Jump to content

Roller Rockers


BruceBowker

Recommended Posts

Bruce, I saw that Tony V. is parting out not one but two crossflows...one is Jay Ivey built/tuned. So you might want to reach out to him and buy one of those for the basis of a hot motor. According to Ted Wenz of MWE, you can get 145 out of a reasonably reliable crossflow stroker.

Link to comment
Share on other sites

I suppose an even more important question is - is it worth the money? Will I see any reasonable power increase or other advantage?

 

I looked into this when I had a crossflow powered car and was told by one of the top crossflow tuners in the UK, that money is best spent elsewhere. He was a big advocate of a programmable 3D ignition system. According to him benefits were twofold:


    Significantly better mpg. Although that's not why we buy these cars, it does mean you have longer touring range

    Much better driveability. He said that an engine with a Kent 244 and 3d ignition has better driveability than an engine running the milder 234 cam.

 

-John

Link to comment
Share on other sites

Although my 1700 Xflow with 244 cam has the roller rockers, my reading on Blatchat supports John's view. Roger King (UK Xflow guru) actually seems to have negative views of the roller rockers, and seems to prefer the standard valve train for highly tuned Xflow's. There seem to be many happy UK Xflow owners who have added the 3d ignition.

 

Steve

Link to comment
Share on other sites

Roller rockers.. when i first got our car, i had to replace one of the rockers because the adj. screw was stripped. I was looking into the roller type to just replace them all. Really nice..but probably the last modification i would do to the engine all said and done if i had money left over..which i never do.

Link to comment
Share on other sites

Steve:

 

Are you using 3d ignition? I have a vague memory that you are. If so, do you like it? Has gas mileage improved? (I get 10-14 around town, 18-20 on the highway). I know you are making more power than I am, but your hotter cam may explain that somewhat.

 

Mike

Link to comment
Share on other sites

re: the use of "standard rockers"

 

If you're planning on running the engine in the 7000 rpm range you will need to replace the standard rockers and stands with machined steel ones, instead of the cast iron stock pieces.

 

The rocker shafts and stands will actually deflect with the heavier springs and higher rpms.

 

Don't ask me how I know this.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...