TD header, tune & afpr question

[0degC]

315hp would be pushing my particular sled to the edge. Stock primary secondary, teenie weenie intercooler. Fleecer, 17 psi vs 20 psi which one will hold up on a lake for a long pull?
IDK?!?!

Won’t be much difference in those tunes if you have stock waistgate actuator. You likely won’t make much past 18lbs. The flow of the header overcomes the stock waistgate spring. Depends on muffler also I assume you have a free flowing one making some power. As someone else mentioned coolant temp is what to watch and this can be hard at WOT lol.

 

[Doc Harley]

Won’t be much difference in those tunes if you have stock waistgate actuator. You likely won’t make much past 18lbs. The flow of the header overcomes the stock waistgate spring. Depends on muffler also I assume you have a free flowing one making some power. As someone else mentioned coolant temp is what to watch and this can be hard at WOT lol.

OdegC, how right you are. From everything I've read the MS17 is a big hit. When I'm ready to flip the switch (315hp) I'll probably add a shim to w.g. not to be confused with " whack a mole' hahaha....sorry

 

[Doc Harley]

As Bob Marley sang..."Every little thing...is gonna be alright.

 

[0degC]

OdegC, how right you are. From everything I've read the MS17 is a big hit. When I'm ready to flip the switch (315hp) I'll probably add a shim to w.g. not to be confused with " whack a mole' hahaha....sorry

TD’s fancy controlled waist gate works really nice if you want to run your max 20 tune or above. But get your wallet $$ back out

 

[Doc Harley]

TD’s fancy controlled waist gate works really nice if you want to run your max 20 tune or above. But get your wallet $$ back out

I'll know more tomorrow. Lol. But I'm definitely not getting a wastegate. That's a promise. Might consider p.s. Adulting is not my thing, I'm doing my best....

 

[DMCTurbo]

I'll know more tomorrow. Lol. But I'm definitely not getting a wastegate. That's a promise. Might consider p.s. Adulting is not my thing, I'm doing my best....

I'll sell you a wastegate and boost controller i have laying around. Heck your this far now you may as well keep going.

 

[Doc Harley]

So, gave PowerTrail a try to get this hoedown started. Sleds out of control. Suspension will need to get sucked down a bit more. Acceleration comes in harder faster then I could have imagined. Sorry Fatchance, you were right. Lol.
The only thing I'm questioning is a wot AFR 11.0?? I assume she's fat! Should I try to dial down fuel pressure?
30°F outside.

 

[Doc Harley]

NO! 11.0 to 1 AFR at WFO at 18-20psi boost is not rich!
IMO.
I would increase the fuel pressure and shoot for high 11s AFR up to 12.0 to 1
I have had to increase my fuel pressure on my sled to maintain safe AFRs at WFO.
If you are not data logging you need to be with all the other performance mods you have done.
Here is a sample of one of my logs. Notice the closed loop fuel multiplier is adding 11% additional fuel over and above me having the increased fuel pressure .

View attachment 177302

Bob, do you mean lower fuel pressure to achieve AFR to 12.0? Just double-checking Bob.
305hp is pure evil. I can't wait to tame that beast lol.
Yep, Scott Taylor stopped by to give me a hand. Yes, that Scott Taylor.
Him and I went over belt temps as the belt is running 160°f+
Deep into the primary temps are 170°f+ and the secondary is approximately 140°f+

 

[sideshowBob]

LOL
I deleted my post as it was completely wrong! LOL
Too early for me today.

11.0 to 1 AFR is a little rich but safer.
My sled was running lean at well over 12 to 1 even with the closed loop at WO.
I had to increase the Fuel Pressure on my sled to bring the AFR under 12 to 1
If you don't have data logging I would suggest you get it.

 

[Doc Harley]

LOL
I deleted my post as it was completely wrong! LOL
Too early for me today

It's ok Bob. I have those days myself. More then I'd care to admit. Thank you.

 

[Doc Harley]

Question....
My AFR is 11.0 at 47psi fuel pressure @ WOT.
What is a good starting point for fuel pressure to achieve 12.0 AFR?

 

[Turboflash]

Question....
My AFR is 11.0 at 47psi fuel pressure @ WOT.
What is a good starting point for fuel pressure to achieve 12.0 AFR?

Turn it down about 1-2 lbs. Continue to watch AFR.