it's alive
Nov 20, 2004 | 05:11 PM
#11
Originally Posted by 900Z1
Hea Jim how far are you from Fort Riley Kansas?
My son is out there healing up from being in an explosion
in Iraq. I would send you some cash to take my son a ride in the 408.
I told him how quick your truck was and he thinks I was Stretching the truth
about your 10.92 run
My son is out there healing up from being in an explosion
in Iraq. I would send you some cash to take my son a ride in the 408.
I told him how quick your truck was and he thinks I was Stretching the truth
about your 10.92 run
Man I was all pumped to hear how the 408 was going..... someone needs to light a fire under their ***.... people are waiting 
Nov 20, 2004 | 05:12 PM
#12
Originally Posted by 02-4.8
Raise the boost as high as you can, get the biggest shot of nitrous you can. Take it to the track and pray it all holds togeather for 1 run. Claim the fastest 4.8 in world 
Nov 20, 2004 | 09:16 PM
#15
I believe that this is the site for that product. I believe it is also free (you have to build everything yourself. I.E. circut boards and such) http://www.megasquirt.info/
I read a few pages of it, it seems really cool. Just haven't had the time to read all of it and think about it.
Jeff
I read a few pages of it, it seems really cool. Just haven't had the time to read all of it and think about it.
Jeff
Thats too cool I need pics of the final product.
Nov 21, 2004 | 04:36 AM
#19
Thread Starter
single digit dreamer
iTrader: (6)
Joined: Mar 2002
Posts: 9,743
Likes: 2
From: omaha ne
seriously long post here.
It’s alive again. As you can see from the current time it took awhile. First thing I must do is thank Scott for helping me all night. He is a hard core gear head and computer geek. Scott showed up with a mostly complete mega squirt but had to finish making the main harness so I started working on the truck. I mounted the mega, cut a hole in the fire wall, put in a couple of sensors. By then he was done with the harness and I started putting it in. I pretty much did the install by my self with scott directing me and would say I had about 4 hours in it total. That is with soldering most of the splices nicely and dressing it up pretty good.
First sensors were the intake air temp and coolant temp. we got both sensors with pig tails at local parts stores. I put the coolant one in the open hole in the passenger head and the IAT right in the elbow going into the intake. One wire out from the mega to each sensor and the other lead from each sensor to ground.
For throttle position it was just one wire from the mega to the throttle body. We also needed a switched hot, a wire to the tach pick up, a wire to the wideband output and he also wired in a bunch of future wires. There is a 5v out for future along with a timing control wire and at least 4 generic output wires. They can be used for lots of stuff like fans, fuel pump, nitrous control, boost control, alkey control.
The last thing to wire was the injectors. There are 2 drives in the mega squirt. I left the hot wire hooked to each injector and cut the other. Then hooked each driver wire to 4 injectors. The mega has a built in map that can read up to 22psi. A vacuum line had to be ran to the unit. I guess you can run a map that will go much higher and I may have to step up sometime.
We were smoking up to this point but when we tried a test we couldn’t get a tach signal for some reason. Scott thought it might be the firm ware or the soft ware or the flaky usb to serial adapter or or or….. Well after checking everything more than once we decided it must be the tach signal coming off of the truck. I really don’t know what scott was doing at this point but he hooked up an extra wire and a resistor to the tach wire and somehow got it to read. It took us awhile to get the resistor just right.
I will put up some screen shots of the tuning screens tomorrow, it is very cool. 3d VE tables that you can adjust on the fly!!! That has to be the coolest feature there is. Let me explain what this means. As you are driving the mega plots your rpm and map for you and does it over your VE settings. You can see what number it is using at that time. Then you look at the wideband and see if it is rich or lean and just click that section of the map up or down. Boom, your fueling changes right there. A few clicks at light throttle, a few at moderate, a few at ¾, a few at WOT. Pretty soon you have a completed map. Like I said WOT was super easy.
There are fuel tuning features for many other things to help dial in the drive ability stuff. It will be easier to just post up screen shots of that tomorrow. I was set on hooking up the ignition part of the mega but now I am not sure. The only reason I can think of doing it is for convenience since I have edit and can control timing with that. With mega you can have up to 3 maps (timing and fuel) and pick which map you want on the fly. This would kick *** if you wanted timing changes when you swapped over to race gas, you could put a switch somewhere and select the map without having a pc hooked up. I am definitely going to use those other outputs, the nitrous control screen is BAD ***.
There are lots of cool screens like that nitrous one.
Now for price. I would estimate there are about $300 in parts, these things show up as a pile of resistors and stuff and an empty project box. There is tons of info at the mega site but I find it kind of hard to sort out. There is just soo much info there. There is quite a bit of time in putting it all together and making it look professional. Scott was talking about assembling a few complete kits and selling them, he was guessing something like $600 but that just seems too cheap to me. He has a lot of time in each unit. He was just kind of thinking out loud and I noticed he tends to underestimate things so it is really hard to say what the cost might end up at.
As it sits now I am ready for some huge low impedance injectors when ever I can afford them and should be able to control fueling up to 22psi. I think it will be awhile before I see 22psi. Can you even imagine 22psi on a 408? I am going to see what happens when I unhook the maf sensor. The stock pcm may freek or may not even care. I would like to get rid of it. Then see if I can get that nitrous part hooked up. Probably play with the part throttle tune a little but we will have to start all over with the 408 so probably wont get too crazy on it.
Now for how the 4.8 runs. I got up to 51 lb’s peek at about 6000rpm thru exhaust at 9psi, I need to turn my shift points down. It really drives nice. The boost seems to build just as fast. Not real laggy at all. With much less boost and 1.2L less displacement it is quite a bit slower. I am pretty sure it is in the 13’s. someplace.
It’s alive again. As you can see from the current time it took awhile. First thing I must do is thank Scott for helping me all night. He is a hard core gear head and computer geek. Scott showed up with a mostly complete mega squirt but had to finish making the main harness so I started working on the truck. I mounted the mega, cut a hole in the fire wall, put in a couple of sensors. By then he was done with the harness and I started putting it in. I pretty much did the install by my self with scott directing me and would say I had about 4 hours in it total. That is with soldering most of the splices nicely and dressing it up pretty good.
First sensors were the intake air temp and coolant temp. we got both sensors with pig tails at local parts stores. I put the coolant one in the open hole in the passenger head and the IAT right in the elbow going into the intake. One wire out from the mega to each sensor and the other lead from each sensor to ground.
For throttle position it was just one wire from the mega to the throttle body. We also needed a switched hot, a wire to the tach pick up, a wire to the wideband output and he also wired in a bunch of future wires. There is a 5v out for future along with a timing control wire and at least 4 generic output wires. They can be used for lots of stuff like fans, fuel pump, nitrous control, boost control, alkey control.
The last thing to wire was the injectors. There are 2 drives in the mega squirt. I left the hot wire hooked to each injector and cut the other. Then hooked each driver wire to 4 injectors. The mega has a built in map that can read up to 22psi. A vacuum line had to be ran to the unit. I guess you can run a map that will go much higher and I may have to step up sometime.
We were smoking up to this point but when we tried a test we couldn’t get a tach signal for some reason. Scott thought it might be the firm ware or the soft ware or the flaky usb to serial adapter or or or….. Well after checking everything more than once we decided it must be the tach signal coming off of the truck. I really don’t know what scott was doing at this point but he hooked up an extra wire and a resistor to the tach wire and somehow got it to read. It took us awhile to get the resistor just right.
I will put up some screen shots of the tuning screens tomorrow, it is very cool. 3d VE tables that you can adjust on the fly!!! That has to be the coolest feature there is. Let me explain what this means. As you are driving the mega plots your rpm and map for you and does it over your VE settings. You can see what number it is using at that time. Then you look at the wideband and see if it is rich or lean and just click that section of the map up or down. Boom, your fueling changes right there. A few clicks at light throttle, a few at moderate, a few at ¾, a few at WOT. Pretty soon you have a completed map. Like I said WOT was super easy.
There are fuel tuning features for many other things to help dial in the drive ability stuff. It will be easier to just post up screen shots of that tomorrow. I was set on hooking up the ignition part of the mega but now I am not sure. The only reason I can think of doing it is for convenience since I have edit and can control timing with that. With mega you can have up to 3 maps (timing and fuel) and pick which map you want on the fly. This would kick *** if you wanted timing changes when you swapped over to race gas, you could put a switch somewhere and select the map without having a pc hooked up. I am definitely going to use those other outputs, the nitrous control screen is BAD ***.
There are lots of cool screens like that nitrous one.
Now for price. I would estimate there are about $300 in parts, these things show up as a pile of resistors and stuff and an empty project box. There is tons of info at the mega site but I find it kind of hard to sort out. There is just soo much info there. There is quite a bit of time in putting it all together and making it look professional. Scott was talking about assembling a few complete kits and selling them, he was guessing something like $600 but that just seems too cheap to me. He has a lot of time in each unit. He was just kind of thinking out loud and I noticed he tends to underestimate things so it is really hard to say what the cost might end up at.
As it sits now I am ready for some huge low impedance injectors when ever I can afford them and should be able to control fueling up to 22psi. I think it will be awhile before I see 22psi. Can you even imagine 22psi on a 408? I am going to see what happens when I unhook the maf sensor. The stock pcm may freek or may not even care. I would like to get rid of it. Then see if I can get that nitrous part hooked up. Probably play with the part throttle tune a little but we will have to start all over with the 408 so probably wont get too crazy on it.
Now for how the 4.8 runs. I got up to 51 lb’s peek at about 6000rpm thru exhaust at 9psi, I need to turn my shift points down. It really drives nice. The boost seems to build just as fast. Not real laggy at all. With much less boost and 1.2L less displacement it is quite a bit slower. I am pretty sure it is in the 13’s. someplace.
Nov 21, 2004 | 08:36 AM
#20
TECH Junkie
Joined: Mar 2003
Posts: 3,271
Likes: 0
From: Katy, TX
I'm surprised the 4.8 turns the turbo so well. You ever want to sell that 4.8? Im just looking ahead for my Blazer. I'm going for a 402 this summer with a bigger cam and Patriot stage 2 heads. Then hopefully i can talk cmotorsports out of a set of piping since i already have everything else.