I installed the Forge DV (type RS). (My boost it at 19-20) I started off at 42 clicks and it pulled hard. Then i pulled over and turn it up 4 more then 4 and 4. It never Fluttered on me. I took my brother to help. I ended up turning it up all the way and I never got it to Flutter. I did stop to 60mph runs and never felt anything, car was running normal just pulling harder. I then took it on open road and drove up to 100mph and let off the gas fast and slow never felt any surging (flutter). I pulled over and turned it down 6 clicks to make sure i wasnt surging. Does anyone have any ideas why i never felt any fluttering?

I have stock intake with HKS filter and exhaust with MBC. I do hear a small flutter at partial throttle which should be normal , even then its very low.

I really need some direction on this one. I dont want to be running my car with compressor surging.

 

I am lost? Do you want it to flutter, my stock IX DV flutters so bad at part throttle it's horrible,but at high boost letoff is very smooth?

 

Ya, im with fastrob.

What are you trying to talk about here?

 

Well yes and no. I want it to Flutter so I can see when it starts surging Then i can turn it down a few click till it stop. You can say I am in the DV adjustment part right now. I've heard of Alot of people having lots of problems with fluttering. In my case I have non and dont know how to tune it.

 

What? This thread is getting to the point of ridiculousness.

You want to flutter, and because it doesnt your ?????? I have not heard of people having problems with RSs fluttering, Maybe Greddy RS but not Forge - totally different DVs.

Basically, tune to part throttle let offs. In high load gears - 4th/5th and city driving you will get some slight flutter. If you have it too tight it flutters very hard and shutters through the whole car - then you know its too tight, loosen it up some then its good. Full throttle lets offs prby will not flutter - well unless you did something wrong.

Going to ask this - did you put it on right? A vac. hoses connected, clamps tight, its in the right way...

DV tech:
https://www.evolutionm.net/forums/sh...hreadid=209640

 

Hey I am not trying to make this so hard. I am just trying to "adjust"" the DV for the FIRST time. I dont want it to Flutter. I want to make sure i tune it right and to do that iam just following what everyone even Forge's Sheet says how to tune it.

- Keep turning it up till you get some Fluttering then turn it down few clicks till it gone. That is what "forge Adjustment sheet tells me how to tune it"

Please correct me if I am wrong. And tell me what is th correct way to tune the Forge Type RS DV. Which would be great thanks.

 

So your saying the samething I am trying to do. Get it to Flutter so I know I have it "too" tight and need to turn it down. Which is what I have not been able to do..... So my question here is What now? Is the spring too soft or the DV just so good it wont flutter and i need to leave it alone and drive? Is that what your saying?

 

Ok, I think we are on the same page now. Does it say to tune at full WOT or Part lift-offs? At part lift-offs (5th @ 40 mph) it does not flutter, even when its all the way tight?

You could go right to the source and ask Mike@Forge or call 407 447 5363

 

"Full-boost throttle" is what the Sheet says. I have emailed Forge just waiting for a reply. Which I only have today to work on the car. Monday back to work.

I am sorry if i've made this threah so hard. I am just trying to tune it and to make it clear no i do not want to have Fluttering. But to get it tuned thats what I am reading I can scan the sheet and post it....

But thanks for all the help i'll see what i can do.

 

Humm, thats confusing. "Full-boost throttle" could mean to go all the way to redline or just to you hit 20 psi then let off. And that would vary in diff. gears (i.e. 2nd v. 5th).

Its all cool. Just was a bit confusing. They make a great product. And Mike is very knowledgeable. Hope you can get it all straight.

 

42 clicks seems like an awful lot. If I remember correctly 25 click or so is the normal range for 21psi.
I'm having slight issues with mine though. On the street it is great..with only slight fluttering at partial throttle high gear lift. At the road course though it fluttered BAD. I never could get it adjusted right. Maybe I need to tighten it up? Coming out of a turn and feathering in the throttle (half throttle) it was terrible...

 

When adjusting or tuning a BOV or DV he want it to be as tight as possible and not stutter. If you are trying to run 35psi or some super high amount then ur BOV is going to stutter at low boost like 2-5 psi. That is a compramise. I have a Type S with both vacuum ports correctly installed and have no stutter at all and can hold 26 psi. IF your getting surging and stuttering in 4th and 5th gears at only a couple pounds then its too tight. I can also tighten my Type S down all the way tight and get no surge at 15 psi or above. but bolew that u know its going to be awful.

 

Broeli, yes 42 click is alot. Thats why iam not sure why the car doesnt Flutter. Iam going out side now going to turn it all the way down and start from there see if anything changes. I'll post what happens.

 

Also 99% of people on here dont know how to correctly install a Type S or Type RS.

 

Whats the correct way to install one?