Brake Booster Line

[FORZALANCIA]

Hi guys, i seem to be having a problem with the brakes on series 1, there are none unless i put my foot all the way and when i do it the engine revs drop, so this me suggests a brake booster issue, i just checked my Alquati manifold and noticed on the lhd side there is a fitting which doesnt have any hose on it, so i gather the brake booster vacum line has come off!

I cant seem to locate it tho, can anyone send me pics of the position of where the line runs from the front of the vehicle, many thanks

[mogul_x]

The brake booster should be in the engine compartment, on the right side, mounted on the firewall in the vicinity of the alternator / oil filter - the vacuum line from the manifold does not run to the front of the car. If you look in the engine bay and follow the shift linkage, you should see all of the hydraulic lines that run from the master cylinder, to the booster, and back forward.

[FORZALANCIA]

The brake booster should be in the engine compartment, on the right side, mounted on the firewall in the vicinity of the alternator / oil filter - the vacuum line from the manifold does not run to the front of the car. If you look in the engine bay and follow the shift linkage, you should see all of the hydraulic lines that run from the master cylinder, to the booster, and back forward.

Ok thanks ill check, wat is this then?

[DJ]

THAT looks like you may not even have a brake booster. That is a modification to the stock braking system obviously done by a previous owner. The stock brake master cylinder (and clutch master cylinder) is underneath the dash inside the car mounted on the pedal assembly.

I'd bet that your brake booster has been bypassed and possibly even removed. That's not necessarily a bad thing unless the upgrade was done badly.

Remove the belly pan and look on the far right side of the firewall. As Scott mentioned, that's where the booster should be if it's there.

[FORZALANCIA]

yes i think your correct dj "the original system completely ditched! Wilwood 4 pot callpers and larger discs all round, competiton pedal box with twin resovouirs mounted in front boot, biased for the rear, hydrolic handbrake with separate cylinder under centre tunnel all lines are braided" so why is there a fitting off the manifold without a hose on it and the brakes dont do anything barely.... need to get this fixed asap for a roadworthy

[Darren]

Hi mate,

Do you know any of the history of the car and the modifications done to the car in brake department? Not sure about MOT's or the Aus equivalent, but you may have problems with a hydraulic handbrake.

Do you know what the piston sizes are in the calipers or the sizes of the master cylinders? Miss matched sizing could well account for the long pedal and lack of braking.

If you have a hole in your inlet manifold, you should plug it and maybe look on the floor of the bellypan to see if you can see what fell off. Again, what's the history of the car - did you buy it as a runner, road legal, a fixerupper or what?

Good luck anyway and keep us posted on how you get on.

Cheers

[FORZALANCIA]

Thanks for all the help thus far guys, it much appreciated!

Darren here is the specs of the car, i just got it 2 weeks ago

http://www.classicandsportscar.ltd.uk/more_details.php?uid=4814

and some more pics

[lanciatomcat]

Hi there
I can remember seeing the advert for thsi vehicle. Too many cars then to consider purchase.
Am interested in how the engine cover is stayed. Obviously due to the air-box the stay has been relocated or maybe modified. Picture(s) appreciated at some time.
Enjoy!!
Tom

[FORZALANCIA]

Hi there Tom,

the engine bonnet has been modified to clear the twin carby airbox :). Will take some pics if you like, just let me know.

Well i found out that the fitting on the intake manifold must have been welded up or blocked from the inside so blocking it didnt do anything.

Now if someone could be kind enough to please explain to me how the braking system works on these cars "without" a booster that would be great. A diagram would be perfect!

[lanciatomcat]

Hi there
Would appreciate pictures at top and bottom of the strut to illustrate new fixing.
When convenient.
Best regards
Tom

[FORZALANCIA]

Pics will be up tomorrow Tom

Cheers,
Tony

[Darren]

Thanks for all the help thus far guys, it much appreciated!

Darren here is the specs of the car, i just got it 2 weeks ago

http://www.classicandsportscar.ltd.uk/more_details.php?uid=4814

and some more pics

Hi Tony,

Thanks for the pics and the link. Some nice work been done on that car! I think you'll enjoy it. I'd be interested to hear how it behaves on normal street driving with rally cams. One thing I would maybe look at improving - the dizzy. You can get hold a proper cam mounted end dizzy from a delta or 130tc.

Any update on the brakes?

[FORZALANCIA]

Thanks Darren,

the dizzy works fine, i think its been modified for a better advance curve etc, the brakes unfortunately not, im still trying to figure out what im looking for. Really have to get the car up on the hoist and then ill probably be able to figure it out!

The reason i assumed it was a brake booster issue was because of the drop in revs, only when braking and the harder the braking the more the revs dropped, this could only be caused by a leaking vacum line??

[HF Stinger]

maybe they left the booster in place and connected to the vacuum circuit but bypassed the hydraulic circuit? just thinking out loud... I guess the rear could still be boosted even though the master cyls had been changed too, it will be interesting to find out the culprit.

[FORZALANCIA]

Yes good thinking, hopefully will find it soon!

here are some pics of the clearance for Tom

[lanciatomcat]

Hi there
Appreciate the pictures.
Interesting solution.
Regards
Tom