TRD S/C + Header

[Jbarker1983]

I wanted some opinions from people with the s/c and header is it worth adding the header positives and negatives? when i was n/a lost low end and gained rasp wasnt worth it had a 4-1 header. my current mods are s/c 9.5 pulley,cai,2.5 catback,2.5 s-pipe full pulley set

[KiKaZ-tC]

Originally Posted by Jbarker1983

I wanted some opinions from people with the s/c and header is it worth adding the header positives and negatives?

when i was n/a lost low end and gained rasp wasnt worth it had a 4-1 header.

my current mods are s/c 9.5 pulley,cai,2.5 catback,2.5 s-pipe full pulley set

Just like n/a, you'll feel like you lose a little bit on the low end, but you will feel a little difference on top end. Is it worth it? I would say no, unless you were to get your car tuned.
Then again, it might be worth switching out to an aftermarket header, if you want to save the cat on your stock header for when its time for smog.

[Jbarker1983]

Dezod catted header claims good amount of power gains saying its like adding boost lol

[browniemxn]

I thought it was common knowledge that a supercharger always gains better HP with a 4-2-1 header design. 4-1 header always gives a higher end gain with a slight lose on the low end. If I were you, I'd see about getting your supercharger modded to handle a decent pulley without melting down.

Get a decent pulley on there then see what things you can add for extra tibits of power. Meth injection is on that list as well. I tell you this because getting decent power with the TRD supercharge without a pulley upgrade is going to be some coin for minimal gains

[Jbarker1983]

I got the nst 12 lb pulley in my house just need injectors and some form of tuning meth to I guess if I could run it untuned with bigger injectors I'd put it on now. Meth and a tune gonna be awhile

[Jbarker1983]

I had a 08 si with I/h/e and flash pro untuned and I feel like my tc now would smash it but then again idk not sure what I'm putting down for pwr numbers with my tc.

[browniemxn]

Oh and I don't consider 9.5 pulley a decent amount of boost for a supercharger. Superchargers are linear as you know, giving you a max boost at the high end. 9.5 psi is hardly even close to what your block can handle.

I was able to run14.5 ish on a stock block with a high meth shot to compensate for smaller injectors. I took my own block apart (not blown) to upgrade my components and the pistons and bearings looked new.

Its hard to remember that mods like an intake header or exhaust will do little to help a smaller engine unless it's really boosted. Again this is just an opinion not a thou shalt. I miss my JRSC on my Honda good piece to have.

[browniemxn]

Do you have a wideband?

[Jbarker1983]

I mean the tc now moves good but mid range could be stronger really want to slap that 12lb pulley on

[Jbarker1983]

I got no tuning at all and in my area there are no tuners that I know of was gonna grab 550 injectors and a UNI chip and see what's up

[browniemxn]

Also what kind of fuel management do you have?

[Jbarker1983]

Running TRD tune

[browniemxn]

OK grab some 550's slap those on and then add your 12.5psi pulley. But before you run it make sure you get a meth kit. Set the progressive method kit to dump at 9.5 psi I mean an aggressive amount. Chances are is that the stock computer is only good for 10 psi tops. Use your wideband to tune the meth to compensate for those last two or three psi. Downfall of this method is if you run out of meth juice you go boom. However, if you get the right kit it will pull boost if a lean or no juice situation occurs.

[browniemxn]

Best would be a wideband and an EGT. Then you just see where the most power is made and remember the egt and then make sure you never exceed that temp. I have ran my Honda almost down to 13afr on a turbo with a healthy shot of meth and was able to even add crazy amounts of timing! Meth is seriously my best tinker for tuning. Oh I should say meth/water injection not just meth.

I would steer clear of a UNI chip for a self tune.

[TeeCizzle]

My friend is running the S/C w/ the DEZOD Green Header...He loves it.

[Jbarker1983]

What is his whole set-up that header pricey I can live without a cat only need it for inspection once a yr lol

[Jbarker1983]

What do you recommend I hear the toyota ecu is a _____ to crack and it kills me that I have this 12 lb pulley laying around

[Roller_Toaster]

Just throwing this out there...my ebay header (which is wrapped) has worked flawlessly for over 10k miles. There is a huge thread on it. Cost me around $100, + $30 to wrap it.

http://www.scionlife.com/forums/showthread.php?t=200725

And here is my thread on wrapping it (I used DEI titanium header wrap):

http://www.scionlife.com/forums/show...wrapped+header

[browniemxn]

I'd keep the stock ecu if I could do something like hondata. No way to hack that ecu there is a guy in Canada that has done it but he has some highly specialized equipment. Price is also well above a standalone. Stock computer is a Genius when it comes to running our cars it is self learning and dang near sky net for AI capabilities. It will terminate your tune if you don't fool it right.

AEM fic is very good I'm sure Paul at Dezod could hook you up with a nice starter map. Although I have seen people run a 12.5 pulley with the supercharger TRD tune before with success the two I know both ran meth. The first guy is the one who convinced me to buy a TC after he owned the Audi rental I was in.

Whatever the circumstances you may be in you will for sure need a wideband. There is no way around at least that. You will need an EGT I feel that is very important. Third I wouldn't skimp on the method. TRD supercharger is not intercooled like a turbo so I would make sure that gets thrown in there. Hot air in your engine is no bueno. Ultimately get a fuel management of some kind that you can at least learn simple tooning . But if your short on tuners I would not mess with that yet. A bad tune will even bypass your ecu long enough to go boom.

I would data log with my 9.5 pulley with a wideband and EGT. Then throw the meth on and datalog some more then add the 12.5 psi pulley on there with a healthy amount of meth then slowly adjust it down for your desired EGT and AFR results. If you can't get it to pull the EGT and AFR's you want take the pulley off and then get your fuel management.

I would prefer using the stock computer until it can't adjust anymore. It's very smart it will pull timing too. Now I'm not saying it won't blow I'm saying it will do everything to prevent a knocking but will ultimately succumb to your lead foot. People say running boost on a stock computer is stupid I will agree if the person has no idea how to tune. But I know many on this forum even that running boost that way. I know many others off the forum as well.

In the end the tune is based off obtainable numbers and the ability of the person getting them. This is also a no mans land people run all sorts of crazy stuff. How well do you trust yourself?

[browniemxn]

Sorry about the posts my phone has autocorrect! Makes for a good read though. Good luck with whatever you choose. Remember most of what you read is mostly opinion. Professionals also disagree with each other all the time on which methods are best. Just remember have fun doing it.