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| mx68u
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| Posted:Apr 20 2003, 04:05 AM |
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For those that are trying to get quite a bit more power from the f2t have you found any restrictions with in the intake pipe to the turbo. I remember hearing or reading something about the plastic piping from the AFM on the F2t to the turbo was very restrictive, has any1 noticed any improvement in high rpm performance by using some sort of larger diameter aftermarket piping? I think on a stock car the stock setup would be fine but for those of us pushing 200-250hp surely we will notice some sort of improvement?
Redneckmx6, have you by any chance adapted the stock f2t setup to your fe3 conversion or are you using an aftermarket setup?
just really looking for some bonus hp by just making things run more efficiently with my engine  |
| redneckmx6
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| Posted:Apr 20 2003, 04:27 PM |
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Well, I run a map sensor now. But I did use ALL of the stock pipes for the turbo set up until now.
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Yes it's a turbocharged FE3, (soon on the bottle) and NO you can't drive it
WARNING: Does not play well with others (it seems others have a problem with losing)
My Beast
| QUOTE | posted by 90tx5
cheers
you r like the car god on this forum |
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| mx68u
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| Posted:Apr 20 2003, 05:19 PM |
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map sensor would be the way to go 
unfortunately i have already invested in a chip which im led to believe will support the power figure im after so it looks like i will have to just keep the standard AFM  |
| Rodhog
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| Posted:Apr 20 2003, 06:13 PM |
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there are a few restrictions in some cars but you haveto find the demand to require a fix
On a MX-6 these are the main restrictions
Exhuast and dump pipe a 2.5inch to 3inch from factory dumb will get rid of 90% of that
yes if you want get a new dumb and seperate wastegate pipe. But if you paln on a new turbo wait till then.
Now intake
first the Airbox is not a restriction in fact it's one of the best airbox desgins out there for air flow. The AFM is somthing you can't do much if you are using a factory ECU but it is still quite large and in fact similar size AFM have been used on alot or early RACE cars of the 80's FJ20 BLUEBIRD ???? BOSCH AFM vane type 400Hp
It's the entry to the airbox that hold's it up okay the port hole is small but adiquite
get rid of the factory Tube/duct and Silencer and that frees up alot.
Now the only thing left is between the turbo and AFM this is where you may find is reduces lag being smaller but stops top end power.
My Opinion is stock turbo leave it after 14psi you ain't going to get much top end from it anyway.
After market bigger turbo I say 2.5Inch no bigger I have seen 3inch.
But I like to go by entry size if the entry size is like 67mm or 80mm use the same size pipe to connect to the AFM. Don't go bigger unless you think you really need to.
ON a MX-6 but I would alow for 1mm extra width if you paln to use the factory length of about approx 700mm's. If you useing say a direct setup by moving AFM to where the battery is and a straight 400mm set-up like same size is best.
Limits the lag and you have almost no restriction and remember Manrel bend's a must. Reason they use plastic as plastic is easy and cheap
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| mx68u
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| Posted:Apr 20 2003, 06:53 PM |
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| yeah im not entirely sure how large the diameter of the piping is from the AFM to in turbo, i've heard it posing a restriction so i assume its actually smaller a one-point/multipoints or thoughout than the flap opening on the AFM. In any event though a relocation of the battery and a straight section of pipe from AFM to turbo will most certainly be an improvement! |
| Rodhog
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| Posted:Apr 21 2003, 12:49 AM |
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I personally think taking the outlet size of the AFM then to the Turbo inlet and a small tapper closer to the turbo. This will also provide a venturi effect so it lets the air rush in quicker killing lag. But most setups I have seen are the oposite but this is due to the turbo inlet being bigger like on a 200Sx with Trust T51R turbo and factory small air-flow meter
most people would think the AFM a restriction when it was not, in fact it lost 1KW throught out the range down low when the car was moved to a map sensor picked up nothing up top. But did allow a better mixture whe nit was run on more then 1.2 bar boost
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| Posted:Apr 21 2003, 02:22 AM |
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thats good to hear rod, the vf22 intake is much larger than the stocker so i will have a similiar setup soon that *should* yeild some sort of gain  The battery relocation will be a hassle but well worth it imho |
| 90tx5
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| Posted:Apr 27 2003, 11:07 AM |
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well i got rid of the factory intake to the box and bought some 65mm poly drain pipe (can only by it in rolls of 20mtrs) and while my pannel beater was respraying my new pannels i used about 40cm and used the factory air box's rubber grommet then ran the polly drain straight to my front bar were there is a whole and some mesh.
havn't driven the car yet (get it back today) but i will tell u if i feel a bit more power!
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the f2t is a powerfull engine, but only to those who can handle the power! |
| 90tx5
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| Posted:Apr 28 2003, 01:24 AM |
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it actually works quite well !
it was quite a cool night though so my turbo would of been kept happy
but for a cheap mod it does wonders for my intake temps and my power
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the f2t is a powerfull engine, but only to those who can handle the power! |
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| Posted:Apr 28 2003, 11:48 AM |
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congrats 90tx5, i remember when i did mine, you can feel a bit of a difference, it certainly did feel faster for me too...
rod: im sorta looking at something like you suggested, i do also feel that matching the diamter of the pipe to the inlet of the turbo would be the most efficient design. Thinking of relocating the battery and just getting a straight section of pipe (or one with a slight mandrel bend at one end) and mounting the afm on that. Up top the car does feel good but its obvious that the vf22 wants to pull heaps harder from 5 to 6k. |
| Rodhog
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| Posted:Apr 30 2003, 09:52 PM |
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Well it should
The F2 it long stroke and it it really like boost to be cold and strong up top.
It should pull lilke a " INSERT WORD OF PULLING HERE"
relocating the battery is never a bad idea.
You see alot of missive pipes going ot these small turbo's and wonder Why doesn't the factory do that "LAG"
If you notice form factroy the size of most of the pipes is the same.
You may say cost cutting "NO" not in the 80's cost cutting was not as big a deal as making the car go.
The worst is the ET pulsar having ot snake around from one side form AFM ot intake
it's really bad but once you remove it even on a stocker it makes the turbo spool quicker but due to the size being the same throughout, it makes the stock car smoth. Of course finding an ET stock now days is very hard.
One thing I do suggest MX68U
replcae the earth(BODY) to gearbox cable. Mine went it it was a real pain to replce with out having a reason to pull apart the intake system.
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Winning is Winning
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| Posted:May 2 2003, 12:30 AM |
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will keep that in mind rod.. cheers... unfortunately due to the crappy manifold design i have yet another exhaust leak, will be taking the car in tomorrow, hopefully its all sorted and i might be able to begin this project!
As you describe the intake system on a stock ET i remember looking at the mx6 one and it doesnt seem that much better.. sure enough it doesnt snake around all over the shop but there are a couple of significant bend and differing tube sizes that will definately impede flow up high.. cant wait to play around with it and take the new setup out for a g-tech run
next thing on the intake system... what about the intake manifold.. doesnt look like a tough job to pull the thing off, what sort of flow restrictions does it cause or is it the valves that are the real restriction from the "truck" engine  |
