1986 951 LS1 Conversion

hickmaster2001 wrote:I have the Motive Power bleeder and have bled the brakes with that and with the two man method.  The pedal still seems spongy.  Brakes come on quickly but with the hydroboost I can power the pedal almost all the way to the floor.  I am assuming there is air in there still.  Anyone have any advice/tips?  

Thanks!
Mike

I had the same problem on the last one I built. It had the Mustang M/C. Bled it with a power bleeder and Vacuum bleeder. Even tried the pump and hold method with someone in the car.
Finally gave up and drove the car. Once I drove it, I found it wasn't spongy at all. If I breathed on the brake pedal the brakes worked great. With moderate pedal pressure, the car stops very quickly. If I am sitting still though, the pedal feels spongy.

Hotrodz of Dallas,
Thanks for the reply!
Did you drive it this way and leave it?  

I did some hydroboost checks I found online this morning and compared to my 2004 Superduty (Hydroboost brakes) pedal feel.  The Superduty has a similar feel but less travel.  I assume the increased travel on the 951 is due to the pedal length and pivot location because its a modified application.  I am probably going to drive it this way because the brakes work excellent and it may be as intended.  Sometimes I just get wrapped up into something a bit too much...  Let me know if anyone has any other thoughts....

Thanks!
Mike

Yeah I left it this way. Can't feel anything wrong at all while driving. Brakes are very good.
I get caught up in the little things too. Sometimes its worth the time and sometimes its a waste of time.

So I went through this same thing when I installed hydroboost on my project. Here's what I learned after replacing my master cylinder, bench bleeding it, pressure bleeding it, replacing lines, etc.

Removing air from the hydroboost system requires more than just turning the wheel back and forth to let the air work its way out of the reservoir. I discovered this by removing some fluid from the PS resevoir and pressing the brakes with the car off until I cleared out the hydroboost lines and got a firm pedal (I had done this so the reservoir wouldn't overflow and I could confirm I had bled the brakes properly). At that point the pedal was rock hard, so I knew I had successfully bled the brakes. I then started the car and filled the PS resevoir back up as the hydroboost system pulled fluid, the pedal then had the approproiate stiffness both idle and while moving. I had experienced the same thing as you and HotRodz, but even when moving it still just didn't feel right. Since then I discovered "bleeding" the hydroboost system itself, and I've had no problems.

Hope this helps.

Hot Rodz of Dallas,

Thanks for the reassurance!  Sometimes that really helps.....

jpkinerk,

Thanks!  I will give the hydroboost some bleeding attention and see if that helps.  I also need to drive it and re bleed the brakes to get all the little bubbles out.  So the combination of those two things should at least give me peace of mind that there is no air in there.  

Thanks again gents!

Paint is coming along nicely.  Hopefully we will get some booth action this week.....

Mike

Glad to help.

Once your car is finished, you're going to have a lot of fun driving it. Looks very good so far.

Made some headway this past weekend.  Coming along nicely.....

*****Note, I am the cameraman and not in any of the pics.

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That is going to be a very nice ride. Great job!!

Yeah, lookin' sharp. Love that color!

Thanks for the comments guys.  Been working here quite a bit.  Assembly always takes longer than tear down haha....

Few pics from this morning before I started on the interior:

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those last couple pics make me want to build a Ute out of a 944 lol.

looks good.

Everyone, project getting closer to completion here. Some pics of current progress. Still working on little things...

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Great progress! Pics provide good incentive to those of us still working. I'll post some of my own soon. Where did you get your splitter?

dsrracer;

I purchased the front bumper from a company in Germany called FSH (see below):

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It took awhile for shipping but the customer service was great.  They refunded me after about four months with no good tracking info on the whereabouts.  Then the bumper showed and I willingly paid again .  It was kind of a hassle but in the end I think it was well worth it.  It has become one of my favorite parts of the car now.....

I understand why you like it! Looks like you used the light openings for ducts- does it fit the park lights and that's what you chose to do or is that the plan they have for the openings?
Thanks!

dsrracer

Park lights are in there, we blacked them out during the paint process. The fitment of the lights and bumper was great. I only had to drill a few holes. The Fog light holes didn't have backing and I didn't envision using them much so I just used those holes for more airflow. I also filled all the openings with some plastic honeycomb I bought online. Hope that all makes sense. Turned out well.

All,

Been driving the car to work all week. Man, that feels nice. First track time this Friday

Just wanted to share....

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very nice!!

All,

Got out on the track last Friday with the car. Was a blast! Car worked great. Temps were manageable even at 90 degrees on the track. No leaks, couldn't have asked for a better first run. Link to some pics below:

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That is one smoking hot looking car.

Thanks everyone for the compliments, advice, and support. Lots of work, as you all know, and always helps to have folks in your corner. Thanks! Always around for questions on how I did it too.....

That bumper looks great- im gonna order one!

What color and brand paint did you use?

Jasonscottw,

Yeah, I couldn't find another front end solution I liked as much as this one.  I have the stock bumper and debated using a new lower lip but in the end chose this and really like the result.

The color is a BMW base but my neighbor mixed it himself and I watched as he added various elements to make it just the way he liked.  Hopefully I won't need to match it anytime soon as I only have a small amount left now.  We used BASF Glasurit materials for the base color.  

I am really pleased with the results overall and get compliments everywhere I take it.  I haven't gotten much hate from the purists yet but I am sure it will surface....

Thanks!
Mike

That is the exact color I have been looking for- now I'm gonna look into BMW colors.
Closet color I found so far was a Lexus color-

Awesome build. I saw were you used the kooks long tube Ss headers, do you happen to know the part number for these? And did you have any mounting issues with them hitting? Also did you use the conversion oil pan, or did you find another one that worked. Thanks.