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Old 06-24-2021, 08:32 AM   #1
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Dyno before and after

I bought this car in May and it already had 1 7/8 ARH headers, Rotofab and a tune. I had a meth system added and had them re-tune. It's an A10. Do these numbers look low? I know a dyno is just a tool but kinda figured both numbers should be higher.
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Old 06-24-2021, 09:36 AM   #2
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540 with headers, rotofab and tune is super low, esp in STD readout. Should be more like 550ish stock SAE. However, based on the MPH, they are using the wrong gear. Using 1-6 will show lower power output compared to 1:1, 7th gear. 7th gear hits like 180+ mph on the dyno so its obvious they went with a different gear.

That being said, the gains look great with the meth! Any idea what the car made stock in that same gear used above?
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Old 06-24-2021, 10:21 AM   #3
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Quote:
Originally Posted by ZL1 smoke View Post
I bought this car in May and it already had 1 7/8 ARH headers, Rotofab and a tune. I had a meth system added and had them re-tune. It's an A10. Do these numbers look low? I know a dyno is just a tool but kinda figured both numbers should be higher.
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Originally Posted by FoundNemo View Post
540 ... is super low
It's almost certainly the dyno & conditions, not the car. 98F ambient does not help; the IATs will likely be high and the ECU pull timing, which is OK. Air temp is a huge factor with our cars.

So OP, just ignore the absolute #. It's RELATIVE CHANGE you only need be concerned about, and +40/+40 seems fine for just meth, and likely giving you a nice cooling effect at that high ambient. For big power you need air and fuel. You got more fuel, so now you need to get more air into the cylinders. Perhaps a lower pulley and possibly a TB if your rotofab is a big gulp.

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Old 06-24-2021, 11:54 AM   #4
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Quote:
Originally Posted by FoundNemo View Post
540 with headers, rotofab and tune is super low, esp in STD readout. Should be more like 550ish stock SAE. However, based on the MPH, they are using the wrong gear. Using 1-6 will show lower power output compared to 1:1, 7th gear. 7th gear hits like 180+ mph on the dyno so its obvious they went with a different gear.

That being said, the gains look great with the meth! Any idea what the car made stock in that same gear used above?
I do not know what it made stock. I got the car from a dealership with the mods already done.
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Old 06-24-2021, 11:55 AM   #5
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Thanks. The above information is very helpful. I was a little worried. Glad to know it's not the car and is the conditions.
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Old 06-24-2021, 11:58 AM   #6
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FYI my local mustang (dynamic load) puts M6 cars ~500-520 whp, you cannot compare one dyno to another. Going to another local dyno with the same car but Dynojet is roughly 10 hp per 100hp above 600whp. So if I pulled in a 730 whp run it would be ~800 whp on dyno jet. Just use it for the delta!
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Old 06-24-2021, 04:39 PM   #7
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These cars don’t dyno well in 90 degree temps. Once the little heat maker is hot, it’s hard to get air temps back down when it’s 98 degrees.
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Old 06-24-2021, 07:46 PM   #8
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Quote:
Originally Posted by LiqTenExp View Post
FYI my local mustang (dynamic load) puts M6 cars ~500-520 whp, you cannot compare one dyno to another. Going to another local dyno with the same car but Dynojet is roughly 10 hp per 100hp above 600whp. So if I pulled in a 730 whp run it would be ~800 whp on dyno jet. Just use it for the delta!



Dynojets are more accurate though as a whole based on SAE flywheel horsepower.


650 crank +/- 15% drive loss A10 = 552. (which is what most A10 Zl1's make average stock).
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