PRC 227 with 228r Dyno Results
#1
PRC 227 with 228r Dyno Results
Just wrapped up my 99 BMW 328 LS1 swap and finally got some numbers. Car is running a stock T56 with Stock M3 3.15 gears. Has no A/C or power steering. Car was tuned at Hinson supercars. Car pulls great and can't wait to get some 1/4 mile times this spring. So far it's been a ton of fun surprising a few SRT chargers and TA's
Current mods:
PRC 227
228r 114 LSA
American Racing 1 3/4 headers
Ls6 intake and ported TB
Custom 3 1/2 intake piping
Exhaust is dual 3" to single 3.5"
423 hp
402 tq
Current mods:
PRC 227
228r 114 LSA
American Racing 1 3/4 headers
Ls6 intake and ported TB
Custom 3 1/2 intake piping
Exhaust is dual 3" to single 3.5"
423 hp
402 tq
#6
The guy who tuned it has been doing this for many years and has tuned some really serious cars. I trust his tune and have been running the hell out of the car ever since. Also not sure if it matters or not but in a BMW the only place for the O2 sensors is about 6 inches after the collector on the long tubes. I know the further down stream the O2 sensor is the more it affects the reading.
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#8
11 Second Club
iTrader: (18)
The guy who tuned it has been doing this for many years and has tuned some really serious cars. I trust his tune and have been running the hell out of the car ever since. Also not sure if it matters or not but in a BMW the only place for the O2 sensors is about 6 inches after the collector on the long tubes. I know the further down stream the O2 sensor is the more it affects the reading.
Not only that, but if it really is that lean there should be more power there with a proper mixture. Especially if timing had to be pulled to allow the lean mixture to run without knock retard.
#13
Super Hulk Smash
iTrader: (7)
Stoich is different though with 10% ethanol vs straight gas. That means stoich can be anything between 14.68 to 14.13. And you want you tune around .87-.88 Lamda as most street engines make optimal power there.
So setting Stoich to 14.13 in the HPTuners or EFILive and then running about .88 Lamda ends up around 12.4. You can play with it a little, but the 12.5:1 A/F ratio is a good mark on the E10 blends. On straight gas, 12.8 probably works better.
13.2 is way too lean. Adding gas will add power and a level of safety to the motor.
So setting Stoich to 14.13 in the HPTuners or EFILive and then running about .88 Lamda ends up around 12.4. You can play with it a little, but the 12.5:1 A/F ratio is a good mark on the E10 blends. On straight gas, 12.8 probably works better.
13.2 is way too lean. Adding gas will add power and a level of safety to the motor.
#14
TECH Junkie
iTrader: (2)
I set my stoich at 14.12 and and as stated below command .87 lambda .
Air fuel is between 12.2 -12.5 at wot.
Stoich is different though with 10% ethanol vs straight gas. That means stoich can be anything between 14.68 to 14.13. And you want you tune around .87-.88 Lamda as most street engines make optimal power there.
So setting Stoich to 14.13 in the HPTuners or EFILive and then running about .88 Lamda ends up around 12.4. You can play with it a little, but the 12.5:1 A/F ratio is a good mark on the E10 blends. On straight gas, 12.8 probably works better.
13.2 is way too lean. Adding gas will add power and a level of safety to the motor.
So setting Stoich to 14.13 in the HPTuners or EFILive and then running about .88 Lamda ends up around 12.4. You can play with it a little, but the 12.5:1 A/F ratio is a good mark on the E10 blends. On straight gas, 12.8 probably works better.
13.2 is way too lean. Adding gas will add power and a level of safety to the motor.
#18
LS1Tech Premium Sponsor
iTrader: (4)
Get some fuel into that thing!!
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com