Looking for the best rocker arm

[Chryco Psycho]

Need the best quality Rocker arm for the B1 BS cylinder head
 preferably not alum as this is a street engine & not needle brg rockers
Stianless investmant cast would be perfect
Thanks for the help 

[jvike]

Most performance rockers are aluminium, so I guess I'd check out what Mopar Performance has, but I kind of like these ones. http://chucker54.stores.yahoo.net/hualrotiproa.html Also like Harland Sharp.

What do you think about the B1 BS head?

[ntstlgl1970]

What about uh, I'm not positive on the name but "rocker arm specialist" or something like that, usually in the back of mopar action/mopar muscle etc. Pretty sure those are investment cast stainless non-roller shaft fulcrum. I'll look around. There was an article on them somewhere recently. The BS heads don't take a special rocker if I remember right.

here is a pic from the ar engineering website
http://www.arengineering.com/photogall/shoot2_15_04/IMG_1451_450.jpg

www.rockerarms.com

[Chryco Psycho]

T&D make a alum rocker with Needle brgs , T&D make a great product but this is not what I am after for a street build
 I just talked with Gary Patrick @ rockerarms.com , he nothing with a high enough offset
 The B1 BS heads Rule , small heart shaped chambers , high swirl & large ports , I expect 700 hp easy with 512" underneath them
 I will check with Jesel in the AM
 just sent an email to AR engineering to see what they may have
 I will not use Harlands , both alum construction & with needle brgs , I like neither
 thanks for the tips so far
Neil

[bb71challenger]

Hey CP, is that 700 hp possible in a 512 on pump gas? Sure would be nice to put down 550+ to the rear tires   

[Chryco Psycho]

the smaller EFI 440 I just did with far poorer heads made 710 HP on pump gas , 415 at the tires on a mustang dyno which read at least 10 % lower then others do
 this one could touch 750 hp or better 

[Changin Gears]

the smaller EFI 440 I just did with far poorer heads made 710 HP on pump gas , 415 at the tires on a mustang dyno which read at least 10 % lower then others do
 this one could touch 750 hp or better 

Do you typically see ~40% loss in the drivetrain with a Mustang dyno?  What trans and rear ratio?

[bb71challenger]

the smaller EFI 440 I just did with far poorer heads made 710 HP on pump gas , 415 at the tires on a mustang dyno which read at least 10 % lower then others do
 this one could touch 750 hp or better 

Damn, do we lose that much hp from the flywheel to the tires? I always thought it was like 150 hp max that was lost along the way.

[ntstlgl1970]

It would be cool to see a buildup with the BS heads, you never hear much about them though they have been around a long time.

[Chryco Psycho]

RWHP was 418 Hp & 373 ft lbs TQ
Net was 590 hp / 530 ft lbs TQ
Gross was 710 hp /636 TQ
 this will substantially beat up the 500+ Shelby mustang as he has dynoed those as well , the mustang will put down about 388 to the wheels & we hit 416 so almost 40 higher & with more tq as well , the best part is it is all under a stock 68 RR hood , no scoop ,nothing ... beware 
Yes it is typical to see that loss from RW - Gross HP with the Mustang dyno , the mustang is the stingiest dyno as far as actual #s but has amazing repeatability
 the car was a 68 RR with 727 Auto & 4.10 Dana with 4 wheel disc brakes & full Multi port EFI , 1200 CFM T body & 58 lb / hr injectors
 I will get results fot the 512 B1 monster once we get it running , it will likely be in the Oct time frame 

[nivvy]

mustang dynos are totally gay and make no sense......... actually all dyno's suck... ET and MPH tells it all 

I just installed some 1.7 harlands and i love em... 

[71chally416]

A dyno is only as good as it's operator. I worked in a shop that had a Stuska engine dyno with modern software and the customers (especially the GM guys) were always asking us to give them bogus dyno sheets with inaccurate figures along with their real ones. No problem, just change the inlet air temp and you have 50 more HP. They are useful though for checking cylinder temps and sorting out engines and carbs. I ended up yanking my heads for more port work and changed my Intake when I saw the HP nosed over badly after 5,400. It didn't have enough volume in the ports for the engine size. I moved the peak up to 6,400 with the changes and gained 40 hp. Don't know nothing about chassis dynos but I'm sure they can be inaccurate too. I've heard just tire pressure can alter the figures. The real proof is always in the timecard and the scale. 

[Changin Gears]

Used to be an old saying - "you don't race dyno's".  Thats not true any more.  There are plenty of people that spend lots of $$$ to get a good hp number and nothing on the chassis.  They can never hook it up at the track, blaming the massive horsepower they have.  I don't get it.  I see a dyno as a tool to get to an end result.

[71chally416]

I know a guy that has a ProMod car that's like that. Two cars will go down the track in front of him and do 6.20's and he'll do a 7.20 and then blame the track.

[Chryco Psycho]

Dynos are just a tool , good for tuning & finding problems & repeatability so if you make a change you know if you are better or worse but as stated the number can be fudged in any direction , the guy I use runs a lot of modern stuff & gets a good baseline from RW to net using then & knows approx what the engine will do based on that but it is still just a number