12-23-2008, 11:14 PM | #1 |
Tri-State Post Whore
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Need advice on intake manifolds
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12-23-2008, 11:39 PM | #2 |
Tri-State Aficionado
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You could look into the JDM Spec C manifold that replaces the TGV's as well. Other than the Magnus I don't know of another aftermarket IM that will let you keep the TMIC.
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12-24-2008, 12:11 AM | #4 |
TST Ruined My Life!
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That's what I'm thinking. I don't see to many people do this to their Subaru's so what makes your car different? Whats your reasoning for getting one?
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12-24-2008, 12:15 AM | #5 |
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stick with the stock one. Unless you are trying to tickle 600whp you will never need one. Or unless you just want the bling
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12-24-2008, 03:10 AM | #6 |
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I am lookin to max out not too much over 400awhp. I want to know why and how it would hurt my reliability and drivability. I have done the exhaust fully, and i figured it'd be good to do the intake fully aswell. The intake Manifold seems to be an effective mod at my power level, one of the magnus test cars had similar power to mine (+/-300awhp) and saw an increase of 38awhp. not bad. i want to know the issues here other than price. (i know its alot) My original plan here was to do a perrin tmic, perrin crank pully, fuel pump, injectors, and a magnus manifold. This coming summer. Then, the following summer, id do a 20g with supporting mods and probly be done with the engine mods. I am deff open to advice though, and would greatly appreciate it. But just know that i have already bought the perrin tmic and the crank pully. I thought hard about a front mount, but didnt think itd be worth the extra money for my goals and the fact that this is a street car. With the 20g, im not gonna go too crazy, im just gonna run like 21psi or so, cuz im gonna be on 93 octane still. But this thread is about the intake manifold, however advice on other stuff is welcome.
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12-24-2008, 03:31 AM | #7 | |
The [TST] Don
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PLEASE post car specific questions in car specific forums.
The Magnus manifold fits like garbage and from what I've seen doesn't even show consistent increases in power. Unless you've got an extraordinary amount of money or knowledge that the rest of us dont, it would be a huge waste of money to do an aftermarket manifold. The one thing you could do is a TGV delete... thats not a bad way to spend some dough, but the install is somewhat involved just so you know.
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12-24-2008, 03:33 AM | #8 | |
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I'v built a few scoobs. So I know my fair share but I'm defiantly no guru. What I do know.....there's 500-550whp subaru's out there going 10's on stock intake manifolds. Given this fact....you defiantly don't need one. |
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12-24-2008, 07:48 AM | #9 | |
Tri-State Aficionado
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I have a friend with a Magnus IM and he said his midrange power was noticably better. I think that the only problem with drivability would be a little lag and probably a little low end torque. Seems like your mind is made up to do it. I say go for it. Make sure you get the one with the long runners that will get rid of the TGV's at the same time.
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12-24-2008, 08:56 AM | #10 |
Tri-State Aficionado
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you should be able to get well over 400 without ever thinking about your intake mani. if you dont even have a fmic i would be worried about keeping your iat down more than high end air flow. theres no need to waste money on a cool intake mani unless your just going for a few peak hp and not concerned with having a fast car, if this is the case just sell your subie and buy a supra, there all about the number.
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12-24-2008, 11:34 AM | #11 | ||
TST Ruined My Life!
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you don't need an aftermarket intake manifold it's a complete waste of money. Do TGV deletes if anything.
Listen to anything AREA1320 says he's a subaru genious.
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12-24-2008, 12:39 PM | #13 | ||
*yawn*
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Listen to Area1320, at this point he could tell me painting my turbo pink would add 40hp and I wouldn't question it. For all the other things to spend cash on the im isn't needed. If you need help spending that money just give Ryan a call at 1320 and I am sure he will come up with something far more worthwhile.
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12-24-2008, 02:36 PM | #14 | |||
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WOW. thanks guys!
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@ 21psi on a 20g you will be at around 350-360whp depending on the dyno... PLENTY of power to get in trouble with and enjoy
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12-24-2008, 02:48 PM | #15 |
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Ya, last night i did a little more research on the magnus im, and there were alot of negative reviews. Things like fitment and cracking. Also, I heard that as a company, they refuse to stand behind their products and replace faulty manifolds, and that they are quite rude to people who complain. I will not buy from a company like that. That plus the fact that all of u and many other subie ppl ive talked to have advised against it, Ive decided not to do it. Ive thought about this summer, and Im thinking this. My perrin tmic and crank pully, warlbro 255lph fuel pump, injectors (Undecided), Blouch 20g turbo, perrin SS BOV, and perrin intake hoses (the whole intake system would be aftermarket up to the manifold), and of course a tune. What do you all think of this? and do you have to do to install injectors and the crank pully, will they have to pull the motor out? Im tryin to get a price idea for the work involved.
Last edited by ndubz; 12-24-2008 at 03:09 PM. |
12-24-2008, 02:58 PM | #16 |
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if you go to a 20g you will need injectors.. there is no way around it. The motor stays in the car for everything ;)
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12-24-2008, 03:07 PM | #17 | |
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12-25-2008, 03:23 AM | #19 |
Tri-State Post Whore
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hey dude. listen to Ryan for your mod path, he'll guide you in the right direction. For a 20g, you can get away with some 740cc injectors just fine.
Here's the usual STi 20g buildup from the forums: APS 70mm CAI (ditch the perrin short ram. short rams are awful). your choice of turbo inlet TD06 20g 8cm 740cc injectors (04-06 use side feeds. 07+ use top feed. you can't mix these up. you need side feed). prodrive 3 port ebcs TMIC or FMIC upgrade turboback exhaust CLUTCH. now, let's maximize the car on pump. add TGV deletes header EWG up-pipe there are a lot of little bull**** mods that people do to these cars because vendors are great at vending like phenolic spacers, ported this or that, but power levels are almost always around the same general area despite it. some people claim you should run 1 step colder plugs...others make plenty of power without that step. some people go ape **** over what brand their oil filter is. some change their oil every 2k. just stick to whats proven to work and the path. others have spent all the hard earned money to make it easy for guys like you. it's not hard, but its not unique. like jay z says, stick to the script. :P
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12-26-2008, 02:23 AM | #20 |
Tri-State Aficionado
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go big the first time and be done with it. i did precision 1000cc injectors on my dsm (with the 20G :-) )and never had a single problem with them. i got a buddy witha 20G and he's already maxed out his 700's. imho you need to do fuel more than anything. once that is done crank the boost and get it dyno tuned.
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