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Old 03-01-10, 02:35AM   #1
twinturrbo406
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Default CV-235 Intake Port

Well guys, there has been much progress down here in Fl, and i apologize for the lengthy delay, but we've just completed the development work on the new 235cc Intake Port for the CV-1's. This port will be the new entry level port for the as cast CV-1 head. It uses a 2.125 valve, which can be upgraded to a 2.150. We do not have results for that, but will soon.
The port shows good mid-lift flow production and has a very smooth sound to it on the bench. The velocity is 300fps+ and the vacuum scale is very stable at all lift points and shows no sign of tumble or eratic flow. The current CV-1 Single 4 Intake Manifold is being retooled to house this new port shape.
We are very close to finishing the shortblock of a 428 stock block build to dyno test the CV-235 heads. The 428 has billet main caps, BME rods, JE 2618 alloy pistons, and the J/E hellfire rings. The solid roller cam is being worked on currently for this combination. Both new versions of manifolds will be tested as well. BLP (Bo Laws Performance) will be providing all the carburation needs, and they will all be dominators. The manifolds will also be available with the 4150 flange.
This CV-235 is first of 5 new Intake Port shapes to be released for the CV-1, and 1 of the remaining four will be another as cast shape. So there are 2 new as cast shapes and 3 new CNC'd offerings. The CNC shapes are currently being worked with to finalize the shapes, and get them scanned for CNC production. As soon as those shapes are ready, that information will be released also.
And again, i apoligize for the delay, we are working day & night to get this stuff completed and on the dyno. We are very excited and look forward to testing the new heads & manifolds. We are also working on Roland Racing's new 4/7-3/2 cyl. swap camshafts.Std & Lrg. journal will be available. These are the new grinds that we'll be testing for the new CV-1 program. Which also includes the development and testing of our new LightWeight IPN Forged Crankshafts.
The cams & cranks will be available soon, and as soon as they are in my hands, pics will be posted. [indian]

Last edited by 7t2cv : 03-01-10 at 11:26AM.
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Old 03-01-10, 02:40AM   #2
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Default .......

....... here is the related flow test of the CV-235 port.......
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Old 03-01-10, 03:03AM   #3
TIN TIGR
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so this would be the "baby" port?..only 20 numbers down, with nice flows..nice work..banana man approves..[dance]
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Old 03-01-10, 03:39AM   #4
twinturrbo406
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Default CV-235 Pics ...

here are some current pics of the CV-235 ....
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Name:	235cc Intake Port Machined Seat 001.jpg
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Name:	235cc Intake Port Machined Seat 003.jpg
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ID:	21312  

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Old 03-01-10, 03:50AM   #5
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Default !!!!!!

[QUOTE=TIN TIGR;369321]so this would be the "baby" port?..only 20 numbers down, with nice flows..nice work..banana man approves..[dance][/QUOTE]

Hey !!! Baby port ?? I prefer "Wee-Man" [lmao][lmao][lmao]
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Old 03-01-10, 04:33AM   #6
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Nice!!!
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Old 03-01-10, 04:47AM   #7
TIN TIGR
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can you see a .450 lift cam pulling 300 cfm of air?..sounds like grandmas car, makes 600 plus hp..[dance]..quiet muffs..super sleeper....[dance]
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Old 03-01-10, 05:10AM   #8
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Default Go Granny Go !!!!!

[url]http://www.youtube.com/watch?v=SQMqgSaZZmM[/url] [dance][dance]
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Old 03-01-10, 10:46AM   #9
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That's going to be a mean 428, talk about making some low end torque. With the flow at low lift and fairly small runner volume this thing is going to fly on a small ci. The crazy thing is this is just the entry level cv head, wait til you guys see the other 4 ports!
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Old 03-01-10, 11:34AM   #10
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Hey Bill, you have a typo on your flow chart, its supposed to be 340.3@.700 lift
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Old 03-01-10, 03:36PM   #11
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Default ....

No, i made a calculation mistake when flowing the head. I corrected it last night. I was double checking my notes from the flow test, and saw .700 lift was wrong, i had written down 340, but it was supposed to be 343cfm. I wanna go back and work a couple areas, i think there is more mid-lift in the port, but i'm happy with what it does. I really don't wanna screw it up, lol. [rolleyes]
Yeah, the 428 should run well with this head. I'm excited. [indian]
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Old 03-01-10, 04:01PM   #12
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I put this info up on performance years as well
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Old 03-01-10, 06:36PM   #13
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At .600 and .700 lift the flow more the a standard set of ported E-heads, pretty impressive. Love the ,500 lift numbers AWESOME!

Hum, nice CV 235 port out of the box, that flows better then a ported E-head and will work on a 400...428..455 stock block.

Kind of puts them above both the Aluminum D-port and ported E-head.

Hum? I wonder what the next three will bring.
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Old 03-01-10, 07:25PM   #14
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Like stated this will be offered as an as cast head, the runner volume is 233 cc but will end up around 235 or near there when cast. You will have to ask Bill the CSA.
The 340 cfm eheads have a couple different runner volumes, the best of the 340 eheads have a 247 cc runner. I cant find specs on the flow numbers for the 340 eheads .100-.800 lift but they say 340-350 cfm@.700. Highports are more volume and less flow ..

Last edited by GREATGTO : 03-01-10 at 07:36PM.
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Old 03-01-10, 07:51PM   #15
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So are these going to be available as the same 'as cast' price as is offered now or more?

I may pass on the SD KRE 310cfm D-ports for these if the price is right. Too many options out there now, hard to make a decision.
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Have not run with the KRE heads yet, excited to hopefully give it a go this summer!!
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