FRPP intake manifold...is this normal?

[Blxcklist]

What? A large corporation would never lie....

 

[dalemllns]

FAIL!!!! I hope the next shot isnt my car like this.....

 

[kdesigns]

I have an '07. Only bug is the asshole owner's son who won't leave shit alone.

fixed.

 

[LuckyH]

I don't know if it's been mentioned. But any possibility that there's a direct correlation in the amount of movement each individuals manifold flexes and the varying results people are seeing on a dyno? I would think this movement could cause a fluctuation in flow.

 

[19COBRA93]

I don't know if it's been mentioned. But any possibility that there's a direct correlation in the amount of movement each individuals manifold flexes and the varying results people are seeing on a dyno? I would think this movement could cause a fluctuation in flow.

It only "moves" under vacuum. At wide open throttle the manifold is in its natural state. Any/all movement should have no effect on hp.

 

[dalemllns]

It only "moves" under vacuum. At wide open throttle the manifold is in its natural state. Any/all movement should have no effect on hp.

WILL YOU please stop...omg... Because of you I have checked several times...the freaking thing moves WHEN you first apply the throttle=NO VACUUM then returns back to the correct state while rpms are dropping. GO PUT YOURS ON then rev the freaking thing and SEE with your own eyes ITS NOT VACUUM.... people are getting mixed answers on here. And you of all people have no experience with it because yours is STILL IN ITS BOX..... go do that before you post technical experience with a product you have no knowledge on except in someone elses videos.... thank you

 

[19COBRA93]

WILL YOU please stop...omg... Because of you I have checked several times...the freaking thing moves WHEN you first apply the throttle=NO VACUUM then returns back to the correct state while rpms are dropping. GO PUT YOURS ON then rev the freaking thing and SEE with your own eyes ITS NOT VACUUM.... people are getting mixed answers on here. And you of all people have no experience with it because yours is STILL IN ITS BOX..... go do that before you post technical experience with a product you have no knowledge on except in someone elses videos.... thank you

Jesus Christ! Use your fucking brain and think for a second. It IS vacuum you DIPSHIT, What do you think causes it to move? Do you have some sort of instant supercharger on yours that no one else has? Watch the video the OP posted! It CLEARLY shows what the manifold does. I don't need to install one to know what it's doing or understand whats causing it.

Unless you're pressurizing your manifold as soon as you open the throttle, there's NO WAY it's expanding. That clear enough for you? It DOESN'T expand! The only way it can expand is a POSITIVE pressure from the inside.

As soon as the engine starts and the vacuum builds, the intake is going get "pulled" in or sucked in from the vacuum within. When you blip the throttle, or go wide open, the vacuum goes away and the intake expands back to its natural state until the throttle is closed again, at which time it again gets pulled back in (actually it gets pushed in from the outside by the atmospheric pressure, but that's probably WAY over your head). There is no physical way the manifold can expand beyond its natural state without a positive pressure from the inside. Make sense?

 

[JeremyH]

I don't know if it's been mentioned. But any possibility that there's a direct correlation in the amount of movement each individuals manifold flexes and the varying results people are seeing on a dyno? I would think this movement could cause a fluctuation in flow.

No, it only flexes when going back to vac, its solid under throttle and boost.

It only "moves" under vacuum. At wide open throttle the manifold is in its natural state. Any/all movement should have no effect on hp.

What he said.

WILL YOU please stop...omg... Because of you I have checked several times...the freaking thing moves WHEN you first apply the throttle=NO VACUUM then returns back to the correct state while rpms are dropping. GO PUT YOURS ON then rev the freaking thing and SEE with your own eyes ITS NOT VACUUM.... people are getting mixed answers on here. And you of all people have no experience with it because yours is STILL IN ITS BOX..... go do that before you post technical experience with a product you have no knowledge on except in someone elses videos.... thank you

19cobra93 is right. On start up vac pulls the top of the manifold down, I have a stb going over my manifold and you can see the top pull down from the stb slightly at start up, stays that way at idle. When we rev the car, the vac goes away the top comes back up and you see the sides bulge out slightly then as the vac comes back the sides move in, Back to this slightly deformed at idle/vac state.

Sat and did the black lung tests again last night with 3 other local forum members before we tackled the cam installs.

If you rev the car hard or go wot for a dyno pull there is little to no flex. The bigger movement is only doing a quick rev when the car goes from vac to zero back to vac real quick then you get the more noticeable bulge out/in effect. When you turn off the car off there is very little movement( going from vac to zero). I can only replicate the black lung on start up. (zero to vac) And quick revs (vac to zero back to vac) on a quick 1-2 sec rev.

On that note. The movement is not enough to bother me at all, and I will not be removing it. And plan to turn the boost up soon. Currently been running 12lbs on it for a month. About 500 miles.

 

[06GTMustang89]

If you rev the car hard or go wot for a dyno pull there is little to no flex. The bigger movement is only doing a quick rev when the car goes from vac to zero back to vac real quick then you get the more noticeable bulge out/in effect.

On that note. The movement is not enough to bother me at all, and I will not be removing it. And plan to turn the boost up soon. Currently been running 12lbs on it for a month. About 500 miles.

what about going from WOT for a 1/4 mile then nailing the brake at the finish line...i would classify that as going from 12lbs to pulling vac very quickly...i hope you are right and that the intake holds up otherwise it could be a disaster down the road...

 

[Cone Sweeper]

WILL YOU please stop...omg... Because of you I have checked several times...the freaking thing moves WHEN you first apply the throttle=NO VACUUM then returns back to the correct state while rpms are dropping. GO PUT YOURS ON then rev the freaking thing and SEE with your own eyes ITS NOT VACUUM.... people are getting mixed answers on here. And you of all people have no experience with it because yours is STILL IN ITS BOX..... go do that before you post technical experience with a product you have no knowledge on except in someone elses videos.... thank you

I laughed.. thank you sir. People like you and sudden out bursts and attacks on others when you clearly have very little knowledge about the process on how a motor operates in a technical aspect or you wouldn't be putting someone down when they clearly have valid points.

 

[JeremyH]

what about going from WOT for a 1/4 mile then nailing the brake at the finish line...i would classify that as going from 12lbs to pulling vac very quickly...i hope you are right and that the intake holds up otherwise it could be a disaster down the road...

I sat and watched the manifold closely on the dyno after installing to check for leaks from the fuel rail and listen during the intial dyno pulls. I didnt see any movemnet under boost, but then again i wasnt expecting any so i will def look at it again.

When i go back to the dyno here shortly i will watch the manifold again before during and after the dyno pull to see if there is more flex.

Will try to get some vids as well if i can find something better than cell phone lol. My dig camera can do better video but it has no sound.

I understnad the theory but im pretty sure there will be no more movement. Under boost the manifold is in its normal undeformed state. There is no extra flex introduced from the boost. The pressure increasing doesnt cause the manifold to flex more. The flex is from the vac being applied from zero so as the pressure bleeds off after the throttle closes from being in boost, the movemnt wont start till then.

However i will entertain this idea and keep an eye out for more bulge after going from pressure to vac quickly.

 

[TheSlow1]

Well I have had my manifold that flexes on for almost a week and roughly2500 of spirited driving, a trip to the track and a few times intentionally making the manifold flex. Nothing has changed yet still flexes the same way even thou there is no movement at the fuel rails. Additionally my car seems to like the hotter weather as well being I just drove from wi to tx an it seems to have more in the midrange now then it did up north. I'm gonna try to find a dyno down here and check it out

 

[TheKurgan]

what about going from WOT for a 1/4 mile then nailing the brake at the finish line...i would classify that as going from 12lbs to pulling vac very quickly...i hope you are right and that the intake holds up otherwise it could be a disaster down the road...

I did that this weekend except on a 1000ft track. I'm actually out of gear about 100ft before the traps so I'm dropping the hammer on the throttle blades at 6800 rpms in 3rd gear. I did that 4 times and it didn't collapse. IAT's were almost 160 degrees too.

 

[lostsoul]

Jesus Christ! Use your fucking brain and think for a second.

your PM box is full.. hahaha

 

[jodadejss06gt]

WILL YOU please stop...omg... Because of you I have checked several times...the freaking thing moves WHEN you first apply the throttle=NO VACUUM then returns back to the correct state while rpms are dropping. GO PUT YOURS ON then rev the freaking thing and SEE with your own eyes ITS NOT VACUUM.... people are getting mixed answers on here. And you of all people have no experience with it because yours is STILL IN ITS BOX..... go do that before you post technical experience with a product you have no knowledge on except in someone elses videos.... thank you

19cobra93 is correct along with Light! I can take a video of my boost gauge while idling and revving if that will help you with the idea of the vacuum. Actually here is a quick video of what happens when you step on the gas.

You can see when off the gas the vacuum increases which would cause it to be sucked in/pushed in(greater delta of pressure between the outside of the intake and inside it)



Jeremy, I took my videos with my cell phone too, but its the Droid X and gets 720p. If you let me know when you go back to Richmond, id go with! I'm interested to see what that thing does under boost! Mike didn't want me getting too close to the car during the dyno pull though.

 

[mds08]

Welp mine is doing the shit too. I hope FRPP knows what the hell they are saying.



BTW no chance on FRPP strut tower brace clearing. It needs a good inch drop.

BBR new adjustable motor mounts will help it some. Anybody have that set up . I'm using the motor mounts but at this point hell no on the new intake.

 

[19COBRA93]

BBR new adjustable motor mounts will help it some.

How do you like those? I've been looking at motor mount options as my motor shakes a lot too.

 

[Royski]

Sending mine back tomorrow. Hopefully in the future Ford will address this and make a better unit, maybe then I'll get it.

 

[mds08]

How do you like those? I've been looking at motor mount options as my motor shakes a lot too.

One of the best mods I have ever done. I could not be happier and I love the way the car responds with them. A great mod for the money.

 

[dalemllns]

19cobra93 is right. On start up vac pulls the top of the manifold down, I have a stb going over my manifold and you can see the top pull down from the stb slightly at start up, stays that way at idle. When we rev the car, the vac goes away the top comes back up and you see the sides bulge out slightly then as the vac comes back the sides move in, Back to this slightly deformed at idle/vac state.

Sat and did the black lung tests again last night with 3 other local forum members before we tackled the cam installs.

If you rev the car hard or go wot for a dyno pull there is little to no flex. The bigger movement is only doing a quick rev when the car goes from vac to zero back to vac real quick then you get the more noticeable bulge out/in effect. When you turn off the car off there is very little movement( going from vac to zero). I can only replicate the black lung on start up. (zero to vac) And quick revs (vac to zero back to vac) on a quick 1-2 sec rev.

On that note. The movement is not enough to bother me at all, and I will not be removing it. And plan to turn the boost up soon. Currently been running 12lbs on it for a month. About 500 miles.

I am leaving mine on aswell, but it bothers me, I have a STB (Bullitt) too and I worry it may rub

I laughed.. thank you sir. People like you and sudden out bursts and attacks on others when you clearly have very little knowledge about the process on how a motor operates in a technical aspect or you wouldn't be putting someone down when they clearly have valid points.

I built my car my self, its not the first either bud. I respect him enough not to just dog cuss him out although Im sick of reading the same "its vacuum". I understand how vacuum works and that when the throttle is pressed, more vacuum is measured, but it doesnt suck in, it pushes out, but after reading lightblades explanation I understand. I havnt looked at it that way only on the side. Now I went and had my wife rev mine and watched the top of the intake between STB and didnt see any movement there, only at the rails. The Biggest complaint I have is that my stock intake made no movement, this was advertised as better than OE, movement is not better than OE. Its gonna eventually cause some people some problems. Maybe I will skate by, maybe not. But its not what I was sold on..... and 19cobra93, Im sorry for the outburst....

19cobra93 is correct along with Light! I can take a video of my boost gauge while idling and revving if that will help you with the idea of the vacuum. Actually here is a quick video of what happens when you step on the gas.

Thanks, i just feel like I got ripped off. This is not what I was sold on. Had they said some deflection was possible no one would have bought the thing. I bet since this thread has started they have prolly not sold to many to guys on this forum. Everything else I have gotten from FRPP is great stuff, this intake just doesn't cut it for me. But thanks for the vid I get it now..