Ironhead Andrews Pushrods Chromoly vs Aluminum

[spdtrux]

http://www.phatperformanceparts.com/...SHRODS&CartID=



Who is using them and whats your opinion.

I have a bent push rod so i'll be replacing them.

Whats the stock pushrods made of?

w/ a price difference less then $10 i'm Leaning towards the Chromoly.

[83XLX]

Stock pushrods are aluminum. Unless you're running a modded motor with stiff springs, I'd stick with aluminum - they are lighter and quieter.

[spdtrux]

well if running aluminum would you trust these?
there half the price as andrews looks like a guy just made them at home......

http://cgi.ebay.com/ebaymotors/New-A...#ht_2412wt_939

[Schutzhund]

As already posted stock are aluminum. So unless the valves have been modified should be O.K.. I would check the valves any way, because one could be hung up. that may be the reason you have a bent push rod. Just a thought.

[fdny37]

I use the chromoly on my stroker and I can't tell if there is any difference with noise, but then my stroker is very loud. But I will tell you this, they are .030" shorter and much easier to install then the longer aluminum ones. They are stronger and not much more money then the aluminum so why not run them.

[DR DICK]

my pros & cons on pushrods after replacing/using many different types.

stock-
cons: sometimes are bent, sometimes dont have the ball ends centered to the shaft.

bent, i think is how some got made. cause i use them with the ends cut off as
punches/drifts. super tough. the alum shaft is 7/16 solid stock. must be 2000
series alum. good stuff. never was able to bend them when beating on them.
doubt that they bend more in a bike than in my toolbox.

not centered ends are just that. not centered. sucks, but not that much.

pros: 7/16 dia. usually wont rub inside pushrod tube at rocker end.
alum shafts expand more than steel. helps control lash as motor heats up.

ball ends are second to none. they are drilled or releived in the center of ball. this
stops the crappy wear action at the rocker.

aftermarket alum-
cons: 1/2dia 6061 alu tubing. may rub inside tubes. creates leaks.
ball ends usually not as good as stock ones.
imo not as tough as stockers.

pros: way lighter. thats as serious plus.

chromemoly-
cons: dont expand as much as alum. will get more lash as motor gets hot.
loud.

pros: wont rub, even with the highest lift cams.
usually can be had "you cut them to length". gear heads like that.

[chevelle]

Manton Pushrod can supply or make any type of pushrod to what ever length you desire.
You want them as long as possible to keep adjuster as short as possible, this will keep them as strong as possible. My chromoly rods came out to be $11.00 each.

[Bobo]

Weight difference between Andrews Aluminum and Crane Chromemoly is about about 4 ounces. I have run stock, NHRS, and Andrews Aluminum. I prefer the aluminum as they are much quieter and have less harmonics. Crane claims their chromemoly are designed for less harmonics but I haven't run them yet. I don't like that the adjuster is so short. A real pain to adjust and I have to rotate the engine to tighten the adjuster.
I have the Cranes as backups incase the Andrews don't hold up. BTW, I have had a chromemoly snapped in two in the lower half of the rod, point is even they can break.