Hey, guys I just saw a post that said one of the members here was selling a D16z6 head with roller rockets from a D15b. but what I would love to know is what year D15b would you actually be able to use the roller rockers that will fit on the D16z6 head.

 

do you mean the rocker arms...

 

I think he means from a VTEC-E head I believe they had roller rockers

 

Is this for real? Like can you do that? If i did this could i expect to see higher hp numbers? This is the first time i've heard of this.

 

only the vtec E motors had roller rockers... and i believe they are not innerchangable between d series heads

 

what exactly do you hope to achieve with roller rockers?

 

In for the answer. I'm sitting here scratching my head.

 

I read about this last night, correct me if im wrong here guys. I read that you can use the D15z1 Vtec-E roller rockers. But in order to use them you have to use the z1 camshaft too. So it being more Economical oriented engine i dont think anybody really see's any advantage to using them.

 

I believe entire valve train swaps (including cam) are possible between the Y8 and Y5 and also Z1 and Z6. I've read multiple posts on people that have done it. But the cam must match the valve train.

 

So what's the benefit?

 

from an old honda tech post
"This is, by far, the worst idea I've ever had (the whole reason I'm deleting it). The rocker arms didn't line up properly, the cam caps needed to be align honed, and it would need an oversized custom cam made." No one makes cams for the vtec e head...

 

Second question; what was it about "roller rockers" that people thought would net them so much horsepower?

 

I'm guessing the theory is less friction in the valvetrain=more power. That's what I've always assumed being raised in a domestic v8 family. In a built race motor I can possibly see a benefit. In a d series I wouldn't waste the effort.

 

Guys roller rockets are not so much for horse power gains as much as for quick revs.
This would work best if you had a lite flywheel and lite weight pulleys. Roller rockets have much
Much less friction than the stock one. And so therefore will rev faster.And if it really didn't do anything why would Honda invest millions and millions to have them on all the si 2009 models and up. I hope I can find some answers and not a lot of negative talk.

 

you were given the answer a few posts up here>>

 

Some member on this site claims he installed some roller rockets on his D16z6 head and I would like to hear from someone who has either done this or know what motor these came off of and no its not the hx with the vtec-e this one will not work because it does not have the third vtec lobe.

 

Ya there's a lot of that on here....

look at my last post

 

But we're not talking about 2009 models and up are we? We're talking about tired old D-series engines. And do you honestly think that after all these years this idea wouldn't have caught on like wildfire if it actually worked?
So ask him how he did it. maybe he's all talk.

 

Hey, let me just say just one things ,most if not all real race motors have roller rockers that's why Honda decided to put them on the new si. End of story. They do something now if you can't use your imagination an see with your mind a wheel rolls and a pallet slides. Stop the negativity. I don't see the point to a lot of things people do to hondas but I respect that if they want to spend the money to do it more power to them.

 

Then be the pioneer and do it. It was already demonstrated by someone in the past that it was attempted and it was a fail. If you think you can be successful then do it and stop talking to us. Dreamers talk. Trailblazers do.

 

If this was doable don't you think there'd be many more threads on it....ya you're in no place to tell us "end of story" by the questions/responces you're posting

 

I guess it would easier than a head swap say from an HX to an EX for "performance" or from an EX to an HX for MPG. To my knowledge you can't just swap the roller rocker portion from an HX and use an EX cam, nothing would line up. Same applies to VX (D15Z1) to an EX/Si (D16Z6).

 

When you can actually understand all of the benefits of roller rockers, then you can say "end of story". The fact that you think Honda spent "millions and millions" to switch to roller rockers in the '09 SI is comical, too. On top of that, you seem to think that Honda switched to roller rockers because "race motors have [them]".

Are Z1 roller rockers a direct bolt-in for a Z6 head? No. OP, if you're actually interested in doing this, look into using a Y8 head rather than a Z6 head. Some time researching this idea will tell you why.