Hydraulic flat tappet

[socal_wrench]

Anyone ever use Rhoads lifters in a Boat?

I need to replace the lifters (have a couple that are spraying oil) and While i'm at it I'm gonna replace the cam (Isky 396270)/timing gear,Check out the bottom end, and all the gaskets.

BBC Ski Boat/ Cruiser

[RiverRacer]

Anyone ever use Rhoads lifters in a Boat?
Are you putting in that big of a cam that you need a bleed down lifter??:confused:

I need to replace the lifters (have a couple that are spraying oil)
Could you elaborate on that??:confused:

[gfinishline]

What? What are the cam specs? What is in the motor? What is in the boat? I personally don't like "bleed down lifters", can't see the need. Too many great cam grinds/customs to put the 'bandaid' lifters in the motor.

[socal_wrench]

The cam is 221/232 @.050\.542/.565 lift\ 114 ls\ Advertised RPM 2000-6500.

8.5:1??/ 454 BBC/ 990 Heads / Stock valves? / PG

As far as the oil spray I think the motor sat too long and possibly Rusted the tops of the lifters when in the compressed state, Or possibly collapsed

When I was bumping the motor over to adjust the valves, two lifters On The right bank , whenever the rocker would reach about 1/2 stroke There would be a Mist of oil coming thru the gap between the intake and head

My thinking about the lifters was To drop the power curve to almost Idle and still maintain the higher Rpm But now that I see what I wrote I don't think that I will need them . 2000 RPM is pretty low.

[gfinishline]

OK, that cam seems a little mild (IMO) for what you have. The spray is when you compressed the oil in lifter. What springs? Do you have roller rockers or? I ask because I think that at .560" lift (or more) the rockers must be 'long slot' <H> or aftermarket/roller type. If you have the correct springs, how about the Isky Mega 280? I .565"/232 @ .050, X .565"/232 @ .050, on 108 centers (in @ 103/104) Check piston to valve clearance too. It will pull hard from 2600 to around 6400 with a 'nice' single carb motor.

[socal_wrench]

George,
I think I Misled you. I have now Idea what cam is in it now.
I am planning on changing the Cam along with the Lifters, Springs to match and valve job.

I have never seen an engine Spray (A fine mist) oil from the valley like that before (Have seen them squirt oil out the rocker oil hole, Have the shirt to prove it).

The rockers look like every other steel rocker I have seen inside of a BBC (Late 60's Early 70's Muscle Car).

[gfinishline]

NO <H> on inside surface of stamping? Could be a problem soon!

[socal_wrench]

Looks like rockers will be on the "To Buy" Checklist also
Along with the Mega 280.

I Believe that is the same cam I Put in my buddies 390 FE . 72 Camper special That would beat most muscle cars around here. It;s really funny watching a farm truck blow by Mustangs.

[RiverRacer]

Looks like rockers will be on the "To Buy" Checklist also
Along with the Mega 280.

If you're on a budget these are pretty good!.

Comp! (http://store.summitracing.com/partdetail.asp?part=CCA-1411-16&autoview=sku)

[socal_wrench]

Same make and style I had on my Mustang II.

They work really well to about 9500 After that they pop off the valve!!:eek:

[RiverRacer]

I was thinking more like 6500 max for those, LOL..

[socal_wrench]

I was thinking more like 6500 max for those, LOL..

Yeh but it was sooo much more fun to let the motor go until it had nothing left. I think She would pull hard to about 9100 then start to taper off.

That one was built by a buddies uncle, But he made me do all the grunt work and be there when he worked on it and still charged me like $3500.

SBF @ roughly 400 HP no juice and a 2900 lbs car. Ahhh..... to 19 again

[RiverRacer]

Yeh but it was sooo much more fun to let the motor go until it had nothing left. I think She would pull hard to about 9100 then start to taper off.

That one was built by a buddies uncle, But he made me do all the grunt work and be there when he worked on it and still charged me like $3500.

SBF @ roughly 400 HP no juice and a 2900 lbs car. Ahhh..... to 19 again

Have you ever seen a Tunnel Port 302???, it never made production because the factory could never get peak HP out of it, 14,000rpm and HP still climbing but that's as far as the motor would go until it blew up, so they scrapped the program!..

[socal_wrench]

Yah Ford did alot of scrapping Programs back in the day. And still do.

Cammer 427 ring any bells?? They get onto somthing that will do really well (Race) And scrap it. Maybe the law suits (Mustang, Pinto) have the Lawyers Telling them to Stop?

[gfinishline]

This "Isky Mega 280" starts making power around 2600 RPMs. (in @ 4 advanced) This means "it idles rough", but it should allow you to 'pull skiers' in high gear @ 2600 RPMs. You could go to a Comp Cams 'Magnum' .0520"/230, .0520"/230 on 110 centers, (in @ 106) and gain a little more low end. (nice street car cam) I feel the Comp runs out at around 5800 RPMs. Also the Isky has more power between 3500 and 6400. (I think it's the lift and 108). I suggest 100/125 lbs of spring "on the seat", and around 320/370 lbs "over the nose", this will prevent valve float well into the high 6K RPMs. Comp springs, (#924) can be broken in all assembled, the Isky springs (for that cam) should be broken in "with outers only" and then reassembled for actual use. "A cam is not like a football" "You MUST DEGREE the cam into the engine timing, or you will never know "where you are at"! NOTE; .565" lift (@ zero or advanced) may contact your pistons!! Measure first!! Questions?

[socal_wrench]

Thank you for your advice G.
I have done a lot of street application motors. This is the first Boat I Have built.(Building)
I think alot of stuff is the same but it seems alot is different .
I covet having access to this great unwritten book of Know-How that if asked you can get answers and not only one point of view.

I Have silly puttied an engine before. And I will do that This time. I think because of Isky's warrenty policy I will Use their springs. Head gaskets don't cost that much.

Thank you so much.

[gfinishline]

I feel the ISKY springs are very much at the top of the food chain. If you need the max effort from your cam, use them but beware that they are some of the most difficult to break in! As I stated before, break them in using ONLY ONE OUTER SPRING, and then add the inner after break in. Sure it takes time, but it doesn't cost money!

[hm66Howard]

Yah Ford did alot of scrapping Programs back in the day. And still do.

Cammer 427 ring any bells?? They get onto somthing that will do really well (Race) And scrap it. Maybe the law suits (Mustang, Pinto) have the Lawyers Telling them to Stop?NASCAR put the kibash on the S.O.H.C. not Ford. They knew it would kick the Hemi's butt!!:D:D The cammer proved to be very successful in NHRA. :cool:

[RiverRacer]

Cammer 427 ring any bells??

Ring a bell, you kiddin every time I hear the word Cammer my blood boils, back when Ford dumped the racing program, I had the chance to buy as many as I wanted for $300 a piece, "brand new" in the crate but being a punk kid didn't have a pot to piss in at the time, what luck!..:mad::mad::mad::mad:

[RiverRacer]

Anyhow, talkin about Isky Cams that reminds me of an experience I had with a flat tappet, not sure if the springs are all that cracked up to be, there are only a few that makes springs!.. Anybody remember T Willy!..:D:D

[gfinishline]

"wrench" you don't need to pull the heads to R&R valve springs. I just started up a BB chevy on my stand, broke in the flat/hydralic cam. Then removed the rocker covers, and used a tool I bought from Summit to 'do the springs'. Ran with single outer, and then added the dampener and the inner for normal use. I tend to use "smaller cams" than most, but I never want to "run out of spring pressure", ever.