Low Ratio BBC Rockers
 

Does anybody have a set of low ratio BBC rockers (1.5 orso) that they would either like to get rid of , or even loan out , or rent , ect... ????

I know Harland Sharp makes a set of 1.5's for a BBC
I am wanting a set for a bit of extra insurance breaking in a flat tappet cam.

Anybody ????

Thanks , Scott

Scott, I see your burning the midnight oil!!! Aren't boats fun!!!

How many different places are you going to post this? I've found three so far.

I am a WD for Harland Sharp if youhave to be new. Why are you looking for them?

Hey Brad , Looks like you were up late yourself !! Yeah midnight oil is right... It seems thats about the only time I make boat progress... I got the rear hatch completly fitted ready for paint yesterday evening & then went home & finished up putting the bottom end of the motor togather last night....

4 am to bed & then back here at the shop at 8:00
Everybody should own a boat & be self employed !!! lol...
However I wouldn't trade it....

Thanks Dean , My thinking was that it would help lower my open spring pressure & inturn helping with break in. I know it would still be the same on the seat but thought that it couldn't hurt ??

Don't hold me to the exact spring pressures b/c I am a bit short on sleep & my #'s are wrote down at home but I think my pressures are around 135-140# on the seat & somewhere around 340-360# orso open.... I will most likely just remove the inner springs & still use EOS in it & either Rotella t , or the special valvoline that still has the goods in it.... I just thought it would be nice if I could keep from removing the inners ???
Its not the time that it takes to remove & reinstall the inners that bothers me it just that I hate removing springs on an assembled motor.

Anyways If for some reason I decide to buy a new set I will let you know & as always I appritiate your help... Talk to you later , Scott

I use about the same spring pressure on my flat tappet solid cams and the last 3 I did, (all within the last month) I just used regular Rotella and ran the engine ffor 30mins at 2000-2500 rpms at initial start up and havn't had any problems.

I have a set of used 1.6's that you can use. they need to be torn down and re lubricated and then put back together before use. They have been sitting on the shelf for a long time, and are a little sticky.

Good luck. Jeff

Thanks Jeff , I appritiate the offer & will definatly keep that in mind... Glad to hear you had good results with yours , I have never had a problem with one but I just want to make sure I cover all my bases... I know there have been alot of flat tappets wiped out in the last few years... Most of them self inflicted & due to the oil issues I know but just thought extra insurance wouldn't hurt...

I know thats the "normal" cam break in procedure but I just hate cranking a fresh motor & holding it at 1800-2500 RPM's for 20-30 min.... Especially without a load on it. (& yes before somebody says it I understand that the lower ratio rockers would not change that situation.)

Like I said Thanks for the offer & I will let you know...

There is absolutely no need to change springs or rocker ratio. On all my engines I DO NOT change a thing for break in. One thing you do not want to do is run the engine at 2000 RPM for 20 minutes to break the camshaft in....You will have washed the rings out of the engine due to excessive fuel run through the engine without proper load applied. I would use Pennzoil 25W50 GT Performance for break in and use. The oil has a good amount of zinc.

I agree on the not wanting to run it at that RPM without a load on it causing the washdown...

Please don't think I am disagreeing with you on the spring pressure issue because as you already know I hold your experiance , reputation , opinion & help in high regaurd... But I am curious as to not worrying about the spring pressure issue ? I am not one of those people that believe everything I read or hear & I know that the cam companys like to cover there butts esp. with the issues they have had over the last few years... I just know that I have always heard & followed that aound 120-130# on the seat was the cutoff for break in... Just courious as to your thinking behind that ? & like I said your opinion is held high & thats why I am asking... I am always willing to learn , esp. from good sources !!

I always learned that it was the open pressure that is the killer, but I would like to know what Dean has to say.

Same here , I believe that its somewhere around 320# orso on the open that most recomend as max & that was my main reason for looking for the low ratio's b/c it would keep my preasure below that during break in.

As long as you flatten it out before you put it in the boat, you can always cahnge it. :party-smiley-004::evilb::grinser010:

Like to think ahead huh !:p :D

Just cheacked & my pressures are 140 on the seat & 330 open

I've got one that was broken in on 150 seats. and after a couple hours I am running it on 190 seats and 500 open.

Those cams are a lot more resilient than people give them credit for.

I have found that it is most often the camshaft being defective.

I can only remember 1 in the laast year out of anyone that I know that uses them that has killed one. And that was me.

Had a bad carburator and couldn't get the thing to run until it was to late.

You'll be fine.

Thanks , That does make me feel a bit better. Like I said I have never had a problem but I just wnat to make sure I cover all my bases...

Btw : You have a sweet magnum , As you may already know I am a huge fan of the classics myself !

I have been running it with an engine that I had in the shop, but I am building a really nasty 468 blower motor for it.

250 blower, twin 750's, chiller, 7.6:1 dished pistons, 1/4 long rods, 4" crank. 242/250 .680 lift solid roller cam on 112+4, edelbrodk marine aluminum heads, all the regular highe dollar chit.

I have most of it laying around that I hadn't been able to sell, so that stuff will have a home now.

Engine should make that boat cook pretty good.

Thanks for the compliment. Good luck with your project.