Model year 18 and up F150 manifold VS GT 350 Manifold

[K4fxd]

If you were an asshat in my other thread I have blocked you.

Bolted on the GT 350 manifold today. It takes more throttle to get the same acceleration as with the F150. I can definitely feel an increase in HP above 6500. However this did not result in a decrease of 0 to 60 times. The F mani was consistently 4.5 with no traction, I had to feather the throttle but I could repeat the 4.5 at will.

The 350 mani is slower by .2 giving me consistent 0 to 60 times of 4.7. I was able to mat it off idle and got no real tire spin, concrete. I have not been able to do 1/4 or 1/8th mile testing as of yet.

EDITED to add, the 17 GT manifold I was able to get consistent 4.6 0 to 60 times.

The F manifold was .1 ET and .5 Mph slower in the 1/8th than the original 17 GT manifold. Nothing I care about as the low and midrange was lots better as evidenced by the 0 to 60 Mph times.

I shifted the F mani at 6600 for best results and right now I've got the 350 mani shifting at 7400.

I can't wait for a track to open so I can get a side by side comparison.

I'm doing this because I want a more torque oriented engine without losing top end. So I'm comparing these manifolds one is HP tuned and one is Tq tuned. I want to figure out what I like best on the street. I thought I'd do some acceleration testing just to see how much the F manifold gives up. So far it gives up nothing to the 15-17 GT manifold and is quicker than the 350 manifold to 60Mph.

I will update this thread as I get new information

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[Momogt26]

Great testing keeps us up-to-date

 

[kevinvan6000]

Are you using draggy to monitor times? Any chance of 60-130 data?

 

[tw557]

Thanks for the update. I finally got my VMP tune installed today on my 16 with an 18 airbox. The improvements are pretty darn good. Part throttle is more responsive. Mid range torque is a bit better. And the top end pull to 7000 is definitely better.

I started to buy into the idea of the 18 GT manifold recently. I really feel I have no interest at all. I will only feel the gain in 2 gears. 1st and 2nd. I'm 100 mph in 3rd at 6800. Not into loosing my license or worse.

Turns out I'm pretty satisfied with torque right now but I'm positive I will try the truck intake sometime too. I like more torque in ALL gears. Vmp did tell me they will work with me for the truck manifold especially with the valves active. All other tuners very bluntly shut the idea down.

Maybe I'll dabble with the hptuner myself one day too.

 

[K4fxd]

I just did a 70 to 120 pull and it came in right at 7 seconds. Now this is on E85

I only did 60 to 100 pulls with the F150 manifold and it was 4 seconds and that was on 93 gas.

At 6600 I was pulling 41 Lbs of air through the maf sensor on the truck manifold and 43 Lbs with the 350 mani at the same 6600 RPM. But again the truck was on gas and the 350 was on E85. Air conditions were close at 200 feet above sea level for the F150 and 300 for the GT 350 mani.

I will switch back to gas and do more pulls. I wanted to test my Flex tune and it does bring back midrange. I'll do some 0 to 60's in a day or so. I also tuned for the 350 manifold by studying GT350 Factory tunes. I tuned the F150 manifold by studying the truck tunes. Without a dyno or track I can only guess that I got it correct.

 

[K4fxd]

That 3rd gear pull to 7400 RPM was fun but I think I will go back to the truck manifold due to it being much more pleasant to drive on the freeway and back roads. I don't have to down shift at every hint of hill.

The E85 helped but at 2.68 a gallon it is much more expensive than 93 time I figuer gas miliage. F150 mani and 93 got me 24 avg city freeway the e gets me 17 on the freeway ride home from the E85 pump. Stoich locked in at 10.2.

.50 cent spread in price today.

 

[tw557]

I would definitely try e85 but closest station is 1 HR away. So the truck is a fair amount better then the 16 manifold? Same topend but stronger bottom and mid?

 

[K4fxd]

So the truck is a fair amount better then the 16 manifold? Same topend but stronger bottom and mid?

The truck manifold is much better up to 6500 then the MY 16 GT manifold takes a slight edge. From my logs it is 10 HP down at 6700. I'll know for sure when I get it to a track.

The stock 6R80 shifts at 6700

 

[Torinate]

Thanks for the update.
I’m looking forward to track tests for sure.
I would think the 60-130 would favour the freer breathing / higher revs of the GT350 mani. But day to day “street” driving the F would look to feel better in those situations.
Just my 2 cents though...

thanks. Well done!

 

[K4fxd]

I would think the 60-130 would favour the freer breathing / higher revs of the GT350 mani.

I did a 70 to 120 and it pulls like a freight train to 7400, It might pull to 7600 if I redo the shift points.

The MY 17 GT manifold falls on it's nose about 6700, same with the MY 18 truck manifold.

 

[Torinate]

I did a 70 to 120 and it pulls like a freight train to 7400, It might pull to 7600 if I redo the shift points.

The MY 17 GT manifold falls on it's nose about 6700, same with the MY 18 truck manifold.

Yea this is it. The speed is so high that you’re staying in gears longer. Taking the Revs to 7600 with the 350 mani I would think would be the ticket for the 60-130 or the quarter mile where you will spend the most time above 7000. The issue in daily driving though is that you rarely have these opportunities to do just that. And it’s the DD where I would think the higher torque in the lower revs would feel better. It’s a balance. How do you drive and where do you drive.

 

[K4fxd]

How do you drive and where do you drive.

I drive on twisty old country roads where the speed limit is mostly 35 or 45. I also drive on the interstate. I'm in KY so I have many hills.

With the 17 GT manifold the trans was shifting constantly. I have only driven on the freeway with the 350 mani but I expect it will want to be in lower gears like the 17 GT, unless running E85.

The issue in daily driving though is that you rarely have these opportunities to do just that

This. 3rd gear at 7400 is 120 Mph. That could be a car confiscation and jail time in this State.

The car feels like it has a larger engine with the truck mani.

 

[Grimreaper]

How much timing are you feeding it on e85 and how soon are you feeding it that timing?

If you run similar timing as 93 it will very likely make less power. Give it more or wait to compare on ur 93 tune so things are close to being the same minus the manifold would be my vote.

The consumption on e is real! Can easily disappear a qter tank in couple of 3rd or 4th gear pulls. But getting the consistency that 93 lacks is starting to become worth it to me

Thanks for sharing your efforts and results!

Any logs showing the airflow with these 3? Unchanged maf curve would be best

For most in here this goes with out saying but I try and consider the whole car when making mods. Rear gears/ trans choice can make or break something like a mani change. If they are too tall or short the power band just won't work for it. Pick what works for the setup at hand. Two coyotes may put down same power on the dyno but the rest of the car dictates what that looks like getting it to the ground when driving.

 

[K4fxd]

I am bringing the timing in faster, the logs say I can still add some in low RPM high load areas.

I will post up more logs as I get more info.

I know it shows 4th gear but it hasn't shifted yet, just commanded.

 

[Grimreaper]

Is that 26.5 degrees right in that rpm range?

Zero the mbt lambda table richer than 1.0 and make sure the knock sensors have enough headroom for few more degrees. May need to reduce the knock rate for the rate normal to something closer to the rate fast. It won't feed in the timing north of 6k or so if you aren't close to the mbt limit to start. I'm running 1/3 the stock amount on e in that table and even forced mbt or what ever timing I want and let the knock sensors pull vs add/pull.


That's some healthy flow! Curious what ur pump pressures might be at since I've recently found the stock settings lacking with lu47 and e.

We need to trade some cam settings. Curious how holding that air in is working up top. May need to back mine down a bit

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