Can someone explain the dif between 1.6 & 1.7RR?

Eric94GTvert

Founding Member

May 13, 2002

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PA, Nazareth

Dec 9, 2003

#1

• Dec 9, 2003

• #1

I am guessing the 1.7's would open the valves a little more and for a little longer giving more HP?

Can someone explain when one would be better than the other?

 

S/CBlack95GT

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Apr 6, 2003

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Dec 9, 2003

#2

• Dec 9, 2003

• #2

The 1.7 ratio only opens the valve more, not longer.

 

GTPhreak

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Mar 16, 2000

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Dec 9, 2003

#3

• Dec 9, 2003

• #3

the fulcrum point is slightly different i believe is what changes the ratio

 

C

carbed84

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Jun 13, 2003

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Dec 9, 2003

#4

• Dec 9, 2003

• #4

i believe the ratio is the length of one side of the fulcrum compared to the length of the other side of the fulcrum. If u know your lift divide it by 1.6 and this is your cam lift or if u know you cam lift u just take it times 1.7. In other words take your cam lift times your rocker ratio to get the lift.

 

Eric94GTvert

Founding Member

May 13, 2002

596

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16

PA, Nazareth

Dec 9, 2003

#5

• Dec 9, 2003

• #5

So when would it be better to get 1.6's as opposed to 1.7's?

 

Y

yellow1995Cobra

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Dec 23, 2002

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Massachusetts

Dec 9, 2003

#6

• Dec 9, 2003

• #6

So when would it be better to get 1.6's as opposed to 1.7's?

Click to expand...

Depends on the cam.. Some are made for 1.6 rockers and some for 1.7's..

 

S/CBlack95GT

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Apr 6, 2003

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Dec 9, 2003

#7

• Dec 9, 2003

• #7

Chopped Liver said:

So when would it be better to get 1.6's as opposed to 1.7's?

Click to expand...

It just depends on how much lift you want. For example the E303 cam has a lift of .498 with 1.6 rockers. Well you could install 1.7 rockers and get a lift of .529.

 

final5-0

Mustang Master

Apr 6, 2003

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DFW Texas

Dec 9, 2003

#8

• Dec 9, 2003

• #8

Eric

I did not see heads in your sig.

If you upgrade your heads you might want stud rr's to go with them.

More cam options with the 1.6's.

If your considering these rr's for E7's they most likely would be ped mount.

Would these rr's work in the future or would you have to buy another set.

One last thing, don't expect but a few hp from rr's.

Just my .02

Later
Grady