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Old 02-25-2012, 08:32 PM   #181
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I already shipped it, Ill send the tracking number.
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Old 02-26-2012, 08:31 AM   #182
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Just throwing it out there, that my intake manifold from this guy is awesome and you should all buy one.
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Old 02-26-2012, 12:56 PM   #183
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Bookmarked for next year. This is much better than those JDM squares.
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Old 02-26-2012, 11:11 PM   #184
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Quote:
Originally Posted by falcon View Post
Just throwing it out there, that my intake manifold from this guy is awesome and you should all buy one.
Thanks man, glad you like it.
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Old 06-15-2012, 01:01 AM   #185
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does anyone know how to get a hold of gotpsi? i wanted a quote,i thought he had a site but i cant find it?
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Old 06-15-2012, 01:14 AM   #186
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http://www.rpracingproducts.com/

Finally getting that manifold welded up?

--Ferdi
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Old 06-17-2012, 11:13 AM   #187
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Hey guys, this is gotpsi, I have not been able to post or pm so the best way to contact me is through my web site listed above thanks.
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Old 06-22-2012, 09:49 AM   #188
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i failed at making one
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Old 06-27-2012, 12:19 AM   #189
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Thanks for that informative post
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Old 06-27-2012, 02:11 AM   #190
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[IMG][/IMG]

[IMG][/IMG]

[IMG][/IMG]

Here is some newer pics, and one of a flush mount velocity stack done recently.
Also shown in the pics is the new tapering runners.
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Intake manifold build-imag0314.jpg   Intake manifold build-imag0348.jpg   Intake manifold build-imag0341.jpg  
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Old 06-27-2012, 03:32 AM   #191
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NICE! Great work man...beautiful welds, rockin' velocity stacks! How tough was it to get them that flush?
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Old 06-27-2012, 10:17 AM   #192
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It's easy to get them flush, the raised ones are harder.
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Old 06-27-2012, 10:24 AM   #193
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Any reason for the taper on the runners? I noticed both you and begi started doing this with the most recent mani's
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Old 06-27-2012, 10:43 AM   #194
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If you want to get scientific search for Venturi nozzle and Bernoulli. Interesting stuff.
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Old 06-27-2012, 11:41 AM   #195
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To encourage uniform and smooth transition from the chamber to a high velocity runner, sharp edges tend to create turbulence which acts as a bottleneck to flow.
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Old 06-27-2012, 11:47 AM   #196
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Quote:
Originally Posted by yank View Post
If you want to get scientific search for Venturi nozzle and Bernoulli. Interesting stuff.
I'll look into it, thanks
Quote:
Originally Posted by Der_Idiot View Post
To encourage uniform and smooth transition from the chamber to a high velocity runner, sharp edges tend to create turbulence which acts as a bottleneck to flow.
isn't that what the velocity stacks are for?
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Old 06-27-2012, 01:05 PM   #197
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Quote:
Originally Posted by 18psi View Post


isn't that what the velocity stacks are for?
sounded like he was explaining what the velocity stacks are for to me..

Just think of a tapered runner as a very subtle velocity stack. By starting out with a larger diameter than the intake port of the head the effective unrestricted flow area can be equivalent to that of the head intake port diameter.

Notice the smaller unrestricted flow CSA (cross sectional area) in the top image. this same effect happens at the base of the velocity stack although it is not shown in the picture. The tapered runner helps combat the effects of this turbulence.
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Old 06-27-2012, 01:50 PM   #198
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I get it, thanks. I guess what I should have asked is how significant the effect is (ie: how much you actually gain from it) but I have a feeling that has yet to be measured.
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Old 06-27-2012, 01:53 PM   #199
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it's just good practice. you want good flow: use a stack. you want to stuff a ---- ton of air as fast as possible into a container: taper the runner to increase velocity.
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Old 06-27-2012, 03:08 PM   #200
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Higher velocities usually mean a smaller boundary layer and a more turbulent flow which is good for air fuel mixture as well.
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