Roller cam vrs flat tappet

[Dan64]

I'll leave the cam talk to the guys on here that forgot more than i'll ever know but if your'e looking to gain some performance you may want to try a bigger carb. 650 on a 440 seems small to me?.

 

[66Satellite47]

I'll leave the cam talk to the guys on here that forgot more than i'll ever know but if your'e looking to gain some performance you may want to try a bigger carb. 650 on a 440 seems small to me?.

I agree the 440 will surely want 800-850 CFM. Many SFT cams in the high 500 lift to mid 600 lift with duration to match the drive train will produce around 525 to 550 HP maybe more with the EDE RPM heads.

 

[Houle #382]

I'll leave the cam talk to the guys on here that forgot more than i'll ever know but if your'e looking to gain some performance you may want to try a bigger carb. 650 on a 440 seems small to me?.

I tried a 800 before I bought the 650 AVS-2, she ran pig rich all the time especially at idle. I tried different jets and rods and it didn't seem to run very well. I called Edelbrock and talked to a tech and his recommendation for the 650 AVS-2 was dead on. He told me the 650 light to light will out run a 800. He said if I was going to run the car at the strip the 800 would give me a little more at top but the 650 is a much better choice for my setup and basically a street car. The only changes I made to the 650 is I replaced the factory red springs with pink springs and I changed the secondary jets to .104's for the stock .098's. Right now she pulls just as hard up top end as she did with the 800 and she's not nearly as rich at idle. One thing a lot of guys don't remember is these 440's came from the factory with 650's on them and the new AVS-2 carbs are a world of a difference between the old 650 and the new especially with the annular boosters. I'm extremally happy with the way the 650 runs.

 

[1 Wild R/T]

If you can't get more air into the engine then theres no reason for heads that flow more air... Kinda defeats the whole purpose..

 

[Houle #382]

If you can't get more air into the engine then theres no reason for heads that flow more air... Kinda defeats the whole purpose..

I totally agree, I never had plans on changing heads or going with headers and that 650 AVS-2 with a couple of changes I made to it runs perfect with my Performer RPM intake stock heads and stock exhaust manifolds.

 

[rumblefish360]

You can do really well with a SFT cam. The Hyd roller offers a quite valve train. No rocker arm tapping due to the lash. The roller has the advantage after the initial lift. That’s about it. IMO, a street driven car can use a solid lifter cam very well. A roller isn’t needed.

If your looking to produce a mean street beast of a ride, ether will do but the solid will do it cheaper & still be very effective.