Installed the Roe water/methanol kit on my 96 GTS today. ................ Made the pull and picked up 25 RWHP, torque remained the same. .......
Hi Jim and All,
$379 / 25 RWHP = $15 per RWHP by installing and activating the W/M without any other changes. Not bad, but...
The program I modified for you (Shelby3) to run the W/M made had only one change. As you went past 3.5 PSI boost, the timing retard would drop to 0 as the W/M activates before that point. Most of the guys that have been pushing the envelope open, like Tony, Todd and Trent, are actually running a significant amount of timing advance, especially in the mid-range. Where yours is at 0 retard from stock, running 22 degrees advance total at 4,500, they're adding 10+ degrees advance for total of 32+ degrees spark advance. However, I didn't want to just arbitrarily advance yours like that without someone looking at the plugs and listening for any pinging. You can make more power with tuning and test driving (this is where the $199 software for logging and tuning really pays for itself). Also, keep in mind, as we increase power, we'll probably have to increase the jet size as we're flowing about 15% W/M to fuel. I ordered a handfull of larger jets in case people need them. The pump is capable of flowing enough for 1,500 HP. If an upgrade is needed, we can swap out 1 of the two jets to a larger one (about double in size) since the air inlets merge at the blower inlet. I'd say the standard jets will be good for up to about 700 RWHP, but a car I did Saturday made 682 RWHP / 760 RWTQ and needs one larger jet because it has so much torque and needs more water at low RPM so it can run full timing.
In regard to the HP difference between Shelby3 and MBN's motor, MBN's made 712 RWHP on it's best pull a year ago. Yours is within about 20. Sounds pretty close to me considering the bottom ends were different, but the heads and cams were the same.
Regards,
Sean