should be listed in the faq as: How to Melt your Engine!
The funny thing is I ran my motor like that for 2+ years, I blew one turbo, after having run it at 35psi+ for a year. I killed 2 stock clutches and then went to a six puck clutch and went through 3 020's in two months. The engine still ran fine, with stock HG, and stock head bolts. I only got rid of the car because it had some serious cancer, and body damage. In fact Iirc Dave @ Passenger Performance still has the engine as a long block in his shop. As many members here will tell you I beat that engine everyday.
Heat kills these motors more then anything else. Imho three things that NEED to be watched in order for the motor to survive at what ever fueling you can get out of a stock pump are: 1. Excessive EGT's, 2. High water temps, 3. High oil temps. An aux oil cooler, and an intercooler, go a long way on those, but egt's still need to be watched closely.
But you are absolutely right, if you don't know what you are doing, this recipe can melt your motor. It also is the recipe for power.
bringing this back up to the top...
i just got a manual boost controller and i want to install it, so i can turn up the fuel and the boost at the same time.
for fuel, im only going to mess with the star wheel, probably start with one full turn and take it from there...ive already turned the boost pin
as far as the boost controller goes, i just want to double check the vacuum line that i need to T into beforehand.
heres a pic i stole from another thread
the line pictured here is the one i need to T into, correct?
bringing this back up to the top...
i just got a manual boost controller and i want to install it, so i can turn up the fuel and the boost at the same time.
for fuel, im only going to mess with the star wheel, probably start with one full turn and take it from there...ive already turned the boost pin
as far as the boost controller goes, i just want to double check the vacuum line that i need to T into beforehand.
heres a pic i stole from another thread
the line pictured here is the one i need to T into, correct?
BAM! yea man thats the line you want to tap into. it's the only line going to the wastegate :wink:
Yeah, that black rubber hose is nice and ripe for snipping (one cut somewhere in the middle). You don't want to "T" into it, though, it should look like this:
image link if the above picture does not showIn the middle of the picture is a manual boost controller in brass colour, with a red sticker. Just below it is the turbo wastegate. The black hose running to the left of the boost controller goes to the compressor housing.
If you use a "T" in the rubber hose between the compressor housing and WG, then the boost will still travel from the compressor housing directly to the wastegate so your boost controller won't do anything.
BAM! yea man thats the line you want to tap into. it's the only line going to the wastegate :wink:
thats what i figured, just wanted to make sure before i chopped it up
its kind of hard to see it at night in my garage
I've been thinking about this a bit lately. If one were to disconnect their wastegate, and let the turbo boost to whatever it wants, without making any fueling changes, you'd be using up whatever leftover fuel is available, netting in a small power increase (and clean exhaust!). So say you do this and you're getting 15psi or whatever. If you make small changes to the fueling, therefore increasing your boost, you still should be running pretty lean because the boost is still limited by the fuel available. So instead of cranking up the fueling and then limiting the boost, and having all this fuel left over (black smoke) creating high egt's, you do it the other way around and you're assured cooler EGT's, because any extra fuel would be automatically soaked up by extra boost anyway. Does this make any sense?
Here's a very similar model:
http://www.diesel-speed-shop.com/index_fichiers/Page3663.htmFrench but the pictures are fine... note that the T goes in-line with the wastegate hose and then runs to the needle valve.
Some people do the same thing with aquarium tees and valves. Basically you're bleeding wastegate pressure to trick the wastegate into thinking the turbo is not putting out as much pressure as it really is.
I've been thinking about this a bit lately. If one were to disconnect their wastegate, and let the turbo boost to whatever it wants, without making any fueling changes, you'd be using up whatever leftover fuel is available, netting in a small power increase (and clean exhaust!). So say you do this and you're getting 15psi or whatever. If you make small changes to the fueling, therefore increasing your boost, you still should be running pretty lean because the boost is still limited by the fuel available. So instead of cranking up the fueling and then limiting the boost, and having all this fuel left over (black smoke) creating high egt's, you do it the other way around and you're assured cooler EGT's, because any extra fuel would be automatically soaked up by extra boost anyway. Does this make any sense?
i have mine this way...
still some smoke as the turbo is not spooling but when spooling it will clear.
if i add more fuel it will start to smoke,even on boost range...
I've been thinking about this a bit lately. If one were to disconnect their wastegate, and let the turbo boost to whatever it wants, without making any fueling changes, you'd be using up whatever leftover fuel is available, netting in a small power increase (and clean exhaust!). So say you do this and you're getting 15psi or whatever. If you make small changes to the fueling, therefore increasing your boost, you still should be running pretty lean because the boost is still limited by the fuel available. So instead of cranking up the fueling and then limiting the boost, and having all this fuel left over (black smoke) creating high egt's, you do it the other way around and you're assured cooler EGT's, because any extra fuel would be automatically soaked up by extra boost anyway. Does this make any sense?
I have mine this way right now with only some RPM mods, and a really cut fuel pin, on a hard pull I can hit ~30psi, nice and clear the only time it smokes is if I lug it, keep the rev's up and it is nice.
One other note: In my expericance it is better to run the boost line from the manifold to the boost controller to the wastegate, it helps smooth boost spikes and drops a ton. Then just take and plug the line coming from the turbo.
I've been thinking about this a bit lately. If one were to disconnect their wastegate, and let the turbo boost to whatever it wants, without making any fueling changes, you'd be using up whatever leftover fuel is available, netting in a small power increase (and clean exhaust!). So say you do this and you're getting 15psi or whatever. If you make small changes to the fueling, therefore increasing your boost, you still should be running pretty lean because the boost is still limited by the fuel available. So instead of cranking up the fueling and then limiting the boost, and having all this fuel left over (black smoke) creating high egt's, you do it the other way around and you're assured cooler EGT's, because any extra fuel would be automatically soaked up by extra boost anyway. Does this make any sense?
i have mine this way...
still some smoke as the turbo is not spooling but when spooling it will clear.
if i add more fuel it will start to smoke,even on boost range...
my wastegate is stuck shut, and really the smoke depends on how you have your lda set.