BB Rocker Arms?

hows the saying go: "pay a little now or alot later"

the intake rocker on the -1s are the only ones offset,right?
if thats the case,could I buy just the offset rockers and use the ones i have for the exhaust side?

mike

if he used boost he could have the HP with a pulley change or wastegate twist.
sorry for the interuption.

what rollar cam lift and duration spring presure open and closed


this will determine what rocker to use


my 715/280 rollar took out two H/S rockers


soon I will have cnc 345s and will use jesel setup for them

The Harland Sharps will work just fine, I sell tons of them and have used them for over 20 years. When you get over the approximate 800-850 open pressure, its time for Jesel od T-D. Some of the H/S will go 1000#, but not the Mopars.

You could just re-use your exhaust rockers and buy intakes only.

I am going to run my annual H/S rocker deal starting next week. I can save you on a complete set or price just the intakes, but I think you'll see its worth your while to get a whole set as opposed to getting individual rockers.

I will shoot you a PM.

I'll advertise my sale at the beginning of the week.

Thanks

Todd

ARI...those should have been fine. I have been running them for years on .780 cams and zero problems.


Do you still have the broken ones? I'd like to look at them if you dont mind..on my nickel.

I have to look for them ,I migth have thrown them out ,not sure thougth


one rocker split in two and the other one was striped at the threads

I ended up putting a solid cam back for now


also the rockers had miles/runs on them


do they fagtige (sp) over a period of time ?

Yes, they can definately fatigue. It makes more sense now that you mention they have "miles" on them. They are excellent pieces in my opinion, but like anything, yes they can break over time but I would have to assume they have had a more than useful life. I just dont see them break without an explanation of oil starvation, too much spring, binding conditions, plugged oil holes, over-revved etc.



I just took a set off a car last year that I know had 17 years on them. It did finally break one and it was time to call it quits.Put a new set on and hope the customer can get another 17 years!

If you haven't already purchased the 440-1 heads then maybe consider going with the EZ heads instead. The EZ heads are capable of 800 hp when fully ported and they'll accept standard rocker arms. That means you can reuse your existing HS rocker arms and save some cash.

Thats a good thought as well. EZ's and SRs also use the standard rocker set up you have.

The -1s will obviously make more power if that is in the plans later on.

thanks for all the replies.

I know alot of things factor in,but how much HP can i get from a heads swap?(from RPMs to -1s)


thanks mike

The Indy heads pick up about 100 hp over the Edelbrock heads if you have the compression and cam.

Once again, if you haven't already purchased the heads then think about the EZ heads rather than the -1 heads. You can make 800 hp with the EZ heads which is going to be more than the stock block can handle anyway. No reason to put the -1 heads on there if all you're going to do is blow the bottom end out of the block.

The EZ heads allow you to reuse your existing headers and your rocker arms. You said money was tight so that seems like the way to go to me.

if you want a head that you can kind of "grow in to", the 440-1 is the way to go IMO.
those big peak horsepower numbers from magazine dyno mules means absolutely nothing until it's backed up at the race track.
the simple truth is that the 440-1 head will make more power at any and every point in the rpm band on the dyno AND at the race track. they've been a proven cylinder head combo for over 20 years, why reinvent the wheel.
that extra power is especially useful for the bracket and class racers that need the consistent E.T. and also want the big MPH. the -1 heads can really shine in that scenario.
for the guys with aftermarket blocks it's a no brainer over the EZ heads.

even though they cost a little more, they're much more cost efficient in the long run, even with the more expensive rockers.
now, with that being said, if your really budget limited, the EZ head "might" be a good choice, but the 440-1 isn't really that much more money.
to the statement of "blowing the bottom end out, that could happen on a stock block at 700 hp too, it just depends on the block and the combination of other factors. guy's have been succesfully making 850+ HP with -1 heads for a very long time.
in any event, the Harland Sharp rockers have served us very well over the last 15+ years and cost a bit less that some of the other offerings out there. i've never personally had one break although over time, any rocker will finally give way when the spring pressures and cycles exceed a certain point. i replaced a set earlier this year that were running on -1 heads for the last 12 years with 1.625 O.D, 850 lb springs. their was no appreciable wear on the shafts or the bearings. we put the old ones on a backup combo with less spring (650 lbs.) the change was made just to be on the safe side.
one other point, the HS rockers clear a 1.625 spring on -1 heads without any clearancing of the rocker. the same can't always be said for one of the other popular rocker choices available, even ones that cost more.
sorry this was so long winded. i just felt it needed to be said.