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A buddy's TT car ran a little lean ...


Fullthrottleguy
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Ever wonder what happens when a fuel injector gets clogged under boost .... its costs more than a yearly injector cleaning

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If the car has been sitting all summer and no one ran HEET or stabil through the engine before putting the car away ....

its a good thing to get the injectors cleaned and balanced

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Edited by Fullthrottleguy
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33 minutes ago, Fullthrottleguy said:

Ever wonder what happens when a fuel injector gets clogged under boost .... its costs more than a yearly injector cleaning

PUBLIC SERVICE ANNOUNCEMENT

If the car has been sitting all summer and no one ran HEET or stabil through the engine before putting the car away ....

its a good thing to get the injectors cleaned and balanced

IMG_2932.thumb.jpeg.46b15d456e6da4e42c58e4a5022a9dd5.jpegIMG_2930.thumb.jpeg.2645431d4a3f282182064d5b76a3a918.jpeg

Now, if you could only get parts.

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Im gonna say no.  if it was plugged it was plugged. no amount of trim is gonna fix that.  most trims are limited to some %, so there would not be enough trim available in the first place (in drag racing anyway). 

 

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i bought a cheap injector flow test stand its in glamis just so i could check my injectors....   my last trip i usually run it low on gas and put 5 gallons of 110 in and take a quick run dont know if it actually helps tho

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20 hours ago, richard h said:

Now, if you could only get parts.

TRUE - Pistons are 12 weeks out, faster to get therm custom made, thats only 6 weeks but 30% more $$

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5 hours ago, Fullthrottleguy said:

TRUE - Pistons are 12 weeks out, faster to get therm custom made, thats only 6 weeks but 30% more $$

ouch i got custom pistons from diamond berfore covid and it took 6 weeks   good luck 

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On 11/20/2021 at 12:51 PM, Sausage450r said:

Just weld that piston up and throw it back in 😂

Ummm, JB weld is much faster, let's get real!!! 

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On 11/20/2021 at 12:42 PM, Jersey_Jeff73 said:

now if it was running closed loop with a wide band o2 sensor do you think it would of adjusted enough to save the engine ????

Just one injector partially clogged will still be a problem with a single O2 per bank. It’ll see it’s leaner and fatten up all 4 cylinders, but there would’ve been 3 fat eye watering cylinders and 1 melter, just a little farther from camp. :biggrin:

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On 11/20/2021 at 12:42 PM, Jersey_Jeff73 said:

now if it was running closed loop with a wide band o2 sensor do you think it would of adjusted enough to save the engine ????

No not all. You only have 1 or two O2 sensors. It could never add fuel to one cylinder unless you theoretically had 8 sensors and even then it would have to have the ability to trim individual cylinders and no one would set up a trim that could compensate for huge changes like a plugged injector

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we had 8 WBO2's on the 903 in our pro mod & if we fired up all 8 @ once, the heaters would almost kill the motor.  we put a switch in to kill 4 of them, to get them hot & then fire up the other 4. 

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1 hour ago, Bobalos said:

Not even close to how expensive it is now......

He has been 5.5's @ >270 MPH, in KnewBlue.

 

Knew Blue 1.jpg

Ed is fast for sure, he blew that intake apart his new intake is a work of art. 

F191113A-76DC-4499-9D65-3000751B3D2F.jpeg

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Yea that was @ the HRR some time ago.  it was a bad day for sure.  We learned a lot from that incident. 

Im kind of surprised he let you take a picture of it.  they have some secrete squirrel chit going on inside it so that the hole to hole trims are right next to nothing & @ those airflow numbers that is not an easy thing to do.  One thing we learned that I would have never guessed............ a burst panel for a blower car is not the same as a burst panel for a turbo car even if they are rated @ the same "burst pressure".  

Interesting bit of trivia........... the 903 in the first picture I posted was Pat Musi's personal motor from his stratus (that he crashed).  He & Lepone were very good friends. 

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12 hours ago, John@Outfront said:

No not all. You only have 1 or two O2 sensors. It could never add fuel to one cylinder unless you theoretically had 8 sensors and even then it would have to have the ability to trim individual cylinders and no one would set up a trim that could compensate for huge changes like a plugged injector

I'm not running sequential and i leave the holley at 100 percent learn just wondering being batch fired if it wound grab enough fuel from the other cylinder's to keep it from melting down

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No and if you get an O2 that is bad or drifting due to dirt it's going to trim the whole motor wrong, potentially by a bunch. 

Jmho, but that is the beauty of alpha-n.  Dial it in and leave it alone.  

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