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04-16-2009, 08:47 AM
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Club Cobra Member
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Join Date: Feb 2006
Location: Knoxville,
TN
Cobra Make, Engine: Ford F100; 496 Shelby, MassFlo, BlueThunder, Kee-Al-TopLoader, Detroit Locker
Posts: 84
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Not Ranked
What a learning curve! Bless you for hanging in there. I'm curious whether Keith and company are going to endorse the Dynatek product?
Scott
__________________
Super Chief
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04-16-2009, 06:10 PM
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CC Member
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Join Date: Feb 2001
Location: St. Louis, Missouri,
MO
Cobra Make, Engine: SPO 2715
Posts: 1,648
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Not Ranked
Quote:
Originally Posted by Scott M Jackson
What a learning curve! Bless you for hanging in there. I'm curious whether Keith and company are going to endorse the Dynatek product?
Scott
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Scott, Thanks for the kind words. You would have to ask Keith about what he thinks. I am still running out the car, and general operation of the car is great.
Rod,
I know enough to be dangerous.
I "originally" did not want to learn about the fuel injection, but as I get into the tuning of the car I can tell you that it isn't THAT hard.
I am doing homework right now to find out what ECU would do the best job of managing the system, and then switching over. I am sure the harness will need changes, but more where it connects to the ECU, since the inputs (O2, throttle sensor, etc...) are already in place.
If anyone has thoughts on the ECU's, this would be a good place to post them!
E
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04-17-2009, 05:56 AM
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CC Member
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Join Date: Feb 2001
Location: St. Louis, Missouri,
MO
Cobra Make, Engine: SPO 2715
Posts: 1,648
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Not Ranked
more info
Okay,
I jumped into SPF 2715 this morning at 5:30 (it was in the garage), with St. Louis weather at 45 degrees. The garage is not heated, but is insulated.
Turned the key, motor fires right up! Back up car out of garage, and realized I set the garage door opener on the lawn tractor, so I jumped out of the Cobra and walked in to get the opener.
On the way back it struck me....The car is still running! It was "camming" along at 800 rpms, puffing white exaust (it's cold out), but the d@mn thing is running!
I have had carb'd hot rods and race cars almost my entire life, and I do not think any of them ever did, or ever could have run like that without warming up.
The drive to work (10 miles, half interstate, half not) was fantastic, car ran like a champ.
It does have a stumble between 1st and 2nd on a "harder shift", but it repeats so I think that is just a tune adjustment.
More to follow, I am getting my lipstick cam recorder set up, and there will be vids.
E 
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04-27-2009, 06:13 PM
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CC Member
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Join Date: Feb 2001
Location: St. Louis, Missouri,
MO
Cobra Make, Engine: SPO 2715
Posts: 1,648
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Not Ranked
Shelbyfest 2009!
So I rolled out to the Shelbyfest in Hermann Missouri on Saturday, and thought some of you might like to see these two pictures..
Now 2715 has 340 miles on it, and I am getting to understand my induction system
Eric
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04-27-2009, 06:44 PM
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Senior Club Cobra Member
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Join Date: May 2007
Location: San Clemente,
CA
Cobra Make, Engine: CSX 4758, CSX 381 Keith Craft 482 w/ Weber 48 IDA's
Posts: 492
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Not Ranked
Way to go Eric! More miles, more miles. Then you might also get to hunt down oil leaks that make you crazy.....just clicked over 6200 on mine.
Tom
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04-27-2009, 08:43 PM
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CC Member
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Join Date: Feb 2001
Location: St. Louis, Missouri,
MO
Cobra Make, Engine: SPO 2715
Posts: 1,648
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Not Ranked
Quote:
Originally Posted by rokndad
Way to go Eric! More miles, more miles. Then you might also get to hunt down oil leaks that make you crazy.....just clicked over 6200 on mine.
Tom
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I hope the next project is a re-designed, bigger gas tank. EFI likes fuel pressure un-interrupted, and the stock SPF gas tank would appear to be flat on the bottom inside.
Guess what happens on 1/4 tank and letting loose 666 lb-ft???
The gas gets scared and runs to the back of the gas tank!
Thanks for the kind words Tom!
E
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04-27-2009, 08:47 PM
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Senior Club Cobra Member
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Join Date: Oct 2006
Location: Santa Cruz,
CA
Cobra Make, Engine: SPF 2613 Titanium w/Black, Roush 402SR
Posts: 4,098
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Not Ranked
Quote:
Originally Posted by Great Asp
So I rolled out to the Shelbyfest in Hermann Missouri on Saturday, and thought some of you might like to see these two pictures..
Now 2715 has 340 miles on it, and I am getting to understand my induction system
Eric
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Roll the credits...Eric's (Great Asp's) Superformance - FE Build is officially done!   
__________________
Doug
No stop signs, speed limit - Nobody's gonna slow me down - Like a wheel, gonna spin it
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04-28-2009, 06:16 AM
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CC Member
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Join Date: Feb 2001
Location: St. Louis, Missouri,
MO
Cobra Make, Engine: SPO 2715
Posts: 1,648
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Not Ranked
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04-28-2009, 07:47 AM
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Senior Club Cobra Member
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Join Date: Oct 2006
Location: Santa Cruz,
CA
Cobra Make, Engine: SPF 2613 Titanium w/Black, Roush 402SR
Posts: 4,098
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Not Ranked
Quote:
Originally Posted by Great Asp
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Just kidding...this thread has been a "best seller" on CC. I guess we're in to part II of the series, when Eric's (Great Asp's) Superformance takes to the streets to embarrass Corvettes and Ferraris. 
__________________
Doug
No stop signs, speed limit - Nobody's gonna slow me down - Like a wheel, gonna spin it
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04-30-2009, 12:43 PM
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CC Member
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Join Date: Nov 2006
Cobra Make, Engine: ERA, FE BBF
Posts: 389
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Not Ranked
Quote:
Originally Posted by Great Asp
Scott, Thanks for the kind words. You would have to ask Keith about what he thinks. I am still running out the car, and general operation of the car is great.
Rod,
I know enough to be dangerous.
I "originally" did not want to learn about the fuel injection, but as I get into the tuning of the car I can tell you that it isn't THAT hard.
I am doing homework right now to find out what ECU would do the best job of managing the system, and then switching over. I am sure the harness will need changes, but more where it connects to the ECU, since the inputs (O2, throttle sensor, etc...) are already in place.
If anyone has thoughts on the ECU's, this would be a good place to post them!
E
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Check out the FAST XFI system. Its got good software, its relatively easy to tune, not overly expensive and has many useful options. I recently used the fast XFI on an ERA cobra with a TWM system on a 482 FE motor and got good results. Check out our website for more information on the car and the EFI setup on it:
http://www.anitafred.net/Cobra.htm
You can also see our build thread on this system for more information on the FAST XFI:
ERA 753 - Final Assembly in Progress
Let me know if you have any questions about the FAST system or EFI in general. We've build two cars with EFI (the other one is a 1963 Blown and Injected Corvette - see my gallery or the website for some pics) and I am hooked. Don't think I'd do another performance street machine without EFI.
- Fred
Last edited by fkemmerer; 06-17-2009 at 07:12 PM..
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04-30-2009, 02:16 PM
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CC Member
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Join Date: Feb 2001
Location: St. Louis, Missouri,
MO
Cobra Make, Engine: SPO 2715
Posts: 1,648
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Not Ranked
Thanks!
Fred,
Thanks!
The Cheif Tuner for Dynatek told me "the software must contain a very important offset for bringing in extra fuel against throttle position". I really think I will need to review all options when I get ready to change the ECU out. I am guessing that will be at the end of this years driving weather.
But first the gas tank.
The standard SPF unit needs help. The best I can tell it has no baffles, and no sump. I may fab a surge tank with a seperate pump and return to the main tank, or fab a bigger, new tank with a surge area. The standard unit is fine for a carb based system, but EFI needs pressure and a half full tank of gas in my car has the gas in the back of the gas tank when I take off under throttle, and the fuel pump cavitates, then the Dynatek system is "unhappy", which pisses off my motor 
E
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05-01-2009, 07:23 AM
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CC Member
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Join Date: Nov 2006
Cobra Make, Engine: ERA, FE BBF
Posts: 389
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Not Ranked
Quote:
Originally Posted by Great Asp
Fred,
Thanks!
The Cheif Tuner for Dynatek told me "the software must contain a very important offset for bringing in extra fuel against throttle position". I really think I will need to review all options when I get ready to change the ECU out. I am guessing that will be at the end of this years driving weather.
But first the gas tank.
The standard SPF unit needs help. The best I can tell it has no baffles, and no sump. I may fab a surge tank with a seperate pump and return to the main tank, or fab a bigger, new tank with a surge area. The standard unit is fine for a carb based system, but EFI needs pressure and a half full tank of gas in my car has the gas in the back of the gas tank when I take off under throttle, and the fuel pump cavitates, then the Dynatek system is "unhappy", which pisses off my motor 
E
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You are smart to get your fuel system into shape before upgrading the rest of the system. Baffles are a good idea. You do not absolutely need a sump as long as you have decent baffles and you keep you tank at least 3/8 full or more. I don't have a sump on my Cobra as it would show from the back of the car. I do have one on my corvette. The thing to watch is that you don't plumb the return into the tank too close to the pickup line as the agetation caused by the returning fuel will then to send air into the pickup line if they are too close. Its also a good idea to have whomever modifies the tank for a return install a tube that causes the return fuel to come out near the bottom of the tank where it will be covered by fuel. This will also help avoid agetation and air getting into the pickup line. You will probably need to install larger lines to and from the tank to a regulator in the engine bay to ensure that you can hold a constant fuel pressure at all engine loads.
- Fred
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05-01-2009, 08:37 AM
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CC Member
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Join Date: Feb 2001
Location: St. Louis, Missouri,
MO
Cobra Make, Engine: SPO 2715
Posts: 1,648
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Not Ranked
Quote:
Originally Posted by fkemmerer
You are smart to get your fuel system into shape before upgrading the rest of the system. Baffles are a good idea. You do not absolutely need a sump as long as you have decent baffles and you keep you tank at least 3/8 full or more. I don't have a sump on my Cobra as it would show from the back of the car. I do have one on my corvette. The thing to watch is that you don't plumb the return into the tank too close to the pickup line as the agetation caused by the returning fuel will then to send air into the pickup line if they are too close. Its also a good idea to have whomever modifies the tank for a return install a tube that causes the return fuel to come out near the bottom of the tank where it will be covered by fuel. This will also help avoid agetation and air getting into the pickup line. You will probably need to install larger lines to and from the tank to a regulator in the engine bay to ensure that you can hold a constant fuel pressure at all engine loads.
- Fred
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Great info Fred!
I really think I am going to build a bigger gas tank, and you are spot on with the return line. They installed mine right next to the pick-up
I will check the line size, but it is pretty big right now.
I need a gas tank ex-spert....  
Thanks again Fred!
E
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