Stupid Question (Beginner!)
Thread Starter
Joined: Jul 2006
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From: Capac MI
Stupid Question (Beginner!)
I got a Dumb Question But...... I Heard Diesels Dont make Vacuum, But im not for sure. Right now im just Second guessing myself. Is it true that they dont and how do the get the air to mix with the fuel? Vacuum Pump and if so why the intake valve? If they do make vacuum like a regular gas V8 Then im sorry to waist your time. Thankyou
Postmaster
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In Powerstroke engine the fuel is injected straight into the cylinder, the air and fuel do not mix until they are into the cylinder. The turbo injects air into the cylinder then just the air is compressed and then the fuel is injected into the compressed hot air and since the air was heated to such a degree the fuel instantly explodes. Thats why diesels have a very high compression rate compared to a gasoline engine. It does have a vacumm pump for the HVAC controls and for ESOF hubs. The brakes is done by a hydroboost system. I beilieve that on the 94-97 stroker, the brakes worked off the vacuum pump. Im not sure about the 94-97 but i think that they were. Diesels do not create boost.
Elder User
Joined: Aug 2006
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From: Mountaintop, PA
John 311t,
32lbs what are your egt's at? Thats a lot of boost on a stock turbo, even in 02 form. Refer to your other post about my comment on your new turbo . I wouldnt be wringing that engine out at 32lbs of boost until i get the oil analysis done. You may want to baby it until then. Just to be careful.
32lbs what are your egt's at? Thats a lot of boost on a stock turbo, even in 02 form. Refer to your other post about my comment on your new turbo . I wouldnt be wringing that engine out at 32lbs of boost until i get the oil analysis done. You may want to baby it until then. Just to be careful.
Postmaster
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My egts are climbing towards 800 post turbo, i do not let them hold at 32 lbs, i let off. I normally run with the wastegate plugged in about 25 lbs. Now that you made a good point about the motor possibly being dusted i will not be beating on it anymore until the OA is done.
Post Fiend
Joined: Jul 2005
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From: 21791
Here Mike look at this page on how a diesel engine works. There is no throttle body, and no vacuum. The turbocharger supplies a little bit more air than the engine needs at idle, so it is always at or close to 14.7psia.
http://auto.howstuffworks.com/diesel.htm
http://auto.howstuffworks.com/diesel.htm
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Thread Starter
Joined: Jul 2006
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From: Capac MI
Hey thankyou, Im getting the guages of course, What are the normal EGT's and also if i do put a chip on it with the stock exhaust how much will my Temps rise?? Thankyou all very much for your help
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Not a liberal...
Joined: Jul 2006
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From: Cut & Shoot, Texas
I don't know if I would chip a truck with stock exhaust. You will be amazed at how fast and high those EGTs can go up. You need to be able to get that hot exhaust out of the truck fast and efficiently.
Thread Starter
Joined: Jul 2006
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From: Capac MI
ok thankyou, The reason i asked is because a friend of mine had the 7.3 and bought a 6.0 So he told me 75 Bucks. Im not sure who makes it or what it is. He said that it had 3 Settings and they pulled a bulldozer on a goosneck like nothing 75 miles an hour up a high way and it didnt miss a beat.
Not a liberal...
Joined: Jul 2006
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From: Cut & Shoot, Texas
I did my mods one at a time so that I could see what each one added to the truck. First was guages so I could see what the baseline was. Next was the exhaust. I could see right away EGTs that were about 150 degrees cooler (65 mph, 2000 rpms). Next I did the intake and chip. With the chip in stock position my EGTs are very easy to control but when I crank it up.....I have to pay attention.
You could try it but be very careful and watch that pyro. Before I chipped my truck I never really thought the EGTs were a big deal but on the first test drive after the chip installation I became fully aware of what everyone was talking about. I am just not sure a stock exhaust could dissipate that heat fast enough. I could be wrong though.
You could try it but be very careful and watch that pyro. Before I chipped my truck I never really thought the EGTs were a big deal but on the first test drive after the chip installation I became fully aware of what everyone was talking about. I am just not sure a stock exhaust could dissipate that heat fast enough. I could be wrong though.
Thread Starter
Joined: Jul 2006
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From: Capac MI
I have the Airaid Air box with the K&N Filter.. Will that drop the EGT's Any? Also i think he said the lowest tune was around 20 HP. Will that really hurt it with the stock system. Or can i take off the muffler and straight pipe it. Will that lower it too?
Not a liberal...
Joined: Jul 2006
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From: Cut & Shoot, Texas
Your intake should be helping to bring cooler air in faster so yes, it should help a little with the EGTs. Taking the muffler off and straight piping should also help as there is less restriction to exhaust flow that way.
Hopefully someone else with a little more experience with a set up like that will chime in. I am not an expert by any means and am still on the learning curve myself.
Hopefully someone else with a little more experience with a set up like that will chime in. I am not an expert by any means and am still on the learning curve myself.
Post Fiend
Joined: Jun 2006
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From: Central, Al
Unless you are going to be meticulus in cleaning that K&N you might want to change filter media for that intake. Dry/Dirty K&N = dusted Turbo.
You will deffinately want to open that exhaust up for a tune. Muffler delete will help but for the higher HP/Smoke tunes that DP Has you will want a larger exhaust Downpipe and all. Find out the name of that chip someone around here will probably have experience with it.
You will deffinately want to open that exhaust up for a tune. Muffler delete will help but for the higher HP/Smoke tunes that DP Has you will want a larger exhaust Downpipe and all. Find out the name of that chip someone around here will probably have experience with it.