Intake Manifold design.

[Top Notch]

Found a couple designs trying to find the best for my setup.

http://i88.photobucket.com/albums/k163/wakiser1/Rx-7%20Pictures/rx-7%20build/DSCF1583.jpg

http://i88.photobucket.com/albums/k163/wakiser1/Rx-7%20Pictures/rx-7%20build/DSCF1584.jpg

[PrerunningRanger]

Well.. lets see you decide what one you like best and when you come next weekend we can start making one after i weld you Ic pipes and Wastegate Flange.. lol

[Top Notch]

Word. Just don't want anything to complicated.

[PrerunningRanger]

Naw lol but let me see about getting the shop this weekend and we can go from there ill prolly either see about it today or tomorrow.. ill let you know as soon as i do and i gotta find out what material we gonna use lol dont got alot of alum tubing.. just noticed today lol but we got some if anything i can make one thats like the first one easy.. lol thats just a flat plate with a another one put on top with a roll in it with Bug holes.. lol

[nagelandy55]

Would that be for the earlier heads? I like it though, looks alot like the one jess had made.

[PrerunningRanger]

Im making one that looks like jess's but im prolly going to use a Different Tb all together... im going to try and see if i can use either a twin 62mm Tb off a 96-98 cobra... or use a twin 65mm ima see what i got TB, laying around lol I know i got an F150 twin 58mm TB but dunno it that will work..

[nagelandy55]

Why twin? Or is that just the name for them?

[PrerunningRanger]

Well they are twin blades.. lol its like two 32.5mm blades in an oval shaped Tb, i wonder if it would help with Tq. cuz it helps in Cobras with TQ.... so i dunno somthing about the Blades being smaller but still haveing the same overall size that creates Velocity.. lol or atleast thats what one of my friends told me..

[nagelandy55]

I'm sure adam will chime in on this one, he seems to know alot about this velocity stuff in intakes.
Would make sense to me though, do you have any pics? Are they any more compact?

[AJ_Fritz]

the only way i would use twins is if they were progressive.
or if you were using paired twin turbos with twin intercoolers and seperated intakes. would look sweet but i imagine would be pretty gay to drive.

i think if your running a formula one car you could discuss design all day. for a driver, turbos make torque, let the turbo do its job and you keep up with flow to the head. simple fact its a 2.3L it makes 100hp and 100torque out of boost and thats pretty much at full trot. no real powerhouse, what you need to do is find ways to make it spool faster and keep up with flow. the intake should have a sufficiant head volume. ussually 50-60% of the total engine displacement. IMO intake runner entry and shape will always yeld more power throughout the curve. air does not like to turn. the straighter simpler design will always prevail.

[Top Notch]

Adam would you make the one one that Wes made. Kinda looks like yours? Or just the 90* bend?

[PrerunningRanger]

Well my design wouldnt be like two Throttle Bodies, it would be just one in the shape of an oval but it has twin blades, they open at the same time just two holes on each side of the TB, as far as the intake manifold i was thinking of making just like Jess's but i would like to change it alittle... like use the Top Flange that mounts to the lower intake manifold flange just like jess's but instead of the Cylinder shapped i want pretty much a little larger then a Half Circle with the bottom flat and close to the Lower manifold.. lol dunno if you get what im saying, ill try to add a link to what TB im talking about...

http://www.troyerperformance.com/cgi-bin/itemimgs/3875.jpg

i want a TB like that if it would help any with Flow, or overall be pretty much useless... and Suggestions would be great, still learning about making manifolds.. lol

Oh and it would be a single intake with a "twin blade" Tb on it not 2 seperate.. lol
dunno if thats what you ment by the twins being progressive..

[muddpawz]

whats the signifigance in the round/half round upper as oposed to just the 90* dumping straight into the lower intake? seems like the 90* would be cooler, and more forceful as it entered the head no?looks like roush went with the long round, just curious what the difference would be? Im all for jess's looks clean and works awsome!

[PrerunningRanger]

Well.. mud.. mine is going to look like jess's justins is for an svo intake mine is for a 1996 ranger... so intake manifolds little different

[AJ_Fritz]

i forget what wess's looks like.

ah crap your talking about the mail box one. i dont know.... thats a tough one. i hate that head and the lower that goes with it. seriously id saw it off at the straight parts staighten it out the best you could with a die grinder, and sheetmetal a tapered end on it. kind of like turbopinto's intake. pics are in the BS Lounge. i just wouldnt make it 2 peices.

[Top Notch]

Might go with something like this:

http://hensleymotorsports.net/images/albums/NewAlbum_1065d/53.jpg

http://hensleymotorsports.net/images/albums/NewAlbum_1065d/54.jpg

[Top Notch]

http://i287.photobucket.com/albums/ll158/adriansvo/130amp3galternator60mmtb40bobscutro.jpg

http://i287.photobucket.com/albums/ll158/adriansvo/underhoodshot.jpg

http://i296.photobucket.com/albums/mm185/hamstang2000/svoforsale056.jpg

http://i296.photobucket.com/albums/mm185/hamstang2000/svoforsale057.jpg

[PrerunningRanger]

those look pretty!

[AJ_Fritz]

i like the last one and hensleys. you dont want to know what 4 and 5 inch mandrel bends cost in a aluminum though.

[PrerunningRanger]

Its pretty expensive... lol

[muddpawz]

aj, you said you like the last one, is it just a hand made boxed upper that bolts to im guessing a gutted lower? or is it actually welded to the lower to make a single piece? looks like a good one to me too

[muddpawz]

can anyone tell me whats the biggest tb that will bolt directly to a stock intake upper on a 94 ranger, and what it originated on? if its in another thread, just point me to it!!

[PrerunningRanger]

i need to know also... lol i think its any 94-95 mustang gt 5.0 throttle body... cuz a stock one will bolt up.. but im pretty sure any aftermarket ones for the mustang prolly bolt up to.. but im not an expert so dont listen to what i say... i just assume.. lol

[Jesshwarren]

i need to know also... lol i think its any 94-95 mustang gt 5.0 throttle body... cuz a stock one will bolt up.. but im pretty sure any aftermarket ones for the mustang prolly bolt up to.. but im not an expert so dont listen to what i say... i just assume.. lol

94-95 5.0L and the 95+ explorer 5.0L The idle controlle valve must be on the TB.

[Top Notch]

http://www.teamzmotorsports.net/2007%20DESIGN/tim_lyner/popups/14.jpg

[nagelandy55]

http://www.teamzmotorsports.net/2007%20DESIGN/tim_lyner/popups/14.jpg


Wow, looks good!

[Jesshwarren]

http://www.teamzmotorsports.net/2007%20DESIGN/tim_lyner/popups/14.jpg

That is impressive right there.

[AJ_Fritz]

arca head.... but yeah that looks like poetry in motion!

[muddpawz]

the 94-95 5.0 tb is the biggest one that will bolt directly to a stock 2.3, but what size is it? guess you could get one any size, as long as its for that year motor right? then a tune for the computer has to be installed right?

[flyin]

A throttle body change should have no effect on tune unless there is such a restriction that you now peg the maf. The IAC duty cycle should also be monitored. You are looking for about 35% at warm idle with accessories off. If it is too high or low Idle controll problems could occur. To adjust turn the throttle stop screw and let the computer readjust the IAC percentage.

[AJ_Fritz]

doesnt the computer calculate load with TPS too? so if you switch to a larger TB the load tables wont be the same because the opening will be different for the same TPS voltages. now where it is effected most will be the lighter load tables where your cruising.

now how huch does the throttle position effect the load tables is the question you should be asking.

[muddpawz]

that makes sence, but ive never heard anyone ever mention it before, and it seems to be a common upgrade? So the solution to this next delima is....? AJ, are you running a stock tb? I was just trying for some easy bolt on hp!! THANKS lol!

[AJ_Fritz]

ive run larger throttle bodys. i find the smaller ones function better for the street.

[muddpawz]

that answers that!! im only gona run on the street...for now ha! does there come a point where the stock tb becomes restrictive, and is that complicated to tune it, or just not worth it unless your pushin 350+hp?

[AJ_Fritz]

seriously what you should do is see what works. not all combos are the same. i would start with the stocker. its not that hard to go larger. go to a dyno or the track, see if there is an improvement with a larger one. if there is see if you can live with the symptoms.

i couldn't. i find going to bigger TB's on my combos results in stuff that drives me nuts on the street. trailer hitching really sucks, and i dont like having to train my foot for something that the car or truck shouldnt do. tailer hitching is the result of an exessive amount of intercooler volume and poor throttle response with a vane air meter. it only happens when comming off of light boost. usually when your backing out of the throttle after a hill. your not lifting enough to blow off boost but it is enough to flutter the VAM door. and the next thing you know the rear end feels like its going to jerk out from under the truck.

large throttle bodys will also cause the cruise control to loupe. enough that it will make a cast iron stomach sick. it will feel like its throbbing down the road lol.

[muddpawz]

thats the insider trading info you dont get without experience!! im gona stick with the stocker until i get closer to the fine tune! too many other smell things to drive me nuts that need to be dealt with!!!

[AJ_Fritz]

so did i miss the pics or didnt you show the intake manifold you built justin?

[Top Notch]

so did i miss the pics or didnt you show the intake manifold you built justin?

Going with a 120* from Bob. The other intake manifold didn't work out.

[Jesshwarren]

doesnt the computer calculate load with TPS too? so if you switch to a larger TB the load tables wont be the same because the opening will be different for the same TPS voltages. now where it is effected most will be the lighter load tables where your cruising.

now how huch does the throttle position effect the load tables is the question you should be asking.

The load runs off of the MAF voltage. It can be set to T/B position but in stock programing runs off of the MAF voltage.

[muddpawz]

So Jess, your saying that swapping in a larger tb dosent effect the computer because its corrected by the MAF? That would mean it wouldnt be anything but a bolt in swap, no recalibrating involved correct?

[fordnut71]

thats right. obd2 will recalibrate a tps based on air flow in the mass air. so if it sees 2 volts at low airflow it will use that as the new base voltage of low flow.
so you can bolt on a new t/b an not have to calibrate a tps.