evo 9 with BBK Full @ 30psi on 93oct
Jun 7, 2011, 06:34 AM
#32
Tom, I must say, you are a remote tuning machine....So the owner went from a 3 port to the AEM true boost, turned it up another 1.5psi, and gained almost 50wtq?? Ridiculous....I am assuming you will be testing a Hallman Pro RX MBC with the stiff spring??
No matter what your car is making some great power man...You may loose a little down low with the S2s but the gains up top should be nice...
No matter what your car is making some great power man...You may loose a little down low with the S2s but the gains up top should be nice...
Jun 7, 2011, 09:16 AM
#40
it has a fp 25psi wga. yes the car has arp headstuds. mivec definitely helps. we are testing different boost controllers on the car to test low end etc..
hes actually out testing a AEM tru-boost on it right now.
Let me add though.. if you upgrade to a bigger WGA, you must carefully use it and stay within the turbo manufacturers recommendations for setting boost levels, because if you dont, you risk damage to the turbo
itself by creating excessive heat, overspinning shaft, etc.. this is why you see i have manipulated a MBC curve with the ecu boost on this specific turbo.. because Chad told my customer what boost levels
the turbo could safely do and what it couldnt do.. so we are staying within those limits.
The stock WGA was probably plenty enough, but it never hurts to get a wga closer to the target boost level you choose to run.. it just makes the boost controller have to work less harder is all
hes actually out testing a AEM tru-boost on it right now.
Let me add though.. if you upgrade to a bigger WGA, you must carefully use it and stay within the turbo manufacturers recommendations for setting boost levels, because if you dont, you risk damage to the turbo
itself by creating excessive heat, overspinning shaft, etc.. this is why you see i have manipulated a MBC curve with the ecu boost on this specific turbo.. because Chad told my customer what boost levels
the turbo could safely do and what it couldnt do.. so we are staying within those limits.
The stock WGA was probably plenty enough, but it never hurts to get a wga closer to the target boost level you choose to run.. it just makes the boost controller have to work less harder is all
Jun 7, 2011, 09:20 AM
#41
looks good!
there is no way you should see improvements with an MBC over a 3 port-
unless you arent running it in 3 port interrupt configuration!
I run alot of cars at 30psi (ive even run 40 on a 35R LOL) on pump gas... and we've never had an engine related failure to date
It all comes down to the tune and supporting mods-
people underestimate what a good FMIC does to help with this-
also-
Tcomp- what is your WGDC to reach 30psi peak? if there are no boost leaks- with the grimmspeed you should be around 72-75% on most cars-
cb
there is no way you should see improvements with an MBC over a 3 port-
unless you arent running it in 3 port interrupt configuration!
I run alot of cars at 30psi (ive even run 40 on a 35R LOL) on pump gas... and we've never had an engine related failure to date
It all comes down to the tune and supporting mods-
people underestimate what a good FMIC does to help with this-
also-
Tcomp- what is your WGDC to reach 30psi peak? if there are no boost leaks- with the grimmspeed you should be around 72-75% on most cars-
cb
Jun 7, 2011, 10:29 AM
#42
I honestly find it hard to believe those numbers-
I have many many graphs of cars that we switched from AVC-R's, True boosts, hallman pro's, etc to 3 ports and ALWAYS pick up power up top (rpm dependant control) without loss in spool
as a matter of fact- that flow rate on the BBK wouldnt support a 50wtq gain with 1.5 psi- it just cant happen!
The only thing I could see is that without the car being on a dyno the loading rate of the car was inconsistent or something that showed for that difference-
the only real way to tell, is to strap it down, and test back to back-
Not arguing, just basing this on the fact that we have pretty much EXCLUSIVELY been using 3 ports for 2 years now because of the tuning benefits of them.
cb
I have many many graphs of cars that we switched from AVC-R's, True boosts, hallman pro's, etc to 3 ports and ALWAYS pick up power up top (rpm dependant control) without loss in spool
as a matter of fact- that flow rate on the BBK wouldnt support a 50wtq gain with 1.5 psi- it just cant happen!
The only thing I could see is that without the car being on a dyno the loading rate of the car was inconsistent or something that showed for that difference-
the only real way to tell, is to strap it down, and test back to back-
Not arguing, just basing this on the fact that we have pretty much EXCLUSIVELY been using 3 ports for 2 years now because of the tuning benefits of them.
cb
Jun 7, 2011, 10:45 AM
#43
In a 3port, even if you run 100% WGDC for most of spool up, when it starts gettin near target boost, you have to using a lower WGDC, this makes it spools slower then a MBC.
Jun 7, 2011, 10:50 AM
#45
I've tested adjusting the wastegate arm before (if that's what you mean). I did a test where I tightened it half a turn, 1 full turn, and 2 full turns. The only thing it did was shift my boost spike to the right. It actually induced boost creep. Up to a point it was beneficial (I forget the setting..don't have the data with me). But too much, I didn't like it.