Dyno Day

So I was supposed to be doing a set of dyno runs for my other car since it was the BMW club holding the dyno day but in the end the car wasn't ready so I ran my 1995 F355.

Here is a screen capture at about 130+ in 4th (or 5th). As well as the graph. Note that the dark blue line is run 3.

300RWHP and 220RWTQ seems to be in the right range for a 1995 F355 on a dynojet. No carbon came out which was a good sign. Many people commented that the high pitched F1 sound of the Capristo echoed into the business park.
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I have the video, it is screaming, I can't upload it here because it is too large (even making it SD resolution). I'll figure something out.

 

Custom headers (before aftermarket ones were available), hyperflow cats, capristo exhaust. It's unlikely the head is doing anything in fact it might be less than if I had a tubi. The hiflow cats probably add 5 rwhp. The capristo probably does nothing. These thoughts are based on 7 different cars on dyno's with before and after. Rarely does an exhaust consistently give more than a couple % over stock in a car like this. hiflow cats, sure, a bit. Putting 355 challenge rims would probably show a bigger gain (or less loss) than anything else you could reasonably add to it. Maybe a tune but thats about it.


1995 (october), single pump, dual MAF of course, custom header, hyperflow cats, capristo 3.

 

Here is the video:

https://www.youtube.com/watch?v=EQRSyM27T90&feature=youtu.be

 

lol

 

308 GTB.... adjustments? from you? Alex at Daytona? or Felix?

 

hahaah, I just noticed the dyno charts said "Felix" on them.

I can certainly get 330 on a dyno, I just have to find the right one and the right day. Chassis dyno's do vary. What I want to find is someone who has done a before AND after a tune as an example. Based on the rareness of this information from the community, i'd say very few hp can be gleaned out of this car.

 

Yep. Open.

The first run was in 5th and the 2nd was in 4th just to see if there was a difference in power. Both gears open at 2800 RPM and that is about where I started on the runs and did so at full throttle so you don't hear a change. In the raw footage of the video I started a run at about 2200 and you can hear the switch in volume at 2800-2900 but it is low in the range so it isn't all shrilly. The other option is to 50% throttle to say, 5k rpm like it seems in your video and then punch it and the valves then will open at that RPM. I wasn't looking for a "sound" video but what power my car put down so I did the standard dyno routine. (including not shifting gears when on the pull,... dave.). Next year I might do a multi-gear pull for the sound.

It was loud enough you could hear it echo through the business park.

 

It is 4-2-1 and is custom (1st owner). If I was in 5th at 2800+ and smashed the loud pedal, the valve is just immediately open. The only time it goes past the RPM mark is in 2nd if I ease in on 2nd and then mash at say 2500rpm. Then it takes up to about 4k rpm to open.

The valve switching is noticeable. It was so loud at 8k rpm that everyone one plugged their ears or put on protection.