OPIE272

KAAMA
Why not run the 1.8 on the intakes and not the exhaust?

formula31

OH, and if you are gonna use the 1.8 rockers, make sure you check valve to piston clearance very closely.

KAAMA

iTrader: (1)

Opie272, You can run the 1.8's on the exhausts if you want, but if I remember correctly it's on the intake side that you get the benefit. JimV is the one who told me this and I think he did some dyno testing with some different rocker arm ratios. JimV's number is 616-735-0800.

bobl

Kaama, I've run Scorpions for years with no problems. But, they have all been hydraulic roller cammed BBCs with an RPM limit of about 5700.

Offshore Addiction

to change the ratio on your rockers is ok,but remember......its extra pressure on your studs and guides,your lift gain is going to be a .030 gain which is going to change your spring pressures...you may bind your springs.......

Ric232

Okay. Back to one of my original questions:

I'm a shadetree mechanic at best (did the mods below myself). Can I do this swap myself CORRECTLY? How difficult is the adjustment procedure?

I actually trust myself more because I will take 8 hours if necessary to do the job right.

blue thunder

Assuming you can get the valve covers off without removing the exhaust manifolds, it is quite simple. I though think this change in and of itself will have no noticable positive affect. Maybe a little gain if you change the ratio, but don't know if you were thinking that. Really nothing wrong with the stamped rockers in a stock application.

BT

bobby daniels

YOU DON'T JUST THROW ON ROCKER RATIOS AT RANDOM IN ALOT OF CASES IT WILL HURT !!!!!! IT DEPENDS ON CAM AND RPM RANGE YOU WANT TO RUN MOST BB CAMS A GROUND AND FIGURURED FOR A 1.7 SOME BLOWER MOTERS WITH A BAD EXHAUST PROFILE CAM WILL BENIFIT FROM 1.8'S OR BAD MANAFOLDS WOULD ALO BENIFIT
N/A MOTORS WITH POOR INTAKE WILL BENIFIT FROM 1.8'S

BUT THIS IS REALLY ONLY A BAND AID

CROWER AND COMP ROCKERS HOLD UP VERY WELL IN STEEL THEY ARE MUCH STRONGER AND HAVE LARGER BEARINGS
THE GOLD CRANES ?? WELL CHECK THEM OUT THEYRE KNOWN TO LOOSEN AND FAIL ON OCCASSION

SCORPION IS A PRIVATE LABEL HARLAND SHARP

KAAMA

iTrader: (1)

Bobby, That's pretty interesting. I have heard that the Harland Sharps are a good rocker arm and it sounds like the Scorpian brand rockers are probably just as good by what you've stated. Cool. I think I'm going to replace those 1.8's with some Scorpian 1.7's

Havasu Cig

I had Jesel's in my blown 510 that I had in my cat. They worked great without a problem. We did have two Crane hydraulic lifters fail though