Proform Pedestal Mount 1.7rr Questions

jdemolet · May 7, 2014

i plan on throwing proform 1.7 rr pedestal mount on my 89 5.0. will these work with trick flo valve spring will they work with ford racing replacement pushrods or will i need custom pushrods and should i replace my hydraulic lifters while i am at it

jdemolet · May 7, 2014

plus im also doing a intake manifold tb and spacer cai and maf should i also upgrade to 24 injectors or is that not necessary

stykthyn · May 7, 2014

get rid of those pro-form rockers. they are notorious for breaking....badly. Sounds like you are pretty new at this and all your questions need more info before they can be answered. give us a run down on your entire engine set up.

Dave2000GT · May 7, 2014

Agree get some Crane 1.7 pedestal rockers they are simple to install and won't break.

jdemolet · May 7, 2014

Will the 1.7 crane roller rockers work with factory length pushrods. My setup is going to be upper and lower manifold maf tb poweripe valve springs rrs pushrods and lifters

jAEded · May 7, 2014

Stock pushrods worked in my setup on a 93. The Crane set also comes with shims if you're running shaved heads. Still a good idea to check the lash.

jdemolet · May 7, 2014

I read this thing can't remember where they put 1.7 crane rrs and tightened them down till they couldn't spin the pushrods and they said that was zero lash

jAEded · May 7, 2014

Once the lifters bleed down you can spin them anyways. With the pedestals you need to torque them all the way. The adjustment is with shims under the pedestal. I still did the procedure the same as studs, but my adjustment range is more limited cause of the shims.

jAEded · May 7, 2014

jdemolet said:
I read this thing can't remember where they put 1.7 crane rrs and tightened them down till they couldn't spin the pushrods and they said that was zero lash

On the cam base circle for whatever valve I was working on. With the lifters pumped up. I would tighten the 5/16 bolt until I felt resistance while spinning the pushrod. From there I would torque the bolt to only 8 or 12 foot pounds with a beam torque wrench. See how far it turned from zero lash. Anywhere from 1/4 to 1 turn, whatever. I think I shot for between 1/2 and 3/4 turns. Add or remove shims to achieve it.

I only went to 8 or 10 foot pounds for the measurement because once the bolt and pedestal are seated it doesn't matter how tight you torque it. If I tried to torque it to 30 ft-lbs and it takes 2 turns, it doesn't matter because everything was already seated at 1/2 turn, as an example. Beyond that is just stretching the bolt and it doesn't factor in to your measurement. I hope that makes sense.

The place you read was correct. Zero lash is the point at which there is no play in your valvetrain. The point you feel resistance on the pushrod, or it stops turning.

mikestang63 · May 7, 2014

Ok, i'll bite...

Stock cam? heads? Tb? MAF? How many miles on the valve springs and are they stock. Increase the lift on a set of worn or high mile stock springs and you will get things like binding, breakage, or worse PTV boomage.

Why are you installing 1.7 RR with stock heads. waste of time and money IMO. Wait until you can afford some better heads, then you pick the cam and build the motor around that- choose the heads, springs intake, TB, injectors, etc.

Pushrod length is determined by the heads, cam, rockers, head gasket, and a host of other variables. On pedestal mount rockers, often shims are needs to achieve proper preload. Follow the manufacturer recommendation for proper preload and torque.

You are way far away from needing more injectors.

v8only · May 7, 2014

when my friends pro form rocker went south, it slipped off, got a chunk gnawed off by the valve spring, sent metal shaving through his entire 347, destroyed the block...cylinder walls, crankshaft, everything was scratched and destroyed...Don't cut corners when building a car.

jdemolet · May 8, 2014

Decided I'm going to put heads on it. Just can't decide between gt40p or flo tek. Never really heard of them wanted some opinions on heads

stykthyn · May 8, 2014

flo tek is also chinese made crap just like those proform rockers. IMHO a gt40/p top end is THE best budget mod out there. Assuming you can pull it yourself you can put the whole package together for 500 or less and it will give you an extra 40-60hp over the stock fox set up.

jAEded · May 8, 2014

v8only said:
Don't cut corners when building a car.

Amen to that.

jdemolet · May 8, 2014

how about dart iron eagle heads. how would those be with the stock bottom end and cam

jdemolet · May 8, 2014

What about the power heads ported e7 heads they any good

mikestang63 · May 8, 2014

jdemolet said:
What about the power heads ported e7 heads they any good

You are better off with a set of Explorer heads and new springs. Save your money for when you get a good set of heads.

jdemolet · May 9, 2014

ive checked my local junkyards they want to much for explorer heads that are not in the best of shape

mikestang63 · May 9, 2014

jdemolet said:
ive checked my local junkyards they want to much for explorer heads that are not in the best of shape

I think Brian @Gearbanger 101 knows of a guy that sells them already assembled with decent springs for 3-400.

jdemolet · May 9, 2014

does that guy have a site where i could order

Proform Pedestal Mount 1.7rr Questions

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