Evolution of the 996tt. Who's who.
#76
08-28-2010, 05:51 PM
It is their own piggyback controlling the 2 throttle bodies, all 12 injectors and boost. It works in conjunction with the stock ECU to let it think that everything is being controlled by it. The second set of injectors does not start working until 75mph as far as I can remember, and their car passes Euro4 emission regulations, or even more stringent Swiss emissions rules.
I don't know much about their internal mods other than the engine can rev up to 8600 RPM.
I don't know much about their internal mods other than the engine can rev up to 8600 RPM.
I'm not being nasty, however I highly doubt it is their system. Then again, I have been wrong before. 
#78
08-28-2010, 06:25 PM
It is their own piggyback controlling the 2 throttle bodies, all 12 injectors and boost. It works in conjunction with the stock ECU to let it think that everything is being controlled by it. The second set of injectors does not start working until 75mph as far as I can remember, and their car passes Euro4 emission regulations, or even more stringent Swiss emissions rules.
I don't know much about their internal mods other than the engine can rev up to 8600 RPM.
I don't know much about their internal mods other than the engine can rev up to 8600 RPM.
Mike
#79
08-28-2010, 06:28 PM
and I never said they were speed-controlled, as in load-speed/density-MAF-whatever based
Last edited by GT2996TT; 08-28-2010 at 06:31 PM.
#80
08-28-2010, 06:37 PM
Mike
#81
08-28-2010, 07:00 PM
Registered User
Join Date: Aug 2009
Location: Houston Tx
Age: 39
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Rep Power: 186 
There are also two Bosch injectors per cylinder, so the first injector tapers off a bit as the second injector chimes in near that juicy 4500-rpm mark. From then on, both inject equally. Using one fatter injector would create homologation problems. Bypass valves on the four-barrel Sportec exhaust open at 4600 rpm, adding to the speed ****tail.
from the article linked above
#82
08-28-2010, 07:00 PM
OK. I'll trust you.
I can also tell you for about 2K you can piggy back a Link system that will control dual servo's as well as multiple staged injectors along with any other motor function you want (or don't want). It pulls no power from the ECU. I don't particularly like piggies, but this one works very well.
Anyway, Sportec definitely belongs in the Who's Who.
I can also tell you for about 2K you can piggy back a Link system that will control dual servo's as well as multiple staged injectors along with any other motor function you want (or don't want). It pulls no power from the ECU. I don't particularly like piggies, but this one works very well.
Anyway, Sportec definitely belongs in the Who's Who.
Last edited by cjv; 08-28-2010 at 07:08 PM.
#83
08-28-2010, 07:13 PM
There are also two Bosch injectors per cylinder, so the first injector tapers off a bit as the second injector chimes in near that juicy 4500-rpm mark. From then on, both inject equally. Using one fatter injector would create homologation problems. Bypass valves on the four-barrel Sportec exhaust open at 4600 rpm, adding to the speed ****tail.
from the article linked above
from the article linked above
But then, low boost and no nitrous and the primary injectors work well.
Last edited by cjv; 08-28-2010 at 07:17 PM.
#84
08-28-2010, 07:15 PM
There are also two Bosch injectors per cylinder, so the first injector tapers off a bit as the second injector chimes in near that juicy 4500-rpm mark. From then on, both inject equally. Using one fatter injector would create homologation problems. Bypass valves on the four-barrel Sportec exhaust open at 4600 rpm, adding to the speed ****tail.
from the article linked above
from the article linked above
#85
08-28-2010, 07:16 PM
Registered User
Join Date: Aug 2009
Location: Houston Tx
Age: 39
Posts: 2,496
Rep Power: 186 My guess is this was more than a year ago. In the early days good larger single injectors were not around. Now they are. The only reason we are using duals on our current build is ethanol uses about 30% more fuel for the same power gas delivers. An then ..... there is the nitrous.
article is november 2007, build and design work probably started in 05/06 so there you go..back to the days of very expensive ****ty injectors
#86
08-28-2010, 07:17 PM
My guess is this was more than a year ago. In the early days good larger single injectors were not around. Now they are. The only reason we are using duals on our current build is ethanol uses about 30% more fuel for the same power gas delivers. An then ..... there is the nitrous.
Mike
#87
08-28-2010, 07:18 PM
or go to peak and hold ...... in those days.
Last edited by cjv; 08-28-2010 at 07:29 PM.
#88
08-28-2010, 07:25 PM
#89
08-28-2010, 07:30 PM
Speaking of larger injectors. If memory serves me correctly, EVOMS was the first to use larger injectors on our motors. I should know, I spent a lot of time trying to figure out where Todd Z was getting them.
#90
08-28-2010, 07:42 PM
Chad,
Evoms had a Stage IV and had done one Stage V when I dropped my car off in PA. They were definitely on the cutting edge at the time. Right after the shootout Evoms developed the GT packages and used the hybrid turbo which made great power but reduced the lag of the Stage V turbos.
Evoms had a Stage IV and had done one Stage V when I dropped my car off in PA. They were definitely on the cutting edge at the time. Right after the shootout Evoms developed the GT packages and used the hybrid turbo which made great power but reduced the lag of the Stage V turbos.
Last edited by cjv; 08-28-2010 at 07:47 PM.