Help with ITB setup

[xm 80]

hi everyone,

 

i was planing on going the ITB route on my NA Supra, but still getting stuck at the runner length and other different question...sooo maybe someone here could help me out!?!?

did quiet some research on runner length and all sorts of stuff involving a ITB setup and it seems that most of the ITB Supras are using the 4AGE Blacktop throttle bodies and a "runner length" (measured

from the flange of the oem intake to the point where the throttle bodies are mounted) of about 9cm or so +/- 1 cm.

as for my setup i wanted to go with the Jenvey ITBs, since the Blacktop ITBs are hard to find these days and you need at least 2 sets of them to build one set with 6 ITBs.

so and here's my question, can anyone help me finding the correct runner length? i'm a bit confused on how people calculate these runner lengths, cause i have seen numbers as high a 30-40cm to have

a peak torque at 4000rpm (really don't want to rev the engine all the time up to the redline to make some power).

 

next thing would be the volume of an airbox needed for this setup (flame suit on!). since i live in germany it's necessary to be in a decent noice level (+/- a few dB really don't matter here). there are a

few equationts out there to calculate this too, but still i'm not quiet sure if my calculations are correct.....not to mention that the space inside the eingine bay is also pretty restricted.

 

as far as my measurements and calculations have gone i have at least 1-1,5cm of clearance to the strut housing on the passenger side.

 

another question would be, do you guys think that a Syvecs would be a good choice to go for a ITB setup? if everything works out with the airbox i could possibly use a MAP or MAF sensor based engine "tuning" ..or?