Alright, the other intake manifold thread was way too long and way off the topic I want to discuss.
We now know that it has been proven that the RMR intake manifold can potentially add 30-50whp to your 3SGTE. The examples that I can think of are:
1. Bill Price's car, who went from 333awhp to 368awhp. His dyno graph comparison is here: http://home.covad.net/~billprice/Cars/dynocompare.jpg . Bill has a standalone ems for engine control.
2. JekylandHyde from the mr2 board: 258whp to 302whp. The only adjustment made was a 1psi fuel pressure increase. His mods include Supra 550cc/min injectors, SAFC, and HKS VPC, which were left alone. The thread where he discusses this is here: http://www.mr2oc.com/showthread.php?s=& ... genumber=1
Now, here are the issues I'd like to talk about.
- At what power level does it become beneficial to do an intake manifold upgrade? Hyde has shown that 258whp will definitely see good results. What about 240, 230, 220, 200, or even a stock ~150-160? Obviously there is some sort of diminishing returns as we go down in power. But where does it start to make sense?
- How well would the STOCK ecu cope with a bigger manifold? If one had an adjustable FPR, would you be able to properly compensate for this manifold using the FPR and a wideband to tune? Since the stock ECU monitors air flow with the AFM, will the addition of the intake manifold cause an increase in injector duty cycle, or would the duty remain constant since boost is staying the same? Obviously a person in my position would likely find problems with injector sizing, but thats a discussion for another topic. It could possibly be counteracted with enough fuel pressure, but that would have to be tested with a wideband and I'm not sure we can comment on that...
- question for BILL: When you installed the intake manifold, did you make any changes to your fuel or timing maps on your EMS?
- Will the addition of the RMR intake manifold change the engines propensity to detonate? Will the intake charge be cooler because the air is more able to flow freely? Will you risk detonation more simply because there is more air flowing into the engine?
That's all I've got for now. I'd like to see what people have to say about this. Please don't go off topic here. I don't care if you think this manifold is a rip off or not. Lets just talk about how an aftermarket manifold will affect the 3SGTE.
Hopefully this could be useful for people in the future, if there is enough interest in the topic.
Chris
We now know that it has been proven that the RMR intake manifold can potentially add 30-50whp to your 3SGTE. The examples that I can think of are:
1. Bill Price's car, who went from 333awhp to 368awhp. His dyno graph comparison is here: http://home.covad.net/~billprice/Cars/dynocompare.jpg . Bill has a standalone ems for engine control.
2. JekylandHyde from the mr2 board: 258whp to 302whp. The only adjustment made was a 1psi fuel pressure increase. His mods include Supra 550cc/min injectors, SAFC, and HKS VPC, which were left alone. The thread where he discusses this is here: http://www.mr2oc.com/showthread.php?s=& ... genumber=1
Now, here are the issues I'd like to talk about.
- At what power level does it become beneficial to do an intake manifold upgrade? Hyde has shown that 258whp will definitely see good results. What about 240, 230, 220, 200, or even a stock ~150-160? Obviously there is some sort of diminishing returns as we go down in power. But where does it start to make sense?
- How well would the STOCK ecu cope with a bigger manifold? If one had an adjustable FPR, would you be able to properly compensate for this manifold using the FPR and a wideband to tune? Since the stock ECU monitors air flow with the AFM, will the addition of the intake manifold cause an increase in injector duty cycle, or would the duty remain constant since boost is staying the same? Obviously a person in my position would likely find problems with injector sizing, but thats a discussion for another topic. It could possibly be counteracted with enough fuel pressure, but that would have to be tested with a wideband and I'm not sure we can comment on that...
- question for BILL: When you installed the intake manifold, did you make any changes to your fuel or timing maps on your EMS?
- Will the addition of the RMR intake manifold change the engines propensity to detonate? Will the intake charge be cooler because the air is more able to flow freely? Will you risk detonation more simply because there is more air flowing into the engine?
That's all I've got for now. I'd like to see what people have to say about this. Please don't go off topic here. I don't care if you think this manifold is a rip off or not. Lets just talk about how an aftermarket manifold will affect the 3SGTE.
Hopefully this could be useful for people in the future, if there is enough interest in the topic.
Chris