I have a 406 with a set of AFR 195cc heads that I had purchesed about 3 years ago from AFR.

I am running a comp cam solid flat tappet with a 236/242 duration 501/510 ( 1.6 rocker on the intake making the lift 523), RPM Air gap.

I would like to open the heads a little more (will change cam)- Is there anything that I could do to them or are they maxed out at AFR??

Sell them and get some 210 Eliminators......

What will that do for me.

My car is a weekend warrior - want to keep it streetable.

Why would it not be streetable with the 210's???

I think the 195's would be better for street use. I don't know for sure but I was thinking you usualy put the 1.6 rockers on the exhaust side. Exhaust flow on SBC heads is always lower than intake flow. What about running 1.6 rockers all the way around. Would be easier.

As I've said before, I don't think you find heads that are too big for a 406. I'd get something in the 215cc range. You need heads that flow like BB heads in a 406.

Big heads, smaller cam will work great. Misery, is small heads, big cam.

Good luck!

I have AFR 195 CNC jobs, with 1.530 springs, have them apart now, I could not see what needs to be be done as these cnc ported heads are pretty well cut. Only thing I did was match bottom exhaust port to gaskets . I was hoping to clean them up to match the Street Eliminator head but I have never seen one and understand that they are a differant head. As mentioned, you could try to sell these heads prolly at a small loss and purchase the Eliminator 210.

I like the larger head idea - could keep the cam on smaller side. My concern with my build is that I am not utilizing the 406 motor to it full "streetable" capability with 195cc heads. SHould I upgrade the heads or just go a little bigger on the cam - maybe go roller to maximize lift? what do you think.

How fast are you trying to go?
8's in the quarter?
There are plenty of NA cars in the 9's and 10's with those 195 AFR's

My build as follows:
Dart block
Callis Dragon slayer crank
Crowler 6" rods
JE pistons
10.8:1 Compression
AFR 195cc heads
Comp cam solid flat tappet 236/242@50, 501/510 lift on a 110 (1.6 rockers on the intake side only)
RPM Air Gap
Holley 750
1 3/4" exhaust
4spd m20
4:11 rear
26" tall tire

When I built this the engin builder wanted to put a little bigger cam that was on a 106. I was concerned about streetablility but now I would like to experiment. Should I increase my camand keep the heads or upgrade everything (heads and Cam)

Keep the cam, heads are easier to change later. you said you're experimenting?

What do you mean keep the cam, heads are easier to change later? Did you mean change the cam?

I spoke to someone over at HD ultradyne cams and he told me for a hot street motor my engine is undercammed by at least 10 degrees. He recommended a solid with a 251-259@50 on a 108 with a 540/535 lift

Seem too big?

Man your combo would be great with a Comp 294S.....294/294.....250/250....525/525.....110.
I have one new in the box than I plan to swap to one of these days......

How much more HP & TQ do you think I will generate?

I bet 15-20 hp and a good 500 more rpm's to play with as well. Probably wont pick up torque at all. Gonna move your current powerband up 500 rpms or so.....

6D9 our builds are very similar. I do not know if 20hp is worth the change

Can anyone desk top dyno my combo and compare it to a bigger cam

My build as follows:
406
6" rods
10.8:1 compression
AFR 195cc heads
comp cam 274s 236/242, 501/510 @ 50. 1.6 on intake side making lift 523.
Holley 750DP
Hooker super comps 1 3/4"
Dr gas X pipe
RPM Air Gap

Want to change cam to 251/259@50, 540/535 lift on a 108

Can you run a comparison

thanks,

What about just leaving it alone and putting a small bottle on it. Something like a 75-100 shot. This way you keep all your drivability and then when you want more power...push the button!