Hey, I got a couple of mods done, Air box and guages. I was just lookin around some performance web sites and i saw a performance wastegates. Is that ok to do on a sumwhat stock motor?? If not should i go for it?? And what will be the benefits. Thanks

 

I think I would do the exhaust before doing anything to add power.

 

ALLL RIGHTY THEN Thanks

 

Yep, I second the exhaust motion. No less than 4" turbo back all the way to really freaking cool 6" dual stacks (witch I don't have).

 

I was just talkin with my dad, (Its his truck im putting my money into) I drive it most of the time, But im goin off to college and im gonna need a truck. I was plannin on spendin nooo more than 10,000. I was just lookin on ebay and that will by a really nice 1994-97 powerstroke. I think im gonna stop putting the money into it lol and save it for when i get mine. It sucks hes already got the guages. I guess hes ready to do what he wants. Thanks guys

 

Who the heck needs a wastegate?

 

You've got the gauges... mod away! You would be surprised at what you can run without exhaust. I've been running mine without exhaust (have had gauges) and don't come close to 1250 except on hot performance runs or heavy tows. Even with the 40hp tow and pulling 8000lbs up large grades I was under 1250. Go ahead and get the mod you want, just remember to watch those gauges you just installed and you'll be fine.

wastegate mods will help to build more boost faster for the most part. I had to unplug that little red wire and have been pretty happy with the results.

 

Does that Vacuum line really make a difference. I unpluged it one day and drove it and i didnt feel one. I didnt have the guages too but.... Maby il try it tomorrow

 

The red line is actually a pressure line, not a vacuum line. Unplug it and plug the other end on one of the bolts for the intercooler boot clamps.

 

Can I show some ignorance here?

I've seen various comments about the "wastegate" mod, but haven't found anything yet that really tells me what it is and what it does for you. A little enlightenment would be appreciated. Thanks.

 

Put on your sponge hat-
How it works:
With a stock system, the boost pressure pushes air out of the compressor manifold into a control solenoid that is controlled by the PCM. When the boost reaches about 5-10psi, this valve opens some, and it sends boost pressure in the red line into the wastegate actuator canister, that gold circular thing on the back of the turbo, with the rod coming out of it. In the side of the turbine housing, there is a hole, that is covered by a flapper valve that pivots in a radius. When the wastegate is closed, the rod holds this valve closed over this hole, forcing 100% of the exhaust flow through the turbine. When boost reaches a certain point when the wastegate should be actuated, the air pushes on a rubber diaphragm, which extends the rod, opens the valve, uncovering that hole. Since that is a lower restriction, the exhaust bypasses the turbine wheel and thus limits the speed of the turbine wheel, which in turn limits the boost. The green line just like the red one, that you see going into the intake boot is the "exhaust" for this system, when the wastegate is commanded to close, the air in the diaphragm and this system goes out through the solenoid and back into the intake where the air has another chance.

What it does:
Unplugging the line and plugging it on a bolt will effectively disable the wastegate. Since no air can go to the diaphragm, the wastegate will stay closed until the drive pressure pushing on that flapper valve can overcome the spring pressure holding it closed. This will allow faster spoolup, and to a point, higher boost. Stay under 25psi however.

 

So... does the wastegate mod then disengage teh ability for the gate to open, thereby ensuring that the engine always sees the best that the turbo can do, depending on rpm?

 

Yes, that is a good way to think about it. It is possible, however, to have the wastegate open, when the drive pressure overcomes the spring pressure holding it closed. You can tighten the spring up a little by shortening the rod, by turning the turnbuckle end on the threaded shaft to effectively put more spring pressure on the diaphragm.

 

Thanks, strokin_it7.3

So... as long as I don't really push the engine by either trying to race every rat on the street or by pulling big loads, I really don't stand much chance of hurting anything by doing the wastegate mod without gauges? ( I understand that there is always the risk of the unknown, and the more power I have available the more likely I am to be tempted into "playing around" a bit... as long as I don't tighten the rod, right? )

 

Remember the PCM will defuel in an overboost situation. So even without the waistgate you have one safegaurd.