Just installed a Evo 3 16g and the car feels slower

[nightstocker99]

Just installed a Evo 3 16g and the car feels slower now. I read my boost gauge and it was only pushing 9.5 psi. That is way less then what the car was running before witht he stock T25. Whcih was running 15 psi. So i installed my MBC thinking it would fix the problem but it didn't. The car is back up to 15 psi but it still feels slow. Anybody got any ideas. Thanks Brandon

 

[RedTurboEclipse]

Stock fuel?

 

[diablos991]

Do a boost leak test.

Also, you are probably knocking at 15psi and your stock fuel system.
While 15psi might have been ok on the t25, the e316g is much more efficient and will produce more airflow. Thus, requring more fuel.

You need to get a logger to monitor your timing before you start to turn the boost up.

 

[DSMunknown]

I agree with diablos991. Until you are running with all the proper supporting modifications and until the engine is well-tuned, you will not see the full potential of the turbo. It is as simple as that.

 

[travislaw]

As stated already you need the supporting mods. At a bare minimum you need the following to get any kind of decent boost:
195 LPH Fuel Pump or 255 LPH Fuel Pump with an Adjustable Fuel Pressure Regulator
Fuel Pump rewire mod (highly recommended)
Aftermarket Boost Gauge
Boost level set no more than 12-14 PSI (mine is currently set at 9 is a lot faster than the T-25)

To Get the full potential of the turbo you would need:
All the parts listed above
FMIC
Boost Pressure Regulator
Bigger Injectors
Some type of tunning device to control Bigger Injectors

I may have missed something, but that should get you where you want to be.

 

[-TunedDSM-]

As stated already you need the supporting mods. At a bare minimum you need the following to get any kind of decent boost:
195 LPH Fuel Pump or 255 LPH Fuel Pump with an Adjustable Fuel Pressure Regulator
Fuel Pump rewire mod (highly recommended)
Aftermarket Boost Gauge
Boost level set no more than 12-14 PSI (mine is currently set at 9 is a lot faster than the T-25)

To Get the full potential of the turbo you would need:
All the parts listed above
FMIC
Boost Pressure Regulator
Bigger Injectors
Some type of tunning device to control Bigger Injectors

I may have missed something, but that should get you where you want to be.

A logger would benefit you as well, you will be able to see what your car is doing and where you are knocking

 

[JayRolla]

You should not feel noticably slower because of the turbo. I dont care what anyone says. You have a BOOST LEAK!!

 

[kspharris]

I think that you have a boost leak like JayRolla said. I also agree with getting the supporting mods, did you prim the turbo?

 

[travislaw]

You should not feel noticably slower because of the turbo. I dont care what anyone says. You have a BOOST LEAK!!

I thought when he said slower he was taking about how the Evo III takes longer to spool up than the t-25 so it would be slower in that sense. You are right however, it probably is a boost leak as well. Plus having the boost set way too high for a stock system will bog it as well.

 

[nightstocker99]

I think that you have a boost leak like JayRolla said. I also agree with getting the supporting mods, did you prim the turbo?

Ok so how do you prim a turbo?? I had the turbo installed by a local shop becuase i am just to busy to do it myself that and the turbo and installtion kit was 850 dollars or something like that, so i wasn't about to 'F' that up.

But yeah with the new turbo the car feels like it has less HP then before. I guess that would have something better to say then "Slower". But I right now am on the path the supporting mods for my car? I don't have my license right now so all is cool the car will get to where it needs to be before i can screw it up.

 

[diablos991]

"Priming a turbo" consists of disabling the spark and fuel and cranking the car for 10 seconds, letting the starter cool off for a minute, and repeating 3 times. This process is to be done right after the installation of the turbo to ensure that oil is circulated through the turbo before you actually start the car.

Have you done a boost leak test yet?

 

[kspharris]

If the shop installed it then they sould know that they need to prim the turbo and it is most likely done since it has been driven. I would look for boost leaks, exhaust leaks (especially between the turbo and the head). You also may want to do a complete tune up, plugs, wires, fuel filter, etc... I would do a compression check and get a logger. If all that is ok then I bet you are getting knock and it is pulling timing which will make your car slower. Let us know.

 

[JayRolla]

Make a boost leak tester and test that turbo system. I bet you have tons of leaks. Lots of shops dont even boost leak test after something like that when you always should.

 

[DSMunknown]

I would look for boost leaks, exhaust leaks (especially between the turbo and the head). You also may want to do a complete tune up, plugs, wires, fuel filter, etc...

A simple way to check for exhaust leaks is to use a can of Sea Foam Auto Marine motor treatment. If there is white smoke coming from the exhaust manifold or from the downpipe area (basically anywhere but the tailpipe), then you have an exhaust leak.

Link to Sea Foam Sales
Sea Foam thread
Another helpful Sea Foam link

 

[JayRolla]

You can also just suck in a little oil through the manifold at a vaccum line. When the oil burns you can see if any smoke comes out the manifold. Dont do to much, and you will make a huge smoke cloud

 

[nightstocker99]

Ok guys here is an update for yea. I just bought a boost leak tester and i should get it by friday. So I guess we will find out what is going on by this weekend

 

[travislaw]

Make sure you have a compressor or and air tank to attach to the tester. You can use a bike pump (I heard) but it takes forever. Air tanks are at Wal-Mart for $16. You go to your local gas stations and use the air pump there to fill it up. When you do the test make sure that someone is looking at an aftermarket boost gauge and making sure that gauge doesn't go over 20 pounds or you will start blowing out seals.

 

[nightstocker99]

Make sure you have a compressor or and air tank to attach to the tester. You can use a bike pump (I heard) but it takes forever. Air tanks are at Wal-Mart for $16. You go to your local gas stations and use the air pump there to fill it up. When you do the test make sure that someone is looking at an aftermarket boost gauge and making sure that gauge doesn't go over 20 pounds or you will start blowing out seals.

Thanks for the tip. I actually have a little air pump that we bought a couple of months ago.

 

[DSMunknown]

Click on these two links below for an additional method of monitoring the pressure when doing a boost leak test.


http://www.dsmtuners.com/forums/showpost.php?p=151025801&postcount=8
http://www.dsmtuners.com/forums/showpost.php?p=151026092&postcount=9

 

[JayRolla]

I pressurize to about 22psi because thats what boost I will be running. I always pressurize to the boost you want to run or at least 20 psi