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Join Date: Sep 2007
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cmw heads

Hello
Have any of you heard of CMW Billit cylinders heads? Are they worth the money? Building a 500hp motor CMW claims there heads are the only way to go and the stock 3.3l heads are inferior? Just wondering if anyone is running them. thanks
Old 10-01-2007, 05:58 PM
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i asked this same question about a year ago... I was advised not to..... use the search function and you can locate the post....
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Brad...930 gt-1 racecar, increased displacement to 3.6L, JB racing Cylinders, JE 8 to1 pistons, stroked crank, Carrillo rods, extrudehoned 3.2L intake, full bay Bell I/C, GT-2 EVO cams, Rarly8 headers, GTX-35RS turbo, twin plug, P&P heads, Link G4 EFi system, G-50/50 with LTD slip and oil squirters/oil cooler, zork tube, full race coilover system, with carbon fiber body, full cage, E-85 sippin drunk
Old 10-01-2007, 08:30 PM
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I saw that same post, they seem like nice pieces. But I think the same money into 930 heads would get you a lot further.

I have drooled over the CMW heads, but without real proof, I cant say they are better
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86' 930/GT-40R Sold
94' Rustang GT daily (long gone)
2008 C6/Z51 Corvette
Old 10-02-2007, 09:29 PM
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still do not have any data
I have a set I am putting on my motor which will hopefully start being built in the next 2-3 weeks (once my friend is done with that pesky f-40)
He put a set in another 3.3T but we have yet to dyno the car
will try and document rebuild and get #'s as soon as possible
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Old 10-03-2007, 12:35 PM
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Please do John. Many of us have been on the fence for sometime. Another Pelican (name I can't recall at this time) is also doing a build up with these. I've talked to the guys at CMW and have been impressed with the hype and obviously much more affordable than 9meister's at these exchange rates.

The Photos of the fast CnC work has held me back along with some advice from reputable builders on this site. $6k for more power, not bad.......$6k for a crap pile of Al, not good.....

Please let us follow along on your build.

Thanks
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Luke S.
72 RS spirit 2.7mfi, 73 3.2 Hotrod on steelies, 76 993 3.3efi TT, 86 trackrat, 91 C4s widebody,02 OLA winning 6GT2, 07 997TT, 72 914 v803996TT
Old 10-03-2007, 04:45 PM
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I agree, their bit speed must be slowed down on their CNC machine.
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86' 930/GT-40R Sold
94' Rustang GT daily (long gone)
2008 C6/Z51 Corvette
Old 10-03-2007, 07:49 PM
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What speed are you guys talking about with the cnc?

Can you explain to a Noob please?

TIA
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.

1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.

http://www.danasoft.com/sig/Iamnotanumber.jpg
Old 10-06-2007, 12:46 AM
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Quote:
Originally Posted by NathanUK View Post
What speed are you guys talking about with the cnc?

Can you explain to a Noob please?

TIA

Nathan, When you use a CNC machine, you can set the tool speed ( the speed that the bit it travelling itself) as well as the feed speed ( how fast the tool moves around a part). If it is too fast, such as trying to rush a part to get more done in a certain time, the finish will not be as good, and you also intruduce chatter into the equation. Basically what you end up with is not a smooth finish.....
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Brad...930 gt-1 racecar, increased displacement to 3.6L, JB racing Cylinders, JE 8 to1 pistons, stroked crank, Carrillo rods, extrudehoned 3.2L intake, full bay Bell I/C, GT-2 EVO cams, Rarly8 headers, GTX-35RS turbo, twin plug, P&P heads, Link G4 EFi system, G-50/50 with LTD slip and oil squirters/oil cooler, zork tube, full race coilover system, with carbon fiber body, full cage, E-85 sippin drunk
Old 10-06-2007, 04:47 AM
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Ahh, makes sense, thanks.

On heads, apart from the sealing surfaces that shoudn't matter too much?
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.

1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.

http://www.danasoft.com/sig/Iamnotanumber.jpg
Old 10-06-2007, 01:24 PM
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yea, in a way.... In the ports, I would not want the chatter marks and left over marks from not going slow. But the real reason is I expect perfection for that sort of pocket change. If i am going to throw that much money at a company for their product.. it WILL be perfect.. or no dice...
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Brad...930 gt-1 racecar, increased displacement to 3.6L, JB racing Cylinders, JE 8 to1 pistons, stroked crank, Carrillo rods, extrudehoned 3.2L intake, full bay Bell I/C, GT-2 EVO cams, Rarly8 headers, GTX-35RS turbo, twin plug, P&P heads, Link G4 EFi system, G-50/50 with LTD slip and oil squirters/oil cooler, zork tube, full race coilover system, with carbon fiber body, full cage, E-85 sippin drunk
Old 10-06-2007, 01:39 PM
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Are you saying they are $6K? Damn! Thats a lot of money!

Quote:
Originally Posted by Lukesportsman View Post

$6k for more power, not bad.......$6k for a crap pile of Al, not good.....



Thanks
Old 10-06-2007, 04:02 PM
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Depending on the state you get the heads +/- a grand, but yes they aren't low buck. They also are listed with good components. Take into account that the last quote I got from a respected member on this board for "race" heads from useable to perfection would be about $4200. Once you realize this, then the price comes into perspective since that was quoted using MY cores.

9Meister, who arguably has the best heads on the market, after the exchange rate comes out to about $14k last time I checked. Now THAT is getting dicey for cars worth not much more than triple that figure.
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Luke S.
72 RS spirit 2.7mfi, 73 3.2 Hotrod on steelies, 76 993 3.3efi TT, 86 trackrat, 91 C4s widebody,02 OLA winning 6GT2, 07 997TT, 72 914 v803996TT
Old 10-06-2007, 04:36 PM
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I bought my 930 knowing it was a car that stretched the limits of my $$$
I also consider it the ultimate car with unlimited potential
I have been buying pieces for the car as I saved the money (or when there was a good deal on a 0% credit card)
I bought my heads a few years ago when cmw was having a "sale" (tooling up to do a big production run)
I paid 3k for the heads complete, although it took over a year to recieve the parts
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john bradshaw
comscc.com
porsche 930rs
SPA #227
Old 10-08-2007, 05:29 AM
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Quote:
Originally Posted by jrottn View Post
.....

I paid 3k for the heads complete, although it took over a year to recieve the parts
I guess they used the slow speed bit on their CNC for you....
Old 10-08-2007, 04:16 PM
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