These look pretty nice. I'm glad I am switched over to chevy sized rods because they and Fords will probably hit the market first.


http://www.dragzine.com/features/pri-cov...-rethink-design

They look a bit heavier than an H.I would like to see a stress test pic to see where it gives.

A friend of mine showed me a pic of those couple days ago. Nice looking rods .

I like how they are suppose to control deflection better than an H beam. I can see how in the design.

Is it really that much more expensive to forge, machine, and finish a rod in the USA?

I think 90% of the aftermarket rods are outsourced over seas and that's sad.

Nice!

Quote
Everything is FEA tested and finished in the USA,” Gearhart concluded.


So where are they Forged ?

CH CH CH CHINEEEEEEEEEZZZZ

Boostline Rod Deflection Comparison

Interesting, but I'm curious about that deflection depiction. Is that representing the greatest deflection in normal use, or is that induced loading to indicate the stress areas when loaded in way to cause that what is depicted ie, what exactly are the loads causing the deflection? And we only see deflection on the greater axis, not the smallest? Additionally, at PRI I saw a few rods with a lightening hole centered just above the big end, this rod shows a V stiffener at same location.

in the pic, the numbers in the legend are too small for my eye focus to see, so i had to use the colors to just see the difference in bending areas. can someone tell me the values and the units of measure each color represent? thanks in advance !

I have raced since 1974 I have had dozens of race cars and race engines--I have built hundreds and hundreds of race engines
I have NEVER even spun a rod bearing---I have never slung a rod--I have raced hard with some of the cheapest stuff ever--ANY rod with a decent lighter piston will not fail--a stock rod with a light weight piston will not fail IF
You have tune up right--you do not exceed RPM by some stupid amount--
You KNOW how to drive a race engine
You put it together with reasonable care

99% of folks spend way too much $$ and worry about stuff that is never going to happen You have a better chance of seeing a BIGFOOT than slinging a rod so tell me.....
WHAT is it you see in that fancy colored faked up graph that makes you know you need that rod vs. something else??

Drag racers don't fail many parts
Circle trackers and for sure road racers do fail some parts because they are stressing the stuff 150% more than drag racers because they accelerate and decelerate again and again and again
But then again--the ones that know how to drive seem to bring it home every time with no issues

I race with the cranks that won't mag, the cracked blocks, the scuffed pistons, the flea market valve springs--all the parts my customers toss out so they can sleep better at night--I sleep well because my pillow is stuffed with all that $$LOOT I did not spend on parts that are not necessary

What we need in the Mopar world is a big block I bean stock replacement style of rod like the decades old--light weight-- Manley's for about $295 a set THEN we would be getting somewhere Lets demand something like that how about it?
ohh...the pretty colors duh///

Nice picture.
If you plan on submerging your running engine, that rod will save it for an extra .01 seconds before hydraulic lock rips the crank out.
The picture shows that a thick beam bends less than a thin beam with the same load. Wow, that never occurred to me...
Primary rod failure: bolts
Primary load: tension ATDC
Neither of these is helped by a heavier rod.

Rod design is much like lipstick: if you don't have something new, they'll buy from someone who does... or says so.

BTW: FEA doesn't design a superior product. It only tells you something useful about the product you already have.

Von mises mpa 0-150

I don't get it, the primary load is NOT causing the bending pictured, what is, and how important/significant is it compared to primary load?

It's compression, which certainly happens but generally as a result from bad tuning (too much nitrous) or accident (struck a valve).
Most failures are accelerating away from TDC on the exhaust stroke, where reciprocating weight (entire piston + upper rod half) pulls the rod bolts apart or stretches the pin eye, etc.
It's directly proportionate to recip weight, and (almost) to the RPM squared. 10% higher RPM = 21% higher inertial load, etc.

If its compression causing the deflection, why no indications of stress in the colored picture at the small or big ends?

FEA is weighted to show the worst (= overloaded) areas. If it were at rest the whole thing would be blue, if squashed it's all red. They did their homework in those sections.

I always like crabmans replies because to me they seem to make sense in the real world.

Im not breaking, K1, or Eagle H beams in my builds or the ones I do for others so why would I move to a better rod when the need has never been there for me as well as many others.

People say overbuild, but I think a properly prepared entry level H beam will surpass a oem blocks limit every time.

Not saying these are not nice, functional, or not up to the job.

Id like to see how they are a year or two from now, no company is exempt from failures or flaws.