Quote:
Originally Posted by montauk
Scott - I see that your throttle motor bracket attaches to the two rear breather bolts. Where else does it attach? I like the twin setup.
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There are two press fit dowel pins along with the two breather studs. The two breather studs are actually enough to hold the motors and the bracket in place. The holes in the bracket were purposely drilled just big enough for the studs so there is almost no free play. The dowel pins are present to locate the bracket on the cover and to prevent movement. The forces applied operating the ITBs are not enough to move anything.
The twin DBW motor setup is the best way to go especially since we are using the throttle position sensors in the DBW motors. Not using all the extra linkages required for a bell crank setup as needed with a single DBW motor setup is a very good thing. It’s much easier to setup each bank individually as there is less slop to start with and there are far less linkages to get sloppy or out of adjustment and PID setup is easier/better.
My tuner (works for an IMSA GTP Championship team) basically insisted on the 2 motor setup because of his experience with single motor setups on 2-bank engines.