Dyno Day

There is no reason to do a piggy back fuel controller unless you are, um, adding more fuel. Since we have not really undertaken an intake mod yet, this ground is yet to be covered. Believe me, I am still very much interested in an intake system redo. I firmly believe we've done all we can with the exhaust side. Once we figure out how we are goiong to get more air and fuel in, we'll look at piggy-backs. Hmm, how about a light turbo. Heh, I still love that idea.

 

I have a piggy back on my f355. With it you can change timing, add or take fuel out. Works very well and overrides stock computer.

 

bob,

what piggy back did you use?

 

ernie, looks like Vince and I are ready for some hub dyno time ! .......... Vince to show gains from 300 cell to 200 cell cats ...... and ...... I to get a baseline for a series of 355 upgrades I've had stewing in the cauldron for a while ......... so lets pick a day to do this ........

 

Ernie when you do this let me know and ask church to book some extra time so one of his guys can tune my vette racecar on the other dyno while we are there.

 

Will check on what brand of computer was used. Allowed change of fuel and timing on dyno.

 

Cool! I am available any of those days .......... lets see what Vince can do .......

 

thursday friday

 

My car had two unichipQ+ computers piggybacked to the stock computers.

 

Hi Ernie, here we go again:

The following modifications were done:

Race port work on the heads
Lighter valves with stiffer springs
hydraulic valve lifter changed into mechanical valve lifter
High compression ratio pistons (race pistons)
360 crank
Race headers and exhaust without a bypass
Motec ecu and a 10500rpm rev limit
changed race cams
Hi flow injectors
Hi flow fuel pump
Maps sensors instead of mafs
Ported/bigger throttle bodies
Light weight flywheel and race clutch

3 cars have been tested on the dynojet:

Red curve: Standart 355 GTB with sports exhaust (5.2 ECU)
Blue curve: F355 Challenge with modifcations
Green curve: original F430 Challenge

Not too bad guys, what do you think ?

Results is hp measured at the wheels !
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Awesome results! Where did you get the cams/lifters?

 

Very nice. Is the Q+ plug and play or did you have to splice into the OEM wiring harness to tap into the various sensors etc?

 

I didn't do the install but I think the wiring was spliced into the existing so could use the stock sensors etc. My car was really running rich and alot of fuel was taking out in the mid range and really helped throttle response and power. Timing was slightly increased.

 

The peak hp is about 9300 rpm.
There is also a stronger gearbox transfer shaft installed.

 

Great freakin HP numbers on a dyno-jet Andi .... ........ great list of mods too ....

Most of my dyno experience is on a dyno-jet ....... when using that velocity mode of illustration, the gear used will affect measured HP numbers a tiny bit .... the F430 will have a different ratio all together ........ but judging from the F430 plot ..... your 355 would be at about 470-480+HP at the crank .......... do you know what gear was used on the two 355 curves? I just want to know for gnats azz comparison if possible ....... thanks for sharing!!!

 

Subscribing to this thread.

Next time you have a group day at the dyno I want to know how much my little red car is making.