Dyno Results, Opinions welcome
#1
built my own engine
Thread Starter
Dyno Results, Opinions welcome
well i've been having trouble w/ my car eating coolant...so i went to the dyno to see the power results
mods are:
greddy airnix
hkts ss bov
greddy FMIC
bonez downpipe
high flow cat
greddy power extreme
magnecore 10mm wires
93 octane@12psi
i dynoed 294rwhp, 266.9 peak torque with 14:1 a/f ratio and 97.4 peak injector duty, .98kg/cm2 peak boost
now, this is wayy too lean and the boost is spiking too much
do you think my turbos are baked and this is eating my coolant? i have another set i am thinking of swapping on
obviously i need a supra pump and new fuel maps
are these numbers good?
mods are:
greddy airnix
hkts ss bov
greddy FMIC
bonez downpipe
high flow cat
greddy power extreme
magnecore 10mm wires
93 octane@12psi
i dynoed 294rwhp, 266.9 peak torque with 14:1 a/f ratio and 97.4 peak injector duty, .98kg/cm2 peak boost
now, this is wayy too lean and the boost is spiking too much
do you think my turbos are baked and this is eating my coolant? i have another set i am thinking of swapping on
obviously i need a supra pump and new fuel maps
are these numbers good?
#5
built my own engine
Thread Starter
i keep having to add coolant only when i let it sit for a while.....
i drove from macon to atlanta (80miles or so) and added a cup of coolant...
sometimes it needs more, it's erratic
maybe the turbos are shot and they're eating cooalnt
i drove from macon to atlanta (80miles or so) and added a cup of coolant...
sometimes it needs more, it's erratic
maybe the turbos are shot and they're eating cooalnt
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#10
Rotary Enthusiast
Join Date: Mar 2001
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Yeah, thats a ballpark figure that can be pushed either way based on timing and pocketbook.
There is something a little odd about your pull though. At 97% duty cycle you theoretically should not be at 14:1 making 300 rwhp. That much duty cycle at that power level should put you in the 10s AF wise.
Do you have a pic of the sheet?
There is something a little odd about your pull though. At 97% duty cycle you theoretically should not be at 14:1 making 300 rwhp. That much duty cycle at that power level should put you in the 10s AF wise.
Do you have a pic of the sheet?
Last edited by Marshall; 04-29-03 at 01:58 AM.
#14
Eats, Sleeps, Dreams Rotary
Re: Dyno Results, Opinions welcome
Originally posted by 93BlackFD
well i've been having trouble w/ my car eating coolant...so i went to the dyno to see the power results
mods are:
greddy airnix
hkts ss bov
greddy FMIC
bonez downpipe
high flow cat
greddy power extreme
magnecore 10mm wires
93 octane@12psi
i dynoed 294rwhp, 266.9 peak torque with 14:1 a/f ratio and 97.4 peak injector duty, .98kg/cm2 peak boost
now, this is wayy too lean and the boost is spiking too much
do you think my turbos are baked and this is eating my coolant? i have another set i am thinking of swapping on
obviously i need a supra pump and new fuel maps
are these numbers good?
well i've been having trouble w/ my car eating coolant...so i went to the dyno to see the power results
mods are:
greddy airnix
hkts ss bov
greddy FMIC
bonez downpipe
high flow cat
greddy power extreme
magnecore 10mm wires
93 octane@12psi
i dynoed 294rwhp, 266.9 peak torque with 14:1 a/f ratio and 97.4 peak injector duty, .98kg/cm2 peak boost
now, this is wayy too lean and the boost is spiking too much
do you think my turbos are baked and this is eating my coolant? i have another set i am thinking of swapping on
obviously i need a supra pump and new fuel maps
are these numbers good?
Secondly, the rwhp you are making is not indicitive of the trap you posted. You should be around 110 with that much rwhp. Something is up with your set up. I would take it to a qualified rotary mechanic ASAP. IF it was my car i wouldnt even drive it until i got some answers.
#15
Eats, Sleeps, Dreams Rotary
Originally posted by Marshall
Yeah, thats a ballpark figure that can be pushed either way based on timing and pocketbook.
There is something a little odd about your pull though. At 97% duty cycle you theoretically should not be at 14:1 making 300 rwhp. That much duty cycle at that power level should put you in the 10s AF wise.
Do you have a pic of the sheet?
Yeah, thats a ballpark figure that can be pushed either way based on timing and pocketbook.
There is something a little odd about your pull though. At 97% duty cycle you theoretically should not be at 14:1 making 300 rwhp. That much duty cycle at that power level should put you in the 10s AF wise.
Do you have a pic of the sheet?
Once u make 300rwhp or more it is time to upgrade the inj. I know some will disagree but thats my experience with the stock motor/turboes.
#16
built my own engine
Thread Starter
i'm just going to upgrade the fuel pump, that should help
and it's not necessarily my coolant o-ring, it could be a lot of other things
and it's not necessarily my coolant o-ring, it could be a lot of other things
#17
development
Originally posted by 93BlackFD
i'm just going to upgrade the fuel pump, that should help
i'm just going to upgrade the fuel pump, that should help
The pump will hold better pressure...won't add more fuel. Your inj. duty cycle is WAY high for that lean, did Arthur allow you to run WOT with that A:F(assuming you went to th Dynolab.
Originally posted by 93BlackFD
and it's not necessarily my coolant o-ring, it could be a lot of other things [/B]
and it's not necessarily my coolant o-ring, it could be a lot of other things [/B]
Sounds like O-ring denial.
#18
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Join Date: Jan 2003
Location: Gaithersburg, MD / WVU
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14.1 afr is way way to lean for a turbocharged car... On a naturally aspirated engine you want to see about 14:1 at wot throughout the run... but on a car with a turbo your air fuel should start at around 14 and as your boost comes on your air fuel should drop significantly and hold around 10:5- 11:2... some people run leaner but i like the margin of safety for that day the car decides to run lean
#19
built my own engine
Thread Starter
i am running tim's maps on the PFC, he has an upgraded fuel pump, so that's why i ask...
i went to batlground engineering, they're closer to me, and they didn't like the a/f ratios at all, i only did one pull w/ the wideband
i went to batlground engineering, they're closer to me, and they didn't like the a/f ratios at all, i only did one pull w/ the wideband
#23
Eats, Sleeps, Dreams Rotary
iTrader: (2)
If you see 97% duty cycle and with your HP figure, you can't be running at 14.1 a/f. Most likely to be about 10.5 a/f or lower. If you are reading from your RP a/f gauge, you should not worry about it. That one is not accurate because it's not a wideband
Chuck Huang
Chuck Huang
#25
Eats, Sleeps, Dreams Rotary
iTrader: (2)
That's very strange because the injector duty cycle and your HP do not add up right.
stock injectors running at 97% can support about 350-360 HP at the wheel at the 11.5 a/f.
Maybe your fuel pump is bad, fuel filter is clogged, the duty cycle that you are getting is not accurate or the wideband is not accurate.
You should post your dynosheet here. If you are really running at 14.1 a/f, your will have a very bad break up at high rpm and you can see it from the dynosheet.
Chuck Huang
stock injectors running at 97% can support about 350-360 HP at the wheel at the 11.5 a/f.
Maybe your fuel pump is bad, fuel filter is clogged, the duty cycle that you are getting is not accurate or the wideband is not accurate.
You should post your dynosheet here. If you are really running at 14.1 a/f, your will have a very bad break up at high rpm and you can see it from the dynosheet.
Chuck Huang
Originally posted by 93BlackFD
i was hooked to the dyno's wideband, thats just a pic from rikki's car i found
i was making 14:1
i was hooked to the dyno's wideband, thats just a pic from rikki's car i found
i was making 14:1