First hand experience with changing to the NBS master cylinder WOW!

[speedygonzales]

OK my RPO label says "JB5
I have 11" rear brake pads (I know cause I just changed them).
The booster label is "DA"

There is this from earlier
Vacuum-boosted:
JB5 = Power Brakes, Disc/Drum, 6,400 lb
JB6 = Power Brakes, Disc/Drum, 7,200 lb
JB7 = Power Brakes, Disc/Drum, 8,400 lb

The page posted by Keith lists under the JB7 column the booster as
18024268/DA
Is that the sticker on it?

If a JB5 is supposed to be the lesser of the three as far as power, why would a JB5 system have a JB7 booster?

Who can help with the booster I have?

[Keith Seymore]

Originally Posted by speedygonzales

I know the most powerful is the hydro JB8.

The question I already asked was isn't the JB7 the most powerful vacuum booster? And are the pages you printed showing the "DA" is a JB7

Yes, and yes.

Originally Posted by speedygonzales

The whole reason this discussion of boosters came up because someone changed from a single to a double. So my natural question is do I have a single or a double?

240S = single
240T = "tandem" = dual
So you have a "double" already.

Originally Posted by speedygonzales

It has "DA" on it and I already posted it's dimensions. Once I figure out what mine is, I can determine if a more powerful booster is available. Capish?

Absolutely.

Originally Posted by speedygonzales

OK my RPO label says "JB5
I have 11" rear brake pads (I know cause I just changed them).
The booster label is "DA"

There is this from earlier
Vacuum-boosted:
JB5 = Power Brakes, Disc/Drum, 6,400 lb
JB6 = Power Brakes, Disc/Drum, 7,200 lb
JB7 = Power Brakes, Disc/Drum, 8,400 lb

The page posted by Keith lists under the JB7 column the booster as
18024268/DA
Is that the sticker on it?

Yes

Originally Posted by speedygonzales

If a JB5 is supposed to be the lesser of the three as far as power, why would a JB5 system have a JB7 booster?

Because aaaaaaaaaaaaaaaallllllllllllllll those other components listed on that chart make up the brake system; not just the booster.

Originally Posted by speedygonzales

Who can help with the booster I have?

I'm not sure...

K

[speedygonzales]

Originally Posted by speedygonzales

I know the most powerful is the hydro JB8.

The question I already asked was isn't the JB7 the most powerful vacuum booster? And are the pages you printed showing the "DA" is a JB7

Originally Posted by Keith Seymore

Yes, and yes.

So???????????? Doesn't this answer the question????????? The JB7 is the most powerful and you said yes the DA is a JB7.

Am I missing something?

[Keith Seymore]

Originally Posted by speedygonzales

So???????????? Doesn't this answer the question?????????

Yes

Originally Posted by speedygonzales

The JB7 is the most powerful and you said yes the DA is a JB7.

Yes

Originally Posted by speedygonzales

Am I missing something?

I'm beginning to wonder.

K

[speedygonzales]

Originally Posted by speedygonzales

Who can help with the booster I have?

Originally Posted by Keith Seymore

I'm not sure...

Originally Posted by Keith Seymore

I'm beginning to wonder.

Your original response was you weren't sure. Do you not understand my confusion?

DA=JB7 the most powerful vacuum booster there is on a 1998 So there is no need to look for a more powerful one. Any more gains will come from either boosting vacuum or something else.

[Keith Seymore]

Originally Posted by speedygonzales

Your original response was you weren't sure.

True - but I've reviewed the charts and now believe that the DA is the "biggest" vacuum booster.

Originally Posted by speedygonzales

Do you not understand my confusion?

I did at one time, but you seem kind of stuck.

Originally Posted by speedygonzales

DA=JB7 the most powerful vacuum booster there is on a 1998 So there is no need to look for a more powerful one. Any more gains will come from either boosting vacuum or something else.

Correct. Time to re-visit the master cylinder swap or look at the foundation brakes at the wheels (calipers, rotors, drums, etc).

Or look at hydroboost.

K