highest boost??

[blizz99]

What's the highest boost I can run SAFELY on pump gas with these mods:

Engine-
-HKS 264/272 cams
-Unorthodox underdrive pulley
-Buschur front mount intercooler
-Buschur full 3inch exhaust
-Buschur 3inch downpipe
-test pipe
-2g MAS
-Injen Intake
-255 walbaro fuel pump
-550cc injectors
-Manual boost controller
-Ported 2g exhaust manifold
-3" tubular 02 housing w/ external dump
-Evo 3 turbo
-Blitz BOV
-8.5mm magnecore wires
-ACT 2600 clutch w/ streetdisk
-short shifter
-Aeromotive FPR

Suspension/Handling/Brakes-
-94 big brake upgrade
-Stainless steel brake lines all around
-Powerslot rotors all around
-Metal master brake pads all around
-Kyb agx (4adj in front 8way adj in back)
-Eibach prokit springs 3/4 inch drop
-Front and back strut tower braces

Electronic-
-Super afc 1
-VDO black face exhaust temp gauge and boost gauge inside center vent
-Greddy turbo timer
-MMCD datalogger on Handspring Treo 300

What I'm really wondering is what everyone else is running because I need something to base my boost on when I'm tuning.

 

[CanadianTSi]

20psi would be a good number.

 

[fourreGsixty3]

I would say get a logger, and up the boost until you see knock, then turn it down a couple psi. I know its not a definate number, but its technicly the awnser to your question.

Dustin

 

[donmagicjuan]

Obviously this will depend a bit on factors such as weather, your particular setup, and the highest octane you can get at the pump, but most people start to reach the knock threshold at around 20 psi with a similar setup, as Tyler suggested. The best way to proceed is to start low when you tune, and gradually raise the boost with plenty of logging in between each interval. If you start to see knock that you can't tune out at 18-19 psi, then that's your limit. On the other hand, if you can get away with 21-22 psi on your setup, then consider it a bonus. Just remember that every setup will be a little different.

Good luck!

EDIT: I'm just getting destroyed today. . .

 

[fourreGsixty3]

Come on Don Im talking on the phone, watching a movie, and trying to type and I beat you to it, I must be on my game or your off off a little

Dustin

 

[donmagicjuan]

Maybe so, but my 3 lines > your 1

 

[fourreGsixty3]

I just try to get to the point quick.

Dustin

 

[donmagicjuan]

I wasn't knocking your information, just the amount of typing you had to do. I guess if I want to win I'll have to stop blabbing so much.

 

[fourreGsixty3]

I know you weren'y knockin me, and yeah you do go on forever, but that thural info is good.

Dustin

 

[BOOstGhost]

I'd just start off at 17 to be safe and work my way up from there.

 

[blizz99]

Would I be able to get away with more boost if i get water injection and/or intercooler sprayer?

 

[calcifer]

There is no right answer here, as all cars are different. You can either find out yourself with your logger and afc, and tune for no knock. Or you can have a tuner do it for you. To be safe, you should probably start around 17 and work your way up.

 

[fourreGsixty3]

Would I be able to get away with more boost if i get water injection and/or intercooler sprayer?

The awnser to this is yes. Multiple different ways it allows you to run more boost. You use to key ingredients in this, they are meth. and water. The meth. ups the octane count of pump gas, and as you may or may not know higher the octane the better of a knock supprecent it is. The water also keeps the TB, intake manifold free of any carbon building up, it also soaks up heat nicely providing less intake charge temp. which also lowers the chance of knock occuring. Also the meth/water injection keeps the cyl. walls clean...well as clean as a cyl. wall can get Also Im sure we will hear from DOn (donmagicjuan) on this subject he and myself have been awnsering these kind of questions in threads a load lately.

There is no right answer here, as all cars are different. You can either find out yourself with your logger and afc, and tune for no knock

That is generally the best awnser, so to me it sounds likr the right one, and Im not saying that just cause I was the first to suggest it .

 

[donmagicjuan]

Would I be able to get away with more boost if i get water injection and/or intercooler sprayer?

The primary motive for running an injection setup is this exactly. The improved knock suppression allows you to raise the boost past your turbo's pump gas efficiency threshold, as well as advance timing to achieve more power for a given airflow. The end result is a near race gas tune on 91 octane. You can see how this appeals to those who want more power but spend more time on the street than the track. Dustin was right in his post-- I guess I just had to throw my seemingly endless two cents in.

Regarding the IC sprayer, I wouldn't waste the time or money on it. Any Evo owner will probably tell you they're not worth the space they take up.

 

[fourreGsixty3]

See I told you guys Don whould show up. Just playin' Don, and nice catch on N-tercooler sprayer, yes, it would be the best bet to have it spray into the TB, not the intercooler.

Dustin

 

[blizz99]

How about timing, what should my timing be around?

 

[donmagicjuan]

Since you will be using an AFC to manage your fuel, you will not be able to tune for timing specifically. The 1G timing map peaks at a higher value than the 2G-- with 550s and the appropriate subtraction from the airflow signal, I wouldn't be surprised if you hit upwards of 23 degrees peak timing. You can lower your base timing a couple degrees if you run into knock issues, however, which may help a little. You should note that this will have a global effect on timing, meaning timing will be retarded during all driving conditions.

EDIT: Just noticed again that you're running a 2G MAS. With this setup, your airflow subtraction will be less than with a 1G MAS, so you might not have any trouble with timing-induced knock. You will still probably peak in the 20s, though.