Good pics of ported Magnum or SOHC heads?

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daver
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Good pics of ported Magnum or SOHC heads?

Post by daver » Fri Jun 19, 2009 9:37 pm

Anybody refer me to a post or site containing good pics of ported SOHC or Magnum SOHC heads?

Found a few posts from searching, but some of the pics are old and have been removed. Any suggestions or direction would be appreciated, thanks.
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03blackrt
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Post by 03blackrt » Fri Jun 19, 2009 10:58 pm

Stock SOHC intake...

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Mild cleanup of SOHC intake (not much to do)...


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Stock standard SOHC exhaust...

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Mild cleanup of standard exhaust...

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Stock standard SOHC exhaust...

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Stock Magnum SOHC exhaust...

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Hogged out standard SOHC exhaust...

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Last edited by 03blackrt on Sat Jun 20, 2009 5:44 pm, edited 1 time in total.
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c987long
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Post by c987long » Fri Jun 19, 2009 11:39 pm

wow, what a difference
2001 neon r/t sold
98 sport turbo- built motor 2.0 ngc DOHC, powered by srt ecu and hp tuners
esteinmaier wrote: We all know that an SRT4 wing is the Chuck Norris of car parts.
occasional demons wrote: Dude, your neon is all the sex you'll ever need!
:lol:
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daver
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thanks!

Post by daver » Sat Jun 20, 2009 1:39 pm

Thanks, those will definitely help. Gonna attack the head today, so maybe will try to take some pics of before and after.
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Donkeypuncher
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Post by Donkeypuncher » Sat Jun 20, 2009 6:12 pm

Wow, I didn't realize the exhaust side was that bad. This makes me want to snatch up a spare head and do some work.
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srtjesse
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Post by srtjesse » Sat Jun 20, 2009 6:26 pm

do you guys ave any pix of the intake side
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2004 white dodge neon 2.4 DOHC swapped
2004 red dodge neon srt-4 gone :(
2000 flat black plymouth neon 2.0 DOHC swapped gone :(
2002 silver dodge neon parts car R.I.P
2000 green dodge neon parts car R.I.P
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03blackrt
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Post by 03blackrt » Sat Jun 20, 2009 6:57 pm

Donkeypuncher wrote:Wow, I didn't realize the exhaust side was that bad.
The exhaust isn't that bad. It is great for what it's designed for... low end torque and a max rpm of 6,000ish rpm with a very small lift camshaft.

Compare that to an exhaust desgined for 13,000ish rpm...

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Donkeypuncher
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Post by Donkeypuncher » Sat Jun 20, 2009 7:04 pm

So I guess a mild port is all that's needed? Does the same apply on the intake?
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03blackrt
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Post by 03blackrt » Sat Jun 20, 2009 7:18 pm

I wouldn't say a mild port is all that's needed. The port just needs to be matched to the application. Take a look at the Magnum port versus the standard port and compare the differences in the port to the differences in the hp/tq, cam size... ect.
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daver
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what tool was used on the exhaust bowls?

Post by daver » Mon Jun 22, 2009 4:33 pm

03blackrt: what tool was used on the exhaust bowls in the pics?

Have you ever gone through on a SOHC head in the exhaust bowl area? Wondering how thick that back and side wall are in that area?

BTW: that a T3 lotus head in the later pic?
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hybrid-Srt2001
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Post by hybrid-Srt2001 » Mon Jun 22, 2009 10:29 pm

race ported magnum head
exhaust
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intake
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combustion chambers
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exhaust
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Intake
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size
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compared to a fast fabs header
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[/quote]Yup it definately needs to go lower. If its not scrapeing constantly why you are driving then its not low enough bro. :lol:[/quote]
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03blackrt
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Re: what tool was used on the exhaust bowls?

Post by 03blackrt » Tue Jun 23, 2009 1:51 pm

daver wrote:03blackrt: what tool was used on the exhaust bowls in the pics?
I used a large sanding drum to get the nice sweeping curves and nice blending into the stock port. I find that smaller bits create a choppy, wavey shape unless you're really good.

Tools used...

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A light cut with a carbid bit is required to make rom for the sanding drum...

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daver wrote: Have you ever gone through on a SOHC head in the exhaust bowl area? Wondering how thick that back and side wall are in that area?
There should be enough material to come straight down (parallel to the inside face for the vale seat) from the inside diameter of the valve seat. Althought ideally this arae will tapper inwards toward the valve stem (like the stock port).
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daver
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sanding drum.. good idea.

Post by daver » Wed Jul 01, 2009 7:56 pm

Ahh larger diameter sanding drum. On my test head I was using a ~ 3/4" round stone to keep the back wall uniform. It wasn't quite large enough to completely take out the step in the back wall just below the seat. Wasn't sure that there was enough material to completely take that out, but apparently there is.

Yeah the small bits can be hard to keep things smooth. Light pressure and moving quickly helps, as does using a sanding roll or stone afterwards.

I've done all my past work with 1/8" shank bits and various dremels, but I should probably step up to a 1/4" shank tool at some point. Maybe this would be a good opportunity. I could probably practice with it on the scrap standard SOHC head before I tackle the magnum head.
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