Solid Cam
What are the correct spring (seat, open, and install height) to use with cam 280/284F10 247/248 525/530 Lift 110 LSA.
I was thinking about using Crane 99893-16:
* Outside diameter: 1.460 in.
* Outer spring inside diameter: 1.075 in.
* Inner spring inside diameter: .803 in.
* Seat load: 165 lbs. at 1.750 in.
* Open load: 426 lbs. at 1.110 in.
* Coil bind: 1.080 in.
* Rate: 408 lbs.

99893s will definately work. I have run these on .520 lift cams right up to .630 lift cams. I have found them to be very long lasting. Just be sure to get the installed height set up correctly.

Isn't 165 pounds seat pressure a bit extreme for a solid lifter cam??

I was thinking more along the lines of 125 to 135 pounds due to fast lifter/lobe wear?? Plus hassle of breaking in the cam..

Set me straight here...

pdq67

Deeboo,
That's way too much spring for a flat tappet cam on the street.
You want no more than 125-140 seat & about 325-350 open.
I feel you should be about 125/325 with that cam.

Let me edit this a bit, that spring would be fine if the installed height were 1.850 ;)

99893-16 are the same springs used on my cam 288/296F10 installed at 1.850 will give you 130 lbs on the seat.

Originally posted by JRS70LS5:
99893-16 are the same springs used on my cam 288/296F10 installed at 1.850 will give you 130 lbs on the seat. I thought that was what I said
The seat height givin in the post was 1.750" :D

DeeBoo.

Everyone is right, 130 lbs is just fine. Don't go over 140 lbs---That will control it up to around 7500!, and break the cam in with the outers only.

UDHarold