ported and polished UIM andl LIM

[LoboMan7409]

Hey guys with P and P UIM and LIM, what kind of gains can I expect when I get these things installed.

[Sprucegagt]

Moved

[LoboMan7409]

Moved

Thank you, I didnt know where to put it

[pyro]

alot more power over the entire band...i havent had the car dynoed so i cant tell you specifically, but i noticed alot of extra power, esp when accelerating from high speeds.
note: i also put my DHP PCM on at the same time so that might have something to do with it.

[ihatemygrandamg]

I have a ported upper, and I have a ported lower on the way. Both of them are worth getting.

[timberwoof]

Where are you guys getting the parts? And do you have to get a PCM to keep the car from running lean? Would it benefit to get a bigger throttle body with these upgrades as well? and so on. I'm trying to keep from doing to much exhaust work, I'm thinking about getting the Cut Out to do away with it. Stock - Cut Out Exhaust, You think that will be noticable?

[pyro]

Where are you guys getting the parts? And do you have to get a PCM to keep the car from running lean? Would it benefit to get a bigger throttle body with these upgrades as well? and so on. I'm trying to keep from doing to much exhaust work, I'm thinking about getting the Cut Out to do away with it. Stock - Cut Out Exhaust, You think that will be noticable?
i got all of mine used from members here (under $200 for both) and no you dont need DHP but its reccomended. i would do exhaust first before the P&P...its easier. i would reccomend a P&P TB if you get them too. doesnt do much but every little bit helps.

[ihatemygrandamg]

You could get a cut out but its still wouldnt be as good as a full exhuast unless you drive with it open all the time.

Many companies make ported 3400 parts, just do a search.

No a pcm is not needed, but it is one of the better mods to do on a ga.

And yes a bigger tb would help much more. It is matched to a ported uim so it flows much more evenly.

[timberwoof]

cool cool, the whole thing about the exhaust is, that I don't want to get an exhaust that sounds like a little **** burner. We have enough of those around here and I haven't heard a GA yet around here that I like. Any thought?

[pyro]

cool cool, the whole thing about the exhaust is, that I don't want to get an exhaust that sounds like a little **** burner. We have enough of those around here and I haven't heard a GA yet around here that I like. Any thought?
if you have the 4cyl, go for pace setter or flowmaster 60 series, if you have the v6 go flowmaster 80 series.

[timberwoof]

I never thought oh an 80 series, I guess it makes sense. I use to have a 40 series on my 3.0 Ranger, before I sold it. Man I miss the sound of a SC, on a V6.

Anyway the 40 series was loud, and sound close to a mustang when idle.

[AaronGTR]

Porting the intake manifolds will get you a little HP, but you won't see much of an increase with stock heads and cam. They are a supporting mod meant to gain more flow and increase efficiency in air flow with other high flow items. You might get 5hp from them alone. With ported heads and a cam you might get 10-15hp. It also depends on how good your cam and heads are and what throttlebody you use. Ported TB's are garbage and don't do anything since the size of the throttle plate opening is still the same. Don't waste your money on it. You need an actual larger TB that is port matched to the UIM.


Your biggest gains will be from intake, exhaust, headers, and pcm tuning. You should do those first. Then you move to heads and cam, then ported intakes and bigger TB. And after that you will probably need bigger injectors and more pcm tuning.

[timberwoof]

Mental note taken. Thanks. Now if I could only find a cheaper exhaust system. But I guess monkeys will fly before, nicole richie starts eating.

[Ajaxus]

ouch..lol

well the choices are out there, some guys here prefer custom work, some like the premade exhaust setups..all comes down to personal preference in the end..

[Sprucegagt]

With ported heads and a cam you might get 10-15hp.

While I agree with the rest of what you said, I don't agree with this. Gains would be closer to 30 HP not 15 HP.

[AaronGTR]

Well, like I said, it would probably depend on how good and how extreme your cam and heads are. I guess 30hp would be reasonable with the right parts. Not many people have gone and dyno'd a head and cam car with stock manifolds then with ported stuff have they? I know most people tend to get the ported mani's first since they are cheaper and easier to install, even though they should be doing it the other way around (or all at once for that matter).

[jackal2000]

i dynoed my car bone stock @ 144hp. with ported manifolds, match ported TB, 2.25" exhaust and DHP PCM i hit 160hp on the same exact dyno.

note* i was also burning oil at the time of the second dyno so that most likely didnt help the numbers.

torque saw a similar increase going from 160 to 175.

[Vegeta]

You should at the very least use a 3500 plenum. Upgrading to the 3500 heads and intake manifolds would be the best setup to start with though.

[timberwoof]

You should at the very least use a 3500 plenum. Upgrading to the 3500 heads and intake manifolds would be the best setup to start with though.

Where would you get this 3500 stuff and does anybody else have an opinion on this? Aaron you seem to have a big opinion on things and are usually more right than most, what do you think?

EDIT: Awe I see, you are one of those "there's no replacement for dispacement" kinda guys. <---- Don't take it personal some guys just need to compensate.

[Vegeta]

What are you talking about? The top end doesn't change your displacement.

[harvester45]

EDIT: Awe I see, you are one of those "there's no replacement for dispacement" kinda guys. <---- Don't take it personal some guys just need to compensate.


What are you talking about? The top end doesn't change your displacement.

I think Vegeta just means that the flow with the 3500 top end will be a far better starting point.

[LoboMan7409]

so is miltzy good to get these from

[Vegeta]

Milzy doesn't believe in the 3500 top end swap unfortunately. He is pushing his ported 3400 parts but the 3500 stuff is superior. Ill post flow numbers once I am done porting a 3400 manifold set so I have comparison numbers. I hope to have them up tonight.

[AaronGTR]

Where would you get this 3500 stuff and does anybody else have an opinion on this? Aaron you seem to have a big opinion on things and are usually more right than most, what do you think?

EDIT: Awe I see, you are one of those "there's no replacement for dispacement" kinda guys. <---- Don't take it personal some guys just need to compensate.


3500 stuff is good. A swap to the upper is simple enough and will yield some gains if it's port matched to the lower. It does require a few modifications to work but I don't remember them all, being that I haven't done it yet myself. Using the 3500 lower will require you to use the 3500 heads as well because the intake ports are slightly different. 3500 heads have better flow stock compared to 3400 heads stock. They also have more combustion chamber volume though so you'll lose a little compression. Just depends on what you want to do. They would be great to do with boost. NA, I'm not sure on the gains vs ported 3400 heads if you aren't also putting in high compression pistons. More research is needed on this.

[Sprucegagt]

Aaron you seem to have a big opinion on things and are usually more right than most, what do you think?

That's definitely a newb statement.

As for the drop in compression. You will go from 9.6:1 to 9.1:1. It's not that big of a drop and would be hardly noticable on this engine. But you have to remember that with the added airflow, HP would improve. How much remains to be seen.

[Vegeta]

Its actually 9:1 even, or 9.16:1 if you take .020 off (measured). Using stainless valves will net you over 9.2:1 with the shaved .020. Thats about as high as you are going to get without getting new pistons. I wouldn't use thinner head gaskets given the stock quench height being damn good.

I have posted a new thread with flow numbers for 3400 vs 3500 parts.