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4V inlet ports, plates or weld em? 

 

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 Post subject: 4V inlet ports, plates or weld em?
Posted: Fri Nov 11, 2005 1:57 am 
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Hey there I just found some more pics of my 4V heads during the porting process, I am about to either weld the "floors" or get some tongues to reduce the height, but am unsure what way to go yet?
has anyone fitted these tongues before?
how well do they fit the port?
and how do they stay in position?
cheers kenny;
and yes that is a real golf ball!

 

 

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Posted: Fri Nov 11, 2005 6:40 am 
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use the plates/tongues dude :)

 

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Posted: Fri Nov 11, 2005 8:53 am 
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Yet I second that s**t! use the tongues

 

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Posted: Fri Nov 11, 2005 11:31 am 
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I would definataly go the tongues.
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Posted: Fri Nov 11, 2005 11:59 am 
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In final trim these heads produced 581hp (348cfm inlet/270 cfm exhaust) @ 6800rpm, with a cam with 270degrees @ .050'' and .680''/.720'' lift, mind you the car wouldn't idle under 1200rpm and was a slug until 4000rpm.
If I can keep these figures close I think I can hit 600hp on my next 416cu'' clevo ,with the assistance of a 671 of a***!

 

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Posted: Fri Nov 11, 2005 12:19 pm 
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what car is this engine in? did you use the tounges?
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Posted: Fri Nov 11, 2005 4:59 pm 
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If you buy off-the-shelf tongues for 4V's they are cast to fit unported heads. So they won't actually fit your heads very well.
I made tongues for my cleveland intake manifold to better align with the 3V heads. I took molds of the ports with casting resin, knocked them out then had them cast in aluminium. Then I glued and bolted them into the intake with Aluminium putty F and 5mm stainless steel bolts and then ported them to match the heads.
You would need to do the same thing or use a lot more ally putty when you glue the off-the-shelf type in.

Pete.
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Posted: Fri Nov 11, 2005 7:03 pm 
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XR9UTE wrote:
If you buy off-the-shelf tongues for 4V's they are cast to fit unported heads. So they won't actually fit your heads very well.
I made tongues for my cleveland intake manifold to better align with the 3V heads. I took molds of the ports with casting resin, knocked them out then had them cast in aluminium. Then I glued and bolted them into the intake with Aluminium putty F and 5mm stainless steel bolts and then ported them to match the heads.
You would need to do the same thing or use a lot more ally putty when you glue the off-the-shelf type in.

Pete.

you couldn't give me a number or contact info on who could cast these please, I love these heads as they flow more than yates & other competition heads , but they are just too slow in velocity under 4000rpm as they were ported for drag type applications (5000-8000rpm) the exhaust is getting port plates (the ones where you mill the port off the head & fabricate a high port plate that raises the port by 3/4'')
thanks Pete this advice is probbaly how I will overcome this prob,
kenny

 

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Posted: Fri Nov 11, 2005 7:08 pm 
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XCH45R wrote:
what car is this engine in? did you use the tounges?

XE falcon ,street registered best time of 10.91 sec , but very thirsty! 2km-Litre in street trim and 2 bottles of octane booster to a tank but it was all worth it when you get up on 2 wheels while lining up a rex at the lights!!

 

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Posted: Mon Nov 14, 2005 2:24 pm 
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you couldn't give me a number or contact info on who could cast these please, I love these heads as they flow more than yates & other competition heads , but they are just too slow in velocity under 4000rpm as they were ported for drag type applications (5000-8000rpm) the exhaust is getting port plates (the ones where you mill the port off the head & fabricate a high port plate that raises the port by 3/4'')
thanks Pete this advice is probbaly how I will overcome this prob,
kenny[/quote]

Well the foundry is here in Perth....you must have a foundry over there?
You'll need to make the port smooth so that when you take a mold of them you can actually get the plug back out. The casting resin is called "Ebalta" and you need to coat the ports with a mold release. I used this resin which is like runny white glue which you just paint on. When you break out the solidified Ebalta from the ports you may have breakages but you can glue the pieces back together afterwards with super glue.

Pete.
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Posted: Mon Nov 14, 2005 2:42 pm 
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cheers Pete, I'll post some pics of the progress, sounds like fun!

 

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Posted: Mon Nov 14, 2005 8:35 pm 
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Here's a pic of my Offy Port-O with the tongues bolted in place.
I'll post up some other ones I have showing the pieces before assembly.

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Posted: Mon Nov 14, 2005 8:39 pm 
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XR9UTE wrote:
Here's a pic of my Offy Port-O with the tongues bolted in place.
I'll post up some other ones I have showing the pieces before assembly.

Image
is that a 2V boss set up I see?

 

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Posted: Tue Nov 15, 2005 11:15 am 
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Nope, it's a 3V 185cc EFI 351 Cleveland...the one I had in my ute before I put the windsor in.

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