Intake Manifold Flow Test:LS3 vs Rick Crawford Radius Rod LS3 vs Ported LS3 FAST LSXR
09-21-2017, 08:55 PM
#24
TECH Senior Member
This has to be one of my favorite threads on this whole forum so far!
09-24-2017, 03:08 PM
#25
I sent a LS3 manifold to Rick, he did his magic then sent it back. My car is a 06 GTO with LS3 heads that I had Advanced Induction do some work on. I'm running a Cam Motion cam and the sbe. The car pulled 480/434.
09-24-2017, 09:27 PM
#26
TECH Senior Member
09-27-2017, 05:43 AM
#28
They theory is the rods act as a bellmouth on the runner and channel more air.
My understanding based on a comment in an email from Rick Crawford is this only works with the LS3 but eventually I hope to ask him for more details.
My understanding based on a comment in an email from Rick Crawford is this only works with the LS3 but eventually I hope to ask him for more details.
09-27-2017, 09:45 AM
#29
TECH Senior Member
09-27-2017, 04:01 PM
#30
That is what is happening. It would be interesting to see someone with the right equipment to analyze exactly what is happening and why. Then maybe a more efficient intake manifold can be produced.
09-28-2017, 05:19 PM
#32
When my 99TA finish getting the new 416 installed at Norris Motorsports, I hope to pull my old LS6 intake. There are a lot of LS6 tests intended for my old LS6 intake like base line flow test, then 90mm snout, more flow testing.
My theory is the narrower cathedral intake port doesn't respond much to the Rod - but I have nothing to base that guess on.Another guess is, it could be that terrible narrow stock snout on the LS6 intake is the real problem with getting the Rod correctly positioned. The Ls6 might need a radical port to remove the center support for the rods to work.
My hunch is to take an LS6 and make it like the working RR LS3 intake as much as possible , 90 mm snout, radical port removing Center supports - then fiddle with Radius rods.
After all of that is done, I want to see if Rick will consider trying a Radius Rod Mod for it. Otherwise, I may ask the cylinder head shop to test my LS6 intake with a wooden dowel temporarily attached to simulate a Radius rod.
It won't be cost effective probably but it might be very effective as a sleep mod.
That's my long term goal but it will take a while to happen. The TA is front and center with the 416 swap for me right now and work is very busy.
My theory is the narrower cathedral intake port doesn't respond much to the Rod - but I have nothing to base that guess on.Another guess is, it could be that terrible narrow stock snout on the LS6 intake is the real problem with getting the Rod correctly positioned. The Ls6 might need a radical port to remove the center support for the rods to work.
My hunch is to take an LS6 and make it like the working RR LS3 intake as much as possible , 90 mm snout, radical port removing Center supports - then fiddle with Radius rods.
After all of that is done, I want to see if Rick will consider trying a Radius Rod Mod for it. Otherwise, I may ask the cylinder head shop to test my LS6 intake with a wooden dowel temporarily attached to simulate a Radius rod.
It won't be cost effective probably but it might be very effective as a sleep mod.
That's my long term goal but it will take a while to happen. The TA is front and center with the 416 swap for me right now and work is very busy.
Last edited by 99 Black Bird T/A; 09-28-2017 at 05:28 PM.
10-06-2017, 06:42 PM
#37
Not sure what to tell you, my understanding is that he's a one man shop working out of his garage. You could try Gwatney Performance, I read somewhere that Rick approved them do make the same style mods using his process.
https://gwatneyperformance.com/product/ls3-intake-mod/
https://gwatneyperformance.com/product/ls3-intake-mod/
10-07-2017, 01:21 PM
#38
Not sure what to tell you, my understanding is that he's a one man shop working out of his garage. You could try Gwatney Performance, I read somewhere that Rick approved them do make the same style mods using his process.
https://gwatneyperformance.com/product/ls3-intake-mod/
https://gwatneyperformance.com/product/ls3-intake-mod/
10-11-2017, 01:45 PM
#39
Not sure what to tell you, my understanding is that he's a one man shop working out of his garage. You could try Gwatney Performance, I read somewhere that Rick approved them do make the same style mods using his process.
https://gwatneyperformance.com/product/ls3-intake-mod/
https://gwatneyperformance.com/product/ls3-intake-mod/