1.7rr on stock long block?

stanglover0526

New Member

Mar 1, 2009

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missouri

Jan 15, 2010

#1

• Jan 15, 2010

• #1

i just picked up my new project a 91 gt and its completely stock. I dont know much about 5.0s as ive had the 4.6s. My buddy gave me a set of crane 1.7 rr and i tried installing them last night and the bolt was just a little to big for my stock head. Could i go to the hardware store and get some grade 8 bolts that are the rite size? Or is there something special about the bolts that came with them? Any help is greatly appriciated!

 

apollo12

New Member

Dec 11, 2007

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port st.lucie fla

Jan 15, 2010

#2

• Jan 15, 2010

• #2

Did he give you all the hardware or just the roller rockers? If not you will need to order the crane kit to install the rockers

 

stanglover0526

New Member

Mar 1, 2009

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missouri

Jan 15, 2010

#3

• Jan 15, 2010

• #3

yes he gave me all the hardware its just that the bolts dont thread into my stock heads

 

stykthyn

I want to measure mine. It doesn't look that tall.

15 Year Member

Jul 6, 2006

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gainesville

Jan 15, 2010

#4

• Jan 15, 2010

• #4

are they pedestal mounts or shaft style?

 

stanglover0526

New Member

Mar 1, 2009

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missouri

Jan 15, 2010

#5

• Jan 15, 2010

• #5

they are pedestal mount i beleive they are original 93 cobra rockers

 

SpartaPerformance

10 Year Member

Nov 5, 2006

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Long Island NY

Jan 15, 2010

#6

• Jan 15, 2010

• #6

I don't think those would fit on a stock head, the Cobras had GT-40's

 

Chrome_Rust

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Dec 5, 2008

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Findlay, Ohio

Jan 15, 2010

#7

• Jan 15, 2010

• #7

i had 1.7's on e7's in my first engine that was in the 93. i bought some different bolts and they went right on no problem.

 

stanglover0526

New Member

Mar 1, 2009

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missouri

Jan 16, 2010

#8

• Jan 16, 2010

• #8

did you notice any chance with rockers on the stock heads? People say it can float the valves. What harm can this cause?

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,248

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Massachusetts

Jan 16, 2010

#9

• Jan 16, 2010

• #9

You are prob not gonna notice a thing with stock heads and intake and cam.

If your springs are original and 100K, putting on a 1.72 might increase the chance of floating a valve.

Honestly, i'd either mothball them til you get more mods...or sell them to finance better mods. 1.72's aren't a typical mod for stock 5.0's.

 

Chrome_Rust

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Dec 5, 2008

530

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Findlay, Ohio

Jan 16, 2010

#10

• Jan 16, 2010

• #10

my valves started floating aroung 5800.... I didn't care as I was changing the engine anyway. I shifted that car when it stopped pulling. Upon tear down I had ringlands in 4 cylinders that were destroyed....