Ported Dart pro 1 pre platinum

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Carnut1
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Re: Ported Dart pro 1 pre platinum

Postby Carnut1 » Sat Feb 04, 2017 7:42 pm

0204171933.jpg
Not sure if this has been finalized but a nice feature for porters was added by David. Port mach numbers one of the secrets many big boys keep to themselves. Now even an electrician can come closer to a powerful design. I like that it includes peak hp and shift rpm.
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Re: Ported Dart pro 1 pre platinum

Postby Smoke ring » Sun Aug 13, 2017 12:30 pm

This thread is full of interesting info, thank you to Charlie for doing this and all who posted along the way with info. The exhaust valve shape change taking care of a problem area shows how you can tune a port with a valve, and sometimes save a headache or hitting water trying to fix an area. Good stuff and a long thread to read!

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Re: Ported Dart pro 1 pre platinum

Postby Carnut1 » Sun Aug 13, 2017 3:01 pm

I really need to finish these up after the 66 289 heads. I wonder how much info transfers? After recent wins and losses I bet I will look at these with different eyes.

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Re: Ported Dart pro 1 pre platinum

Postby MadBill » Sun Aug 13, 2017 7:54 pm

Wouldn't it be more relevant to base the Mach Number on the minimum port area? With the same MCSA, a long high-taper runner/port will have a significantly greater mean port area and thus by the chart a higher Mach # than a zero-taper one. :-k
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Re: Ported Dart pro 1 pre platinum

Postby Carnut1 » Mon Aug 14, 2017 5:29 am

I am not sure DV will read this or Stan but I will give my opinion. I agree with you that mcsa would be best to get the highest airspeed mach index. Why did they choose the average? Mcsa can be difficult to calc due to complex shape the other is valve seat and valve are a variable geometry which will have mcsa a good percentage of the intake stroke. Thanks, Charlie

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Re: Ported Dart pro 1 pre platinum

Postby Frankshaft » Mon Aug 14, 2017 9:26 am

I say, call them done, put together a nice short block, and go to the dyno, that's the next step. Theory and jiving numbers non stop won't take you to the next level until you put them on something and run them.

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Re: Ported Dart pro 1 pre platinum

Postby Carnut1 » Tue Aug 15, 2017 9:31 am

Frankshaft wrote:I say, call them done, put together a nice short block, and go to the dyno, that's the next step. Theory and jiving numbers non stop won't take you to the next level until you put them on something and run them.

Working on it Shaft, A return customer from Long Island is interested in them. Thanks, Charlie

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Re: Ported Dart pro 1 pre platinum

Postby S10LS2 » Tue Aug 15, 2017 8:54 pm

Any chance you can update these ported head threads? Either on the first post or somewhere on the last post, that is within the last few weeks? Like what is the final port volume measured, as well as the cfm numbers? It is a pain to go back 20 pages even 10 pages to get caught up on the improvements made. I do not think I have seen port measurement sizes as well as cfm measured very often. What is the final numbers on these heads without me searching the thread for them. Is what I am asking. Not knocking, just asking. Just read the next post of yours and read something about a customer on long island. Is this porting you do for your own engines, or is this a buisness that you charge customers for your porting services? One more question is , have you experimented with Gen3 and gen4 chevy Ls heads yet?

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Re: Ported Dart pro 1 pre platinum

Postby Carnut1 » Wed Aug 16, 2017 5:41 am

S10LS2 wrote:Any chance you can update these ported head threads? Either on the first post or somewhere on the last post, that is within the last few weeks? Like what is the final port volume measured, as well as the cfm numbers? It is a pain to go back 20 pages even 10 pages to get caught up on the improvements made. I do not think I have seen port measurement sizes as well as cfm measured very often. What is the final numbers on these heads without me searching the thread for them. Is what I am asking. Not knocking, just asking. Just read the next post of yours and read something about a customer on long island. Is this porting you do for your own engines, or is this a buisness that you charge customers for your porting services? One more question is , have you experimented with Gen3 and gen4 chevy Ls heads yet?



I usually just do heads for friends but I am starting to branch out. No gen 3 or 4 experience. Last time these were flowed about 320 cfm 240 cfm without a pipe and 248 cc intake port. If you read Chad's 380 thread I ran this head against Chad's cnc 205cc heads with velocity and port energy graphs. All the head specs are on the tech sheet posted. I needed a break from my 289 head nightmare and put one of these on the bench and tried the sonic on aluminum. Looks plenty thick still. Thanks, Charlie


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