Harland Sharp 1.7 Rockers

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Oct 10, 2010 | 03:41 PM

#11

dodgeman2289

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Joined: May 2010

Posts: 633

Likes: 1

From: martin county/florida

Quote:

Originally Posted by Hahns5.2

I just did the calculations again, it's 0.027" more for a 5.2 and 0.025" for a 5.9.

Stock 5.9 lift at the valve is 0.410" and stock 5.2 lift at the valve is 0.432".

y is the lift on the 5.2 higher? than the 5.9? and how much hp/torque increase will there be with these roller rockers?

Oct 10, 2010 | 07:50 PM

#12

mjonesjr

Thread Starter

Professional

Joined: Jul 2010

Posts: 224

Likes: 0

From: Salem, IN

Quote:

Originally Posted by Hahns5.2

Maurice, seeing the work you've done on your rigs over at TRS, these should be a cake walk for you to install.

Thanks.

I haven't yet decided if I want to get them or not since I probably will not be doing anything else to the motor except for new valve covers.

Oct 10, 2010 | 10:19 PM

#13

Hahns5.2

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Joined: Mar 2009

Posts: 2,181

Likes: 3

From: Battle Ground WA

Quote:

Originally Posted by dodgeman2289

y is the lift on the 5.2 higher? than the 5.9? and how much hp/torque increase will there be with these roller rockers?

No idea why the 5.2 has more lift.

IIRC, they've been dyno'd around 10hp+ at the wheels. I would certainly spend the money again.

Aug 20, 2013 | 11:15 AM

#14

winkie74

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Joined: Jan 2010

Posts: 193

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Anyone install these rockers and see no performance gain whatsoever? Or am I the only one?

Aug 20, 2013 | 04:52 PM

#15

ChillyPhil

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Joined: Sep 2011

Posts: 946

Likes: 1

From: Pennsylvania

I did a lot and don't notice too much power gain off anything. It could just be a 5.2l problem.

Aug 20, 2013 | 05:52 PM

#16

Johnn123

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Joined: Dec 2011

Posts: 1,530

Likes: 1

From: Lakefield, Ontario

Quote:

Originally Posted by winkie74

Anyone install these rockers and see no performance gain whatsoever? Or am I the only one?

Two year old thread dude... and you've already got one going on the subject as well...

Aug 21, 2013 | 12:07 PM

#17

Silver_Dodge

Grand Champion

Joined: Nov 2004

Posts: 6,099

Likes: 6

From: Colorado

This was one of the best upgrades I ever did on mine.

Aug 21, 2013 | 01:01 PM

#18

drewactual

Champion

Joined: Aug 2010

Posts: 2,697

Likes: 3

From: Cape Carteret NC

Quote:

Originally Posted by winkie74

Anyone install these rockers and see no performance gain whatsoever? Or am I the only one?

air in, air out... more air in doesn't mean more air out if there is an obstruction, though you'll be needing that air out to increase tq and hp... it's all about flow through the engine..

what kind of shape is your catalytic converter in? factory Y? chamber style muffler like a chokemaster?