bought a set of ford sbf 1.7 shaft mounted adjustable roller rockers to fit the 350 or v6. they came in today. first glance i think they will work with a minimum of trial and error on the engine. also wanted to find a set of ls 1.7 adj rollers. little more pricier than the fords. but i do like the fords so far
We want pics LOL. these ones? https://www.ebay.ca/itm/20317494017...9QP2371OhgDWDGJE3wuyqkcKsQBG9exkaAmkBEALw_wcB
thats the pics, sean. guy had a set he bought and went another way. lot cheaper than the ebay ones. hold up the assy to the 350 head, first two sets match up. the last two sets match up. just have to cut cut some out the middle all line up. thats easy. few different ways to mount them to the head w/o cost over run. like that never happened. lol but they are nice
IDK John. I'm at .584 valve lift now with 1.6's. 1.7's will get me .620, but piston to valve gets scary. Deeper notches I guess.
looking at the cam and the way they have to make big numbers, we're running out of head room. i think more rocker is viable with lesser cam lumps. hey, the nascar boys are up to 2.00 to 1. that's pretty wild besides these rockers are pretty.
The deal with most fully taken to the limit race motors running a roller cam to make additional power is not so much opening the valve higher for larger flow numbers as many of these motors are already at the sonic limit for air speed, and adding more flow if available only kicks up the air speed. the reason for some motors then running higher ratio rockers is simply to open the valves faster while not busting up the lifters and or ripping the lifter bore right out of the block, which is a problem due to the nature of a roller lifter and cam lobe and the leverage angle. Piston demand for air in these motors and even in far lesser motors that are not duel purpose is very high very early on in the lift cycle. It comes to a point where the faster you kick the valves open, the more power you will make. And just for the record, a solid lifter cam can open the valves faster then 98% of most roller cams unless your rich and can run bigger core roller which allows roller cam with lobes of a bigger base circle . This lessens the leverage for any given amount of cam lift.
i like hyd's, i don't mind solids. but i don't like rollers. like you said 'the force' doesn't like some things. i study the 350 and do things that can be done to it. and the 350 has some bad castings that we have to work around. but i like to do things people have told me it can't be done.
the sbf rocker shaft fits inside the 350 shaft. but that won't work unless i go back to night school for magic lessons. the sbf 1.7 non adj roller has the same bearing and shaft dims as the sbf adj. the non adj i reamed the rocker to buick shaft size just to see how it looks. would compare it to the alum 455 rockers fwiw. never gave it thought until now, the 350 never had alum rkrs like the bbb. at least i never seen any. have to buy some round and square stock for this. or maybe i can reuse all of the sbf stuff. useless notes; reworking the mopar dual quad tunnel ram intake, kind of cut too much out for ports. thank god for jb weld. lol
they are move reliable, just less precise and a bit less ratio. I find they get a bit loose. TA rollers for me... postons rollers going on my NA emgine. The first attachment is the solid flat tappet I am trying on the 12:1 NA engine and the second is for the turbo one.
