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H-Bomb
Dodge Dakota
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4/23/2007
04:36:59

Subject: 4.7 H.O. intake on a regualar 4.7
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Does the 4.7 HO intake manafold flow more air than the normal 4.7. I got an 02 4.7 V8 Manuel trans. 4x4 dakota. can I put the new 4.7 HO motors intake manafold onto the old 4.7 motors, Will it make any improvement at all? (torque, topend, throttle response, gas mileage?) and if so, say i wanted to put on a throttle body spacer do u order it for a 4.7 motor or a 4.7 HO motor, or is there no difference.



Kowalski
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4/23/2007
15:45:08

RE: 4.7 H.O. intake on a regualar 4.7
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What you are calling an HO manifold is actually the regular manifold - but many seem to make that same mistake. Back when I got my truck ('00), there was a regular manifold that was tuned for low end power; and a true HO manifold that was used on the HO motor only. That manifold was tuned more for high rpm power. Soon after, they came out with a compromise design that is used for both motors. Since it is the same manifold as on the regular 4.7, I don't think it makes any sense to refer to it as an HO manifold - but I guess it makes some people feel like they have a better manifold. After all, we don't go around claiming we have an HO starter, or an HO alternator when the parts are the same for both motors, do we ? I'm not sure if '02 is the common design - I think it might be. Even if it isn't, the biggest difference you are likely to see would be a slight shift in what rpm you see peak power. There are better mods for your money - such as swapping in HO or hotter cams.

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Manny
Dodge Dakota
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4/23/2007
19:14:46

RE: 4.7 H.O. intake on a regualar 4.7
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http://www.wjjeeps.com/manifold.htm
Has comparison info on 4.7L intakes.




Android287
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4/23/2007
20:53:33

RE: 4.7 H.O. intake on a regualar 4.7
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There is a post on dodgetalk.com about the Ho manifold. http://www.dodgetalk.com/forums/showthread.php?t=148790&highlight=mani

What was found is that the best is the 2002 HO manifold. It will make 3-5 more hp over any other manifold.

Nothing flows like a straight pipe

01Motorsport
Dodge Dakota
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4/23/2007
21:59:05

RE: 4.7 H.O. intake on a regualar 4.7
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The intake manifold differences are very minor, at best. From the dyno results I have seen, the peak torque and horsepower numbers move up about 200 rpm on the charts with the HO manifold. I chose to keep my stock '01 manifold with HO cams, and sure enough, the peak torque is around 3400 rpm instead of 3600 for the HO manifold. Torque makes a truck more fun in daily driving, IMHO.



GraphiteDak
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4/23/2007
23:42:07

RE: 4.7 H.O. intake on a regualar 4.7
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No one mentioned to not WASTE HIS MONEY on the Throttle Body Spacer :p



Also, there seems to be some differences in the connections from the years.

The 2000 intake that I have on my 2003 Dakota had some small differences. Where the IAT mounted, vacuum hose position, etc. But it did bolt up the same, same throttle body mounts, etc...



H-Bomb
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4/24/2007
01:04:06

RE: 4.7 H.O. intake on a regualar 4.7
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Don't waste my money on a throttle body spacer? so those don't do anything for the 4.7 hu? not even alittle better throttle response?



4.7onN20
Dodge Dakota
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4/24/2007
01:55:32

RE: 4.7 H.O. intake on a regualar 4.7
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Nope not a thing. They worked on some carbed cars to get better fuel atomizatin but are worthless on any multipoint fuel injection car.



Kowalski
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4/24/2007
06:12:51

RE: 4.7 H.O. intake on a regualar 4.7
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Some have modded the TPS for better throttle response. Throttle response for mine was instantaneous straight from the factory; so lack of a spacer will not be the cause of yours. Worthless like the others have said.

Lead, follow, or get out of the way

GraphiteDak
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4/24/2007
10:36:16

RE: 4.7 H.O. intake on a regualar 4.7
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One thing that will surely give you a "seat in the pants" improvement is swapping gears. If you have the 3.55's that is. Most Dak's come with the 3.55 gears. Swapping to 4.10's will give more get up and go from a dead stop. Highway RPM's will be higher.

I went extreme with 4.56 gears. But that was because I was towing above and beyond the tow rating! I LOVE the 4.56 gears around town. just getting the hear the exhaust roar with them is worth it. I am running a little high at highway speeds though. Like 80MPH highway speeds. At 55 to 65 it sounds perfect.





TexasTodd
Dodge Dakota
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4/28/2007
23:02:27

RE: 4.7 H.O. intake on a regualar 4.7
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Graphite,

I RARELY disagree with you. But maybe you didn't see that he has the manual tranny?

With my 4.7, and 3.92's, that makes the 1st gear SHORT enough. 4.10's, or 4.56's make it just about worthless to use 1st gear, then he has a 4 speed again.

And dyno tested, (not by me, never bought one) the TB spacer on the 4.7 does nadda.





Kowalski
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4/28/2007
23:26:08

RE: 4.7 H.O. intake on a regualar 4.7
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Not all manual tranny have 3.92 though - separate option. I believe we all agree spacer does nada for a 4.7.

Lead, follow, or get out of the way

H-Bomb
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4/29/2007
22:30:17

RE: 4.7 H.O. intake on a regualar 4.7
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just for the record. i do have the 3.92 limited slip gears, and yes 1st is quite short. so i always start in second, but if ur gunna race 2nd is too tall still even if u slip it alot when u start. so i have to start in 1st then make the quick shift to second, all while trying to keep grip cuz its hard even with both tires spinin, but now i got on 285-60-R18's so i get alot more grip.

what do u guys think about a programer to gain some horse power, or is there anyother smaller things i can do to get alittle more "PEP" from it, i already have an huge K'N filter intake and customized Gibson cat back exhaust. I was also thinkin bout lossin the third cat cuz theres no O2 sensers after the manafolds on mine.



Kowalski
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4/30/2007
06:24:27

RE: 4.7 H.O. intake on a regualar 4.7
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You'll see gains from a decent flash or chip. Avoid the Jet chip.

Lead, follow, or get out of the way

01Motorsport
Dodge Dakota
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4/30/2007
10:47:51

RE: 4.7 H.O. intake on a regualar 4.7
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H-Bomb, I think we should have been encouraging HO cams more in this conversation. That's where the real power is. The other stuff is minor until the cams are done.



H-Bomb
Dodge Dakota
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5/01/2007
19:36:38

RE: 4.7 H.O. intake on a regualar 4.7
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so whats an HO cam, the came out of the 4.7 HO motor? do u just go to the dealer and order one? do u have to change anything else. how hard a job is that?



GraphiteDak
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5/02/2007
00:29:50

RE: 4.7 H.O. intake on a regualar 4.7
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Todd, I didn't even notice he had a manual tranny! LOL!

You are dead right about a manual tranny and really low rear gears not being useful.

My bro in law wants to install 4.10 gears in his Mustang. It's a 1979 Fox Body with the 302 and 4 speed OD POS manual. He will be installing a T-5 some day.

I told him I had 3.08 gears behind my T-5 in my similar Stang and that 1st gear was PLENTY low. I would do 7k RPM's to get to 35MPH or so. If that. He swears that he sees the 4.10's behind the T-5 in the Mustang Magazine but all I can think is those guys must be screaming 8k when they shift those super modified 5.0's!

On manual tranny's, the 4th gear is usually your 1:1, where on a auto it's the 3rd gear that's the 1:1. The 1st gear is usually pretty low on a manual :p





01Motorsport
Dodge Dakota
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5/02/2007
08:54:37

RE: 4.7 H.O. intake on a regualar 4.7
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H-Bomb, there is a post "HO Cams" currently on the performance board with info and part numbers. The only parts needed are the two cams.

GraphiteDak, 10-4 on the low manual first! My '01 4.7 NV3500 3:92LSD came with 29" tires, and it wasn't so bad. I switched to 17x9's with 28" tires, and first is good for all of 20 feet in normal driving. If I'm on a downhill slope leaving a stop light, I start in second. If you want to see something radical, check out the THIRD gear burnout of a supercharged RC NV3500 on KRC's website! My dream is to get a Kiesler/Tremec 6-speed with sports car/ close ratios. ($$$$lol)



01Motorsport
Dodge Dakota
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5/02/2007
09:28:02

RE: 4.7 H.O. intake on a regualar 4.7
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OOPS..KRC removed the burnout videos. I left them a note about it.



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