[dukejoh]

I have been contemplating buying a set of the race-rite oval ports for my 496 but was wondering about the springs that come from brodix. The solid flat tappet/ hyd roller springs are good for .600 lift and my UD288/296f10 will be slightly over .600 after lash. Would I be better off buying a bare set of heads and letting a local shop set them up or does anyone have experience with how much over .600 lift I could get away with?? I know that you are never sure until you measure, but I thought somebody might have been in the same boat as I, since that is a popular cam used on this site.
Thanks
Caleb

 

[Bob West]

and How much HP improvement would they be over a set of 781's ?

 

[dukejoh]

Brodix claims 80hp over stock ovals, but they don't say if that means ovals with big valves and a little gasket matching and bowl work or just bare bones stock heads. These heads have been talked about a lot on here and after all the machine work on a set of 049/781's are completed I might as well save a few more hundred, save a lot of weight off the front, and pick up some additional hp on top of that.
Caleb

 

[Wolfplace]

I have been contemplating buying a set of the race-rite oval ports for my 496 but was wondering about the springs that come from brodix. The solid flat tappet/ hyd roller springs are good for .600 lift and my UD288/296f10 will be slightly over .600 after lash. Would I be better off buying a bare set of heads and letting a local shop set them up or does anyone have experience with how much over .600 lift I could get away with?? I know that you are never sure until you measure, but I thought somebody might have been in the same boat as I, since that is a popular cam used on this site.
Thanks
Caleb

=
Caleb,
The spring you are referring to is not for most flat tappet cams. It is 370lbs at .600
Brodix has a number of different springs at no extra charge.
To answer your question the standard hyd roller spring will handle about .700 lift without issue.

If you email me I can probably save you a dollar to two on the Brodix
heads