Thread: Help with Maxi Drive

Originally Posted by CheekyD1

My old Maxi Drive, one of the 28 spine type, has a T-Piece which I believe T's off the Break booster Line to provide the Vacuum
Is this correct?
Is this the way they all were or did latter models have a better system?
Has anybody had problems with hard break pedal when engaging the Maxi Drive ??

Thanks for the Help

Gaz

Gaz
Leave the brake booster line alone. See if you can find another vac point on the manifold somewhere and hook the Maxi into that. It just reduces strange brake problems. Did the maxi come with a resevoir?????

Justin

Originally Posted by DRanged

Gaz
Leave the brake booster line alone. See if you can find another vac point on the manifold somewhere and hook the Maxi into that. It just reduces strange brake problems. Did the maxi come with a resevoir?????

Justin

Yes Justin that was my thoughts. Thanks for confirming.
I was originally going to tap into the line which goes to the charcoal canister, but I noticed that that has some sort of electronic sensor in the line (which I don’t want to upset when the Maxi engages) and I also have convinced myself that this line might be open through the canister, so not get a full vacuum

Do you have any suggestions, should I just drill and tap a new hole into the plenum?

Yes I do have the resovoir and one way valve

gaz, is there a spot you can tee into just after the throttle plate?

I tapped into my vaccume line through the distributor pipe, worked every time for 10 years I had my maxi-drive.

Rick fitted my front maxi and rigged it through the brake line, as Justin said gives you some pucker moments on the road I changed it back to the system I had before with the rear only, problem solved.

Trav

Originally Posted by harry

gaz, is there a spot you can tee into just after the throttle plate?

There is a spot where I could drill and tap, can you pring your 1/8 bsp tap with you tomorrow

yep

Originally Posted by CheekyD1

There is a spot where I could drill and tap, can you pring your 1/8 bsp tap with you tomorrow

Make sure you have a vacuum cleaner sucking next to the drill bit to take away the swarf. may stop some entering the chamber.

Justin

it's a v8, it can eat ally bits ok!
nah, we didn't need to go in doc.