J-Spec-Boost

Hey guys so iv started buy parts inorder to do my j spec turbo swap into my N/A now i understand stock boost is 5.5Psi.

Now i would like to try and make 9 or 10Psi what mods, in your guys experiance is needed to run 9 or 10Psi on stock turbo? 3inch downpipe? 3inch exhaust? boost controller? intake?

if its even possible?

please realize i have never run boost before so its all new to me.So i am trying to understand how all this boost crap works. From what i understand to increase boost u want more free flowing air!

someone hook me up with the understandings of FC boost lol

boostinfc3s

a fmic.. that stock tmic isn't going to get you anywhere, at least not in my opinion. lol

J-Spec-Boost

yea i plan on getting a front mount but im still unshore on what mods i will need to run 9 psi on stock turbo

RotaryRocket88

iTrader: (7)

Your intercooler has nothing to do with how much boost you can run. The turbo hotside & exhaust system restrictions are the limitation. Intercoolers reduce air temps, so all that boost you're making doesn't go to waste by merely increases the temps by so much that pressure's effect on hp is negated.

On a COMPLETELY stock car (other than a simple boost controller), you can get the pressure to spike to 15PSI+. That doesn't mean it's safe for the engine, or for the turbo. The only upgrades you need are 720cc secondaries, a bigger fuel pump, a fuel controller or programmed ecu (rtek 1.7/2.1) & a boost controller. 12 PSI is the ideal max to run and it is easily attainable with an open exhaust and the safety mods. It should not be pushed any further than that. Past 12 PSI, you will see no performance gains, and you will shorten the life of the turbo.

KhanArtisT

iTrader: (2)

pretty much what rotaryrocket said. If you have a lot of downtime in a given day (socializing BS) I recommend that you make better use of the time and buy a book on turbocharging (look for "street turbocharging-mark warner"). Either that or you can search google and get info off of random sites.

J-Spec-Boost

hey thanks for this info in seems like u know what your talking about. so i have another question for u! i am planging on going with 3" exhaust ok but will a
2.5"DP make much of a diffenrence from a 3" down pipe?? and is just a boost controler all u need to get the boost up to say....10Psi??

Turbonut

iTrader: (1)

You don't need the exhaust as you can get 10 pounds on the stock exhaust system with a boost controller, as long as you have the fuel/ignition system modifications to address the higher boost.

PvillKnight7

iTrader: (16)

dont worry about ignition. the stock ignition is pretty strong. unless you're tuning is way off or you're running a lot of water injection, the spark will spark just fine.

assuming you're competent enough to install the motor and get it running...if you have some money to spend after installing the 13BT i'd get:
TII ecu w/ safc
720cc secondary injectors
TII fuel pump / supra fuel pump / walbro255
manual boost controller
S5 stock cast iron manifold, smooth the runners and port behind the wastegate flapper
2.5" downpipe straight to the Y-pipe. no cats
FCD

think thats it...

goodluck!

Turbonut

iTrader: (1)

Just an FYI-I wasn't speaking about the spark itself, rather a modified timing curve adjusted as the boost increases.