MazdaManiac Dyno Day 8/28/10
08-30-2010, 03:12 PM
#278
Also : you won't need the fuel pump - but a good upgrade all the same .
Suggest you mount an extra rad where the 2nd oil cooler would go to get a handle on engine temps .
Last edited by Brettus; 08-30-2010 at 05:02 PM.
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08-30-2010, 04:45 PM
#291
Original Turbo 'd Auto !!
My 04 AT Greddy Turbo got 183 HP and 172 T, my fuel injectors and pump need to be upgraded plus i really need better cooling. Temps were getting up to 236 degrees.... not good. Jeff said with that and another tune could be easy 200 HP.
I'm just happy it runs so smooth and kicks you back in the seat lol.
I'm just happy it runs so smooth and kicks you back in the seat lol.
I agree with Jeff, there' room for improvement in those #'s.
08-30-2010, 07:33 PM
#292
weeeeeeeeee
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PING PING -- I detonated, we think twice when we got back on the dyno after everyone left.
We had thought earlier in the day that I may have a fuel pump problem... @ WOT I was running dangerously lean right around 6500-7000 RPM. It'd be fine up to that point but right around 6500 it was shooting up real bad.
So we had the dyno operator and JPR Jim construct a improv fuel pressure gauge and thinking we'd see a fuel pressure loss. Well pressure held solid at 60PSI all the way up to the point fuel leaned out again and then there was this all to subtle *twink* sound. Made a couple more changes to the map and tried again... ran even richer up to 6500 and wouldn't you efen know it, it *twinked* again.
Current thought is bad injector. Car doesn't feel any different but it was a smidge disturbing to hear detonation. Will have to keep a close watch over things as I await injector cleaning/replacement.
That 180 pull wasn't at full boost either.
We had thought earlier in the day that I may have a fuel pump problem... @ WOT I was running dangerously lean right around 6500-7000 RPM. It'd be fine up to that point but right around 6500 it was shooting up real bad.
So we had the dyno operator and JPR Jim construct a improv fuel pressure gauge and thinking we'd see a fuel pressure loss. Well pressure held solid at 60PSI all the way up to the point fuel leaned out again and then there was this all to subtle *twink* sound. Made a couple more changes to the map and tried again... ran even richer up to 6500 and wouldn't you efen know it, it *twinked* again.
Current thought is bad injector. Car doesn't feel any different but it was a smidge disturbing to hear detonation. Will have to keep a close watch over things as I await injector cleaning/replacement.
That 180 pull wasn't at full boost either.
08-30-2010, 07:40 PM
#293
whines all the way home
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Mine pinged about a half dozen times and became very predictable with the tirtiary ports opening, then it went ping one more time and chunk ca chunck chunck,,, new motor reving was the next sound the car made about a month later
08-30-2010, 08:57 PM
#296
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Damn, how was the car running home? I'm going up to KDR tomorrow so I'll be able to get the engine cover for you. I'll see if they can get upgraded injectors, and a estimate on the new cooling layout Jeff suggested.
08-31-2010, 01:34 AM
#299
His AFR was 11.7:1.
I think the AFR reading was an aggregate of a very lean rotor and a very rich rotor, caused by a secondary injector that is under-performing.
I was commanding 8.5:1 to get that 11.7:1. The other 4-port auto turbo was not so problematic in this regard (though it would sweep from 190° to 236°on a single dyno pull).
08-31-2010, 01:56 AM
#300
He doesn't have P2s - it is a 4-port auto.
His AFR was 11.7:1.
I think the AFR reading was an aggregate of a very lean rotor and a very rich rotor, caused by a secondary injector that is under-performing.
I was commanding 8.5:1 to get that 11.7:1. The other 4-port auto turbo was not so problematic in this regard (though it would sweep from 190° to 236°on a single dyno pull).
His AFR was 11.7:1.
I think the AFR reading was an aggregate of a very lean rotor and a very rich rotor, caused by a secondary injector that is under-performing.
I was commanding 8.5:1 to get that 11.7:1. The other 4-port auto turbo was not so problematic in this regard (though it would sweep from 190° to 236°on a single dyno pull).
I guess the only practical way to check that is flow testing the injectors . Come across this before ? Seems unusual given the accuracy of the stock injectors
Last edited by Brettus; 08-31-2010 at 01:58 AM.