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-   -   turbo/exhaust upgrade (http://legacygt.com/forums/showthread.php?t=198346)

thisheregirafFe 12-19-2012 01:05 PM

turbo/exhaust upgrade
 
hey all, first off sorry if this is in the wrong forum so mods please move if i've donkeyed up.

so i've collected a catless up upipe, a vf52 turbo, and a will soon have a new dp. aside from a tune, is there anything thing else i must have to support these mods? i'm not looking to squeeze every bit of hp/torque i possibly can, i just want a reliable daily with a bit more oomph.

also, i'm doing the rear sway before any of the power mods go in so yeah. thank you very kindly for any input!

Cone_Killer 12-19-2012 01:28 PM

Depending on your tune, you may look into an aftermarket intercooler option. I recommend this for the "reliable daily" part.

thisheregirafFe 12-19-2012 01:33 PM

right! i was thinking of going with the 'bullet proof' mod but am certainly open to an upgrade if it can be done relatively cost effectively. thanks for your input!

SpecBlitzed 12-19-2012 01:45 PM

Supposedly the factory ic can hold 19 psi. I am tuned there now car still running strong. But that VF52. I would upgrade

Nrw 12-19-2012 01:48 PM

At the bare minimum BP mod the stock intercooler.

An aftermarket intercooler would be nice, so wouldn't a EBCS (I like grimmspeeds), BPV (I like forge for this), and a upgraded fuel pump (dw65c).

BarManBean 12-19-2012 01:55 PM

Quote:

Originally Posted by Nrw (Post 4211769)
At the bare minimum BP mod the stock intercooler.

An aftermarket intercooler would be nice, so wouldn't a EBCS (I like grimmspeeds), BPV (I like forge for this), and a upgraded fuel pump (dw65c).

This. And here's my $.02 on making the choice--MAKE the choice, don't let something break and get backed into a corner. Either BP your stock intercooler now for $90 or pick up a reasonably priced aftermarket option from the forum (usually $400-500). If you blow you endtanks and have to buy something new it's gonna run you $650 or more plus the PITA of not having a working vehicle until you are able to get the part in.

EDIT: I'm obviously biased here, but I honestly try not to tell people what decision to make for their own needs and their own car. I will definitely agree with others though that if it is in your budget you should think seriously about upgrading the stock intercooler in one way or another.

thisheregirafFe 12-19-2012 02:15 PM

Quote:

Originally Posted by BarManBean (Post 4211790)
This. And here's my $.02 on making the choice--MAKE the choice, don't let something break and get backed into a corner. Either BP your stock intercooler now for $90 or pick up a reasonably priced aftermarket option from the forum (usually $400-500). If you blow you endtanks and have to buy something new it's gonna run you $650 or more plus the PITA of not having a working vehicle until you are able to get the part in.

EDIT: I'm obviously biased here, but I honestly try not to tell people what decision to make for their own needs and their own car. I will definitely agree with others though that if it is in your budget you should think seriously about upgrading the stock intercooler in one way or another.

yeah the intercooler was on my mind. i don't typically drive the car that hard, but always better safe. how much of a hassle is it to bp the intercooler? keep in mind i have a fairly small selection of tools and am by no means an expert wrench turner...

BarManBean 12-19-2012 02:25 PM

You need a rubber/wooden mallet (or a regular hammer with some scrap wood blocks) and the courage to bang the rails onto the TMIC--that's about it. You'll need a CV boot banding tool as well to tighten the zip ties and a hand file to prep (not always needed).

thisheregirafFe 12-19-2012 02:53 PM

that much i can do, thanks!

ragman 12-19-2012 04:36 PM

Quote:

Originally Posted by SpecBlitzed (Post 4211763)
Supposedly the factory ic can hold 19 psi. I am tuned there now car still running strong. But that VF52. I would upgrade

I'd say more like 17psi is the max on a stock IC.

thisheregirafFe 12-19-2012 06:03 PM

just remembered, am i going to need to upgrade the oil line to the turbo, or can i get by with removing the banjo bolt on stock?

ripemeat 12-21-2012 07:12 AM

clean banjo filter. thats it.

shralp 12-23-2012 11:01 AM

I know you aren't going to push that hard as you say, but a VF-52 car sure is fun if you decide to drop in an upgraded fuel pump and injectors along with a beefed OEM intercooler or aftermarket one. Just sayin! :)

PhaRaoN 01-07-2013 03:55 PM

Think is the right thread.

Are there any advantages of changing exhaust headers to aftermarket ones (invidia, etc..) on 08" LGT, when turbo is stock? (DP and catback are changed to aftermarket)

Berzerklo 01-07-2013 06:15 PM

Quote:

Originally Posted by PhaRaoN (Post 4234816)
Think is the right thread.

Are there any advantages of changing exhaust headers to aftermarket ones (invidia, etc..) on 08" LGT, when turbo is stock? (DP and catback are changed to aftermarket)

Not if you plan on keeping the turbo stock, or stockish (VF52, BNR 16G).

LouzGT 01-08-2013 01:08 AM

+1 on dw65c fp and aftermarket intercooler

fahr_side 01-08-2013 02:44 AM

Quote:

Originally Posted by Berzerklo (Post 4235125)
Not if you plan on keeping the turbo stock, or stockish (VF52, BNR 16G).

I used to be 100% behind that statement until I tried it on my own car (BNR16G). I put a Tomei EL header on to replace the stock manifolds and picked up about 15whp and 10wtq at peak, with best gain of around 20whp at about 5k0rpm and about 16wtq at around 5k4rpm. At no point is torque lower than with the stock manifolds, on the same boost curve. I didn't have to massage my tune any to get these numbers but other cars may need some more tweaking to get the same results.

You will always get the biggest gains by working on the elements in the system that offer the most restriction to flow. You usually gain little to nothing by improving flow in areas that are not yet critical. As stock, the first catalytic converter in the downpipe is the biggest restriction in the exhaust path. Once you get rid of that (at stage2) the tiny turbine in the VF-40 is new biggest restriction. Only when you open that up will you find the stock manifolds to be the new limiting factor. In a nutshell, the more restrictive your turbo hotside is, the less gain you will see from a header. Put a big-tube race header on a stock turbo car and you'll likely only see increases in lag.

Oh, and this.


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