How about you hook up boost by gea/traction control and just turn it on and off when you want

Im personally not a fan of boost by gear, it can be a bit of a killjoy. If you have got your boost running closed loop, and have a decent gauge of base duty vs boost pressure, you can always run throttle dependant boost. Set up your aim table in throttle vs rpm, set the values for you aim boost, and in you base duty/normal position table, set up your rpm/boost axis and plug in your base duties, make sure you dont have too aggressive pid settings though, it can end up making it more of a handful.

That said, if you have ethanol based boost aim, to do throttle dependant, you need to make your ethanol content a boost aim trim.

I just find as you have boost aim tied in with throttle, you can keep the car under control a lot better, think of it as a medieval torque request table.

Its a bit of work, but easier than doing steering angle based boost control on a fwd car haha. (Awesome when it works, but a pain to optimise aim values)

robk
I know exactly what you're talking about with the multiple wheel speed sensors and traction control, because that was one of the highlights of my university thesis, which helped me get my previous job at Adaptronic :-D

People have also suggested boost by gear, which I can already activate in my ECU at any time (I already have gear detection working), but I enjoy the challenge of trying to handlle those things myself with the right foot instead of letting the ECU do it.

On the topic of tyres getting sloppy on the dyno...yep, my Federal 595 RSRs turned into a sloppy mess on the dyno lol.

grosso
What size injectors do you run? Thinking of getting bigger ones, could keep engine temps down.

I have Injector Dynamics ID2000, which are much bigger than necessary. Installing bigger injectors won't change your engine temps unless you richen the fuel mixtures, and even then it won't make much difference.

It was leaning out at the top off the rpm range due to waste gate being to small. Did you say you use 50mm gate? If I put a bigger one on I could run lower boost, so I could do 7 laps without over heating the cooling system on a hot day.

I have a Tial 44mm wastegate and it seems to be the perfect size for my application. 

robk
I have a Tial 44mm wastegate and it seems to be the perfect size for my application. 

I l will look for a gate that size then, I saw 50 and 60mm and I thought they where to big.

grosso

robk
I know exactly what you're talking about with the multiple wheel speed sensors and traction control, because that was one of the highlights of my university thesis, which helped me get my previous job at Adaptronic :-D

People have also suggested boost by gear, which I can already activate in my ECU at any time (I already have gear detection working), but I enjoy the challenge of trying to handlle those things myself with the right foot instead of letting the ECU do it.

On the topic of tyres getting sloppy on the dyno...yep, my Federal 595 RSRs turned into a sloppy mess on the dyno lol.

grosso
What size injectors do you run? Thinking of getting bigger ones, could keep engine temps down.

I have Injector Dynamics ID2000, which are much bigger than necessary. Installing bigger injectors won't change your engine temps unless you richen the fuel mixtures, and even then it won't make much difference.

It was leaning out at the top off the rpm range due to waste gate being to small. Did you say you use 50mm gate? If I put a bigger one on I could run lower boost, so I could do 7 laps without over heating the cooling system on a hot day.

If you are leaning out, then your tune is wrong

Admin

grosso

robk
I know exactly what you're talking about with the multiple wheel speed sensors and traction control, because that was one of the highlights of my university thesis, which helped me get my previous job at Adaptronic :-D

People have also suggested boost by gear, which I can already activate in my ECU at any time (I already have gear detection working), but I enjoy the challenge of trying to handlle those things myself with the right foot instead of letting the ECU do it.

On the topic of tyres getting sloppy on the dyno...yep, my Federal 595 RSRs turned into a sloppy mess on the dyno lol.

grosso
What size injectors do you run? Thinking of getting bigger ones, could keep engine temps down.

I have Injector Dynamics ID2000, which are much bigger than necessary. Installing bigger injectors won't change your engine temps unless you richen the fuel mixtures, and even then it won't make much difference.

It was leaning out at the top off the rpm range due to waste gate being to small. Did you say you use 50mm gate? If I put a bigger one on I could run lower boost, so I could do 7 laps without over heating the cooling system on a hot day.

If you are leaning out, then your tune is wrong

Actually in this case it's quite possibly due to Rodney's injectors. He said they're 1000cc, which may sound like a lot, but it's probably not enough when running E85 and 300+rwkw. If the fuel pump or injectors can't flow enough, then it doesn't matter how much you increase the fueling in the tune.

That's true though my point is that the tune should take into account things like this - i.e. it should back off timing when the injector duty cycle reaches 100% to save the engine.
A tune isn't just making sure the mixtures are right and that you get maximum power. It is equally important for the tune to accommodate failure scenarios - high intake temperatures, high oil temperatures, 100% injector duty cycle, high coolant temperature etc.
Even though I have a basic Microtech, we have as much of this programmed in an possible. As soon as things get outside of operating range, timing is reduced and fuel is added. The engine will run terribly in this condition though it will not blow up!
That was my point... :-)

Understood, and I agree about having as many safeguards as possible.
 
However, if we take my car as an example, I have ID2000 injectors (2225cc/min) which reach about 60-65% duty cycle at max revs and full throttle. If we assume that Rodney's car is running the normal fuel pressure, then his injectors are capable of flowing roughly half as much as mine, but mine are using more than half of their duty cycle, which means that Rodney's injectors would definitely be maxed out if he runs 300+rwkw on E85.
 
In other words, if there were safe guards to protect his engine at 100% injector duty cycle, then he wouldn't get very far because he is guaranteed to hit 100% duty cycle very easily.

Correct, though best to dial back the tune instead of KABOOM!
Rodney's tuner shouldn't have given it back to him with injectors running at 100% duty cycle..... Not cool