458 models' rwhp

The numbers vary because no two dynos are exactly the same. I believe its the Mustang dyno that is ALWAYS low.

On two different dynos my old e39 M5 had numbers of 365 and 330, only one week apart.

Other things like humidity and temperature can also throw off dyno numbers.

 

Here is our Dyno graph of stock vs Fabspeed Performance Package
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There is no question the Dynojet makes the best dynos. The DynoJet 424 series in particular are very accurate and consistent. In addition to my 458 I also have a stock 2011 SLS and we just recently put it on the dyno and got exactly what its rated at the factory. Below is the video of the pull, we will be doing my stock 458 very soon.

https://www.youtube.com/watch?v=doTDIYRXjdU

 

Actually i disagree. I own a mustang MD1100 SE AWD and i can do 5 runs on the same car and the only difference in HP will be from heat soak on the engine itself. The dynojets i've owned and used have never been as consistent. People just don't like mustang dyno's are because they feel that the numbers are too low.

 

The Fabspeed makes sense when considering crank vs rwhp. As a matter of fact it really appears a relatively "small" loss.Best

 

Evan, you seem to be getting Hugh increases in power (of 68 HP) over the stock 458. How is that possible on a naturally aspirated engine that's been tweaked to such high levels already by Ferrari? I can understand the possibilities with a turbo motor but your numbers look a little too high right across the the whole chart to be believeable.

Are you getting check engine lights with the high flow cats or headers?

I would love to here from anyone here if they have installed the Fabspeeds system to their 458 to get their real world perspective of the system.

 

Looking forward to your video. The SLS is a great car!

 

Yeah ~60 ft lbs and ~80 hp starting from base numbers of ~300 ft lbs and ~450 hp seem pretty dramatic. Ferrari left 20% torque on the table when it made its $300K car that could be remedied with different exhaust and ECU flash? Seems incredible to me.

And 450 rwhp on a 570 hp-rated car is low; I'd expect to see 480-500 range.

I'd have to see numbers on an independent, third-party dyno that I can trust, as I have never seen those kinds of percentages for any NA car.

I hope I am wrong, as those are impressive numbers

 

The 458 trapped higher than the McLaren or ZR1?

Not a chance.

 

I did not want to resurrect the "ringer" debate, as that has been discussed ad nauseum.

 

Dyno conditions vary as do the engines themselves from example to example. The common rule of thumb is 15% loss from the shaft through the drivetrain to the wheels. This suggests that 562 x 0.85 = 478 hp is to be expected. The R&T measurement of 497 may be a bit high (some say that Ferrari always sends "ringers" to tests but that is another thread). The Fabspeed number of 451 may be a bit low, but in making mods it is the difference that counts.

 

I think the "ringers" that certain manufacturers are suspected of sending to the magazines are simply cars whose ECUs are ideally tuned for the test location's best available fuel (whether that be 91, 93, E10, E15, etc.), elevation and weather conditions. Customers' cars, meanwhile, are more conservatively tuned for the various fuel quality and driving conditions found all over the world.

If true, is it cheating? It's a bit of a grey area, IMO. The car is simply running the best it can, likely as good as it was when designed and tested at the factory. That said, customers' cars do not benefit from optimized tuning...some will run faster, some slower depending on location. Now, if we're talking about a test car having higher compression, head work, different cams, more boost, etc., then that's obviously a cheater/ringer car. Personally, I don't think the latter happens to often these days.

 

I've seen 50+ RWHP gains on Corvette Z06's with just headers, cold air intake and a tune.

It's totally possible.
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We looked at getting a Mustang dyno but after doing some research we found that some of the local shops were having issues with them. And when we found out that both Underground Racing and AMS both pulled their Mustangs in order to go with new Dynojets we made the decision to go with Dynojet as well. Hennessey also uses Dynojet. I can't say anything bad about Mustang from personal experience but all the big guys seem to be using the Dynojet dynos.

 

With cars in the HP range we are talking, we typically get at least a 50 RWHP increase with just a tune alone. The cars are not tuned for optimum power from the factory. Brenton recently got almost a 60 RWHP increase from a tune alone on my stock Camaro ZL1. Here is the video.

https://www.youtube.com/watch?v=oi0G1XECR_s


This was a stock ZL1 (well, kinda only the CATS were removed which might be worth an extra 2 hp at best). Went from 493 RWHP to 552 RWHP and the air fuel line was much improved as you can see from the video.

 

I agree. And aftermarket sources such as Fabspeed/EVOMs and Novitec claim these kinds of gains for the 458. You may lose some low speed torque due to lower back pressure, but you will more than make it up in the mid and upper RPM range. So some driveability penalty may be in the cards. More importantly you will likely have an emissions test problem and void the warranty if it is still in effect.

 

Isn't it 15% loss for manual tranny and closer to 20% loss for automatics?

 

Can you show us your air/fuel line?

 

Every dyno will read different from another dyno, even if it made by the same manufacturer. The Dyno Jet dyno's are one of the most notorious for reading the highest, then Mustang, then Dyno Dynamics, etc, etc...

But at the end of the day all of the dyno's serve 1 great purpose.. And that is to show you the amount of power gained.

 

I can't speak for other brands but I have had two DynoJets so far and there has been almost no difference in results between them. And I am not so sure if Dynojets read high or if its just that most people are putting up the STD numbers instead of the SAE numbers. The lower SAE numbers that come off the Dynojet have been spot on what manufacturers report their stock power, perhaps its because they are using Dynojets too.

 

PM me and I will be happy to put you in contact with one of our previous customers that had the performance package done.

 

Just for everyones edification I race a Fabspeed tuned 458 in a half mile airfield event from 40mph and he beat me by about 5 car lengths. The track was clean and we both hooked up perfectly. Not sure how much horsepower it would take to do that, but I'd say 50 at a minmum.