AOD/GT40 TRACK/DYNO results in, seem low. Tips on leaning out af ratio?
06-24-2014, 09:56 AM
#1
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AOD/GT40 TRACK/DYNO results in, seem low. Tips on leaning out af ratio?
Just took the mustang in for 1st dyno, and idk number seemed kinda low to me. This was done on a superflow dyno, 2nd to 3rd gear pulls.
So just recently did a stock engine rebuild on my 90 hatch. Added a few mods
gt40 explorer heads/explorer intake, stock ho cam advanced 4 degrees
65mm t/b, 73mm maf
shorty headers, stock h-pipe
3.73s, 2400 stall
Peak hp 210 at 4500rpm
Peak tq 265 at 3500rpm
It was 100 degrees out and car was running a bit hot, but numbers still sound low to me. However it did keep a pretty steady power-torque curve from 3500rpm-5200rpm. Took it to track first time, ran 14.3 at 98mph with street tires and a 2.25 60ft. Im sure with more track time I can better that.
Any input on these numbers? Sound low to me compared to some posts boasting up in the hi 200s. However, seems like a decent gain over stock aod hp numbers posted in the 170hp range in some places.
So just recently did a stock engine rebuild on my 90 hatch. Added a few mods
gt40 explorer heads/explorer intake, stock ho cam advanced 4 degrees
65mm t/b, 73mm maf
shorty headers, stock h-pipe
3.73s, 2400 stall
Peak hp 210 at 4500rpm
Peak tq 265 at 3500rpm
It was 100 degrees out and car was running a bit hot, but numbers still sound low to me. However it did keep a pretty steady power-torque curve from 3500rpm-5200rpm. Took it to track first time, ran 14.3 at 98mph with street tires and a 2.25 60ft. Im sure with more track time I can better that.
Any input on these numbers? Sound low to me compared to some posts boasting up in the hi 200s. However, seems like a decent gain over stock aod hp numbers posted in the 170hp range in some places.
06-24-2014, 11:06 AM
#3
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It was on advice of local machine shop. To make more torque down low at the aod, and take advantage of the power band to shift near 5k. Idk if it cost me any power, possibly. But peak power and torque seems to be near stock ho cam spec of 4500rpm and 3500rpm
06-24-2014, 01:03 PM
#4
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lol, I just answered your thread about this over at Corral forum. And like I said over there, if you'd dyno in better air and correct the A/F ratios, I'd bet you'd see 15-20 hp more. And those AODs really suck the power up. Ever consider a T5 swap, it's the best mod I've ever done. And not that hard.
06-24-2014, 01:49 PM
#6
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Even with the above all stated, it still sounds low to me. I know you can't treat dyno comparisons from car-to-car and dyno-to-dyno as gospel, but mine made 195 rwhp and around 270 rwt with the stock heads/intake/air filter, 10 degrees base timing, an E-fan, no EGR, 70mm MAF, and catless exhaust. That was on a Dynojet so I'm not sure how the Superflow compares. The dyno sheet should have included corrections so its hard to say how much more power you could have made in better conditions. I ran mine in low 80F temps but by the 3rd pull the motor was getting pretty hot. I made the 3 nearly identical pulls.
Even with your auto vs. my 5 speed if all was the same you picked up maybe 10-15hp with the heads and intake which seems quite low. I'd put the cam back to 0 and try it again since it's the easiest and cheapest. Otherwise install a new cam all together. I'm not sure what your shop was thinking by not strongly recommending another $150 for at least an alphabet cam. My stock cam makes "good" low end power and makes HP up to 4800.
Even with your auto vs. my 5 speed if all was the same you picked up maybe 10-15hp with the heads and intake which seems quite low. I'd put the cam back to 0 and try it again since it's the easiest and cheapest. Otherwise install a new cam all together. I'm not sure what your shop was thinking by not strongly recommending another $150 for at least an alphabet cam. My stock cam makes "good" low end power and makes HP up to 4800.
06-24-2014, 06:26 PM
#7
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Thanks, I feel same way about the track. I'll be back out there and hopefully get it down and post back. About the power, with an off road pipe, leaner af mixture at wot, and on a cooler day I'm sure I can increase those numbers. However the more research I do on stock aod dyno numbers, I see 170hp. Even at 180who stock and possibly 250ft lbs of tq I'm looking art potential 45up gain and 20ft lbs of tq on a cooler day. Seems Good for basically throwing n stock explorer heads intake and a larger tb n maf.
06-24-2014, 06:51 PM
#8
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lol, I just answered your thread about this over at Corral forum. And like I said over there, if you'd dyno in better air and correct the A/F ratios, I'd bet you'd see 15-20 hp more. And those AODs really suck the power up. Ever consider a T5 swap, it's the best mod I've ever done. And not that hard.
06-24-2014, 06:55 PM
#10
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Even with the above all stated, it still sounds low to me. I know you can't treat dyno comparisons from car-to-car and dyno-to-dyno as gospel, but mine made 195 rwhp and around 270 rwt with the stock heads/intake/air filter, 10 degrees base timing, an E-fan, no EGR, 70mm MAF, and catless exhaust. That was on a Dynojet so I'm not sure how the Superflow compares. The dyno sheet should have included corrections so its hard to say how much more power you could have made in better conditions. I ran mine in low 80F temps but by the 3rd pull the motor was getting pretty hot. I made the 3 nearly identical pulls.
Even with your auto vs. my 5 speed if all was the same you picked up maybe 10-15hp with the heads and intake which seems quite low. I'd put the cam back to 0 and try it again since it's the easiest and cheapest. Otherwise install a new cam all together. I'm not sure what your shop was thinking by not strongly recommending another $150 for at least an alphabet cam. My stock cam makes "good" low end power and makes HP up to 4800.
Even with your auto vs. my 5 speed if all was the same you picked up maybe 10-15hp with the heads and intake which seems quite low. I'd put the cam back to 0 and try it again since it's the easiest and cheapest. Otherwise install a new cam all together. I'm not sure what your shop was thinking by not strongly recommending another $150 for at least an alphabet cam. My stock cam makes "good" low end power and makes HP up to 4800.
Your baseline seems to be correct for the difference in loss of hp though an aod. However, I'm with u if I can get more gains and efficiency out of this combo. I'll have to play with it and hopefully get it tuned down right and redyno or let the track show me where I'm at