putting TT's on an older deisel got some fuel questions
#1
![Default](https://www.performancetrucks.net/forums/images/icons/icon1.gif)
we are going to start fabbing a TT kit for my buddies older N/A chevy deisel- he has full bolt ons and we where wondering how the computer will know when to add more fuel- he is going to get a wideband a/f ratio guage- what should a deisel run @ as far as a safe a/f ratio????
mainly we want to know how to add more fuel to accomadate the twin holset garrett t04e 60trims...
mainly we want to know how to add more fuel to accomadate the twin holset garrett t04e 60trims...
#2
How do I change this text
iTrader: (26)
Join Date: Jan 2005
Location: Behind the TIG welder
Posts: 7,294
Likes: 0
Received 2 Likes
on
2 Posts
![Default](https://www.performancetrucks.net/forums/images/icons/icon1.gif)
Originally Posted by 02Vortech
we are going to start fabbing a TT kit for my buddies older N/A chevy deisel- he has full bolt ons and we where wondering how the computer will know when to add more fuel- he is going to get a wideband a/f ratio guage- what should a deisel run @ as far as a safe a/f ratio????
mainly we want to know how to add more fuel to accomadate the twin holset garrett t04e 60trims...
mainly we want to know how to add more fuel to accomadate the twin holset garrett t04e 60trims...
As far as the PCM "knowing" it needs more fuel. You will need to tell it. With bigger injectors, or more fuel pressure, etc.....
Diesel engines work much differently than gas.....
Gas you control the RPM with a valve in the intake. IE a throttle blade, or carb.
A Diesel is controlled by fuel. You want it to go faster you give it more fuel. So in reality, only Diesels have "Gas pedals" ("Fuel Pedals"), Gas engines have a "Throttle valve controller pedal", or a "Intake air Pedal"...........
#7
![Default](https://www.performancetrucks.net/forums/images/icons/icon1.gif)
If it's an older 6.5L then I'd probably not waste too much money on it. Not because they aren't decent motors....but because they can't handle the power that non-turbo/turbo diesels that followed it do. Brother has a Tahoe with a 6.5L TD and I've done quite a bit of research on it. Basically the motor is nearly maxed out from the factory....some performance gains to be had but nothing like the PSD's, Cummins, and Duramax's get.
Trending Topics
#8
On The Tree
Join Date: Mar 2006
Location: Danville, Indiana
Posts: 181
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.performancetrucks.net/forums/images/icons/icon1.gif)
Blown 333 is right, sorry but you should leave that one alone. The fuel system can't produce enough fuel pressure or volume to make bigpower and it won't last if you try to. You would have to upgrade the injection pump, injectors, exhuast, intake system, heads, lift pump, valvetrain, so on and so forth... You would be better off to try a cummins conversion or a duramax swap.
#9
TECH Fanatic
iTrader: (9)
Join Date: Jan 2003
Location: Temple, TX
Posts: 1,647
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.performancetrucks.net/forums/images/icons/icon1.gif)
Easiest thing to do would be to spray some propane. Your best A/F gauge for a diesel is your tailpipe.. No smoke means you're too lean (which is a good thingin a diesel), thick black cloud of death means you're too rich (not good for a diesel). A light haze is usually what you want to have. As far as the computer goes, normally there is a MAP sensor that tells the ECM how much boost there is, however since you're starting out with a N/A, I dont think the one on your truck will read into boost. Best bet would be to try and find a ECM out of a turbo 6.5L.
The 6.5L injection pump insnt that hard to modify if you find the right person who knows what they are doing. You could also hone out the injectors, but EGT control would be a big issue with doing that. A good starting point for the fuel system is a high pressure/ high volume transfer pump, like a FASS system..
The 6.5L injection pump insnt that hard to modify if you find the right person who knows what they are doing. You could also hone out the injectors, but EGT control would be a big issue with doing that. A good starting point for the fuel system is a high pressure/ high volume transfer pump, like a FASS system..
#10
On The Tree
Join Date: Mar 2006
Location: Danville, Indiana
Posts: 181
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://www.performancetrucks.net/forums/images/icons/icon1.gif)
Originally Posted by TchargedLS1TA
Easiest thing to do would be to spray some propane. Your best A/F gauge for a diesel is your tailpipe.. No smoke means you're too lean (which is a good thingin a diesel), thick black cloud of death means you're too rich (not good for a diesel). A light haze is usually what you want to have. As far as the computer goes, normally there is a MAP sensor that tells the ECM how much boost there is, however since you're starting out with a N/A, I dont think the one on your truck will read into boost. Best bet would be to try and find a ECM out of a turbo 6.5L.
The 6.5L injection pump insnt that hard to modify if you find the right person who knows what they are doing. You could also hone out the injectors, but EGT control would be a big issue with doing that. A good starting point for the fuel system is a high pressure/ high volume transfer pump, like a FASS system..
The 6.5L injection pump insnt that hard to modify if you find the right person who knows what they are doing. You could also hone out the injectors, but EGT control would be a big issue with doing that. A good starting point for the fuel system is a high pressure/ high volume transfer pump, like a FASS system..
![The Judge](https://www.performancetrucks.net/forums/images/smilies/LS1Tech/gr_judge.gif)