Finally: My BW S366 low boost stock motor dyno
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Rotary Enthusiast
Joined: Jan 2005
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From: hsv al
Finally: My BW S366 low boost stock motor dyno
Finally got my car tuned and on the dyno this weekend. Ray Wilson did the tuning, along with several other waaaaaaaay more impressive cars. My car spend the shortest amount of time on the dyno and was the quickest to tune so thats always a plus.
for the mods:
track forged exhaust manifold
synapse wastegate
bw s366 90* housing
rx7 store intercooler
rx7 store 550/1600 combo
Power FC
3" exhaust. (rotary works ebay special)
stock motor 55k miles
no port matching or anything.
stock ignition.
for the mods:
track forged exhaust manifold
synapse wastegate
bw s366 90* housing
rx7 store intercooler
rx7 store 550/1600 combo
Power FC
3" exhaust. (rotary works ebay special)
stock motor 55k miles
no port matching or anything.
stock ignition.
I just put an S366 on my street driven FD and have started the street tuning process. This really kind of depresses me. I would have guessed much higher. My FD is setup basically the same except it is half bridgeported.
Our FD LeMon made 331 hp and 280 ft lbs at 11 lbs of boost ON A CHING CHONG EBAY T04B ($160 shipped to your door) TURBO. The only difference from yours is that it has an S4 NA rotating assembly and it is half bridgeported as well.
Something is way fucked up here.
Our FD LeMon made 331 hp and 280 ft lbs at 11 lbs of boost ON A CHING CHONG EBAY T04B ($160 shipped to your door) TURBO. The only difference from yours is that it has an S4 NA rotating assembly and it is half bridgeported as well.
Something is way fucked up here.
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Also, I want to point out that I am no Master Tuna.
Your AFR's even look kind of high as if this is an aggressive tune.
Someone set me straight. I want to learn to love my S366!
Your AFR's even look kind of high as if this is an aggressive tune.
Someone set me straight. I want to learn to love my S366!
typically when you run across cells quickly you run a little leaner then it adjusts. you should ramp the AFR's down.
so you would see a higher AFR reading like 14's down to 12's down to 11's as it ramps up in boost. and it should be around 11's for a 12-13PSI boost range. low 11's is what I would do. anything more on pump gas would be 11.0 or 10.9 if it is 14-15PSI on 91 pump around max torque.
He might need more ignition to burn a low 11 AFR???
Those numbers do seem low, just to give you a example my car @ 19 psi puts out 497 and 592 @ 28 psi with the S366. If your planning on only running 13 psi I would recommend you getting a smaller turbo.
Joined: Oct 2001
Posts: 6,279
Likes: 728
From: Florence, Alabama
you results look O K to me.
the primary reason is you have a large compressor wheel and you are powering it at low boost.
the S366 is 7.743 square inches average area.
a PT76, TO4Z, BW S300 63, GT500 are 7 sq inches... they are 550 hp turbos.
your wheel is ten per cent larger.
it is no wonder that it takes you to 4600 to make 200 rwhp. most smaller turbos do it between 3900 and 4300.
peak torque at 5600 looks right for stock ports and your AFR at peak Tq is 11 which is about right.
the 366 really starts to wake up from 20 to 35 psi.
of course tuning is a process and it is wise to start that process where you did boost-wise.
your current injector capacity is good for approx 415 rwhp... so best be careful as you raise the boost
congrats on a successful run.
howard
the primary reason is you have a large compressor wheel and you are powering it at low boost.
the S366 is 7.743 square inches average area.
a PT76, TO4Z, BW S300 63, GT500 are 7 sq inches... they are 550 hp turbos.
your wheel is ten per cent larger.
it is no wonder that it takes you to 4600 to make 200 rwhp. most smaller turbos do it between 3900 and 4300.
peak torque at 5600 looks right for stock ports and your AFR at peak Tq is 11 which is about right.
the 366 really starts to wake up from 20 to 35 psi.
of course tuning is a process and it is wise to start that process where you did boost-wise.
your current injector capacity is good for approx 415 rwhp... so best be careful as you raise the boost
congrats on a successful run.
howard
you results look O K to me.
the primary reason is you have a large compressor wheel and you are powering it at low boost.
the S366 is 7.743 square inches average area.
a PT76, TO4Z, BW S300 63, GT500 are 7 sq inches... they are 550 hp turbos.
your wheel is ten per cent larger.
it is no wonder that it takes you to 4600 to make 200 rwhp. most smaller turbos do it between 3900 and 4300.
peak torque at 5600 looks right for stock ports and your AFR at peak Tq is 11 which is about right.
the 366 really starts to wake up from 20 to 35 psi.
of course tuning is a process and it is wise to start that process where you did boost-wise.
your current injector capacity is good for approx 415 rwhp... so best be careful as you raise the boost
congrats on a successful run.
howard
the primary reason is you have a large compressor wheel and you are powering it at low boost.
the S366 is 7.743 square inches average area.
a PT76, TO4Z, BW S300 63, GT500 are 7 sq inches... they are 550 hp turbos.
your wheel is ten per cent larger.
it is no wonder that it takes you to 4600 to make 200 rwhp. most smaller turbos do it between 3900 and 4300.
peak torque at 5600 looks right for stock ports and your AFR at peak Tq is 11 which is about right.
the 366 really starts to wake up from 20 to 35 psi.
of course tuning is a process and it is wise to start that process where you did boost-wise.
your current injector capacity is good for approx 415 rwhp... so best be careful as you raise the boost
congrats on a successful run.
howard
Howard.. You were right. My pumps are maxed out.
Thread Starter
Rotary Enthusiast
Joined: Jan 2005
Posts: 846
Likes: 14
From: hsv al
i over shot with the turbo mainly for the ability to crank it up. i wanted to buy a turbo only once. so while it may be too laggy now i love how the car drives out of boost like my FB 6pt. megasquirt NA daily better. and when i want to stretch it out the power is there.
i have had less and wanted more before. but now i have more and use it less.
i was thinking a 4:30 or 4:44 diff would go a long way for my car. but then again this is a street / strip car and will never see the lap times my formula Mazda turns.
as far as mpgs i just got this car running. so going from an NA 13B to this fd the last thing on my mind is mpgs. but its probably closer to 20.
i have had less and wanted more before. but now i have more and use it less.
i was thinking a 4:30 or 4:44 diff would go a long way for my car. but then again this is a street / strip car and will never see the lap times my formula Mazda turns.
as far as mpgs i just got this car running. so going from an NA 13B to this fd the last thing on my mind is mpgs. but its probably closer to 20.
i over shot with the turbo mainly for the ability to crank it up. i wanted to buy a turbo only once. so while it may be too laggy now i love how the car drives out of boost like my FB 6pt. megasquirt NA daily better. and when i want to stretch it out the power is there.
i have had less and wanted more before. but now i have more and use it less.
i was thinking a 4:30 or 4:44 diff would go a long way for my car. but then again this is a street / strip car and will never see the lap times my formula Mazda turns.
as far as mpgs i just got this car running. so going from an NA 13B to this fd the last thing on my mind is mpgs. but its probably closer to 20.
i have had less and wanted more before. but now i have more and use it less.
i was thinking a 4:30 or 4:44 diff would go a long way for my car. but then again this is a street / strip car and will never see the lap times my formula Mazda turns.
as far as mpgs i just got this car running. so going from an NA 13B to this fd the last thing on my mind is mpgs. but its probably closer to 20.
I'm with Howard on this one. This turbo really needs to be around 20psi to see the full benefit. To have peak torque at 5500rpm on stock ports, with horsepower like this is another sign of the mismatch.
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