kgx wrote:for such a modest power goal, the OEM gen3 3SGT ECU would be the best value, and it's already tuned. 350whp is possible on the gen3 ECU as well. a friend has a gen3 motor/ECU in his celica with just turbo/intercooler and he's putting 355whp down. his lambda values are just peachy, running 15psi.
there also exists the possibility of retrofitting a mappable ECU from another make of car. i'm running a honda ECU on my MR2 and i have just as much tunability as any aftermarket ECU, and my engine management cost less than $300.
it's all in how innovative you want to get to solve the problem.
355wheel at 15psi! That's bloody good effort! Now if you'd make those Honda conversion kits for us dummies to plug and play (then map then at our favourite tuner of course) we'd snap them up big style lol
kgx wrote:for such a modest power goal, the OEM gen3 3SGT ECU would be the best value, and it's already tuned. 350whp is possible on the gen3 ECU as well. a friend has a gen3 motor/ECU in his celica with just turbo/intercooler and he's putting 355whp down. his lambda values are just peachy, running 15psi.
How is the stock ECU controlling the larger injectors required to reach this power level?
kgx wrote:for such a modest power goal, the OEM gen3 3SGT ECU would be the best value, and it's already tuned. 350whp is possible on the gen3 ECU as well. a friend has a gen3 motor/ECU in his celica with just turbo/intercooler and he's putting 355whp down. his lambda values are just peachy, running 15psi.
How is the stock ECU controlling the larger injectors required to reach this power level?
gen3 ECUs run 550cc injectors. there's enough fuel there for roughly 400bhp at 11.5:1 at the very edge running non-oxygenated petrol. that's the upper range of what it can do, but for 350bhp, the stock gen3 ecu has been proven fully capable at that modest power level.
allan welsh wrote:
355wheel at 15psi! That's bloody good effort! Now if you'd make those Honda conversion kits for us dummies to plug and play (then map then at our favourite tuner of course) we'd snap them up big style lol
i'm working on it. i suck though. maybe i'll have something by next spring. i have too much fun driving the car when it's warm out to be bothered to finish these projects.
looks like there are some vendors in the US selling the haltech 500 sprint for less than the average price of a powerFC ($600-700), so that would be another option. i have no experience with them though.
yup. you're right. that drops the theoretical upper range to 395bhp @ 11.5:1. still pretty solid for what the OP is trying to do. if he wants to eventually grow beyond that though, a different system would be a better choice.
i need to ask my friend if he smushed his fuel pressure regulator. his celica is the car i tested my generic/cheap gen3 map sensors on.
kgx wrote:yup. you're right. that drops the theoretical upper range to 395bhp @ 11.5:1. still pretty solid for what the OP is trying to do. if he wants to eventually grow beyond that though, a different system would be a better choice.
Can you show your working out? I'm particularly interest in the BSFC value you've used.
Running at 100% duty I calculate that you would need 560cc injectors to reach 355bhp at the flywheel. It would also help to know if the base fuel pressure has been altered.
kgx wrote:yup. you're right. that drops the theoretical upper range to 395bhp @ 11.5:1. still pretty solid for what the OP is trying to do. if he wants to eventually grow beyond that though, a different system would be a better choice.
Can you show your working out? I'm particularly interest in the BSFC value you've used.
Running at 100% duty I calculate that you would need 560cc injectors to reach 355bhp at the flywheel. It would also help to know if the base fuel pressure has been altered.
yup, my math was off. good catch guys.
i need to figure out where he got dyno'd and see what's up with them and why they're fudging the numbers the way they are.
guess i'll file this under "retarded comment for the week."
