F-150 Manifold Testing/Journey

[K4fxd]

I'm bored, so am looking at dyno graphs. Everything I am finding shows the two manifolds to be equal from 5500 to 6500 where they both peak.

If I can find a manifold cheap I'd do the swap just for something to do. If it is faster, great. If not, time for an 18 manifold, and a set of 3.73's or 3.90's if I can find them.

I'm in ky and our roads are narrow, hilly and very twisty, so the added bump in TQ will be a welcome thing. Even at the expense of a couple of tenths or MPH in the quarter. BUT if the dyno graphs I am finding are true, I should gain a tenth or three and stay at the same MPH

If the manifold works, that is cheaper than a set of gears.

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[BmacIL]

I'm bored, so am looking at dyno graphs. Everything I am finding shows the two manifolds to be equal from 5500 to 6500 where they both peak.

If I can find a manifold cheap I'd do the swap just for something to do. If it is faster, great. If not, time for an 18 manifold, and a set of 3.73's or 3.90's if I can find them.

I'm in ky and our roads are narrow, hilly and very twisty, so the added bump in TQ will be a welcome thing. Even at the expense of a couple of tenths or MPH in the quarter. BUT if the dyno graphs I am finding are true, I should gain a tenth or three and stay at the same MPH

If the manifold works, that is cheaper than a set of gears.

Truck manifold peak is 5500 on oem headers. With long tubes there are a few that dynoed at 5800-6000 for peak (pay attention to other mods listed when looking at dyno graphs). It drops like a rock above 6000. Stock 15-17 manifold has rated power peak at 6750, though some dynos show more like 6500, and the drop off is milder. Still a 1000 rpm difference. 18 GT manifold peaks at 7100-7200 and has very little drop off. There's a massive power difference above 7000.

Not my car, but 18GT vs 15 GT on same car, CAI being only mod besides 93 tune.

 

[WildHorse]

Not if the guy running 1000 rpm lower is making 40 more ft/lbs. of torque. Torque is what gets a car moving from a dead stop or from low speed. On a road course there are typically 12 - 15 corners to come out of and maybe 2 -3 straight aways. They guy making more torque will have 5 times as many opportunities to gain ground vs. the top end guys who depend primarily on straight-line speed.

On a 1/4 drag strip; the CJ, 2018 GT, or GT350 manifolds would be the ones to get.

On the street or a road course, the F-150 manifold is the one to get.

So many things wrong here. First and most important TORQUE never won anything. Horsepower does. And not just in drag racing. Period. But hey.. I understand some of you's wanna go from a 40mph roll in 4th gear. Oh yes I forgot, no racy, you want more torque down low so you can.. ummm.. well.. I dunno why. Cause auto trans will automatically downshift for you, manual trans you drop a gear, sooooo that must mean you wanna it to just stay in 4th gear without shifting to pass who you want on the way to your 9-5, while towing 10,000 lbs and running outta steam before 6 grand.

As Far as making 40 more ft pounds, 1000 rpm lower from where? Normal stock peak of 4500? Well that's fine. Cause the dude coming off the corner is hanging around 6000 rpm and is still gonna blow right by you with your 40 foot pounds more at 3500 and all outta boogie by 5800.

 

[K4fxd]

I'm finding all kinds of conflicting info. No way to really compare apples to apples.

I wish VMP had included the 17 GT manifold trace in their manifold video. I think I'll call them Monday and ask for a copy to be emailed to me. At least that would be a true comparison.

Makes me wonder what they are hiding, maybe the 17 GT manifold worked better than it should? Was it worse then the truck? In the VId he states there was no real difference between the truck and gt.

I fully believe the truck manifold will not perform as good as the gt but I would like a true comparison.

 

[Momogt26]

All of the intakes have there use depending on what you want out of your car.

 

[WildHorse]

I'm finding all kinds of conflicting info

No conflicting info. Your gonna go slower with these intake manifolds, when comparing APPLES to APPLES. Those running no tunes are kidding themselves, those running tunes there tuner optimized it for low end grunt. Dyno's are tuned truck intake vs stock tuned 15-17 manifold, which, IMO the 15-17 is the BEST intake to around 6700 rpm. Tons of 'low end'. This stuff makes me laugh. Kinda like those that say a ported 18+ manifold will make more power than the KIng Daddy Cobra Jet intake manifold.

 

[Bluemustang]

No conflicting info. Your gonna go slower with these intake manifolds, when comparing APPLES to APPLES. Those running no tunes are kidding themselves, those running tunes there tuner optimized it for low end grunt. Dyno's are tuned truck intake vs stock tuned 15-17 manifold, which, IMO the 15-17 is the BEST intake to around 6700 rpm. Tons of 'low end'. This stuff makes me laugh. Kinda like those that say a ported 18+ manifold will make more power than the KIng Daddy Cobra Jet intake manifold.

I can at least understand the argument about the ported 18 manifold, provided that you are not shifting beyond 7500 rpm. But I get your point. The CJ is the king daddy. I prefer the 18 manifold because of some of the hurdles required to run the CJ and use it optimally to 8000 rpm and beyond.

 

[K4fxd]

The problem I have is in order to keep my car in the powerband on the roads I drive on I have to be in 2nd gear. The engine is screaming and I can be heard for miles.

IF the manifold does indeed give more torque till 5500 and stays with the 17 GT manifold to 6500 it is a win win for me. I go to a TT twice a year so drag times are not really my concern. There are a couple of mustang tuners in my area who have dynos, so getting the truck manifold dialed in will not be a problem.

The truck manifold with a dyno tune is still cheaper than a set of gears and miles cheaper than FI.

IF VMP had included the 17 GT manifold numbers in their "shoot out" these posts of mine would not be here.

Also it appears Ford redesigned the truck manifold to run at higher RPM's in 2018, that is the manifold I want to try.
If I wanted to street race I go with a purpose built longblock with twin turbos and a full chassis.

 

[WildHorse]

stays with the 17 GT manifold to 6500

It won't stay with the GT manifold, it's two completely different designs. Put it this way:

2015 - 2017 Ford F-150 387 lb-ft @ 3,850 rpm
2015 - 2017 Ford Mustang 400 lb-ft @ 4,250 rpm

You really think a 400 rpm between peaks is the end of the world? All that means it the torques with the F150 manifold is dropping off quicker than the GT manifold. Also the GT manifold will make 350+ lbs-ft from 1300 - 4000 rpm. How much more do you need for those 3rd gear to pass? This is just some friendly advice to try and save you's some cash. Goto LUND, get a ngauge & tune, and it'll pull like a freight train from off idle all the way to 6700. part throttle, WOT, whatever. Otherwise run what ya want.

 

[K4fxd]

The cams and compression are also different.

You may be 100% correct. I'm one of those people who like to try things and not take someone's word for it. Had VMP showed the 17 GT manifold's curve I wouldn't be wondering. It doesn't cost any extra to put it up with the others. Makes me wonder what they are hiding.

That was an Apples to Apples comparison, Same motor, same day, same dyno, same dyno operator.
The operator stated the gt and truck manifolds were the same up top. Why not show the trace?

 

[WildHorse]

The operator stated the gt and truck manifolds were the same up top. Why not show the trace?

Cause there trying to sell you a tune for a manifold that WON'T BEAT A STOCK GT MANIFOLD.
Anyways.. run what you brung, I'm out. Cheers.

 

[K4fxd]

They are not trying to sell a tune for the truck manifold. Either the 17 GT manifold is great or it is crap. Maybe the 17 gt manifold beat the 18.

Like I said they did not show it.

Advance to 7:54

 

[bootlegger]

E85 is 15 miles away.

Same here. It's worth the drive.

 

[BmacIL]

The cams and compression are also different.

You may be 100% correct. I'm one of those people who like to try things and not take someone's word for it. Had VMP showed the 17 GT manifold's curve I wouldn't be wondering. It doesn't cost any extra to put it up with the others. Makes me wonder what they are hiding.

That was an Apples to Apples comparison, Same motor, same day, same dyno, same dyno operator.
The operator stated the gt and truck manifolds were the same up top. Why not show the trace?

The airflow physics says otherwise.

 

[Momogt26]

The problem I have is in order to keep my car in the powerband on the roads I drive on I have to be in 2nd gear. The engine is screaming and I can be heard for miles.

IF the manifold does indeed give more torque till 5500 and stays with the 17 GT manifold to 6500 it is a win win for me. I go to a TT twice a year so drag times are not really my concern. There are a couple of mustang tuners in my area who have dynos, so getting the truck manifold dialed in will not be a problem.

The truck manifold with a dyno tune is still cheaper than a set of gears and miles cheaper than FI.

IF VMP had included the 17 GT manifold numbers in their "shoot out" these posts of mine would not be here.

Also it appears Ford redesigned the truck manifold to run at higher RPM's in 2018, that is the manifold I want to try.
If I wanted to street race I go with a purpose built longblock with twin turbos and a full chassis.

Get whatever intake you like my friend it's your car. I have a 2017 f150 intake on my 15 gt A6 with 3.15 and I love it. No I'm not going to out run a stock gt intake or any after market intakes. And really don't care but my car performs the way I like it. Also must tuners will not tune these because it's not all out upper rpm power but I can tell you the f150 intake works better when tuned. I us hp tuner and got a 2017 f150 file and used it as a platform to tune the imrc and adjust shift points to shift in the power band on the intake. I have a 2018 f150 intake I will be testing soon. Im just sharing some information not trying to convince anyone that this is the way to go but this is a thread about f150 intake swaps and wish the comparison to other intakes be left out

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