I have been chatting to some people about running a dump valve delete set up. What are the pros and cons? Some say it's the best way and some say it's bad as it will stop the turbo stall between gears and can damage the motor. How do most people run this scenario in the 400-450bhp region with a FMIC?

 

Hi there

Pros is just chatter of turbo which will give you,nothing more and nothing less

Cons depends on turbo,this can damage the turbo(older VF range or VF range in whole),can slow spool up time

If you are running the Garrett based turbo,you will be OK run DVless,as i said depends on turbo and from this i would go,we are running the MDX321T DVless.

Jura

 

The turbo is MD321T Billet. So you rekon this would be fine to run it this way?

 

I'm running MDX321T,which is MD321T billet without the DV(DVless or DV delete)

Yes will be OK,Mark@Lateral performance said,he don't have problems if we will run DVless,turbo will be covered by warranty,but turbo will be not covered if you will run ALS


Jura

 

Ah that's great as no anti lag is being used. So just to clarify.. The pipe which returns to the turbo in let pipe where the standard re circ is blanked off, the T piece off the fmic pipe work is blanked off and the little pipe that connects to the bottom of the inlet manifold (under the throttle body) which normally connects to the dv is connected to a boost sensor this is fine?

 

We are running the custom inlet pipe,but as you are said yes you can run this as you are suggested

Here is our engine bay




Jura

 

That's great! There is a turbo inlet pipe to go on with no ports off of it do it's just one big silicone pipe that is to be used with a RCM catch can. That blue pipe you have coming out the intercooler pipe from the throttle body is blanked off yes?

 

Hi there you can go with custom inlet pipe,which you can create from Intercooler pipework and some silicone couplers/joiners,will be cheaper than any Silicone inlet pipe

About the catch can,we are running custom catch can,i would suggest baffled catch can(not sure if Clive@Mad Hammer still selling them,contact him,we are running similar what Clive fabricate them)

Yes this blue pipe is blanked off,now this outlet for DV has been welded off


Jura

 

Ahh ok ok. So at least I know the dump valve delete is all set ok. Don't suppose you know much about an HKS FCON ecu do you?

 

HKS F-CON is not the best ECU,you will be better with standard ECU and 3bar MAP sensor,yes you will be limited by boost up to 1.55bar(above this you must go with Apexi AVC-R),plus i would suggest bigger MAF tube or yo can go route of the RCM big cone which will be OK for your needs.

With right setup you should be making around 450bhp on V-power and 480bhp on 20% methanol


Jura

 

That's fair enough it's just I know someone who can get them cheap was just a though. The RCM system has already been taken care of. So can't the stock ecu produce more than 1.55 bar of boost with a MD321T?

 

Yes can produce more above 1.55bar,but problem is can't control boost above 1.55-1.6bar.Due this i would suggest Apexi AVC-R if you want go above 1.55-1.6bar

With MDX321 we are running 1.7bar and we are making 452.9bhp on V-power and 490bhp on V-power and 20%methanol

Jura

 

I am using the earlier Md321t without a DV and have done over 50000 miles on it without problem.
426bhp / 462 ft/lbs.

 

Well if that isn't a confidence build I don't know what is! thanks!

 

Even with the AVC-R, it is not recommended to go above the limit of the MAP sensor.

 

Due this i would recommend run 3bar MAP sensor


Jura