1.5 vs 1.6 rockers

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Adding 1.6 you are also putting more drag on your timing chain and all components in between.
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I wouldn't think the drag would be really any different than swapping in a slightly bigger cam??
 
huh...??? I was answering AndyF about 1.6's being a help to my combo.
But to answer your remark about my engine, my crank, rods, pistons, heads, valves, ports, pushrods, and rockers are all stock or OEM replacements. And a factory cast intake/TQ would work as well as my intake/carb for performance. Oh, you didn't mention the gaskets, paint or plug wires, they aren't factory bone stock either! Air cleaner? LOL... Pure Doofus.
Disagreed! I think your air cleaner is cool as hell...
 
Disagreed! I think your air cleaner is cool as hell...
I'm sure you've figured the reason for this thread. I'm trying to calculate exactly what I am to expect by going to the mag heads. I'll gain slightly bigger valves, better flowing ports/bowls, a bump in compression, better valve springs, and.... and 1.6 rockers. I can guess the rest of the list, but not the 1.6. Thus the reason for this thread. Then I'll use my best guess and see if they make me happy or disappoint me.
 
I'm sure you've figured the reason for this thread. I'm trying to calculate exactly what I am to expect by going to the mag heads. I'll gain slightly bigger valves, better flowing ports/bowls, a bump in compression, better valve springs, and.... and 1.6 rockers. I can guess the rest of the list, but not the 1.6. Thus the reason for this thread. Then I'll use my best guess and see if they make me happy or disappoint me.
Well why beat around the bush, why didn't you say that the first time... Also, COOL!..:thumbsup:..
 
Well why beat around the bush, why didn't you say that the first time... Also, COOL!..:thumbsup:..
Why? That's easy! I didn't want the conversation to be about "magnum heads" and all the pro's and con's, or the 1.7 Harland Sharpe roller rockers that I have and could use on the mag heads. Nope! I wanted it to be strictly about 1.6 rockers. So far we've had 3 pages of good info. Now, SHhhhhhhhh..... lets forget the magnum heads and get back to 1.5 vs 1.6 rockers.......
 
The 1.6 rockers along with everything else with the Magnum heads will be a nice added chunk, IMO.
 
Because the ratio is 1.6 to 1 it will be harder to push than a 1 to 1.5 ratio. It is simple leverage. a 1 to 2 lever is going to be twice as hard to push but travel twice as far as a 1 to 1 lever.

Thats why.

also even if the valves move the same with a bigger cam the higher ratio is still harder on the system.
 
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Trapster, enter your reply outside of the quote tags, above or below the message your replying to.

I see what you mean about leverage. That’s not what I was asking about. It was the “Drag” on the timing chain and components. I just don’t see it. And it would be so minor, why even mention it as if it is an issue or a problem to cope with. Just by your reasoning a bigger cam does the same thing. So by your reply, it is like your anti big cam because of drag.

The last thing I’m worried about is the drag created while building an engine. It’s insane to worry about it and even more so crazy to mention it as an issue. Why would you do that?
 
Yea, I fixed that, Quotes that is, and I am not anti anything I am merely pointing out the differences that going to a 1.6 will have on your engine. I am not sure that a bigger cam, assuming lift and duration matches the effect of adding a 1.6 ratio would be the same drag on the system. Probably a negligible difference if there is any though.
 
Because the ratio is 1.6 to 1 it will be harder to push than a 1 to 1.5 ratio. It is simple leverage. a 1 to 2 lever is going to be twice as hard to push but travel twice as far as a 1 to 1 lever.

Thats why.

also even if the valves move the same with a bigger cam the higher ratio is still harder on the system.
It would be harder on the pushrods? Maybe the lifters? Can't be the springs or valves. But heavier springs and bigger cam would be harder on the push rods/lifters than going to 1.6 in my way of thinking.
 
Having gone through a few sets and ended up with HS rockers that get adjusted once a year, I would HIGHLY recommend not putting your rockers on a budget.
Yea I have read alot of bad about "budget" roller rockers. I havent seen any other than those 179 dollar ones on ebay that's "affordable" and they have terrible reviews for the money I'd love to see some real world results like 318willun.
 
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Yea I have read alot of bad about "budget" roller rockers. I havent seen any other than those 179 dollar ones on ebay that's "affordable" and they have terrible reviews for the money I'd love to see some real world results like 318willun.

I've had great luck with my stainless PRW 1.6 rockers. They are a great alternative to the insanely priced HS rockers. One had the bushing buggered up out of the box, but they sent me a replacement no problem. They came recommended by Brian at IMM. He's a great dude who knows his ****.
 
Yea I have read alot of bad about "budget" roller rockers. I havent seen any other than those 179 dollar ones on ebay that's "affordable" and they have terrible reviews for the money I'd love to see some real world results like 318willun.
20150225_163722.jpg

I bought a set of those cheap rockers and even my tight *** sent them back the same day.. the Machining was almost non-existent and quality seems like total garbage... After I seen all the different rockers and all their imperfections there was no way I was going to take the chance...
 
View attachment 1715402667
I bought a set of those cheap rockers and even my tight *** sent them back the same day.. the Machining was almost non-existent and quality seems like total garbage... After I seen all the different rockers and all their imperfections there was no way I was going to take the chance...
Yea those do look crappy. Looks like they where drilled out and never finished.
 
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Talking about higher ratio
How about some 1.7 T&D B1 rockers. That seems to be the recommended ratio with that head
 
OMG! All that drag! You must be loosing at least 150HP!
I bet you rebuild your engine twice a year with all that’s going on in there!
:rofl::rofl::rofl:
 
I believe there would be more stress on the chain with a higher ratio but it would be insignificant... besides that is what my billet Rollmaster is made for .
 
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