Indy 452 Heads and MP cam

[m300b]

Stock build 383. Indy 452 reconditioned heads.

MP P4452783 cam.
Are the dual springs too much for this cam on break-in?

 

[pnora]

Stock build 383. Indy 452 reconditioned heads.
View attachment 1821599
MP P4452783 cam.
Are the dual springs too much for this cam on break-in?

That ad must be from 30 years ago.

 

[m300b]

I bought the heads in 2004. Finally putting the motor together.

 

[RemCharger]

Post the cam specs.
Generally it's always advised to remove the inner spring on break in.
My question would be whether the dual springs are necessary on a street cruiser

 

[Cranky]

Thought I was bad about 'life getting in the way' of doing stuff lol. I don't have the cam numbers handy....but even with a 509, with today's oils, it's best to break in with say a stock single spring imo.

I bought the heads in 2004. Finally putting the motor together.

 

[m300b]

Duration 268-284
Overlap --
Design lift @ valve.450/.464
Install centerline 113
Valve lash Int & Exh zero
Recommended spring P3690933 (also a dual spring)

 

[RemCharger]

Duration 268-284
Overlap --
Design lift @ valve.450/.464
Install centerline 113
Valve lash Int & Exh zero
Recommended spring P3690933 (also a dual spring)
View attachment 1821629

Aha! OK, you're good. That's a single spring with damper. Street hemi spring iirc

 

[m300b]

Thanks guys!

 

[Cranky]

Aha! OK, you're good. That's a single spring with damper. Street hemi spring iirc

IIRC, the 933 is a main spring with a flat damper in it.....?