What springs come on eddy performer RPM heads

12many said

I ran the big block Erson TQ20 “The Performer” cam in a big heavy 70 D200 w/a low compression 400 (3.38” stroke) Auto, 3.54 gear, 33” tires back in the mid 90’s. Was a great cam, very mild rump to the idle, strong for a daily driver, saw no problem with it or shortcomings. Prior to the internet you just slapped em in and that was that. Now there’s a little bit of revisionism I think. Sure you can do better, but you have it, it’ll work great. Keep in mind It doesn’t stop working or being good just because theirs better options today.

Click to expand...

The hard part of telling what will happen with these older, slow ramp grinds is the effect of the duration on low RPM dynamic compression.... if the tail ends of the ramps are really slow, then they have less effect than might be apparent. But there is also a lot of subjectivity in the above statement that can't be quantified for people...... 'strong for a daily driver' means what exactly? Plus things like the stall speed for the TC in that D200 trannie is not mentioned....

The only way you know with any certainty that you are not hurting the low end torque (and driveability) is use a short advertised duration, faster ramp cam like the Howard's.

With all of these cams's RPM limits not being all that high, I'd run the Edelbrock springs as-is for starters with a mild hydraulic cam like all of the ones being discussed; the Howard's cam would be more of a worry due to the faster ramps, but the rest would be fine IMHO. Those springs are decent, just not suited for things like .550" lifts and solid cams with their fast ramps. Easy to change later if any issues discovered, and any float is not likely to push the valves into the pistons with these low lifts. We used them with a Crane H-268-Z2 with no issues so far.