FRPP intake manifold...is this normal?

[klaw]

What other parts could possibly be damaged by a potentially cracked intake manifold? Which really is the worst that could happen. A crack. That's it. And none have surfaced, which proves it truly is as durable as they say. I'd put your pessimistic worries to rest.

I'm not jumping into the debate on the manifold itself but a manifold crack could lead to unmetered air entering the engine which can result in a lean condition and detonation. The stock internals on these cars won't handle lean conditions under load for very long.

 

[JeremyH]

I'm not jumping into the debate on the manifold itself but a manifold crack could lead to unmetered air entering the engine which can result in a lean condition and detonation. The stock internals on these cars won't handle lean conditions under load for very long.

Not under boost, it would be the opposite. lol

On a side note anytime i have seen a vac leak issue occur while actively driving it goes wrench mode and throws codes.

 

[19COBRA93]

I'm not jumping into the debate on the manifold itself but a manifold crack could lead to unmetered air entering the engine which can result in a lean condition and detonation. The stock internals on these cars won't handle lean conditions under load for very long.

You're thinking of a boosted motor that's already on the edge. If the manifold cracks on a boosted motor, you'll get the opposite reaction, it'll run rich because metered air is coming out of the manifold instead of in. The only scenerio you're describing would happen on an n/a motor. You can run an n/a motor a little lean without doing damage. So lets assume the manifold does crack on said n/a motor, within seconds you're going to know it. Try it for yourself, pull the big pcv/vacuum connector off from the front of the manifold. Leave it disconnected and take your car around the block. That vacuum leak makes the car run like pure donkey balls. No way you're going to be out racing it like that. Hopefully all that makes sense.

 

[klaw]

Not under boost, it would be the opposite. lol

On a side note anytime i have seen a vac leak issue occur while actively driving it goes wrench mode and throws codes.

Like everyone using one of these manifolds is FI ....

.... and a stock tune

 

[Dillon Dollar]

iv got the frpp manifold and im n/a for nor i left a line off my catch can witch = loss of vacuum the car wouldnt even idle right, i got out put it back on and i was fine some one would definetly knnow if there was a crack

 

[JeremyH]

According to FRPP, the castings are all identical, and there have been no changes, no updates, and no problems. There are manifolds that don't seem to "flex" like the others, but it's more likely they just haven't been looking for it or haven't noticed it. I've sold quite a few of the early and late batches and they all flex, even the one on my own car.

I agree, its actually very hard to make the manifold flex like you seen in the vid. I did exstensive testing on mine to make it do it. It only does it at idle at a very slight quick throttle blip where you go from full vac to zero to full vac again in less than a second.

On startup or shutdown it doesnt do it, under gradual/variable throttle conditions and wot it doesnt do it. So in other words under normal driving conditions theres is never any flex.

Its just an oddity that can occur when you sit and rev the motor quickly. The change from vac to atmospheric pressure back to vac causes the the top to raise/lower and the sides of the runner to flex in/out. Tin-canning i believe is what ford calls the term.

 

[JeremyH]

Like everyone using one of these manifolds is FI ....

.... and a stock tune

When i made my comment about a vac leak all of a sudden happening while actually driving the car i was talking about an n/a setup.

The car will tell you right away unless your an idiot and try to stay in the throttle and even then an na car will be forgiving and pull timing etc.

iv got the frpp manifold and im n/a for nor i left a line off my catch can witch = loss of vacuum the car wouldnt even idle right, i got out put it back on and i was fine some one would definetly knnow if there was a crack

He's just doomsdaying a scenario that realisticly would never happen just for the sake of making the arguement, no worries.

 

[19COBRA93]

I think at this point we're (once again):

 

[JeremyH]

I think at this point we're (once again):

Im sure we will be doing 5 years from now as well... lol

 

[klaw]

... unless your an idiot and try to stay in the throttle ....

certainly none of those around .....

and even then an na car will be forgiving and pull timing etc.

as I said - depending on the tune

 

[JeremyH]

certainly none of those around .....




as I said - depending on the tune

LOL you win.

 

[Loudmouth1o]

Ive been reading up on this forum for a while now, ever since the manifold has been released and I was just curious if you think it is worth the money to spend on just a bolt on car. Intake, pulley, gt500 tb, tune, I do not have long tube headers yet but will in the future. I have been debating on delete plates or the manifold to go with the 3.73 i will be putting in my car this month.

 

[Dillon Dollar]

Ive been reading up on this forum for a while now, ever since the manifold has been released and I was just curious if you think it is worth the money to spend on just a bolt on car. Intake, pulley, gt500 tb, tune, I do not have long tube headers yet but will in the future. I have been debating on delete plates or the manifold to go with the 3.73 i will be putting in my car this month.

I suggest you just save up for some nasty cams and head then add the manifold it is really a supporting mod to heads and cams, but Blow by racing did make an additional 20hp on a bolt on auto car that just had an intake and off road X

 

[lostsoul]

Agreed, unless you planing on cams, ported everything, stroker and so on.

My manifolds been doing good. Just wish the tune mached :-/...

 

[Loudmouth1o]

I suggest you just save up for some nasty cams and head then add the manifold it is really a supporting mod to heads and cams, but Blow by racing did make an additional 20hp on a bolt on auto car that just had an intake and off road X

Yeah blow by is the local shop for me and they told me the same thing also that on an stock car with just the manifold they gained 38hp which is very impressive to me, but who knows.

I plan on doing stage 1 BBR cams in the future, but i want to get my gears done and add a lil more power before i do the cams so i was figuring to do the manifold with the gears. Long tubes are too much money and cams are just as much so i was going to prep my engine before the cam money comes flowing in

 

[dalemllns]

I stayed off of here for a while cause I was getting angry about this manifold "tin cann" but I have to say, several months and a couple thousand miles, several runs later....no issues on my N/A'd car. I got spray now and when it warms up will being shooting the piss out of it since the warranty is now gone, I will keep you guys updated on my experiences but up till now no issues other than the flex...

 

[Blxcklist]

Someone else has been spraying it for a while now with no problems. Ill be spraying the piss out of mine next year as well

 

[TheKurgan]

I've sprayed a 125 shot through mine about a dozen times.

 

[FalconGTHO]

zero problems with the placement of the Pinto fuel tank . . . .

Actually, they DID know about the problem but determined that lawsuit payoffs were cheaper than a recall.

Fuktardicus.

this will happen

So insane. I wonder what that sounded like?

08 1/2 and newer would have been awesome as they had the head revision adn a few more options from the factory, but i couldn't afford one of those, i'm plenty happy with my 06.

i wonder if they'll make a revision to this manifold and actually make it sturdy.

What is this head revision you speak of?

Its like my baby coming out with a Fro.. a little shocking

 

[dalemllns]

I've sprayed a 125 shot through mine about a dozen times.

I bet with the NOVI plus the gas its a hell of a ride...lol I've got the Edelbrock Plate System PN 70410 with the 100 pills, my tuner doesnt recommend more than that on my fuel system so we will see how well it does, shooting for low 11's full weight.....