Drago86

ill gave a run of a aux BP on an s4 vdi intake in about a month, however i dont have anything to compare it to.

mazdaspeed7

I can already tell you dont waste your time. For one, the VDI tuning doesnt work with bridgeports. Two, the runners are too small for stock ports with bolt-ons, let alone a ported motor, especially with any sort of bridge. Voice of experience speaking here. It doesnt work. You want an aux bridge to work right, use a manifold with very short runners like the TWM manifold, or make a custom manifold with seperate runners for each port. They worry about the standalone youre going to need to get any decent numbers out of it. Hope you have deep pockets if you expect it to work.



Gmon, real world observations dont mean a damn thing if you dont understand what going on. Physics works, period. If it didnt, a whole lot of engineers would have wasted their life for nothing.

j9fd3s

bosch was the pioneer of efi, d jet is from 1966-1976 era cars, such as 914 porsches, mercedes used it on the v8 cars from 68-74ish. gm then used the same batch fired map sensor based idea, to which bosch holds the patents, on most of thier cars in the 80's , megasquirt is a tuneable offshoot of the gm system, and as such pays homage to d jettronic.



i dont mean this to say that the megasquirt people stole anything, or that anything about megasquirt is bad. its cool, ive never seen one but it is a nice option for people.

Drago86

I dont really care if it works for crap or not, the motor is out, why not port it? it certainly wont decrease power, and if i end up with stockish numbers, o whell i'll have learned something. Pluse once i get the motor together i allways have the option of a differnt manifold. I'm also going to be going mega squirt eventually, so my less then deep pockets are not a concern, i can do things gradually.

GMON

"Voice of experience speaking here."



So you have run an aux bridge with both the vdi and the short runners. Wow....post some numbers for us.



Gregory

ColinRX7

You won't take his advice for what it's worth? Fine.. Go ahead and make the same mistakes.. It's your choice.



Hey - Anyone got any dyno numbers for reasonable doubt?

GMON

I would totally accept the advice given if it came with some proof. If he has done it and made gobs more power with short runners vs modified stock intake. Im in. You can engineer things all you want on paper but considering the complex and dynamic environment inside of a rotary intake it does not mean anything untill you put your foot on the gas. Thats also a fact. I am also on the BP 6p road so if someone says the s5 intake is crap I want to see the solution and the results. Im not trying to be a jerk just practical.



Gregory

Drago86

He has tried it, though ive never seen dyno numbers. I'm going to try it aswell with dyno numbers however. If it sux bad ill try a differnt manifold, its not likc trying the stock manifold cost me anything.

ColinRX7

How are you being practical by not heeding advice from others who have walked the route already?



You are basically saying "well, since there is no evidence, I'm gonna go ahead and do the same thing and just hope that I don't have similar results".

mazdaspeed7

Gmon and Drago. Both of you need to find the aux bridge thread in this forum. I posted A LOT about my engine. That engine has since been sold, and it was never dynoed. Reason being? I was not willing to spend the money to make it work right, and it ran like complete *** with the setup I had. Ported VDI intake manifold, stock ECU, and full exhaust. My car was slower than stock ports, even though I had a heavily ported engine. So I sold the engine, and went to a slightly more reasonable SP. This engine makes TONS more power than the aux bridge when it was in my car, and with much better drivability.



Im just trying to save you guys the trouble of trial and error. I have been there, I know some of what doesnt work. I encourage you to try to make it work, but dont make the same mistakes I already have. At least make some new mistakes, for yourself and others to learn from.



Gmon, have you not realized that I do know what im talking about when it comes to intake manifold tuning, and on top of that I have been there, and explained why it didnt work? Go find my aux bridge thread, it will be worth the effort.