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Old 06-11-2019, 09:17 PM   #1
adventures91
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Default IAG V3 Fuel Rails + Radium Fuel Damper?

I have a set of IAG v3 fuel rails installed on my car and was hoping to install some fuel pulse dampers into the provided ports. However I can't find any information on what the thread fitting is on the damper port that is on the rails.

On Iag's item description it just states in general that the fuel rail is designed to take 8AN ORB fittings but I assume that is referring to the main fuel line fittings and not necessarily the damper port. I assume the port is either an 8AN ORB or 3/8" NPT fitting?

If it is one of those sizes has anyone ran the IAG fuel rails with the radium fuel pulse dampers (FPD-R)? just want to confirm that they will actually fit and will have clearance?
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Old 06-12-2019, 08:52 AM   #2
goneagain2011
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3/8" Npt
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Old 06-12-2019, 08:55 AM   #3
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IAG also sells their own fuel pulse dampers
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Old 06-12-2019, 09:56 AM   #4
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They are NTP as goneagain2011 mentioned. I have IAG rails and Radium dampers on mine. I did have to clearance the rail spacers (shaved one side flat for all 4 spacers) to get the dampers to fit, but that's dependent on which dampers you choose. Just fyi.
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Old 06-12-2019, 12:23 PM   #5
adventures91
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Thanks goneagain2011.

Turpid Porpoise IAG discontinued there dampers.

Thanks adesso just called radium and they also said the dampers should work but glad to hear that they are working on your setup. Just ordered a set so we will see for sure.
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Old 06-12-2019, 12:30 PM   #6
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Quote:
Originally Posted by adventures91 View Post
Thanks goneagain2011.

Turpid Porpoise IAG discontinued there dampers.

Thanks adesso just called radium and they also said the dampers should work but glad to hear that they are working on your setup. Just ordered a set so we will see for sure.
I had no idea, thats interesting.
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Old 06-12-2019, 12:34 PM   #7
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Turpid Porpoise yeah I called and asked why and they said they don't recommend running any dampers in any setup. Which is really weird to me. Especially since when I called radium they directly contradicted that and questioned where IAG was getting there info as there tests showed the exact opposite. Radium said they thought the dampers would really help especially in the setup I am running.

I am having some issues since switching to larger injectors that it seems the dampers might help with so we will see.
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Old 06-12-2019, 01:13 PM   #8
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Quote:
Originally Posted by adventures91 View Post
Turpid Porpoise yeah I called and asked why and they said they don't recommend running any dampers in any setup. Which is really weird to me. Especially since when I called radium they directly contradicted that and questioned where IAG was getting there info as there tests showed the exact opposite. Radium said they thought the dampers would really help especially in the setup I am running.

I am having some issues since switching to larger injectors that it seems the dampers might help with so we will see.
What kind of issues out of curiosity?
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Old 06-12-2019, 01:16 PM   #9
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Idle surge and stumbling which are the main things in radiums description that the dampers state they help with. I might have an issue elsewhere but my tuner said these might help so giving it a shot.
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Old 06-12-2019, 02:19 PM   #10
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Quote:
Originally Posted by adventures91 View Post
Idle surge and stumbling which are the main things in radiums description that the dampers state they help with. I might have an issue elsewhere but my tuner said these might help so giving it a shot.
Got it. What size injectors?
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Old 06-12-2019, 02:23 PM   #11
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1700cc
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Old 06-16-2019, 09:04 PM   #12
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Well I couldn't get the radium dampers to fit sadly. Going to just go ahead and try the radium rails I think
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Old 06-17-2019, 04:44 AM   #13
Long Nguyen
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Default IAG V3 Fuel Rails + Radium Fuel Damper?

Its 3/8NPT. And I run the 3/8 NPT dampers from Radium.



Fits perfectly.
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Old 06-17-2019, 06:34 AM   #14
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Quote:
Originally Posted by Long Nguyen View Post
Its 3/8NPT. And I run the 3/8 NPT dampers from Radium.



Fits perfectly.


Looks like a ton of space there. OP where’s the clearance issues?
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Old 06-17-2019, 07:47 PM   #15
adventures91
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Those are the generic oem style dampers that radium sells which they did not recommend for my application as they can only handle up to 40 and some psi of fuel pressure. So once you start getting into boost and your fuel pressure exceeds that they no longer have any benefit. I am looking at there after market fpd-r style which handle much more fuel pressure before bottoming out but are also larger then the oem style.

http://www.radiumauto.com/Fuel-Pulse...Kits-P759.aspx

The clearance issue on the fpd-r style is with the mounting bolts and phenolic spacers which I hoped I could shave down but was unable to make work.

Last edited by adventures91; 06-17-2019 at 07:52 PM.
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Old 06-21-2019, 03:31 PM   #16
goneagain2011
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Had to modify IAG TGV deletes but they fit


https://drive.google.com/file/d/1-0Q...ew?usp=sharing
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Old 06-21-2019, 10:31 PM   #17
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Google 03 Hyundai Elantra fuel dampers. Those are what IAG used to sell and you can get them for $15 a piece on eBay. That's what I have on my wrx right now and they fit the IAG fuel rails with no issues. No performance issues either that I have found when I'm in or out of boost.
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Old 06-22-2019, 03:21 PM   #18
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I think it should be noted that there has been several cases of these dampers actually causing worse fuel pulsation issues. It is too my knowledge a proper FPR sourced from the plenum (I.E. Cobb’s dampers fix), parallel (soft/flexible) fuel lines, and a proper tune are the best ways to solve the stumbling.
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