MJ vacum - dump valve pipe + map ?
Turbo Mini Forums

Am i ok to put a T peice from the inlet manifold to feed both megajolt and the dumpvalve as ive only got one outlet or does the MJ need a separate feed.

Rick

Edited by cossierick on 4th Nov, 2009.

dump valve / waste gate / boost gauge i wouldnt be too fussed if 2 was T'd off but with mj id (personaly) have mj separate at least

Yes i moved to the darkside

Instagram @jdm_brett

I'd always run the dump valve off it's own hose, boost gauge and map sensor I'd have thought will be fine togeher.

Team www.sheepspeed.com Racing

As Jim said, keep the dump seperate, T the gauge and megajolt together.

Well the boost gauge works through the stack dash so has an electronic sensor tapped into where the servo pipe goes.

I also tapped a pipe in the side of the inlet for the mj but completely forgot about the dump valve.

Would the vacume pipe work on the carb where the dizzy used to go?

Rick

Also gents while im on this, am hopully firing it up next week so has anyone got a map for or close to my engine spec?

1293
15cc omegas
266 cam
1.5 rockers
30/36 head
7.5:1 comp

Rick

Edited by Brett on 4th Nov, 2009.

Yes i moved to the darkside

Instagram @jdm_brett

i 'T' my jolt and dv..

Edited by MarkGTT on 4th Nov, 2009.

yep its been fine Rick, ive seen no probs at all.

Edited by MarkGTT on 4th Nov, 2009.

Thanks brett.

Rick

its fine but on principle i always keep any ecu map sensors to there own feed to the manifold, if your megajolt (spark only obviously) and that hose fails you will loose your boost retard and hole a piston, having it t'd adds 4 un-necesary joints in the pipe and an un-necesarly legnth of pipe any of which could fail.

if you only have 2 vacuum sources, 1 fo the megajolt, one for everything else. on injected cars i like to also give the regulator its own vacuum.

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

Ok denis thanks,

ive only got one vacum point from the manifold so i supose the options are T into it and hope for the best or remove the manifold and drill and tap another port.

rick

Edited by cossierick on 4th Nov, 2009.

Denis - good ponit.. sounds allot safer to run a direct feed to the jolt.

Mark.

I'm running mine T'd just as yours is but from what Denis has said, I'm gonna drill/tap another port this weekend and put the DV on one port and Megasquirt+Boost Controller+Gauge on a separate take-off.

Good point Denis.

Richard.

Minivanless, but reluctantly happy living with the decision. There'll be another one day.
http://www.youtube.com/profile?user=minimadmotorman#p/u

yep, i wont be far behind!

i was sort of generalising towards the hif carbs i haven't used a HS4 since on my 998 years back

Yes i moved to the darkside

Instagram @jdm_brett

Part throttle lean off connection on the HIF, drilled through, gives me readings that I rely on on the boost guage.
Not everyone agrees.