wow i guess he gets an F then. i'm sure if you actually post something help full other than correcting gramatical errors there wouldn't be two usless posts in this thread (yours and mine)

oh i thought the harland sharps were adjustable.

 

No adj shaftmount rocker arm will fit under stock V/C... u need spacers.

U need to machine the pushrod holes for the new geometry

and you should probably get MSD LS1 Truck wires... i used MSD LS1 wires and they were tight... Truck wires are a little longer and better/easier to use with the spacer...

doesnt have to be MSD obviously but truck wires are longer than car wires

I run T&D Shaft Mount Adj...

 

SDPC has the Jesel's for 695 and spacers for 159.

 

The Jesel's you are talking about are non-adjustable. You're still using a bad solution.

Get adjustable and use the required lash.


Jesel Pro Ultralights

 

I agree with the above statements. Just get a very good rocker arm (T&D, Jesel) and use the required spacers. IMHO, this is the best way to go.

 

Thanks for the advice, but the reason i said anything at all is because when peolple skim through a thread, posts like his are most likely to get passed by. If he rewrote his post someone would most likely respond. No need to get **** about it.

As far as the HS's, i looked at their site and nowhere does it state the LS1/LS6 rockers are adjustable. All of their other rockers for different applications state they are fully adjustable, so if the ls1's are, I'm guessing they'd say something.

Anybody know different feel free to chime in.

 

OK, so there is no such thing as an adjustable rocker arm that doesn't require spacers, and then when I do add spacers, I have to not only get longer spark plug wires, but I then have to machine the pushrod holes for the different geometry?

 

no just the .030 you cut off the the heads. the changing of ratios just moves the pushrod closer to the stud when increasing the ratio. further away when lowering the ratio.

 

This is getting tiring...........crane part #144750-16 is an adjustable 1.7 rocker that fits under the stock covers.....they are identical to the 144759-16 that are 1.8. They come with pushrods, guideplates, and adjust like the old school chev rockers. Call CRANE direct, not distributers who will say they don't make it. Vinci sells the identical part with their name on it although they are being phased out for vinci's new version of the rocker that is now being advertised as 1.79 and 1.89. The new version is misleading since the 1.79 is actually only 1.79 while the valve is closed and as the rocker pushes open the valve, the ratio DECREASES to 1.7 at full lift due to the angle of the rocker to pushrod. This is a variation of RAMP RATE and not lift. The rocker should be looked at as 1.7 since the final lift at TDC is the same as 1.7.

All said, my vote would be the comp cams pro-magnums 1.75 which fits under the stock covers. The additional lift is near nothing and there is no way you can't run it unless you have a stock bottom end whith the mother of all cams. .580 lift is at .597 with them and if you are that close with the springs.......

 

Thanks for the good input.

The cam I have on order is a 240/248 .605/.620, so where would that put me on the lift? Something like .625/.642? I guess I could always have a smaller lift cam made if I planned on running those rockers, but the cranes might be best for me.

Per Crane they are adjustable and are true 1.7 rockers, retail in the 800+ range but can be bought via Crane for $738. Best part is that none are in stock and it will take 1-3 months to get them.

 

Guys, let me clear up a misunderstanding. The 1.79 ratio that is shown is not our overall ratio. We are now using accelerated lift technology. What does this mean? It is simply a new design of the rocker arm body that locates the pushrod seat low in the body with respect to the center of rotation about the shaft. Because the pushrod seat area travels in an arc as the lifter/pushrod moves upward during the lift event, the pushrod seat moves slightly away from the center of rotation around the shaft. This movement of the seat through its operating arc causes the effective rocker arm ratio to decrease. The end effect is this: a 1.7 ratio "ACCELERATED LIFT" rocker arm actually starts opening the valve at a ratio of 1.79. As the valve opens, the rocker ratio decreases to the 1.72 advertised ratio (this occurs at about .250"-.300" valve lift) and then maintains the 1.72 ratio through the rest of the lift cycle until it starts back on the seat. It goes back on the seat at a 1.79 ratio.

 

I though that was what I said......Anyway, see if VHP has any left of the original model.

If not and it is a custom grind you are ordering, Make the specs lower on lift and you will be able to use the comp magnums which are lighter. There is a slight affect on duration too. Tell comp what you want to end up with using their 1.75's and they will grind it that way for you. Good luck.

 

comps 5054170 is 1.7 and is shaft mount. Is it possible to pull the threads out of the head on a stud mount with high spring pressure?

 

just got through talking with joe vinci. yes these 1.79 accelerated lift rocker arms are adjustable and fit under the stock covers. just give them a call. the number is in his sig just above.

 

Somebody at Crane goofed! They have plenty of 144750-16 rockers. Joe Vinci's explantion of the Crane "Quick-Lift" rocker geometry is exactly right. The 144750's start the valve off the seat at the rate of a 1.79 ratio rocker and then the effective ratio decreases to 1.72 by about .300" valve lift. That ratio is maintained throught the rest of the lift cycle and it really helps establish early flow into the cylinder. Crane has developed a series of new cam lobes to compliment the "Quick-Lift " rocker geometry. They provide relatively short seat to seat timing for good tuneability and yet have effective durations at .200" of lifter rise of cams that are stated to be 6 to 8 degrees bigger at .050 lifter rise