T28 GUYS .... How much boost on pump gas?

[hottboost]

Just as the title says, Im curious as to how much boost everyone is running on pump gas?

 

[diablos991]

You might be able to go to 22 since your IC will be a little better. Let us know how it goes.

Even with the stock 450cc injectors?

 

[hottboost]

Even with the stock 450cc injectors?

Your stock injectors will probally run out at 16-17Psi ( thats as far as I could push mine ) Start at like 15psi and turn it up slowly and watch your timing curve. Keep going up untill you see dips and then back it down a little. I would leave it at 15psi until you have access to a logger. Better safe than sorry!

 

[andymoraitis]

That's sage advice. Just remember that when referencing a logger to look for knock, 1 degree of timing pull is 10 counts (fairly significant but not life threatening). Ultimately, you want a smooth curve with no dips and a solid peak. Also keep an eye out in the midrange where timing seems to stick in one spot and then go down or up. The 2G ECU will hold timing at 7 counts and this would indicate that either more fuel needs to be added or boost needs to be reduced.

Hope that helps,

Andy

 

[pnishr]

Even with the stock 450cc injectors?

No, no, but in order to tune the T28 to where it's meant to run there's gonna have to be some fuel upgrades. I think Hottboost is pretty much on the money. 16-17 is probably gonna be plenty for the 450s. But once you get some larger injectors and something to tune with, that FMIC will make a pretty substantial difference on what boost could/should be run.

 

[hottboost]

That's sage advice. Just remember that when referencing a logger to look for knock, 1 degree of timing pull is 10 counts (fairly significant but not life threatening). Ultimately, you want a smooth curve with no dips and a solid peak. Also keep an eye out in the midrange where timing seems to stick in one spot and then go down or up. The 2G ECU will hold timing at 7 counts and this would indicate that either more fuel needs to be added or boost needs to be reduced.

Hope that helps,

Andy

This is exactly right. Your advice helped me alot when trying to tune mine

Carl

 

[Rice Over Wheat]

Rather than start another thread on this, I wanted to add my input and see if anyone has pushed their T28 variants any further.

I am currently running 21 psi and tuning out my minimal knock. Basically I'm looking for the point where I'll see diminishing returns or less performance. I'm still working on 21 psi to make sure it's safe, as full boost kicks in almost violently now and I don't want to break something.

I was previously running 19 psi, peak timing of 23, no knock that I could detect. You can see my logs here: http://www.dsmtuners.com/forums/showthread.php?t=245101

I found this table that shows the airflow ratings for most turbos if anyone is interested. I have a ported AGP Big T28 which is rated 36 lbs/min. So if some of you were seeing 30 lbs at 20 psi or so, you should have some room left. Has anyone maxed their T28 with supporting mods that can do so?

http://devnulled.com/topics/autos/dsms/feed/

Mitsubishi:
16g = 34lb/min
Big 16g = 36lb/min
EVO III Big 16g = 36-40lb/min (DSMLink has logged several 40+) NEW!!!
20g = 44lb/min

Forced Performance:
Big28 = 37lb/min
FP2544 = 44lb/min (56trim/ dual BB)
Sleeper 16g = 44lb/min
Green = 49lb/min (50 trim)
FP49 = 49lb/min (50 trim, T31 turbine)
Red = 60lb/min (60-1 trim, dyno 520whp)
FP3052 = 52lb/min (dyno 504whp)
FP3065 = 65lb/min (dyno 585whp)
FP58 = 65lb/min (GT40 56 trim comp. wheel, .49A/R PTE, T350 turbine)

There you go Art, now you have correct information.
Regards, Robert

AGP:
T28 = 36lb/min (TB03 compressor)
RS43 = 43lb/min (46 trim T04E)
SS44 = 44lb/min (It is a 44lb/min but not a 48trim. It is not a GT30 at all. It's special, topsecret, Kevin)
RS49 = 49lb/min (50 trim T04E)
RS60 = 60lb/min (60-1 trim) (claimed 534whp)
RS65 = 65lb/min (56 trim GT40)

DSM Performance/Extreme Turbo: UPDATED!!!
ETA12 = 36lb/min (S-trim, ETA comp housing)
ETA32 = 48lb/min (50 trim, ETA comp housing)
ETE32 = 48lb/min (50 trim, T04E comp housing)
ETE42 = 50lb/min (60 trim, TO4E)
ETE52 = 55lb/min (60-1 trim, TO4E)
ETE53 = 55lb/min (60-1 trim, T04E) NEW!!!
ETE73 = 72lb/min (T66 comp wheel, T04E) NEW!!!

Buschur Racing: UPDATED!!!
BR-BIG28 = (claimed 350hp) NEW!!!
BR20G = (TD05/6 hybrid, first in 10s)
BR475 = (No info as of yet) NEW!!!
BR57 = (Garrett T3/T4)
BR500 = (claimed 504whp)
BR580 = (claimed 575whp)
BR675 = (No info as of yet) NEW!!!

Slowboy Racing: UPDATED!!!
SBR-M50 = 48lb/min (50 trim)
SBR-M60 = 60lb/min (60-1 trim)
SBR-GT10 = 44lb/min (48 trim, dual BB)
SBR-GT11 = (No info as of yet) NEW!!!
SBR-GT12 = 55lb/min (56 trim, dual BB)
SBR-GT13 = 60lb/min (60 trim, dual BB)
SBR-GT14 = 65lb/min (56 trim, dual BB)
SBR-GT35R = (No info as of yet) NEW!!!
SBR-GT30R = (No info as of yet) NEW!!!
SBR-G50 = 48lb/min (50 trim, T04E) NEW!!!
SBR-G57 = 55lb/min (56 trim, T04E) NEW!!!
SBR-60-1 = 60lb/min (60-1 trim, T04E) NEW!!!

Frankenstein Turbos:
Frank 1 = 46 trim, 20*clipped TD05H turbine, TD05H 7cm2 housing
Frank 2 = 46 trim, unclipped TD06 turbine, TD05H 7cm2 housing
Frank 50 = 50 trim, unclipped TD06 turbine, TD05H 7cm2 housing
Frank 3 = 54 trim, unclipped TD06 turbine, TD05H 7cm2 housing
Frank 57 = 57 trim, unclipped TD06 turbine, TD05H 7cm2 housing
Frank 4 = 60 trim, 10*clipped TD06 turbine, TD05H 7cm2 housing
Frank 5 = 60 trim, unclipped TD06H turbine, TD05H 7cm2 housing
Frank 6 = 60 trim, unclipped TD06H turbine, TD05H 8cm2 housing
Frank 7 = 60 trim, 10*clipped TD06H turbine, TD05H 8cm2 housing

GT30 (ball bearing) turbos:
48 trim = 44lbs/min
52 trim = 50lbs/min
56 trim = 55lbs/min
60 trim = 60lbs/min
gt35 trim = 65lbs/min

Garrett:
T-28 = 34lb/min (350BHP)
50 trim = 47lb/min
57 trim = 49lb/min
60-1 = 65lb/min

The following is from Turbonetics Catalog:

On TO4E Compressor housings:
50-trim = 47lbs/min
54-trim = 45lbs/min
57-trim = 49lbs/min
60-trim = 50lbs/min
T-100 = 180lbs/min

TO4B compressor housing:
60-1 = 65lbs/min
62-1 = 70lbs/min