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Old 04-02-2006, 06:41 PM   #126
PHATsuby
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awesome, thanks for the info Tim.

So, just dropping the alternator down I am assuming a new belt is still needed...hmm I'll have to find out about that.

when you say I will have to mess with the fuel lines and harness you are just talking about the couple bolts that hold the hardlines and the plastic plugs that hold the harness right?

also, just to be clear it can be done with no hood clearance issues, one person told me it couldnt be done without cutting a hole in the hood pretty much(maybe skeleton I am not sure).

thanks again.

Ben
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Old 04-02-2006, 07:46 PM   #127
dentsport
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Here is a picture of the dentsport time attack car we built this summer, also featuring a reverse mounted manifold we fabricated in house.



You can check out the specs of the motor at our site www.dentsport.com

-Nate
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Old 04-02-2006, 11:10 PM   #128
tino
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Quote:
Originally Posted by PHATsuby
So are people saying that you ABSOLUTELY cannot reverse the STi manifold without removing A/C and flipping the alternator over, or can it be done going over the alternator with it lowered?

I have seen it done but I think that was on wrx setups and not STi's.

thanks for the Help!

Ben

Ben ive done it (or actually my workshop did) have a look at my build. on an 04 STI.

topic:
"Progressive pictures of GT35R custom rotated mount"
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Old 04-02-2006, 11:12 PM   #129
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Quote:
Originally Posted by PHATsuby
awesome, thanks for the info Tim.

So, just dropping the alternator down I am assuming a new belt is still needed...hmm I'll have to find out about that.

when you say I will have to mess with the fuel lines and harness you are just talking about the couple bolts that hold the hardlines and the plastic plugs that hold the harness right?

also, just to be clear it can be done with no hood clearance issues, one person told me it couldnt be done without cutting a hole in the hood pretty much(maybe skeleton I am not sure).

thanks again.

Ben
Yes u will also need a new belt. With the fuel lines u cant just flip them around. My workshop went for braided lines to remove the headache of the hardlines.

It fits under the hood perfectly, with more room to move. using 2.5" pipe asfaik
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Old 04-03-2006, 12:03 AM   #130
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Quote:
Originally Posted by PHATsuby
awesome, thanks for the info Tim.

So, just dropping the alternator down I am assuming a new belt is still needed...hmm I'll have to find out about that.

when you say I will have to mess with the fuel lines and harness you are just talking about the couple bolts that hold the hardlines and the plastic plugs that hold the harness right?

also, just to be clear it can be done with no hood clearance issues, one person told me it couldnt be done without cutting a hole in the hood pretty much(maybe skeleton I am not sure).

thanks again.

Ben
No problem!

You are correct, just unbolt the fuel lines and harness from the manifold and then switch it around. Unfortunately nothing really "bolts" up to the manifold after that. We opted for the Perrin fuel rails to get those out of the way instead of messing with the stock rails. Then on the wiring harness, we removed all the plastic pieces that hold the harness to the manifold. That way it became more plyable and easier to move around. Then all of the vacuum lines become a major issue and have to be rerouted because nothing is where it used to be.

As for hood clearance, I have a couple inches at least, but I have the 45* coupler coming right off the throttle body to get the pipe down....no alternator to go over. But I've seen pictures of different setups with people getting over the alternator without problems. Just don't know about hood clearance.
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Old 04-03-2006, 12:29 AM   #131
PHATsuby
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awesome, thanks for the great info guys!

hmm, I will be using 3" piping into the TB since this will be a blow through setup, hopefully that extra 1/8" each way wont be my end, haha may need to make some aerodynamic "indents" jk, it should be doable, will just need to mock up carefully and triple check clearances.

thanks again, more questions may be on the way, actually I guess one right now, is where are people sourcing their belts, does a place like napa have that large of a selection to just choose from?

Ben
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Old 04-03-2006, 12:50 AM   #132
SloRice
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I got my belts from Advanced Auto. We're regulars there and the workers let us hunt around for stuff we need behind the desk.
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Old 04-03-2006, 05:07 PM   #133
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I would LOVE to see before and after dynos. Even my lowly VF39 can pressurize my FMIC rather quickly. I can't image 2.5' being measureable (and fwiw, my setup spools the same, it's the throttle response from vacume to full boost that changed).

Nice writeup, this should be in a FAQ! Great job.
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Old 04-03-2006, 06:44 PM   #134
Nixlimited
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Quote:
Originally Posted by PHATsuby
So are people saying that you ABSOLUTELY cannot reverse the STi manifold without removing A/C and flipping the alternator over, or can it be done going over the alternator with it lowered?

I have seen it done but I think that was on wrx setups and not STi's.

thanks for the Help!

Ben
Here's mine with all accessories in place. We used a Legacy manifold to get around said issues.

Check out my Journal for more info.
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Old 04-03-2006, 06:54 PM   #135
Capt Crunch
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Quote:
Originally Posted by Nixlimited
Here's mine with all accessories in place. We used a Legacy manifold to get around said issues.

Check out my Journal for more info.
WOW! That's a great idea! And the best part is you only need to fabricate 1 pipe! It's perfect for blowthrough too it looks like
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Old 04-03-2006, 06:57 PM   #136
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oh no, ,I just realized, this will onyl work on USDM stis, because you guys use DBW throttle.

dammit!
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Old 04-03-2006, 07:20 PM   #137
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Quote:
Originally Posted by Capt Crunch
WOW! That's a great idea! And the best part is you only need to fabricate 1 pipe! It's perfect for blowthrough too it looks like
Yup, and it is blowthrough. Look at the bottom of the straight pipe and you will see the MAF sensor.
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Old 04-03-2006, 07:36 PM   #138
PHATsuby
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Yea, Jarrad and I did that on his GT(I think we were the first) I suggested this would be the nicest and easiest route but the friend I am doing it for doesnt like the idea of "plastic" for a manifold or the black color and fears more restriction. Personally none of these would be issues for me nor do I think its more of a restriction at all, but it is not my car so I must do what I am asked Congrats on that setup, it looks nice. I have those saved, haha.

Ben
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Old 04-03-2006, 07:47 PM   #139
Nixlimited
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Quote:
Originally Posted by PHATsuby
Yea, Jarrad and I did that on his GT(I think we were the first) I suggested this would be the nicest and easiest route but the friend I am doing it for doesnt like the idea of "plastic" for a manifold or the black color and fears more restriction. Personally none of these would be issues for me nor do I think its more of a restriction at all, but it is not my car so I must do what I am asked Congrats on that setup, it looks nice. I have those saved, haha.

Ben
Forgive my ignorance, but if you work for/at PDX, then yes, the credit is yours. This idea was based off seeing the PDX LGT with reversed manifold at SEMA, though I think I may be the first STi with such a setup. I think it solves lots of problems and the black manifold actually looks good in my engine bay with everything else changed.
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Old 04-03-2006, 08:49 PM   #140
PHATsuby
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haha, no need for forgiveness, its no big deal. Your's is the first STi i know of to do this, and its smart too, I am surprised others have not done it as well good job for being the pioneer!

I do work at PDX but am currently not there, hence why i do not have a STi at my disposal, haha.

thanks for the help.

Ben
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Old 04-03-2006, 09:19 PM   #141
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Quote:
Originally Posted by Nixlimited
Here's mine with all accessories in place. We used a Legacy manifold to get around said issues.
It looks as though the piping is not significantly shorter than if you had not reversed the manifold.

Do you know what length of piping was actually eliminated via this reversal?
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Old 04-03-2006, 11:12 PM   #142
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Quote:
Originally Posted by STI_FFY
It looks as though the piping is not significantly shorter than if you had not reversed the manifold.

Do you know what length of piping was actually eliminated via this reversal?
Probably about 2' or so. However, the length of piping is not as big a concern as the number of bends. By doing it this way, we cut out another 180 degrees of bends. Overall, though the power gained specifically due to this setup may be minimal, I think the engine bay looks way nicer and frankly I wanted to do something original.
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Old 04-03-2006, 11:20 PM   #143
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nice work. looks great!
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Old 04-03-2006, 11:42 PM   #144
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New guy here so i don;t need a detailed answer: Whats the benifit of the reverse manifold, reversing it alone cannot make more power can it, is it simply for FMICs to shorted the amnount of tubing nessecary and thus redcue lag and acheive better spool and throttle response?
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Old 04-04-2006, 12:04 AM   #145
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Quote:
Originally Posted by Nixlimited
Probably about 2' or so. However, the length of piping is not as big a concern as the number of bends. By doing it this way, we cut out another 180 degrees of bends. Overall, though the power gained specifically due to this setup may be minimal, I think the engine bay looks way nicer and frankly I wanted to do something original.
I have no problem at all with "doing it for the art".
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Old 04-04-2006, 01:50 AM   #146
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The LGT manifold looks like a great solution, but won't work for turbos in the stock location for obvious reasons. Can you attach a drive by cable throttle body to one of those manifolds?
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Old 04-04-2006, 08:32 AM   #147
PHATsuby
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not without an adapter, the bolt spacing is different than the cable TB's.

Ben
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Old 04-04-2006, 11:25 AM   #148
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It's not a reversed manifold. This is the official reversed manifold thread haha.
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Old 04-04-2006, 11:46 AM   #149
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Great thread, lots of awesome info!
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Old 04-04-2006, 12:12 PM   #150
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No a cable driven throttle body will not work with the LGT manifold. The throttle body mounts underneath the runners on one side.

-Matt
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