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- Jaxson
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- 2015 mustang gt
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- #2
i use to run 91 on a procharged 2015 at 10psi then i went to 18 psi so i added water/meth
stanger1
Well-Known Member
My sig shows my mods, but on 91, I must run alittle bit of Boostane, otherwise I see some knock on my NGauge.
Only takes 3-4 oz per tank and it does make a difference watching knock on nGauge. I am around 10Lbs boost, 82mm pulley.
Only takes 3-4 oz per tank and it does make a difference watching knock on nGauge. I am around 10Lbs boost, 82mm pulley.
OP
OP
Veteran
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- Thread starter
- #5
Thanks for reply. I expected 6 to 8 psi safe on pure 91 .
if you are seeing some knock at 10 on pure 91 it’s probably very seldom or light ?
im not very fond of additives.
As I can’t get good gas nearby, I’ll probably sticks to low boost or fit a water meth. ( which I’m trying to avoid)
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stanger1
Well-Known Member
On the Boostane, I am not a rep or get anything for free, but when I find a Product that performs like it's suppose to, I am in and this stuff works.
Check them out. Lots of info on Youtube, vendor website, etc.
IMO.
Check them out. Lots of info on Youtube, vendor website, etc.
IMO.
hlfbkd420
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My 19 with a Roush P2 on it runs 91. It's all I can get that's readily available. My car is normally at 11.5PSI under boost. Probably pushing around 650whp.
- Joined
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- #8
I did pull alittle timing but allowed the knock sensors to bring timing back up if better fuel was available.
I’m as dependable as I can get. Built engine, fuel system, dual stage water/meth. Good guess, car made 892 at 16.8psi not been dyno on 18psi yet
engineermike
Well-Known Member
Can you share more details about this combination?
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S550AC11
Well-Known Member
Whipple Stage 2 3.875 pulley, ARH 1 3/4 headers, Corsa sport 3" is really it for power mods. Other than that I focused on light rotating parts, aluminum flywheel, driveshaft, eradispeed rotors and 50lb street rear wheel/ tire combo. This could have affected numbers some but I'm not sure. I was expecting right at 700 and 550 ish torque on 91
96gt4.6
Well-Known Member
643 RWHP, Stage 1 (750HP) Whipple GEN3/2.9L Kit here. Advertised 9psi (reads 9psi on the stock gauge, but some say that's not accurate). Car is entirely stock with cats and everything.
2 years, almost 10k miles of fun on the setup so far. All we have here is 91 Octane, although I run a sip of Boostane at the dragstrip simply because going roundy-round making passes in 100 degree summer heat, I prefer a little safety margin against knock.
2 years, almost 10k miles of fun on the setup so far. All we have here is 91 Octane, although I run a sip of Boostane at the dragstrip simply because going roundy-round making passes in 100 degree summer heat, I prefer a little safety margin against knock.
engineermike
Well-Known Member
What are you folks running at the track on 91?
96gt4.6
Well-Known Member
These were made last September, 3k ft corrected D/A, all stock and using the supplied Whipple tune. It needs more tire, could probabaly do 10s if I put something with a sidewall under it. I couldn't foot brake more than 1800 ish without wheelspin.
OP
OP
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It’s probably a very nice daily ? Very quick, yet has some manners .
If you could get E85, would you jump at it or keep as is ?
A lot of owners seem to think the 600 to 700 hp is a good sweet spot for a street mustang ? What’s your opinion ?
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