HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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BOOSTER DELETE

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Bye Bye cereal bowl

Post by xschop on Wed Jun 24, 2009 1:32 am

I put this Tilton Dual MC housing against the firewall....
The cereal bowl is history. I will have to re-figure the pushrod length.
Question, Why did the original cereal bowl put the booster, MC at an upwards angle?....Prevent Air in lines?
I can figure the angle it created and get rid of the bowl and angle right off the firewall. But if I come right off the firewall, the Dual MC setup will stick straight out and still clear the valve cover by an Inch.
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Same features, Wilwood looks "cool"...

Post by gt1scca on Wed Jun 24, 2009 1:54 am




WILWOOD... Razz

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Merger...

Post by gt1scca on Wed Jun 24, 2009 2:05 am

I may merge this thread with the Tilton Dual MC thread...

affraid


Last edited by gt1scca on Wed Jun 24, 2009 2:25 am; edited 2 times in total (Reason for editing : No patent...)

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merger

Post by xschop on Wed Jun 24, 2009 2:07 am

Wilwood or Tilton Compact MC's are the ticket.....
Get your merger on....
I do recognize that the tilton has a 3/8-24 outlet port though....

Hey Dawgz, I also recognize that your strut tower brace is not set-up right......That Heim joint renders it useless.....


Last edited by xschop on Wed Jun 24, 2009 2:27 am; edited 2 times in total
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Must be copyrighted...

Post by gt1scca on Wed Jun 24, 2009 2:26 am

EDIT: Didn't work... Razz

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Re: BOOSTER DELETE

Post by Dawgz83948 on Wed Jun 24, 2009 8:58 am

xschop wrote:Wilwood or Tilton Compact MC's are the ticket.....
Get your merger on....
I do recognize that the tilton has a 3/8-24 outlet port though....

Hey Dawgz, I also recognize that your strut tower brace is not set-up right......That Heim joint renders it useless.....

Is that because it moves? I bought it like that and had to space it out a little to clear the hydroboost. Once it's bolted in i tighten the bar then lock down the locking nuts. What can I use to fix the problem with it?
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Re: BOOSTER DELETE

Post by xschop on Wed Jun 24, 2009 9:24 am

Is that because it moves?

Yes, the heim joint moves and pivots, even moreso since it is spaced far out from the tower clamp.
I will be designing one later and the heim should be affixed between to points on the strut clamp so the forces are properly transferred from tower to tower.
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Strut Brace

Post by gt1scca on Wed Jun 24, 2009 10:53 am

http://www.lindseyracing.com/LR/Porsche/944STRUTBRACE/RD-944-99-00.html



(Kinda pricey, but the mounting is better...)

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Re: BOOSTER DELETE

Post by 948 on Wed Jun 24, 2009 11:53 am

xschop wrote:I put this Tilton Dual MC housing against the firewall....
The cereal bowl is history. I will have to re-figure the pushrod length.
Question, Why did the original cereal bowl put the booster, MC at an upwards angle?....Prevent Air in lines?
I can figure the angle it created and get rid of the bowl and angle right off the firewall. But if I come right off the firewall, the Dual MC setup will stick straight out and still clear the valve cover by an Inch.
The angle is related to the path that the pushrod takes from pedal to booster/MC. The rod should remain as close to parallel with MC bore axis as possible. This will prevent binding and excessive moment loads on the rod and MC
If you were to move items around you could determine the angle needed by the following:
Draw a straight line through 3 points with the pedal fully up.... MC axis, booster axis and pedal pivot centre; the resulting line would be your hypotenuse and the firewall would be your vertical line. Also perform this with the pedal fully depressed, under pressure. Take the difference of the two and that should be close to what you will need.
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Angle of attack

Post by xschop on Wed Jun 24, 2009 12:25 pm

Thanks Paul. I see why the simple single delete plate is machined upwards by 14mm.
However, this Dual MC housing has a 1:1 pivot cam on it and connects to a pushrod via a Heim joint. Since it is best to install it sideways (for valve cover clearance) with the cam directly centered in the firewall hole. I don't see any binding taking place.....
You could actually move it over another 1-1.5 inches if you were to install a Heim-joint on the pedal side.....
I will start designing the adapter plate needed to mount it to the firewall.
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Re: BOOSTER DELETE

Post by Dawgz83948 on Wed Jun 24, 2009 4:28 pm

gt1scca wrote:http://www.lindseyracing.com/LR/Porsche/944STRUTBRACE/RD-944-99-00.html



(Kinda pricey, but the mounting is better...)

Won't work with the hydro boost setup.
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heim

Post by xschop on Wed Jun 24, 2009 4:31 pm

Get rid of the heim joints and install solid rod ends, Even then the offset of that stud will still flex and not transfer forces correctly unless the cross-rod is moved back up against the tower.
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Re: BOOSTER DELETE

Post by 948 on Wed Jun 24, 2009 9:26 pm

xschop wrote:this Dual MC housing has a 1:1 pivot cam on it and connects to a pushrod via a Heim joint. Since it is best to install it sideways (for valve cover clearance) with the cam directly centered in the firewall hole. I don't see any binding taking place.....
You could actually move it over another 1-1.5 inches if you were to install a Heim-joint on the pedal side.....
.
That is one of the main reasons I was looking at that style of mount.....I am glad that you are going to make it happen. It will make Michael happy flower
BTW, did the excel sheet I sent make sense/help?
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spread um

Post by xschop on Wed Jun 24, 2009 10:12 pm

Yeah, the excel sheet is now part of my 8 gig usb drive Very Happy
Hey Paul, I was discussing with Greg that the Wilwood shorty MC's had outlet ports of 1/8"?????
and the Tilton shorties had 3/8-24.....That's confusing, I hope Wilwood tech sheet wasn't a misprint.
What do you think about 2ea of the 1" tilton 75-1000U MC's with all 4 corners of the car having the 4x42mm Lexus calipers? 60-40?
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Re: BOOSTER DELETE

Post by 948 on Thu Jun 25, 2009 9:35 am

xschop wrote:Yeah, the excel sheet is now part of my 8 gig usb drive Very Happy
Hey Paul, I was discussing with Greg that the Wilwood shorty MC's had outlet ports of 1/8"?????
and the Tilton shorties had 3/8-24.....That's confusing, I hope Wilwood tech sheet wasn't a misprint.
What do you think about 2ea of the 1" tilton 75-1000U MC's with all 4 corners of the car having the 4x42mm Lexus calipers? 60-40?

Most of the Wilwood MC's I have seen (I have 2 at work on the bench for an R+D project Razz ) have the 3/8-24 UNF thread for the output....did you check the website?
Also check out AP's products, they are one of the best in the world. AP Racing <==click me!

Email me the details of the calipers, MC's and pedal ratio. I can throw it in the sheet.

Also, are we sure that 1 inch stroke is enough??
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Re: BOOSTER DELETE

Post by gt1scca on Thu Jun 25, 2009 9:57 am

948 wrote:...Also, are we sure that 1 inch stroke is enough??
I'm not 100%...

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Re: BOOSTER DELETE

Post by xschop on Thu Jun 25, 2009 12:22 pm

What is the stock 944 pedal ratio?

I would like to go with the shorties, but the normal lenth MC's will fit also with no problem mounted on this housing, they have a longer throw/stroke....8x42mm pots for a 1" MC, the big question is the stroke length then....
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Re: BOOSTER DELETE

Post by coctostan on Thu Jun 25, 2009 1:27 pm

Tilton determine the appropriate MC sizing for you. You just have to contact them with braking system details.

You really want to get this right from the start. Rear lockup is dangerous. Also, don't rely on balance bar for major adjustments. Get it close from the start and use the balance bar for tweaking and for varying track conditions.

Another option on the pedal is a simple custom setup. This way you can be certain it is stiff enough and it can be drilled for differing amounts of leverage.

Example from a Mustang (http://www.maximummotorsports.com/index.html?http&&&www.maximummotorsports.com/store/index.php?main_page=product_info&cPath=21_88_194&products_id=485):


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Re: BOOSTER DELETE

Post by 948 on Sat Jun 27, 2009 12:14 am

[quote="xschop"]What is the stock 944 pedal ratio?[quote]
My estimate is in the excel sheet I sent.......I don't have it on this computer.


Last edited by 948 on Sun Jun 28, 2009 5:30 pm; edited 1 time in total
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pedal ratio

Post by xschop on Sat Jun 27, 2009 6:28 am

Forgot to reply with the 5:1 ratio that is stock 944.
I am working out the details on putting all 4 corners of the brakes with the Lexus 4x42mm calipers.
Mike the Tilton Rep/engineer recommends using a 5/8" MC up front and 1" MC for the rear to decrease the rear pressure. Greg and I are working out the best solution or upgrade for the rear rotors for the NA cars....
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manual brake setup

Post by turbobob924 on Sat Jun 27, 2009 10:43 am

subscribed. Though I like my hydroboost setup, this would be much "cleaner"!
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firewall plate

Post by xschop on Sun Jun 28, 2009 10:50 pm

Got some 1/4" billet plate for the firewall piece. I think I will screw countersunk bolts thru the backside of this plate to the perpendicular plate that the Balance bar will bolt to. I may also just welsd up some 1/8" steel plate and brace it....
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Re: BOOSTER DELETE

Post by gt1scca on Mon Jun 29, 2009 1:31 am

xschop wrote:Forgot to reply with the 5:1 ratio that is stock 944...
948 wrote:My estimate is in the excel sheet I sent...
5:1 is assisted...7.6:1 for manual, which is what this setup will be. Recalculate xs...it takes more lever to do the same work with no assist. It's also why the FW area needs to be reinforced.

(ya spent too much time on that avatar...)

Razz Razz Razz

EDIT: Make me a plate while you're at it... Cool


Last edited by gt1scca on Wed Jul 01, 2009 10:14 pm; edited 1 time in total

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pedal ratio

Post by xschop on Mon Jun 29, 2009 4:01 am

I thought the stock pedal was drilled 5:1 ????
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Re: BOOSTER DELETE

Post by gt1scca on Mon Jun 29, 2009 12:10 pm

It is...ask Paul to be sure, but he calculated the manual ratio to give ~ 2.5" of pedal travel.

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Re: BOOSTER DELETE

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