PICS! Turbo Granny Car **now w/Dyno Video**
- Thread starter NCTaurusSHO
- Start date
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Jonny Cash
Good boy
:laugh_ti: You guys are funny.
1995SHO9
FLEES ARE COMIN
Of course!
Axianator
I am a banana!
No, although Josh T. of SHO NUT fame has managed to achieve the same result in his blower car by hitting excessively rich AFRs for extended periods of time. The last time I assisted Tony in tuning El Toro, we successfully massaged his calibration to achieve WOT AFRs of around 12.5:1. Unfortunately, we have not yet had time to work out the bugs in his idle and part throttle programming.
FWIW, I agree with Jason on this. Although it's not a highly publicized fact, running an excessively rich fuel mixture can be just as damaging to an engine as running that same engine with an overtly lean fuel mixture. Unless you have a unique configuration that would dictate otherwise, I would not recommend commanding AFRs richer than 12:1 on a V6 SHO engine, regardless of operating mode.
1995SHO9
FLEES ARE COMIN
I pm's Toolman to have him respond to why he choose to have the a/f as he did. I don't know enough about tuning to say why we did YET. So I'm going to wait until he responds. I don't want to say anything that is incorrect. But I trust his tuning totally and if he tells me it is safe, I have the uttermost faith in what he says.
~Johnathon~
~Johnathon~
There have been plenty of FI SHO's last for some time at boost levels as high as 18psi on stock internals. Not that I would recommend it, but it has been done. That said, he already has forged pistons, which I think he plans on installing in the not too distant future. We gave him an overly safe tune, and he should be able to boost 11psi for the life of the car.
We can't really tune this car like one would tune Tony's setup. If he had forged pistons, proper intake charge cooling, a properly sized turbocharger, and if we had more than a few hours at midnight in the rain to play with the tune, and if he was familar enough with the Tweecer to make needed changes, I would have no problem shooting for 12:1 AFR. But we had none of those luxuries. Since we were unable to datalog due to both laptops having problems, we had no idea what his intake air temps were. I suspect, what with the undersized IC and not entirely efficient turbocharger (at least as regards it's application in a SHO engine), that they were on the high side. And seeing as he is 1000 miles away, and that I had no desire to blow up his engine again, we shot for a very safe mixture, with very safe timing.
His setup has a lot more potential, and his tune has a long way to go. Our goal that night was simply to get it to run acceptably, and to get John and Brian started on their way to being comfortable enough with the Tweecer to make the needed adjustments in the future. Once we researched the MAF and inputed the proper curve, the only change we made to our initial Tweecer settings was to increase the injector slope. I impressed upon John (hopefully) that this tune is far from finished, that there is plenty more power available, and that he needs to become intimately familar with the Tweecer and how his car reacts to fine tuning.
That said, the car ran pretty darn good. I'll gladly err on the rich side for an initial break-in tune than on the lean side. Once he gets his forged pistons in, and after he gets a proper intercooler, we can dail in some more timing and less fuel.
1995SHO9
FLEES ARE COMIN
Dooood!!! Now he has to change his boost level LOL.
J/K.
Done!!!!! J/King
Nooooooooooooooooooooo, he meant to say 4 psi
"pay no attention to the man behind the curtain"
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1995SHO9
FLEES ARE COMIN
Update: First of all I want to thank Matt for coming over tonight and helping me with physically changing stuff on the tweecr and sitting down with me and explaning stuff to help me better understand shit on it. I'd also like to thank Tim for offering his advice over the phone.
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But tonight we worked on the idle air fuel. Before it was around 12:5 and then it would start going lower and lower and then the idle would start hunting.
Now after messing with it tonight we got it to hold around 14.3 steady for as long as the car is sitting. I can once more drive in the city without haing to keep my foot on the gas and keep playing with it.
I'm also really excited with the kind of traction I'm getting. Unless I purposely try to get it to spin, It won't even break loose with the good tires I have on there now in 2nd gear.
So I'm really optimisic that I'm going to run some kick ass times in the 1/4 mile this coming year. WOO HOO!!!
~Johnathon~
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But tonight we worked on the idle air fuel. Before it was around 12:5 and then it would start going lower and lower and then the idle would start hunting.
Now after messing with it tonight we got it to hold around 14.3 steady for as long as the car is sitting. I can once more drive in the city without haing to keep my foot on the gas and keep playing with it.
I'm also really excited with the kind of traction I'm getting. Unless I purposely try to get it to spin, It won't even break loose with the good tires I have on there now in 2nd gear.
So I'm really optimisic that I'm going to run some kick ass times in the 1/4 mile this coming year. WOO HOO!!!
~Johnathon~
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sho2see
sho2see
good to hear that jonathon cant wait for another drag meet and see you run this time.
I'm glad to hear you're getting a lot more done with this project. Still a long way from finished though. 
1995SHO9
FLEES ARE COMIN
I'm glad to hear you're getting a lot more done with this project. Still a long way from finished though.
I truely am. After talking to Tim, I think I'm goign to hold off putting the forged pistons in until this motor blows. Then I'll add Meth injection and crazy boost. But that is all in the future, and hopefully by then, there will be a better solution for the tranny problem.
~Johnathon~
Don't go blowing this engine on purpose now...
1995SHO9
FLEES ARE COMIN
Don't go blowing this engine on purpose now...
Trust me my friend, I'm not planning on it.........
yet...
But once I get the money for the forged build, I am curious to see what the blowing point is on the sho engine.
~Johnathon~
Talk to Scott, he's done it a few times. Has the melted pistons to prove it.Trust me my friend, I'm not planning on it.........
yet...
But once I get the money for the forged build, I am curious to see what the blowing point is on the sho engine.
~Johnathon~
I recall James trying it not too long ago also, but he was using a bottle
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1995SHO9
FLEES ARE COMIN
Who is this Scott? Does he have the remote turbo? If he melted them he leaned out then.
I mean I'm thinking as long as you avoid leaning it out and detonation, you should be fine. But the second it detonates under high boost, I'm thinking its done....
I mean once I have the money to go though with the low comp build (have all the parts, just need to put them in), I'm honestly thinking if I pull enough tiing and push the shit out of the injectors, I can hit 450 whp. However, I've been told the stock fuel lines are going to fail around 400whp?? We'll see, I'll deffinatly post about it.
~Johnathon~
I mean I'm thinking as long as you avoid leaning it out and detonation, you should be fine. But the second it detonates under high boost, I'm thinking its done....
I mean once I have the money to go though with the low comp build (have all the parts, just need to put them in), I'm honestly thinking if I pull enough tiing and push the shit out of the injectors, I can hit 450 whp. However, I've been told the stock fuel lines are going to fail around 400whp?? We'll see, I'll deffinatly post about it.
~Johnathon~
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Well, he certainly melted some pistons, but he was a long way from the blowing point of the engine.
If that were the case, your power would ONLY be limited by your injector size.
I'd say 17 - 18 PSI used very ******* stock pistons is a "blowing point" of the motor. Since the motor DID blow, would you say it was the "blowing point" of the steering wheel then?
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I'd say 17 - 18 PSI used very ******* stock pistons is a "blowing point" of the motor. Since the motor DID blow, would you say it was the "blowing point" of the steering wheel then?
It is the blowing point of the stock pistons, but the other components of the engine can certainly take a LOT LOT more.
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