Smaller brake booster for LS swap with part numbers

ogoz23 said:

Hey guys, I have am 89 S10 Blazer and I want to convert my brake booster to a smaller ones so I have more room with my LS swap. Can you guys please direct me to a link or tell me the part number I would need ETC. I would really appreciate the help. Yes I did research but I couldn't find any concrete info.

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I used an 8" booster from Speedway Motors...works great.

pretty much any 8 or 7 inch booster from anything will work for you. corvette, miata, geo metro. The trick is getting the rod the correct lenght. Buy the $7 dollar rod chekcing tool and make it work.

bk2life said:

pretty much any 8 or 7 inch booster from anything will work for you. corvette, miata, geo metro. The trick is getting the rod the correct lenght. Buy the $7 dollar rod chekcing tool and make it work.

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There are 2 measurements...from the base of the booster to the brake light switch is 6". The gap between the rod from the booster to the plunger in the M/C needs to be .020. It's a pain to adjust because you need really skinny wrenches. I ended up using a set of old JC Penney ignition wrenches. Once you get the gap right, you need to tighten the jamb nut. I would suggest using s piece of 2x4 to press the brake pedal to the floor. That way it's easier to adjust the rod to the M/C. No matter how hard I tried, I couldn't get the gap right...too loose or too tight. I finally went with too tight and rounded up a bunch of washers of varying thickness to fine tune the distance. Ecklers, along with a bunch of others, make a gauge to make measuring easier.

BTW....this is for my setup....your milage may differ.

Is there any braking assist difference between the newer booster vs the smaller early style?
Has anyone done the swap & noticed a difference?

I am using the factory 2002 booster & have access to an early model smaller diameter one.
I am looking to decrease the booster effectiveness & his would be my reason to change it.
My existing brakes are too touchy for my liking.

ogoz23 said:

Hey guys, I have am 89 S10 Blazer and I want to convert my brake booster to a smaller ones so I have more room with my LS swap.

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How badly is the existing booster interfering? Granted my 99 is a 2nd gen, but I simply cut the coil mounting plate, moved the cut piece toward the enter of the truck to where it didn't hit the booster and welded it back together. 1/2 hour job. Cost was 1/8 of a can of Krylon satin black paint and a few feet of mig wire. Granted, I had to leave out one bolt on the coil plate, but it's not going anywhere with the other 6 or seven holding it down.