ProComp poop ?

[Challenger340]

Anybody interested ?
We are currently "repairing" a set of Internet purchased "440 ProComp" Cylinder Heads, as a subcontract for another Shop.

You know the ones... the Chinese knock-offs of the Edelbrock Victor Heads ?
Geez,
I wonder how the heck those industrious little basterds got so interested in Cylinder Heads.... that they would acquire some supposedly "American Made" Eddy Victors... then FLY a set back to China... go to all the trouble to reverse engineer a copy of a head.... for an Engine they never knew even existed, little-lown been out of production for  45 years, then re-cast them, and market them over here, and as a competitor to, the supposedly "made in America" Edelbrock Victor Head ?

Doesn't anybody here.... "pluck" on Edelbrocks "Made in America" claims ? as maybe "made".... means "partially machined only"
WHY....
Has Edelbrock not sued ?

The Heads are most certainly IDENTICAL to the Edelbrock Victor.... except for.... "Machining" and 1 frost plug ?
Just my thoughts...
Edelbrock's "Made in America" is a play on words !

[Ghoste]

Could it be that some of this is only recently coming to light?  Edelbrock went to great lengths to promote their "Made in America" reputation with glossy catalogs showing photos of the happy workers building stuff and the patriotic theme to all of their promotional materials.  I never thought to give it a closer look. 

[heyoldguy]

Never had the opportunity to check the big block head. Have the small block ones here to use on a 426/360 build. They look good at first glance.

The owner of a BB Chevy dropped it off here to dyno with the ProComp 360 heads on it. Did a little testing prior to the dyno runs. We had 90% leakdown in one cylinder with the OOTB valve job. Took the heads off to do the repairs and discovered the rocker stud holes were machined off so far there was no way to correct the geometry........well, short of custom rockers/ratios and moving the pushrod holes .120". There wasn't enough meat in the pedestals to relocate the stud holes without welding up the pedestals. One of those times where the whole package was so bad you just return the parts to the customer and tell him he needs to start over.

But to Edelbrock, I firmly believe they are cast and machined in California. Know a reputable person who has been to the foundry and machine shop.

[Cooter]

Anybody interested ?
We are currently "repairing" a set of Internet purchased "440 ProComp" Cylinder Heads, as a subcontract for another Shop.

You know the ones... the Chinese knock-offs of the Edelbrock Victor Heads ?
Geez,
I wonder how the heck those industrious little basterds got so interested in Cylinder Heads.... that they would acquire some supposedly "American Made" Eddy Victors... then FLY a set back to China... go to all the trouble to reverse engineer a copy of a head.... for an Engine they never knew even existed, little-lown been out of production for  45 years, then re-cast them, and market them over here, and as a competitor to, the supposedly "made in America" Edelbrock Victor Head ?

Doesn't anybody here.... "pluck" on Edelbrocks "Made in America" claims ? as maybe "made".... means "partially machined only"
WHY....
Has Edelbrock not sued ?

The Heads are most certainly IDENTICAL to the Edelbrock Victor.... except for.... "Machining" and 1 frost plug ?
Just my thoughts...
Edelbrock's "Made in America" is a play on words !

I agree. I don't think Eddy can keep up with the demand for cheaper race parts.
I also agree that sometimes, you get a sh*t part. Send it back, get another. Simple.
Made in America will only get you so far when it comes to your heads costing $1000.00 more.
after all, if this weren't true, 440Source wouldn't have made it past day two.

[Challenger340]

Never had the opportunity to check the big block head. Have the small block ones here to use on a 426/360 build. They look good at first glance.

The owner of a BB Chevy dropped it off here to dyno with the ProComp 360 heads on it. Did a little testing prior to the dyno runs. We had 90% leakdown in one cylinder with the OOTB valve job. Took the heads off to do the repairs and discovered the rocker stud holes were machined off so far there was no way to correct the geometry........well, short of custom rockers/ratios and moving the pushrod holes .120". There wasn't enough meat in the pedestals to relocate the stud holes without welding up the pedestals. One of those times where the whole package was so bad you just return the parts to the customer and tell him he needs to start over.

But to Edelbrock, I firmly believe they are cast and machined in California. Know a reputable person who has been to the foundry and machine shop.

Speaking of Rat Motor BB Chevy nightmares Jim...
I got one in here now.... some Oil Guys doing a Bonneville Land Speed record attempt... under 500" O.E.M. Block... EPD Larry Heads blah, blah.. whatever... with the Heads moved waaaay down each deck to cure the Good Port / Bad Port shrouding deal.... so much so... that by the time we had all the Head/Pushrod etc Bolt Holes Moved and corrected etc.... and custom Piston Molds CNC mapped &  built for the head offset... that now I gotta re-engineer a spot face on the Rocker Stud Angle to get shiat working... then custom stud girdle...phew ! ... Oh well... BY THE HOUR !

I have no doubt that Edelbrock do in fact cast some of their own stuff.... goes without saying, they do in fact have a Foundry.
But what percentage of TOTAL CASTINGS is done in house, versus outsourced, to be able to maintain the "Made in America" advertising under U.S. import/manufacturing/tariff duties/advertising laws is my question ?
I have heard that by law, as low as 30% of Castings done "in house" allows manufacturers to still use the "100% Made in U.S.A." moniker for advertising on all Castings.
It was a trade-off allowed by Congress to keep at least a "portion" of manufacturing/jobs in the U.S.A. for competitive reasons... so it ALL didn't go overseas.
I hope I am wrong....
but still does NOT explain these ProComps.... nor Edelbrocks lower priced lines like "E-Street", that are identical castings in many cases to the higher priced Performer RPM, with same Valve Sizes ? I just don't buy the "better valves" excuse.

[firefighter3931]

Edelbrocks lower priced lines like "E-Street", that are identical castings in many cases to the higher priced Performer RPM, with same Valve Sizes ? I just don't buy the "better valves" excuse.

Bob, it's not just the valves that are different ; the E-Street castings use a powdered metal valveseat while the RPM's use ductile iron. 

For the minimal price difference it's a no-brainer....get the RPM with better hardware and ductile seats. 

I've heard enough about the ProComp junk to know that i never want to mess with them 


Ron

[cudaken]

Pro Comp is not Comp Cams, correct?

Could it be a rename of the C.A.T. company that was selling junk roller rockers?

[Cooter]

Been running ProComp aluminum heads on a SB Chevy race motor (roundy-round) for over a year with no mms problems.
don't know bout the BB Mopar.