Just wondering where 16v DTH ITB folks take their vacuum feed for the servo and MAP sensor - pics would be great. Also, where would I stick an air intake temp sensor? TIA
On a Jenvey throttle body there are some flat areas on the uderside of them. I drilled and tapped mine and used a threaded fitting to connect the servo.
Thanks, I spoke to Bill and he told the same. What type of fittings did you use? Fuel/oil/water ones?
have you all got your map sensor hooked up? Just wondering as i'm still in two minds on mine. Also, shouldnt it be a vacuum take off from all 4 runners for the map? Just interested to see what others have done, using dta as well on mine.
That's the point I'm at - ITBs ordered but want to see how others have done a "vacuum" rail. I'm thinking of running a vacuum rail from all 4 ITBs to a vacuum reservoir (like the green ball on carb cars) and taking the servo and MAP feeds off that.
Mine has vacuum take off from No.1 cylinder - drilled/tapped as described above on underside. I dont use a map sensor - crap with wild cams IMO, my ecu runs off throttle pot, revs, engine temp, air temp. Air temp sensor - fitted mine into back of airfilter Edited by: RobT
Thats why "I" put them there when developing the final version of Jenveys kit. one or 4 choice is yours. one cylinder will run enough vacuum for servo, but if wanting to use MAP sensor I would gang all 4 together into a chamber(tube) as a store to help remove pulsing for ecu. regards bill
What about doing as Rob has done but using the OEM check(?) valve in-line to the servo and running the MAP feed from that? (My ECU has an internal MAP sensor)
rob, thats what im going to run. Yeah, i've heard that map isno good with highly tuned engines, the pressure basically has nothing to do with anything. a decent and well mounted throttle pot does a better job.
All down to choice of ecu to drive em really... but as RobT says, mappable ecu's on atmo wont need MAP sensor input unless altitude is an issue (like in S.Africa from what they tell me) Fruity cams will upset a MAP sensor. More a requirement of boosted motors. rpm vs throttle angle does a good job when setup well. (compensating for water temp and induction temp (marginal) )
