MooreBoost

how much boost can i run without destroying my engine. mods are autothority stage 2 chip, lindsey 3", 3bar fpr

Techno Duck

I would not exceed 15psi with the APE stage 2 chips. Im pretty sure thats what they are mapped for. Just a word of warning, i had those chips on my car previously and they run mega lean in the high RPM range even in the <15psi range. In the sub 4500rpm range they will run down into the mid 10 AFR's and past 5k will dither into the 13 AFR's. Not a great tune really.

MooreBoost

cool thanks

so after suspension upgrades, i should get a maf, chip and wastegate to get more boost?

Paseb

you need a mbc and wastegate before upgrading boost... no?

MooreBoost

i have a mbc and a modified stock wastegate

reno808

Get a wideband for starters

Techno Duck

Like Carlos said, get a wideband so you can monitor the AFR. This is one of those things that goes hand in hand once you start upgrading.

15psi is a relativley safe boost pressure to run on pump gas. Anything higher and you start loosing that margin for error. Personally i would ditch the APE chips and get something with a better tune. Then a dual port wastegate and manual or electronic boost controller will help you hold maximum boost to redline, which really improves the drivability.

You dont need the MAF setup, the stock AFM and chip will do fine.

MooreBoost

thank you for the info and thanks for not being noobs and telling me to use search.

lee101315

I have the same mods as you and a K26/8, and I have my boost set to 18-19psi peak. By redline, its down to 15 again...but I find anything over that creates too much backpressure anyway. Ive been running like this for over a year with no trouble.

I want to ditch the autothority chips asap, as I am getting tired of having the back of my car covered in black soot for running so rich.

jasonlp

+1 no problems from 2003-2007

MooreBoost

i keep it between 12 and 17

Kool

Turn the boost up until you hear a bang and back off a bit.

Lorax

Well generally it's more of a "Crackle craclke crackle BANG"

One time I ran out of gas and absent mindedly put a some 87 in my car then boosted to 18PSI...

"Why does it sound like there are marbles in my down pipe??"

flpaindoc

I have the same chip And just ordered the manual boost control and some other goodies from LR. Would putting larger injectors (55#) make a diference? do I need to take that bajo screw off and put the stock back on? What is the function of this screw? Is there a better chip?

Tom M'Guinn

The basic HP adders are MAF with chips and fuel controller, boost controller, test pipe/exhaust, wastegate (tial 38 or 46 are popular), then bigger turbo and injectors. A boost gauage and wideband are essential before you start though, along with a strong ignition.