Do I NEED guidplates?

T

tylerrocks

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Big Spring, TX

Nov 16, 2005

#1

• Nov 16, 2005

• #1

for use with roller rockers?

Tyler

 

Edbert

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Austin TX

Nov 16, 2005

#2

• Nov 16, 2005

• #2

The factory rail type rockers kept the pushrods in alignment, but the answer really depends on the cam, more radical profiles should have them to keep the pushrods from getting out of line at high RPM even with rail rockers. If you use them you must have hardened pushrods and screw-in studs too.

 

T

THX 138

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Los Angeles

Nov 16, 2005

#3

• Nov 16, 2005

• #3

you need guideplates or self aligning rockers or possibly pedistal mount rockers.

 

rbohm

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tucson,az

Nov 16, 2005

#4

• Nov 16, 2005

• #4

or an early set of heads with pushrods slots rather than holes.

 

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tylerrocks

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#5

• Nov 16, 2005

• #5

How about a GT-40p head. The rockers are pedistal mount. Not really gonna rev the engine that high, maybe to 6K every once and a while.

what do you think?
Tyler

 

T

THX 138

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#6

• Nov 16, 2005

• #6

tylerrocks said:

How about a GT-40p head. The rockers are pedistal mount. Not really gonna rev the engine that high, maybe to 6K every once and a while.

what do you think?
Tyler

Click to expand...

sorry I meant shaft mount not pedestal mount. I got my terms wrong.
here are some shaft mount ones

The pedistal mount still need guideplates or self aligning rocker tips or they will twist on their axis and fall off the valve.

 

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69Rcode_Mach1

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Apr 20, 2004

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Salt Lake City, Utah

Nov 16, 2005

#7

• Nov 16, 2005

• #7

I would go with the guideplates they are cheap insurance.

 

LMan

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Mom's basement

Nov 17, 2005

#8

• Nov 17, 2005

• #8

Dont eff up your entire motor for lack of guideplates. You knock a rocker off and drop a valve, and you will wish you had them then!

 

Dark Knight

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Chandler, Az.

Nov 17, 2005

#9

• Nov 17, 2005

• #9

the P heads use pedestal mount rockers, no need for guide plates. You DO need pedestal mount roller rockers though, unless you do a conversion to studs..

 

RFMustangGT

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Knoxville,TN

Nov 18, 2005

#10

• Nov 18, 2005

• #10

for how much they cost, why not? you wish you had them if you don't. just makes things much more stiffer.

 

Dark Knight

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Nov 18, 2005

#11

• Nov 18, 2005

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you cant use guide plates with pedestal mount rockers, no place to put 'em..
and the rockers cant go sideways unless they break..

 

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tylerrocks

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Nov 18, 2005

#12

• Nov 18, 2005

• #12

Ok then, no guidplates for pedistal mont rockers. Is this stangnet's final answer?
thanks
Tyler

 

T

THX 138

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Nov 18, 2005

#13

• Nov 18, 2005

• #13

Dark Knight said:

you cant use guide plates with pedestal mount rockers, no place to put 'em..
and the rockers cant go sideways unless they break..

Click to expand...

are you confusing pedistal with shaft mount like I did? I think they would need SOMETHING to keep them in place. the LT4 rockers are pedistal and they don't have guide plates but they have self aligning roller tips.
http://www.chevyhiperformance.com/techarticles/49083/

Do fords have arced seats like the LS1s to keep the pedestal in place?

 

SoCalCruising

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#14

• Nov 21, 2005

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If you get GT40Ps, call Central Coast Mustang (www.centralcoastmustang.net). They have a good price on ready-built heads. They also sell GT40P-specific headers for early models. They will be a good source of info for you on the heads and how to set them up. I do believe that they offer them converted to studs, plates and roller rockers (not pedestal-mount), as well as pedestal-mount.

 

R

Rapid

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Nov 21, 2005

#15

• Nov 21, 2005

• #15

tylerrocks said:

Ok then, no guidplates for pedistal mont rockers. Is this stangnet's final answer?
thanks
Tyler

Click to expand...

If you can "twist" the rocker on it's mount, use guide plates AND hardened push rods. If they are on a rail and can only pivot to open the valve, you might get away without.

 

T

tylerrocks

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#16

• Nov 21, 2005

• #16

But it wont hurt anything if i used them and dont need them right?

Tyler

 

6

67efivert

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lincolnton nc

Nov 22, 2005

#17

• Nov 22, 2005

• #17

stock gt40p heads dont need them nor have a place for them so u dont need them u just need pedestal mount rockers and the little channel that holds them in place like the stock rockers use

 

302 coupe

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Macon, Ga.

Nov 23, 2005

#18

• Nov 23, 2005

• #18

just to back up the others...pedestal mount heads do NOT need guideplates. If you had any idea what the pedestal mount stuff looked like, it would be obvious that the rocker cannot misalign itself with the valve. Some of you people need to know what you're talking about before giving an 'answer' to a question.

 

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tylerrocks

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Big Spring, TX

Nov 23, 2005

#19

• Nov 23, 2005

• #19

Thanks to all. I know what pedistal mount rockers looklike. I just dont know anything about guide plates except for thier intended pourpose.

Tyler

 

Dark Knight

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#20

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302 coupe said:

just to back up the others...pedestal mount heads do NOT need guideplates. If you had any idea what the pedestal mount stuff looked like, it would be obvious that the rocker cannot misalign itself with the valve. Some of you people need to know what you're talking about before giving an 'answer' to a question.

Click to expand...