355 Socal 355 Dyno Check-ins

Figured we have enough 355's in Socal with various modifications/setups to start some dyno sessions if anyone is interested. Best way to scientifically measure mods for power is some level of consistency, starting with the dyno, location, and if possible similar ambient temperatures.

If we can all decide on a dyno location and stick with it for testing, that would be good a baseline for making comparisons. Any suggestions would be appreciated. I am open to OC or L.A, but prefer O.C because I hate driving an exotic in L.A .

Doesn't necessarily need to be a dyno day/meet-up. Just a place we can come and go as we please for dyno check-ins. Preferably a place that opens on a Saturday and maybe even late night Saturday for some night testing. Perhaps a small group every now and then to throw down some numbers would be fun too. I'm just interested in finding out what mods do what, so the more data, the better.

At the moment, my car is a good candidate for baseline numbers for a 2.7 car as the only mods it has is an X-OST muffler (very similar to standard Tubi design) and straight pipes. Y-pipe and headers are still stock. If someone has a non-modded 2.7 car ... come through as I would love to see a comparison. I also have a number of basic mods (headers, Y-pipe, GruppeM intake, new muffler.. etc) waiting to go in, so the sooner I do this baseline test, the better.

Thoughts?

 

I also I have buddy who has a 2.7 car with Fabspeed headers, stock Y-pipe (but is going to order a Kriessieg Spiral Y-pipe), straight pipes, Capristo muffler, and stock intake. I'm sure I can get him to come and throw down some numbers.

 

@calder1 still got a dyno?

 

Stock y-pipe I’m assuming?

 

Stock y-pipe? Cats or straight pipe down low?

 

With the different header setups out there, it will be interesting to see where the power band is.

 

I believe challenge cars are still running the stock Y-pipe (has cats). According to Bradan’s test, expect to see 8-10 hp from running a de-catted Y-Pipe.

https://www.ferrarichat.com/forum/threads/bradan-f355-2-7-y-pipe.313866/

 

That’s quite a bit of power pick-up from 200 cell primary cats to straight pipes. I’ve only driven 355’s with primary straight pipes.

 

That is why we’re trying to establish a baseline on the same dyno same location and measure mods from there.

 

Could be more than that if you’re comparing to stock cats instead of 200 cell cats.

 

When that time comes, we should go at the same time. Put your car on the dyno right after mine and you should see some decent gains.

My guess:

5 hp for Tubi headers vs OE.

5 hp for Capristo muffler over X-OST muffler

10 hp for MS Racing Y-pipe over stock Y-pipe.



The X factors in these tests are always going to be timing belts and if they were done correctly optimizing power, and possibly status of guide and if they’re causing leaks.

 

I’ve heard comments here and there over the years euro stock ecu’s are producing more power. Any truth to this?