cheap performance upgrades??
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Junior User
Joined: Jul 2003
Posts: 65
Likes: 0
cheap performance upgrades??
hey guys!
im new to this diesel stuff. and could post in many forums and have learned ALLOT from this site
anyways, i can get all way up to a whopping 80Mph ooo ahh!!
I am looking to make better performance on the cheap for my old diesel truck
its an all Stock 83 250 6.9L 4x4 3sp Auto 190K still runs good but wanting more of course!!
what can i do?/ what to buy to make it perform better? any basics to all diesels for improvements?
after the engine/ exhaust i need to work on the front axle uhh!! $$$$
o well first things first
thanx allot guyzzz
Mrc
im new to this diesel stuff. and could post in many forums and have learned ALLOT from this site
anyways, i can get all way up to a whopping 80Mph ooo ahh!!
I am looking to make better performance on the cheap for my old diesel truck
its an all Stock 83 250 6.9L 4x4 3sp Auto 190K still runs good but wanting more of course!!
what can i do?/ what to buy to make it perform better? any basics to all diesels for improvements?
after the engine/ exhaust i need to work on the front axle uhh!! $$$$
o well first things first
thanx allot guyzzz
Mrc
Cargo Master
Joined: Nov 2003
Posts: 2,585
Likes: 1
From: Duluth, Mn.
5" is over kill on a 6.9/7.3
3" is plenty for a NA
4" if your turbo'd
Turning up the pump is not, just something you can do. It takessome tuning to get it right. Involves, fuel timing & fuel delivery. I'll recomend a Pyrometer before you start tinkiering with it.
I've never heard of larger injectors for a 6.9
3" is plenty for a NA
4" if your turbo'd
Turning up the pump is not, just something you can do. It takessome tuning to get it right. Involves, fuel timing & fuel delivery. I'll recomend a Pyrometer before you start tinkiering with it.
I've never heard of larger injectors for a 6.9
Cargo Master
Joined: Nov 2003
Posts: 2,585
Likes: 1
From: Duluth, Mn.
A pyrometer is just a fancy name for an exhaust temp sensor.
It allows you to monitor your exhaust gas temps, EGT's.
If you just turn up the pump, without monitoring the EGT's your in serious danger of melting down the engine. EGT's of over 2100 degree's are eventually fatal to an engine.
More fuel= more heat. You'll be riding a thin line between performance and engine failure
It allows you to monitor your exhaust gas temps, EGT's.
If you just turn up the pump, without monitoring the EGT's your in serious danger of melting down the engine. EGT's of over 2100 degree's are eventually fatal to an engine.
More fuel= more heat. You'll be riding a thin line between performance and engine failure
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Postmaster
Joined: Jun 2003
Posts: 2,656
Likes: 5
From: shepherd
i am no diesel expert but i figured there were bigger injectors for all diesels. but still a 3 - 5 inch exh. would be loud . start it right after the manifold if it fits
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Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 16
From: Nutter Fort, WV
A 6.9 adding a three inch exhaust starting at where the pipes come together from the manifolds is a great performance boost.
A straight thru muffler will make it loud, but help it breathe better, AKA run better.
It will have a loud rap at highway speeds and upon deceleration it will really crack over 2000 RPM's
When you turn the fuel up it is real easy to go to far. Then you will be replacing rings a lot sooner than you want to.
The pyrometer is essential to turn up the fuel so you do not melt the pistons.
1250 degrees is where things start melting, your engine will be junk by 1500
I run my pyrometer in the exhaust maniflod before it gets to the tailpipe flange.
I am installing my new 7.3 turbo motor tomorrow at a little under 260,000 due to turning up the fuel to much, But then I work my truck a little harder than most people do. Check out my photo's and you will see.
A straight thru muffler will make it loud, but help it breathe better, AKA run better.
It will have a loud rap at highway speeds and upon deceleration it will really crack over 2000 RPM's
When you turn the fuel up it is real easy to go to far. Then you will be replacing rings a lot sooner than you want to.
The pyrometer is essential to turn up the fuel so you do not melt the pistons.
1250 degrees is where things start melting, your engine will be junk by 1500
I run my pyrometer in the exhaust maniflod before it gets to the tailpipe flange.
I am installing my new 7.3 turbo motor tomorrow at a little under 260,000 due to turning up the fuel to much, But then I work my truck a little harder than most people do. Check out my photo's and you will see.
