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Pro Comp BB Victor CNC heads #2446251
02/04/18 03:11 PM
02/04/18 03:11 PM
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This initial post will be pretty short, with other/more info to come along at a later date.

Someone bought these bare and sent them to me to have them looked over, corrected as necessary, and assembled with known quality parts.

I see a 265cc unported version and 325cc CNC ported version listed on ebag...... So I assume these are supposed to be the 325cc version.
I haven't cc'd one yet, but they don't look like they're going to be as big as 325cc's.
Especially if the unported ones are anywhere near 265cc, since there are several drop outs(areas the porting program didnt touch) in the port.
They are still std port opening on the intake side, and the exhaust opening appears pretty generous, measuring 1.790 x 1.395.
The current prices I see over on the bag for these heads are about $800pr bare/unported, $1500pr bare/CNC ported.

As with most Chinese heads I see, the valve job is "small", 2.10 O.D. for the intake valve, 1.72 O.D. for the exhaust, and both will benefit from the seats being recut and then having the new seat blended into the bowls.

However.......it's very likely someone will end up running some of them OOTB, so that's the place to start.
I have no idea if the assembled heads get any additional seat work compared to the bare heads, but if they don't...... This is essentially what you'd have.
I used some Indy 2.19/1.81 valves with no back cut for this first test.

Lift------in/ex
.100---70.4/56.5
.200--146.8/107.3
.300--211.6/152.5
.400--258.7/184.2
.500--288.7/203.0
.550--303.6/210.5
.600--314.1/215.4
.650--325.3/219.2
.700--331.7/221.8
.750--331.7/224.9

image.jpgimage.jpgimage.jpg

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Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2446292
02/04/18 04:09 PM
02/04/18 04:09 PM
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popcorn

Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2446298
02/04/18 04:19 PM
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That chamber looks nice. I don't know how well it works, but it does look nice.

Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2446342
02/04/18 05:23 PM
02/04/18 05:23 PM
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The part number on the Speedmaster box is pce218-1731, which is the CNC ported 325cc head.

Curiosity got to me, so I checked it...... 301cc(I actually thought it was going to be just under 300).
I don't know where the "325" comes from........why not just call it a "300"?
Maybe they figure the bigger number would sell better.


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Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2446346
02/04/18 05:27 PM
02/04/18 05:27 PM
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The Chinese aren't very good at measuring things.....

Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2446358
02/04/18 05:43 PM
02/04/18 05:43 PM
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BradH made this comment about 4 years ago regarding the PC CNC ported version of these heads:
Quote:
I know what they're advertised to flow, but I wonder what they really flow.


I haven't seen the advertised numbers...... Care to post them?


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Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2446498
02/04/18 09:05 PM
02/04/18 09:05 PM
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I'll see what I can dig up. The #s I saw were for their earlier CNC option, and the pics I saw of that version had LOT of untouched casting in both the ports & chamber. IIRC, the advertised #s at that time were similar to the Hughes CNC std port -- 350-ish -- and for the amount of work done on the head I saw, that wasn't even close to realistic.

Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2446503
02/04/18 09:11 PM
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There’s a fair amount of untouched material on these heads as well.

The numbers on the Stan Weiss site look pretty optimistic.


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Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2446559
02/04/18 11:07 PM
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From a 2012 Procomp catalog listed as 285 cc CNC intakes, 2.20 & 1.81 valves, and 72 cc chambers:

.100 - 69.3 / 57.4
.200 - 147.5 / 116.8
.300 - 217.8 / 159.0
.400 - 278.3 / 211.8
.500 - 319.7 / 241.6
.600 - 343.9 / 269.0
.700 - 357.2 / 287.7
.800 - 364.5 / 299.8

No specs provided on bore size used or size of exhaust pipe extension, either.

Your hand-port work on the intakes of my Procomp casting resulted in #s pretty close to those claimed #s above.

Re: Pro Comp BB Victor CNC heads [Re: AndyF] #2446561
02/04/18 11:10 PM
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Originally Posted By AndyF
That chamber looks nice. I don't know how well it works, but it does look nice.

"Dude! Where's my quench pad?!"

Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2446626
02/05/18 01:41 AM
02/05/18 01:41 AM
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The spark plug side of the chamber is decent, but the other side looks like it leaves a little to be desired from a pressure recovery standpoint.
That's not the fault of the cnc job though...... The chambers are cast pretty much just like that.

The 2012 version is listed as 285cc and flows 360+, the 2018 version is listed as 325cc, but is really only 301cc...... And flows 330.
I wonder if that's considered "new and improved"?

I can't imagine you could use a flow tube/pipe big enough to get that ex port to flow 299.


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Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2446902
02/05/18 03:45 PM
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I'd be shocked if the CNC 285 heads that I saw would have made 330, regardless of the advertised #s.

Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2446966
02/05/18 05:53 PM
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Brad, have you ever cc'd either an ootb Victor or PC Victor?
I'm curious as to how close they actually are to their 280 and 265 published figures.

These 301cc PC heads I have here certainly don't look like they've had 36cc's worth of material removed from them.


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Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2447000
02/05/18 07:00 PM
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You provided me some measurements on my Victors: the stock head with the Edelbrock valve job was 276 cc; the same runner on the ported head along with the different valve job was 294. You said there was probably 20 cc of additional runner volume, less maybe 2 cc for the valve having been lowered some with the new seat config. And those heads are 325 at .500, 340+ at .600, and 350 at .700.

Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2447052
02/05/18 08:31 PM
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I couldn't recall if I'd cc'd an ootb runner or not.

Apparently I did.

If that head was 276, then the earlier version std port head(before the bowls became ridiculously small) was probably pretty close to 280cc.

I don't see the PC head being 11cc smaller...... But it could be.


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Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2463889
03/09/18 06:31 PM
03/09/18 06:31 PM
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Well, I've finally had a chance to get back to these heads.

I knew putting a proper valve job on these heads would perk up the flow, but this might be the biggest gain I've ever seen from recutting some seats and a little blending.

With the ootb numbers being what I would only consider so-so, I didn't really feel like you were getting your money's worth out of the cnc job.
After cutting the seats and blending, I think it's clear....... It's going to be the most cost effective way to use these heads if you were looking for 340cfm+ flow values.

The valves going in these heads are Manley 2.19 intake and Ferrea 1.81 exhaust, and both had a small back cut for this test.

All that's done between this test and the first is recutting the seats, and then blending the valve job into the bowl and short turn...... And the new valves.
Same head/same cyl as the first test.......
28", 4.375 bore, no tube on ex-

Lift------I/E
.100---73.9/59.1
.200--153.6/120.7
.300--218.4/172.0
.400--270.0/206.4
.500--314.1/229.6
.550--328.0/245.7
.600--340.3/251.3
.650--348.5/255.1
.700--359.0/258.9
.750--351.6/262.7

Both ports are much smoother and quieter sounding after the rework.

It's better than I expected them to turn out.

Here are the ootb numbers again so you don't have to scroll back and forth:

Lift------in/ex
.100---70.4/56.5
.200--146.8/107.3
.300--211.6/152.5
.400--258.7/184.2
.500--288.7/203.0
.550--303.6/210.5
.600--314.1/215.4
.650--325.3/219.2
.700--331.7/221.8
.750--331.7/224.9


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Dealer for Comp Cams/Indy Heads
Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2463894
03/09/18 06:45 PM
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If you could share your take on the casting quality as well as the guides, heli coils?

Id not expect the casting or the guides to be much different on the small block heads.

Before they jacked them up I was getting the cnc casting for like 8 a pair and using good parts was under 1500. Ive run my street racer hard this past year but didnt see a reason to pull it down over the winter to check.

But on a different low rpm build ive got nearly 8500 miles on a set and so far so good.

Clearly not the cream of the crop but it seems to be they are better then they used to be.

In your opinion would you use a preped set over an old iron head?

Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2463926
03/09/18 07:39 PM
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I guess I never paid any attention to these heads, first time I really ever noticed them was around black friday. They had them on eBay for stupid cheap. I was like what is this junk??? I searched them and was a bunch of old not so good reviews. Then I remembered them.

Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2463934
03/09/18 07:48 PM
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Looks like you ended up with a decent set of heads after all the work. But of course, they are still Victor heads with the offset rocker arms and oddball valley plate and stuff like that. So I'm thinking a set of Trick Flow 270 heads would be a better deal if a guy was starting from scratch?

Re: Pro Comp BB Victor CNC heads [Re: fast68plymouth] #2463974
03/09/18 08:41 PM
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These are still std port window, and are easily the cheapest way I can think of to get to 350cfm with that sized opening.
If you have a combo where you feel that's advantageous....... These are probably a good option.

Hughes and T&D have rockers, and I don't think the cost is much different between these or the non-offset options.

To buy the bare heads(assuming the cnc version is around $1500/pr bare), some quality parts, and do a little rework like these are getting....... You'd have a little more in them than ootb TF 240's....... But you'd also have higher flowing raised port heads.

How that would play out on a typical "hot street/strip 505"...... I feel like these could work pretty well.
For sure, these aren't going to displace the TF240's as the current "value leader" in the BBM head arena.
But it's nice to have choices.

There is plenty of meat for these to be ported to MW size........ I'm kinda surprised they don't offer that as one of the options.

Someone asked about QC........

I have no idea by looking at the guides if they have improved the quality of them from a few years ago.
Supposedly they have...... We won't know until they have some time on them.

The overall casting quality and finish seems fine. There are no heli-coils in anything, and several of the hand finishing/deburring operations look crudely done.
The deck finish was decent(but not as smooth as what I'd prefer for MLS gaskets), the guides needed sizing, and the valve seats really should be touched up(Not even taking into account the flow gain potential).

If I were still building motors and a customer wanted to try them on a build, I'd use 'em.




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