aode08

just wondering guys with the 1.7 rollers, will I clear factory pisotns ok with factory cam and my 351 heads?



I have 1.6 rollers now, and was told the 1.7's may shift my powerband up and that is not desired by some, however it add a sweet .030 lift to yur cam

AdderMk2

on a .444 lift head you should be fine with 1.7 rockers, im running a .485 lift cam on 1.7;s

Twister

other than valve cover issues....you're fine

2 kwik

no one even asked with size valve is in the head so how can you say yes

and adding lift from rockers will not actually up your rpm range

aode08

1.94 intake , 18 something exhaust valves, 351 w 1971 DO0E heads, .039 compressed head gasket, id like to get a thicker one though since im blowing later

aode08

if your running a .485 cam with 1.7 rollers you have a .517 lift cam !



I hear for the streets, you should stay 224 duration and 500 lift what do you think, about my setup, I alos know a split grind that favors the exhaust works nice as well. and has that choppy idle


im assuming my duration does not change with the addition of new 1.7 rollers correct?? If so, this would maek them meaning less and a better cam necessary

Joel5.0

Suggest to check PtV....keep in mind that it's the overlap period that counts.....my 2¢.

AdderMk2

the stock cobra lift is .485, but thats with 1.7's so the cam has a small amount more lift then a stock GT cam, a GT cam with 1.7's will get you .471 lift.

You can go higer in duration than that without any issues. A stock cobra cam is 227° and it BARELY lopes

aode08

yeah thats what i thought, I figured I can at least get the 1.7 rollers and gain 30 hp, my machinist told me my stock cam is holding me back with my setup and I need to make it BREATHE, so Im assuming with my stock cam and some 1.7 rollers my duration and specs will be cobra?? correct?

91stang

what about with the stage 2 trick flow cam... the specs are as followed

TFS-51402001

Fair idle, good midrange power. 2,500-3,000 rpm stall converter or five-speed recommended.
Compression: 9.5:1 minimum


224°/232° duration

.339/.352 cam lift

.542/.563 valve lift with 1.6 rr's

112° lobe seperation

also i was going with the canfield heads made for the 5.0 and the specs are...

Camshafts up to .550 lift shouldn't require piston notching