I was just wandering what a d-shaft mod for a tps is and if i needed it or not to put in itbs on my mazda rx7 13b. also if any of you guys have done this mod and how much hp i should plan on gaining with this mod as well as a megasqurit fuel management.
If any of you guys have a set up that you guys like just let me know thanks.

http://www.tweakit.net/shop/product_...roducts_id=117
here is the website where i am ordering it.
Available Options:
D-Shaft Mod for TPS:
Fuel Rail Type:
Linkages:
Ram Tubes:
Throttle Body Size:
Vacuum Channel:

 

also would it be possible to use the stock lim and uim with the tweakit itb set up? if it is possible is it usefull or would i gain a lot more power to get new ones.

 

I will answer your questions, but ill also give you a tip. I say if you are asking these kind of questions you should do some more research/searching on the forum before doing anything on your car, at least "major" like this.

The D-shaft mod is for the TPS, as in the throttle position sensor, which is an input that your megasquirt will need in order to calculate the A/F mixture.

Tweakit has a 13B manifold that you would need to buy to bolt the ITB's to, as the stock manifolds would not work, nor are they even close.

The HP gain would greatly depend on what else you have done to your car.

 

thanks ya i purchased the itbs kinda quick. i also got the manifold. i have since done pretty much nonstop research on it. i dont think i want to do any porting yet due to the fact that my engine has very low miles and i would like to build it and later see the gains of porting. a few of the other mods i didnt metion to begin with consist of fuel pump, injectors, wideband, light weight flywheel, and full exhaust systems. thanks for the help. i will post pictures of stuff when i get it. itbs are on a 2 week backorder so it probably wont be here for another month. mean while gives me tons of time to figure out how exactly i want to go about doing this.

 

good luck to you.

 

any updates on this one?