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2016 mustang gt upgraded but feeling slow!? Anyone else?

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JaymesLannan

JaymesLannan

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406hp to wheels on 91. Not bad. E85 it is!
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AlmostFamous

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A dyno tune will give you your answer. Without one, we can only speculate.
 

AZ18yote

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Dont forget here in AZ we dont have real e85 for the most part its flex fuel ie e54. Still way better than our 91 and definitely worth the tune. As soon as you upgrade your injectors and tune for ff you'll be much happier.
 
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JaymesLannan

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Dont forget here in AZ we dont have real e85 for the most part its flex fuel ie e54. Still way better than our 91 and definitely worth the tune. As soon as you upgrade your injectors and tune for ff you'll be much happier.
That is what i was thinking too. Are you running on e85? I just dont want to get the tune when i know there are rarely any gas stations in phoenix that have e85 or even e54. Just feeling a bit stuck lol. I think headers is really my last ditch effort for power out here.
 

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I have no experience with VMP's tune, but I can tell you that my AED tune was night and day different in pull above 4500-5000 rpm, and the way it doesn't fall off hard above 7000 created the biggest gap. It was so much that a friend who was going to wait to tune or do anything for a while, immediately started ordering parts to do the tune + manifold after driving my car. Have they verified that the harnesses and IMRCs are working correctly? I've only driven/ridden in '18 manifold swap cars with lockouts. All had a similar feel.
 

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AZ18yote

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That is what i was thinking too. Are you running on e85? I just dont want to get the tune when i know there are rarely any gas stations in phoenix that have e85 or even e54. Just feeling a bit stuck lol. I think headers is really my last ditch effort for power out here.
I run a flex tune but am on the e54/flex fuel 99% of the time with only swapping in a tank of 91 every 3-4 months for lubrication reasons. However, if I were doing a road trip I would not be stuck and could just fill up with 91 if needed. Flex tune is your best bet so can utilize e when avail but can swap as needed.
 

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The 18 manifold needs you to rev it out. That, and you're likely knock limited by the fuel. Try good 93 or E85.
 

IPOGT

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Can I make an honest suggestion? Why not rent a Kia rio and then drive your Mustang. You'll save yourself a fortune.
 

VikingJoe

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Intake, '18 manifold, cat deletes and e85 tune here.

Night and day difference from stock, especially when I wrap it out to 8k. She puts quite a few car lengths on stock 15-17 GT's.
 

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F-150 intake manifold, cat deletes, and a Flex Fuel tune will make a street car feel much more alive due to a noticeable torque increase in the usable RPM for a street car.

Yep, peeps like to poo-poo the F-150 manifold, but it will deliver a 25-40 ft/lbs increase across a huge RPM range that most street cars inhabit, and the '18 GT intake manifold only shines at high rpm. You need to ask yourself at what RPM range(s) do you drive your car the most? While I don't know about you, but my car spends much more time between 2,500 to 5,500 rpm than it does at 7500 rpm.

Food-for-thought...
 
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F-150 intake manifold, cat deletes, and a Flex Fuel tune will make a street car feel much more alive due to a noticeable torque increase in the usable RPM for a street car.

Yep, peeps like to poo-poo the F-150 manifold, but it will deliver a 25-40 ft/lbs increase across a huge RPM range that most street cars inhabit, and the '18 GT intake manifold only shines at high rpm. You need to ask yourself at what RPM range(s) do you drive your car the most? While I don't know about you, but my car spends much more time between 2,500 to 5,500 rpm than it does at 7500 rpm.

Food-for-thought...
Because at 2500 to 3500 rpm most people are usually in traffic. If you want low/mid range grunt, use an E85 tune, not a truck manifold. Otherwise, these engines are made to rev out and the power band is all up top. 18 manifold and set rev limiter to 8100, shift at 7500-7600. It's glorious and pulls hard all the way up strong to that range and it's been proven to be the best overall with only the GT350 slightly edging it at the very top end.

Sounds like you need a pushrod motor otherwise.
 

AZ18yote

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It’s getting warmer out folks. Cars are not as peppy in 85 degree air as 45 degree air.
85 would be amazing the next couple of months. Queue 100+ until mid to late October now lol.
 

Zelek

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85 would be amazing the next couple of months. Queue 100+ until mid to late October now lol.
Just funnel one of your AC vents into the air dam of your intake. Done! Cold air intake!
 

AZ18yote

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Just funnel one of your AC vents into the air dam of your intake. Done! Cold air intake!
Brilliant! Iat no higher than that of inside the cabin :)
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