Thread: Franklin S4 roll coll and cam degree settings.

Who here is running Franklin S4 cams?

What do you have them dialed to? My motor is built but my power is dropping off after peak at 7500rpm. I have heard of people saying the FS4's should hold power to 9krpm at least? I think my cams are set to about 110degrees. I am contemplating trying 0,0.

What cam gears are you running? Did you check the shims after you installed them?

- I thought it was ideal to go 0,0 on round one if you have some dyno time to play with.



^What is the deal on the shims anyway?

Running the stock cam gears without the dowel/locating pins. Initially my engine builder set the cams up at the same degrees they used to run the local touring car motors, which iirc is about 110 deg. Motor made good power but yes dropped off a little early for my liking. Before we could play around on the dyno the TB screw struck. Only got the motor back together now.



I think that's what I also heard. 0,0 and then the power peaked high in the rev range. But I'm posting to hear from actual experience of anyone else who's used these cams. Gonna try and get to the dyno soon so want to know what options others have tried.

DR G, 0,0 on the Frank 4's push the RPM power band really high.

The very last one was 9300 rpm or something like that I forget it's been so long. I had 5speed degree my cams so I won't know what my power band is until I put the motor back into my car and break it in.

Cool thanks RB240. What other mods where you running there ^^^

I am using a full management and my rev limiter is currently at 9k rpm. If I can hold peak power longer I'd be very happy.

Here is my latest dyno graph before the TB screw hit.

Done at altitude so around 14% loss in power.

That car was stock compression, 20V header, 3" exhaust, HK$ cam gears and a realtime ecu.

you should degree your cams and not worry about what anyone else might say, their shim clearance may be different than yours