Engine/Transmission (1998.5 - 2002) Wastegate

[kaptn]

I am still confused about putting turnbuckle on wastegate. Will I need to do anhything else or will computer pick up change in pressure?

 

[Snow man]

Only do the turnbuckle if you have added fuel thru bigger injectors,fueling box,or a combination of the 2. You must have a boost module also,or the computer will defuel,and set an over boost code. Most of the fueling boxes have the boost module built into them,such as the Edge EZ,and Comp,both of which I have used and love.

 

[kaptn]

I have DD1 injectors,DTT transmission upgrade,EGT,60# Boost,transmission temp gauges,Mag Hytec DD transmission pan. I guess I must have a fueling box to mess with the wastegate. Thank you.

 

[Shovelhead]

Originally posted by kaptn

I have DD1 injectors,DTT transmission upgrade,EGT,60# Boost,transmission temp gauges,Mag Hytec DD transmission pan. I guess I must have a fueling box to mess with the wastegate. Thank you.

kaptn,

Welcome.



You're seeing 60# of boost and not setting a code?

Whatcha using as a wastegate setting now?



Click on the cp user button at the top of the page, scroll down and set up your "Signature" box.

It'll help by showing whatcher driving.

 

[Cummins4Life]

Welcome to the board Kaptn

I'm thinking he implied a 60# boost gauge



or that turbo isnt long for this world.

 

[Shovelhead]

"Homer Simpson"

DOOOOOOOOOOOOOOOO

 

[kaptn]

I am still confused! I have been told now that the computer will not defuel,but set a code that cant be removed. I am just looking for a little more power untill I can afford Edge comp box and bigger turbo.

 

[Whitmore]

Kap

If you restrain your wastegate from opening with a turnbuckle without a fueling module attatched you WILL set a code off for overboost that can be detected by your dealer... ... ..... wait till you get a module... ... sorry, Kevin

 

[Diesel Freak]

Originally posted by kaptn

I am still confused! I have been told now that the computer will not defuel,but set a code that cant be removed. I am just looking for a little more power untill I can afford Edge comp box and bigger turbo.

The ECM will not defuel untill it sees H. O. O. S. boost pressure.



if you restrict your wastgate without using a Boost Module you will defuel when your wastgate fails to open.



Higher boost pressure WILL NOT GIVE YOU MORE POWER! Sorry to yell here, but this seems to be a missconseption that high boost makes more power.



if you have excessive EGT with stock boost, then you will benefit from higher boost pressure, but you will need a Boost Module to get there. DO NOT GO OVER 30 PSI OF BOOST WITH THE HY TURBO, you will have excessive drive pressure, and will actually loose power because of it.



if EGT is not getting out of hand, (I would not think so with DD1's) you may benefit from a boost module while still running a fully operational and un-restricted wastgate...



get the Module first..... then if you need more boost to keep things under 1200F pre-turbo use the turnbuckle.

 

[Snow man]

Not to go against diesel freaks advice,but i wouldnt buy a boost module,and not turnbuckle it. There is nothing to be gained by just a boost module,without raising the boost. I would look for a used edge EZ,they arent much more money than a boost module,and you wil gain a lot of low end hp,and torque. The used EZ can then be sold when your ready to go to a comp. If you can get a used boost module cheao,then that a different story,do not pay 150+ for one,used EZ's are out there for 300-350.

 

[kaptn]

I can hit 1400 degrees if I get on it. I have a different option than the stealer. So if I am getting this right I can adjust turnbuckle up to 30# boost and the only problem will be a code in the computer and not defuelling? Thank You for all the awnsers guys I am taking them all into consideration

 

[Lsfarm]

Almost right

The ECM will still defuel to limit boost and power once the MAP sensor sees over about 20psi of so. Even if the wastegate is turnbuckled shut, there will be only so much fuel [combustion pressure] to create boost. The ECM uses the info from the MAP [Manifold Air Pressure I think] sensor.



The Boost fooler that is either added on or built into a fueling box like the EZ or Comp 'clips' the voltage from the MAP so that the ECM thinks the MAP sensor is reading only 18-20 psi. Therefore the ECM doesn't limit the fueling. With no limiting of the fuel by the ECM and Injection pump, your larger injectors can supply the extra fuel and create the extra power [and extra boost if the wastegate doesn't bleed it off].



If you are getting 1400*, you need more boost [combustion air] to cool down your combustion temps. Once you get a boost fooler or an EZ, you can just plug the wastegate line on your turbo. With just Stage 1 injectors, [and even with an EZ] you won't over speed your turbo, and you won't create enough back pressure [excess drive pressure] to reduce power. Give your engine as much boost as it can create. With your relatively mild extra fueling, the boost will be self limiting.



I was running BD1's, and Edge EZ with the HY35's wastegate hardline plugged, and got only about 34-36 psi boost, and zero ill effects. And saw 1150* as a max EGT. When I set the wastegate to limit boost to 28-30 psi, I saw 1250* EGT's, so I just plugged the hardline, and let the fuel limit the boost, and had cooler EGT temps in the bargain.



Hope this helps, Greg L the Noise Nazi

 

[kaptn]

I will order the edge comp box next week and when it comes I will plug the hard line on the turbo. 1150 degrees sounds pretty good. I hope I will get them down there I am getting tired of running off the road watching the D%$# EGT gauge.

 

[Diesel Freak]

Originally posted by kaptn

I will order the edge comp box next week and when it comes I will plug the hard line on the turbo. 1150 degrees sounds pretty good. I hope I will get them down there I am getting tired of running off the road watching the D%$# EGT gauge.

ummm, if you try and use the PEC on the higher levels your EGT will be through the roof! Do not plug your wastgate! The HY is just too small to keep EGT down when using a PEC... unless you keep it on level 1x5. You may be able to use level 3x5, but EGT will be HOT.



DO NOT PLUG YOUR WASTGATE OFF!

 

[kaptn]

Dang I thought everyone plugged their wastegates? I guess I will just follow the directions on the Edge Comp box. I have been reading a lot lately about not hooking up the pump wire say till I get a bigger turbo. Thanx

 

[Lsfarm]

NO difference

There is no difference between putting a turnbuckle on the wastegate arm and locking it down, or just plugging the hardline. The net result is the wastegate doesn't open. The HY works just fine with an EZ or a PE Comp with the pump wire not hooked up [acting as an EZ]and the hardline plugged, or the wastegate arm tied down.



If the truck is seeing 1400* right now with stage one injectors, adding the box and plugging the hardline gave me 1150* EGT's. With the wastegate set to open at around 30psi the EGT's were 1250*, so I personally don't think that this is better. If the engine can create and use the boost and lower the EGT's in the process this is all good.



If you hook up the pump wire on the Comp, and use settings higher than 1x5, you will be increasing fueling and will see higher egt's, Just don't run more than 1250-1300* continuously.



Greg L