Does anyone have the MAP Dump DP with the Turbosmart External WG? http://www.maperformance.com/map-sta...-cg40-o2e.html

how does this piece fit and how's the External WG setup with the internal WG

Also, How is the MAP 3.5 in Intake?

 

Good luck getting an answer. I've been trying for a month. The map guys just keep telling me to order it cause they guarantee all their products work. Don't want to feel like a guinea pig.....

 

not sure if you noticed, but it says external waste gate not included. external waste gate is designed for larger stock frame turbos.

 

This is definately needed for larger stock frame turbos i.e. FP Black, MAP's EF4 turbo, etc. The design of the stock wastegate does not allow for turbos to hold much boost in the higher rpm range. So MAP designed this to solve the issue. You use this with the an upgraded internal wga. I am pretty sure you run a MBC to the internal wga and the 3 port to the external wga. When the internal wga cant take the pressure anymore and opens, the turbo will still hold boost because of the external wga will be closed and holds boost so much better.

We all know what happens if you weld the internal wastegate closed and use a WGA somewhere else, your spool goes to ****.

I like MAP's 3.5" intake and heatshield but i do not like that they used the stock BOV location. I like the BOV to be relocated on top of the LICP.

This is how i understand it. If i am not correct, someone please correct me. I am pretty sure murlo is running this. Hopefully he chimes in.

 

I am not running this, I just did the o2 dump and stayed with just an internal gate. I was strongly considering it but opted out as its expensive.

 

Damn, you have the perfect setup to test this out on. Talk to chris and see if you could do some dyno pulls with it installed!

 

No more am I going to guinea pig, sorry lol. My tune is not getting any more aggressive. If anything I will dial it back.

 

You guys are talking about this like its never been done before lol, we offer the same product for the Evo 8 & 9 and it works great. Leave the internal wastegate setup in place to retain spool characteristics (run a boost source straight to it, no boost controller) and run your boost controller (either manual or electronic) to the new external wastegate which will stay closed and allow you to run whatever boost level you desire.

 

Oh I have no doubts it would work great and all Chris, I just have no desire to push my setup any further....yet

Question for you, can you modify my current downpipe to accept the compgate one later? Or is that a negatory?

 

If you dont mind me asking, why not run a MBC to the internal WGA to keep it closed longer, esp if you are running the stocker, and keep the 3 port for the external? Do you see any decrease in the spool when the internal wga opens and do you see any lose of boost control response with the external wga?

 

The far easier way to do this is to get a stronger wga on the stock frame. I have a 25psi wga, and I can hold boost out to red line. But - the stock frames can't do anything with the extra boost, they simply cannot flow enough. 600whp or so on the larger (black, ef4) is all you'll ever get.

 

I'm sure we could, yes.

You certainly could do it that way but with the internal actuator not opening until 10+psi you're generally already through the "spool" phase. We haven't done too much testing with different boost control in this configuration as we had great results running without a boost controller to the internal actuator. And no, boost control with the external wastegate is tremendous.

 

I already have this downpipe along with the Compgate40 wastegate which will be ready to go in the car next week. I will be testing it, and the internal wastegate will be changed to the FP 18 psi one, would you recommend the FP wastegate though or not? I already have it

 

any updates?

 

I installed a separate boost source to the internal wastegate which the fp 18 psi and the boost controller 3 port directly to the external wastegate as shown here https://www.grimmspeed.com/install_g...ne_version.pdf

But the car is boosting to a max of 5 psi