Hi there, Can anyone shed some light on the difference between the 2.7 and the 3.5 engines found in the 355. Horsepower? torque? upgradability? car value? weight? etc. Can you tell which engine the car has based on the style of airboxes? Sorry if this is a repost, i did a search that didnt turn anything up. Thanks
2.7 has 2 maf's feeding the motor. 5.2 was required when OBD 2 was intro'd and has 1 maf feeding both sides. Other than that the motor is almost identical. IIRC the claimed HP was the same but it was acknowledged to be 20-25 less on the 5.2.
the reason nothing turned up is because 3.5 doesn't exist, it's 5.2 20-25hp? I allways heard 5-10hp. I've had a nearly stock 2.7 dyno'd if anyone wants to compare it to a 5.2 chart.
20-25 is the number we were told at the dealers by Ferrari. Now is that 20-25 less than claimed or actual? All I care about is how the right pedal works and it is pretty good in any of them.
Version # of the Bosch Motronic engine management sys only. 355 stands for 3.5L 5 valves per cyl. Specs. they all carried.
LOL! BTW 95 2.7 F355 with Tubi and K&N filters dyno'd 313whp. And 328whp with manifolds from NAPerformance. Does anyone with a 5.2 near a Dyno Dynamics Dyno want to dyno their car? It'd give us an idea of the 20-25hp claim. I'll pay for the dyno to make things worth while. Dynograph- http://nonturbo.com/noname46.html
James at Norwoods offered to Dyno my 355 with the Tubi/Hyperflows and Gruppe M air intake if that helps with the data collection
Uh is it just me or do those numbers seem pretty low? Are you sure that wasn't a sick engine you dyno'd? 313whp = 359hp @ 15% drive train loss. 323whp = 371hp @ 15% drive train loss. Both numbers are below what the factory claims. Even if there was a 20% drive train loss, that would still put 313whp = 375hp at the crank. Still below the 380hp the factory states on a '95. 20% is ALOT to loose from the drive train, especially since there is no drive shaft on a 355, as on a front engine, rear wheel drive car. So I seriously doubt that there would be a 20% loss in power through the drive train. Unless you did the pull with the parking break on.
The engine was fine as far as I know. The car belongs to lusso64 on here so you can verify that with him if you'd like to. Martin- I think it'd be a fair dyno because your car doesn't have the manifolds but it does have the intake which balances things out a little bit. The only thing I'm curious is what type of dyno is Norwood using? Regards, Kevin
