Dyno'd my 964
Thread Starter
Intermediate
Joined: Jul 2017
Posts: 35
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The number I posted is showing at the wheels. I've gone over it with the dyno team, and they are confident these are accurate numbers. I'm at a loss because this is obviously much higher than expected, but until I hear a reason why this is incorrect I have to believe that this is in fact the numbers my car is putting out.
Thread Starter
Intermediate
Joined: Jul 2017
Posts: 35
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Yeah it doesn't make any sense to me at this point. Short of ripping apart the engine to look at the internals and adding up mod gains, for now I'm going to reluctantly rely on the data provided by a tried and tested dyno shop.
Pro
Joined: Dec 2017
Posts: 559
Likes: 21
The number I posted is showing at the wheels. I've gone over it with the dyno team, and they are confident these are accurate numbers. I'm at a loss because this is obviously much higher than expected, but until I hear a reason why this is incorrect I have to believe that this is in fact the numbers my car is putting out.
Run it on a Mustang dyno then let us know the results. Or, get a Vbox and make a few pulls. If those numbers are accurate you should be able to run 0-60 in the low 4’s.
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Thread Starter
Intermediate
Joined: Jul 2017
Posts: 35
Likes: 0
Those aren't the only mods done, exhaust has been done, ecu has been done, intake has been modified. I was just stating that there is a $10,000 (1993 dollars, roughly $17,500 today), engine mod that I have no idea what it includes.
Racer
Joined: Apr 2013
Posts: 326
Likes: 21
I am in the middle of a very long build and have had my engine built up from a 3.6 to a 3.8, lots of internal work done but still running Motronic. Just added a 3.8 RS VRAM to the mix and everything associated with that (can't thank the RL community enough to recommend where to look, research and to source parts). For a point of reference, I will update my build thread here shortly with more info, but in today's dollars I am in 4x your $17.5K in parts, labor, etc. and just bench dynoed and tuned at AASCO Performance making at the crank 318.4 hp (6500 RPM) and 273.2 (5400RPM). When I get the C4 Targa together in the next few months, I will throw it on a 4 wheel dyno to see how it compares to the bench. Was told that this bench dyno is stingy so I imagine others may be generous just like wheel dynos. In the end it is only a number that reflects what we feel by the seat of our pants...I can't compare my car to yours or any other unless that motor was tested on the same bench. The only time bragging rights are legit is on the day that we all get together and run our car on a dyno day...same dyno, same conditions, whether it is stingy or generous. Congrats on the strong numbers, hope the seat of the pants measure up to your expectations.
Rennlist Member
Joined: Dec 2013
Posts: 714
Likes: 188
My Stock RSA dyno’d at 230 whp, after full header back exhaust, sport Cats, open intake box and SW chip, we were able to get 250 whp on a custom tune.
I was told that’s about maxed out for bolt on upgrades.
soo... your car definitely has some other internal upgrades if the dyno is accurate.
I was told that’s about maxed out for bolt on upgrades.
soo... your car definitely has some other internal upgrades if the dyno is accurate.
Burning Brakes
Joined: Jan 2012
Posts: 782
Likes: 16
From: Cheshire UK
My Unit 11 rebuilt 3.6 C2 with cams, head work, injectors, cat bypass with cup pipe and set up on the rollers gave 282 whp @6300 265 ft/lb @5200. The cams used gave great results, the motor has excellent midrange torgue and pulls strong even down @2000rpm where it makes about 170ft/lb.
Racer
Joined: May 2006
Posts: 290
Likes: 5
I have a new friend that used to have a dyno shop. During his tenure he had 3 different dynos, and kept the one that would consistently show the highest HP numbers the longest. I asked him about that, and his reply was that most guys would prefer optimistic HP numbers over a lower (perhaps more accurate) number, even went on to say he had a few disgruntled guys who didn't like the number they got. He did all American cars though, here in the rural south. You know the old joke; Bubba: "Wanda tell me the truth, tell me you ain't never cheated on me"; Wanda: "Do you want me to tell the truth, or tell you I ain't never cheated?"
An older Porsche buddy of mine says that every HP over stock usually costs between $1000 and $2500 a pony, not sure how true that is, but probably not far off.
An older Porsche buddy of mine says that every HP over stock usually costs between $1000 and $2500 a pony, not sure how true that is, but probably not far off.