #33
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Re: quick roller rocker question?

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So just to be absolutely clear. 1.7 rr's will NOT work with the ford racing e-cam?
u can use 1.7rr with an e-cam... i currently am myself. i just dont recommend that combo w/ gt40p heads.

the cumbustion chamber is smaller on the gt40 heads so u cant get as aggressive cam lifts as u can with stock e7's.


rr's...

the advantage of aluminum is less weight of course.... and supposedly you free up around 15hp (im sure that is spread out across the rpm range).


i used to have a set of 1.65 stamped steel roller tip rocker arms (not a typo)... and i didnt really notice a difference over oem 1.60 stamped steel.

when i installed my aluminum 1.7 full roller rocker.. i noticed a difference as soon as i hit the throttle. no dought, it reved consideralby faster, and the exhaust had a slightly different tone. it was definatley one of the most noticable power mods ive made.

the down side to aftermarket roller rocker arms.......

sometimes they can clatter. some are loud.... some are not, or make no noise at all. ive heard differnt brands clatter so i cant recommend any particular one. my friend took the 1.6rr off of his and put back on the stock cause of the clatter. i use 50wt racing oil so mine dont make much noise.
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Old 07-19-2011, 12:16 PM   #34
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Re: quick roller rocker question?

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the down side to aftermarket roller rocker arms.......

sometimes they can clatter. some are loud.... some are not, or make no noise at all. ive heard differnt brands clatter so i cant recommend any particular one. my friend took the 1.6rr off of his and put back on the stock cause of the clatter. i use 50wt racing oil so mine dont make much noise.
Properly adjusted and with good lifters and pushrods they should not clatter. If they do then you have a loose pushrod seat, roller tip or the needle bearings are bad.
Roller rockers are like everything else you buy. If you buy cheap ones then they won't last and/or are likely to give you troubles like described.

50 Weight Racing Oil is awfully thick.
There is additional power to be had by running thinner oils.
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Old 07-19-2011, 12:31 PM   #35
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Re: quick roller rocker question?

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Originally Posted by Trojan Horse View Post
Properly adjusted and with good lifters and pushrods they should not clatter. If they do then you have a loose pushrod seat, roller tip or the needle bearings are bad.
Roller rockers are like everything else you buy. If you buy cheap ones then they won't last and/or are likely to give you troubles like described.

50 Weight Racing Oil is awfully thick.
There is additional power to be had by running thinner oils.
i run hard with boost... it gets hot n there. i prefer viscosity than 5-6 more horse power..

rr...
that is semi true on stud mounted... but not 100% true on pedestal mount, which is wut he would be running. you tighten them down to zero lash, and it's pretty much gonna do wutever it does. not to mention, u see a few companies like scorpian that advertise how quite their rocker arms are... which means u dont have to buy a cheap set for them to clatter....
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