CNC ported DOVE,D3,87-92 E.F.I.,RHS HEADS - 460 Ford Forum
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post #1 of 16 (permalink) Old 02-04-2013, 03:45 PM Thread Starter
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CNC ported DOVE,D3,87-92 E.F.I.,RHS HEADS

We have developed CNC ports for these cast iron heads.if you want to save some $$$ with stock ported heads and still make respectable power than this might be your answer.they range in flow from 340-375 cfm intake and 220-250 exh.with 290cc port volume.they have 2.250/1.760 valve sizes. we even built a 518 stroker to test them on. It made 702-724 HP @6000 rpm.and 684 torque@4500,note to shabby for stock ported heads that look stock from the outside.you can send us your heads and get just the cnc ports cut for 750.00 per pair or we can finnish them with bronze guides and 3 angle radiused valve job and milled flat for 1195.00.So if you want to soup up your stroker for less $$,just let us know we will make it happen.check out mudslinger 518 at youtube,or foxlakeracing.com,thanks,ron
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post #2 of 16 (permalink) Old 02-04-2013, 06:05 PM
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what do you mean when you say you developed a CNC port for these stock heads? are you completely producing new heads like the stocks or are you having some kind of machine doing all the porting.

sorry if this sounds dumb, but i can't picture what you mean.
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post #3 of 16 (permalink) Old 02-04-2013, 06:24 PM
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CNC ported DOVE,D3,87-92 E.F.I.,RHS HEADS

I believe he means he has a computerized program to do all the port work on the cylinder heads that'll save money compared to manual porting.



Ron,
Do you guys have a CNC program for the cast iron CJ/SCJ d0Oe-R heads yet?
if so what kind of flow numbers are you producing?

thanks court


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post #4 of 16 (permalink) Old 02-04-2013, 06:30 PM
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that sounds freakin awesome!
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post #5 of 16 (permalink) Old 02-04-2013, 06:48 PM
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Quote:
Originally Posted by RonRobart View Post
We have developed CNC ports for these cast iron heads.if you want to save some $$$ with stock ported heads and still make respectable power than this might be your answer.they range in flow from 340-375 cfm intake and 220-250 exh.with 290cc port volume.they have 2.250/1.760 valve sizes. we even built a 518 stroker to test them on. It made 702-724 HP @6000 rpm.and 684 torque@4500,note to shabby for stock ported heads that look stock from the outside.you can send us your heads and get just the cnc ports cut for 750.00 per pair or we can finnish them with bronze guides and 3 angle radiused valve job and milled flat for 1195.00.So if you want to soup up your stroker for less $$,just let us know we will make it happen.check out mudslinger 518 at youtube,or foxlakeracing.com,thanks,ron
Have you developed any D00E-R ports or built any engines similar to the 518 with D00E-R heads?
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post #6 of 16 (permalink) Old 02-04-2013, 09:16 PM
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Those flow #'s look awesome for a set of old heads, but $21,000 for that motor? Thats insane

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post #7 of 16 (permalink) Old 02-04-2013, 11:18 PM
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I'm wanting to look at the iron RHS BBF heads that are talked about on your website.

Bret

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post #8 of 16 (permalink) Old 02-05-2013, 09:18 AM
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I'm wanting to look at the iron RHS BBF heads that are talked about on your website.

Bret
I don't know what is talked about on their site however, RHS used to have iron F.I. replacement heads both E8 and F3 but, they sold the tooling to EngineQuest.

Air flow of 250 on the exhaust side even with braze filling and using a tube would be astronomical.

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post #9 of 16 (permalink) Old 02-05-2013, 09:28 AM Thread Starter
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These are a stock EFI replacement head RHS made for a couple of years.its way thicker than the stock piece.lots of room for porting.the only issue is we have to make adapter plates to get a carb. style intake to bolt on.thats what we did on the 518.they do flow 375/250 with pipe,thats what made 724hp on the 518.

Last edited by RonRobart; 02-05-2013 at 09:32 AM. Reason: had to add some text
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post #10 of 16 (permalink) Old 02-05-2013, 09:36 AM Thread Starter
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so far we take a stock iron 429/460 head and cnc port it cut a bigger valve job,leave the chamber as cast[usually around 72cc dove head or 95cc for D3 head]no welding required.
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post #11 of 16 (permalink) Old 02-05-2013, 10:09 AM
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CNC ported DOVE,D3,87-92 E.F.I.,RHS HEADS

Quote:
Originally Posted by RonRobart View Post
so far we take a stock iron 429/460 head and cnc port it cut a bigger valve job,leave the chamber as cast[usually around 72cc dove head or 95cc for D3 head]no welding required.
so you guys currently do not have a CNC program for the d00e-r cylinder heads? do you guys expect to have one in the near future, if so when?

thanks


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post #12 of 16 (permalink) Old 02-05-2013, 10:47 AM Thread Starter
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We can make one,but those heads are so big already I figured if we make the cross section much bigger the torque will really suffer.not to mention those heads are kinda rare$$$.thats why I spent time on the other heads smaller cross section with good flow will make a wide powerband.but if enough guys want it done we can do it.I basically made the DO,D3,and EFI heads for the inbetween stock and exspensive alum. heads.
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post #13 of 16 (permalink) Old 02-05-2013, 11:54 AM
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Flow

So do you have the flow numbers without the pipe to get a good comparison ?

Thanks Mark
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post #14 of 16 (permalink) Old 02-05-2013, 12:08 PM Thread Starter
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its usually 15 cfm less on the top number,then gradually less diff. at lower lifts.
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post #15 of 16 (permalink) Old 02-05-2013, 09:26 PM
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Quote:
Originally Posted by RonRobart View Post
so far we take a stock iron 429/460 head and cnc port it cut a bigger valve job,leave the chamber as cast[usually around 72cc dove head or 95cc for D3 head]no welding required.
Confused: Do you still have/use the new EFI castings or is the program run on old factory heads? Do the new castings have a modern chamber or bathtub?
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