I've searched far and wide on this and there seems to be major discrepancies. I'm trying to locate dyno numbers for a stock 360. Most of the 360 dyno videos I have watched show pull numbers in 4th gear (the videos where you can actually count the gears going up or going down). Correct me if I'm wrong, I believe 5th gear is the gear to run on the dyno since its the closest 1 to 1? Having seen this, it makes me think the data I am seeing all over the internet is skewed for mostly 4th gear pulls and not the actual closest 1 to 1 gearing? Could someone advise which gear we actually want to test and what the specs we should be seeing in that gear for a stock 360? Thanks!
I think an engine will make the same power at the same RPM in any gear so long as it can pull that same RPM. Could be wrong. Tyre pressures, atmospheric pressure, air temp, different dyno, different operators, many variables. All can have quite a variation in rwhp figures. A recent engine I built the dyno guy (engine dyno) made me wait 2 weeks for fine high atmospheric pressure. Tune on a rainy low pressure day and then go racing on a fine high pressure day and lean out and possible engine damage.
I totally get that for sure. I'm just hoping to get a round about figure of what I should be close to if I run 5th gear with SAE. AND the reason why most people are running 4th gear instead of 5th?
Mean. That's some realistic real world stuff right there. Proving how hard it is to get significant gains from a highly strung NA engine. Love it.
Also yet to see a 360/430 engine peak (nose over) on any dyno. They always seem to be still climbing at 8.5k.
I still have the factory dyno report for a warranty engine I installed back in 2002. Factory dyno said 360 HP at the crank.
The engine makes the same power but shorter gearing loses more to inertia. (accelerating the same mass at a faster rate or rpm per second) I run my F355 in 5th
So ESTIMATING a 15% loss from the crank to the wheels would give a round about number of approximately 306 whp in a healthy stock 360?
A bit of added information for my dyno numbers posted above. That is with aftermarket headers, cats, and exhaust. Also deleted air injection, if that matters, and Trevor‘s tune. I believe those are the only modifications on the car that would change power figures. Lastly, for those that do not know, it is a Challenge Stradale. hope the information helps someone. It’s plenty fast for me. Haha.
Lying about horsepower is a very old tradition at Ferrari. In general the super cars and the race cars make claimed HP. Nothing else does.
Sounds like having dyno results around 300 to 310 wheel horsepower would be a good reading for a healthy stock 360. Can you post the report? The 360 engine from Ferrari tested at 360 horsepower at the crank, how fitting! Also shows that true wheel horsepower numbers in the real world would hover around 300whp when tested on a dyno. EDIT: This would be for a base stock 360. Non-CS or GT.
Online quarter mile et mph seems to support 300 rwhp claims. Egs- 3200lb 300 whp yield 12.8 at 112mph 335 whp yields 12.3 at 115
^ Is that a magazine result? For comparison, my F355- 327rwhp 3,364lb raceweight- 12.62 @ 114.15mph And when it was 340rwhp and 3150lb raceweight- 12.40 @ 116.83mph
Car and Driver test results showed even slower results, 13.1 seconds @ 110mph. Which means in this test, the wheel horsepower might be even lower than what we are talking about? https://www.caranddriver.com/reviews/comparison-test/a15142322/aston-martin-db7-vantage-vs-porsche-911-turbo-ferrari-360-modena-f1-comparison-tests/
That 110 mph is a better Ind of hp.. 110 mph lines up w less 300 rwhp….. well below 400 at the crank. trap speed is better Ind of hp vs et.
Looks like your are right. According to calculators with the Car and Driver stats, the WHP is estimated around 285. Image Unavailable, Please Login
My 99 F355 GTS made 289rwhp 230rwtq and ran 13.21 @ 109.1 mph so that aligns but I also think a 360 is faster than that. IMO a healthy stock 360 would be 320rwhp+, 112+ trap speed and 10-20rwhp 1-2mph trap speed gain with exhaust improvements.
I would also think a stock 360 SHOULD be faster than that, but these are the numbers from reputable magazine and a dyno'd crank hp straight from Ferrari. Unless Car and Driver used a bad car?
I looked at Rifledrivers old posts to see if he ever posted the graph. I didn't find a graph but he did state a bit more info back in the day- "I have an official dyno sheet from Ferrari for a US spec 360 and it says 373 HP (DIN) = 368 SAE at 8500 RPM and 37.3 KGM = 270 pounds feet torque at 4750 RPM. Power measured at crankshaft on Ferrari's dyno." Not saying Car and Driver used a bad car but these aren't the easiest vehicles to get good standing start numbers from. There is a huge difference in results vs driving style. C&D tested a Challenge Stradale and it ran 12.4 @ 115mph at 3152lbs. The 360 they tested ran 13.1 @ 110mph at 3291lbs. Is there a real world .7 second and 5mph difference from 139lbs and 25 horsepower? Maybe but I think the 360 can do a bit better than that result.
