Speedmaster 1.6 rockers

[qkcuda]

I just purchased a set of Edelbrock E-Street heads for my 400. I have been considering buying 1.6 rockers, similar to the stainless steel ones Speedmaster sells.
For reference I have a Summit 6400 cam, which is broken in and has great street manners. The rockers would increase lift from 444/466 to 475/500 which would take better advantage of the head flow.
Does anyone have any experience with these or similar? Since they take ball/ ball pushrods, can you reuse the stock pushrods?

 

[pnora]

I just purchased a set of Edelbrock E-Street heads for my 400. I have been considering buying 1.6 rockers, similar to the stainless steel ones Speedmaster sells.
For reference I have a Summit 6400 cam, which is broken in and has great street manners. The rockers would increase lift from 444/466 to 475/500 which would take better advantage of the head flow.
Does anyone have any experience with these or similar? Since they take ball/ ball pushrods, can you reuse the stock pushrods?

No experience. Only advice I will give is have the springs checked and make sure they are correct for your application. Push rods should be measured and ordered again to fit your application. I doubt the stock rods will be correct.

 

[gtxrt]

am using the 440 source 1.6 adjustable on my RT stock type push rods. I like them. am using the stock lenght push rods.

 

[qkcuda]

No experience. Only advice I will give is have the springs checked and make sure they are correct for your application. Push rods should be measured and ordered again to fit your application. I doubt the stock rods will be correct.

I am currently running factory replacement HP valve springs, since the cam has similar specs to the Roadrunner cam. The new heads say they have single springs with a damper good for up to .600 lift, so I don't think springs will be an issue.

 

[qkcuda]

am using the 440 source 1.6 adjustable on my RT stock type push rods. I like them. am using the stock lenght push rods.

Thanks for confirming.

 

[70rrclone]

I bought a set of speedmaster 1.5 stainless steel rockers on black friday. They arrived yesterday. The oil holes in the rocker shafts are miss drilled. Here's a pic of the speed master shaft next to a mancini branded Harland Sharp shaft. I haven't been able to get ahold of speedmaster yet. Hopefully they will make it right.

 

[1KoolBee]

I tried those once. Siezed on shaft, tagged a valve. Never again. Harland sharp eddy style rockers from here on out. Cheaper in the long run and probably the only off the shelf rockers with correct geometry for Edelbrock/Stealth/Trick Flow style heads.

 

[ckessel]

Check into RAU[ Rocker Arms Unlimited]. Priced similar to HS. Bushed Stainless with roller tips. Made in the US. Only have 1.6's though.
https://www.rockerarms.com/pdf/pl440flyer.pdf

 

[qkcuda]

Nice looking pieces, but over my budget for sure.

 

[gtxrt]

found the box mine were prw rockers

 

[PRHeads]

You guys are pretty fussy.
I mean sh!t……the holes are within an inch or where they should be!

 

[eldubb440]

the above doesn't instill a lot of confidence

 

[gtxrt]

do the holes have to be in an exact location to oil properly ?

 

[PRHeads]

I know I wouldn’t be volunteering to be the Guinea pig for that experiment.

 

[Curiousyellow71]

The cheap stainless rockers I've heard of issues w the pin sliding out of the roller.
I would avoid anything made by Speedmaster, not worth it. Never any engineering...only the cheapest copy they can offer.

 

[qkcuda]

found the box mine were prw rockers

Are PRW's better quality? They look similar.

 

[qkcuda]

I know I wouldn’t be volunteering to be the Guinea pig for that experiment.

Speaking of experiments, do you think there is any advantage with 1.6's given the mild cam? I don't need to spend extra money on top of the heads if I won't see any gains.

 

[33 IMP]

Speaking of experiments, do you think there is any advantage with 1.6's given the mild cam? I don't need to spend extra money on top of the heads if I won't see any gains.

My opinion only:
The gains you might see won't be a good return on investment.
And shafts look like they might be drilled for the offset rockers used with SM's Victor clone heads. Or maybe not. Either way, they're wrong.

 

[gtxrt]

Are PRW's better quality? They look similar.

am not sure mine are still running good.

 

[33 IMP]

I'd call Mike at B3 Racing, the rocker arm geometry correction guru, and ask what he would recommend. Could ask about pushrod lengths at the same time.
I think I'd be tempted to use the Mancini version of Harland Sharp's, the ones without the needle bearings.