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manual brake conversion #1509527
09/29/13 01:16 PM
09/29/13 01:16 PM
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Rancho Cucamonga ca
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bill8121 Offline OP
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I'm currently in the process of a whiplash cam swap in my 82 d150 and am concerned about the loss of braking due to the loss of vacuum. I do have a canister but since it's all torn apart am contimplating swapping over to manual brakes. Has anyone done this? Do I have to get a new petal to change the ratio? Will my mc work? Thanks in advance

Re: manual brake conversion [Re: bill8121] #1509528
09/29/13 01:48 PM
09/29/13 01:48 PM
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Iowa
76dodgeboy Offline
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Been discussed a few times. The rod running to the booster/mc is where the main difference is. I believe your current booster will work. You also have to make an adapter plate.

Re: manual brake conversion [Re: bill8121] #1509529
09/29/13 09:36 PM
09/29/13 09:36 PM
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scratchnfotraction Offline
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here is a pic of a stock plate and manaul brake rod which is 7" long.

you can make a plate and use an adjustable brake rod.

you can use the 2 bolt alum MC that is bolted to the booster.

I have no problems in my 88-440 truck with stopping after converting mine to manaul brakes.

also, I run a hughes whiplash in my 85 stepside which has a 91-318, I run the vac brakes on it with no problems.

only time I have noticed the lower vac on the brakes it was sitting still holding the pedel it seems a little soft sometimes but other than that...it drives like normal as it always did.

IMHO, I would keep the vac booster and run the whiplash. it has very nice street manners,low speed drivabilty is a smooth as stock.. just has the funny car idle.

seems mine likes 8* BTDC and a curb idle of 650-750 rpm.

7870005-manualMC#1.jpg (185 downloads)
Re: manual brake conversion [Re: scratchnfotraction] #1509530
09/29/13 09:37 PM
09/29/13 09:37 PM
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scratchnfotraction Offline
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heres the alum plate I amde and the MC bolted up on my 88-440 truck.

7870006-manualMC#2.jpg (181 downloads)
Re: manual brake conversion [Re: scratchnfotraction] #1509531
09/29/13 09:38 PM
09/29/13 09:38 PM
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scratchnfotraction Offline
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I used the white foam gasket that is inbetween the vac booster and firewall as a template to make the alum plate with.

I also used 4 rather large bolts/nuts to bolt my plate to the firewall. which is not needed but all i had on hand at the time.

7870008-manualMC#3.jpg (162 downloads)
Last edited by scratchnfotraction; 09/29/13 09:41 PM.
Re: manual brake conversion [Re: scratchnfotraction] #1509532
10/01/13 12:48 AM
10/01/13 12:48 AM
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Rancho Cucamonga ca
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bill8121 Offline OP
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Thanks for the input. I've had some brake issues that I thought may be booster related. The petal sinks about an inch when I start it and doesn't retract like it shoud. I'm gonna start from scratch and try again. On another note, the cam I took out was a isky .400/.400. Pretty much stock accept the j heads with 2.02 valves. Casting 915. I went with the whiplash, headers and an airgap. Got rid of all the ac crap thats been squealing like a stuck pig. I'm hoping that it really wakes it up. Oh and I'm rebuilding my 727 also with a slightly higher than stock tc. Not gonna go to the track or anything. Just wanna spin the tires if I want. Is anyone running something similar? If so are you happy with it? Oh it's a 318. I know go 360 but this is what I have scrapping pennies to build it.

Re: manual brake conversion [Re: bill8121] #1509533
10/01/13 09:12 AM
10/01/13 09:12 AM
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scratchnfotraction Offline
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are you going roller or flat tappet? I used the hughes cam extention with one of the pro-gear t-chains they have. the whiplash roller cam is a short nose cam but are all very nice pieces for the $.

I removed a lunati voodoo roller cam and went to the whiplash.

they both have specs that are almost identical but the whiplash has the choppy idle. voodoo smooth as stock. both make a 318 run like it should in a truck...not too much but just enuff to know it is not stock.

I used comp 901-16 spring with both voodoo & whiplash roller cams. 7 yrs on the voodoo and 8 months on the whiplash. no problems so far, and I run the poop out of them.

myself I like it, it drives like a stock cam on light throttle,but you deff feel the torque and throttle responce from off idle to redline with it.

it fit the bill for me, I wanted the performance of the voodoo I had,but wanted the choppy idle and drivabilty of the whiplash in a daily drive street truck.

it moves my 85 stepside along ok,will spin the tires with a 2.76 gear,sweet spot is about 60 mph and knocks back a good 18 mpg, sounds nasty idling thru town, smooths righ out around 1800 rpms and pulls strong when you nail it WOT.

I run a q-jet on a LD4B intake with headers/duels stock 727 high stall non lock up TC. with a 2.76 gear 235/75/15 tire.

I am going to a 3.55 gear with a nv4500 5 speed in the stepside, that should be real fun with the whiplash.

on a side note.. my 88-318 with 360 heads worked great with the voodoo cam and would be just as good as the whiplash in it.

I have a 2nd 318/349 stroker going together with the 360 heads, I have the RPM non-airgap intake for it with a whiplash roller cam for a 360 going in it.

also have a whiplash flat tappet going in my 88-440 truck.

did I mention the whiplash is a killer street cam?

Re: manual brake conversion [Re: scratchnfotraction] #1509534
10/02/13 12:40 AM
10/02/13 12:40 AM
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Rancho Cucamonga ca
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bill8121 Offline OP
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Thanks for the input. I bought the same timing chain. I'm wondering if I should advance it 2 deg to compensate for the 2400 stall converter. I'm also considering milling my heads for more compression. Just don't wanna start bumping valves eeek! I know the piston is far down but I've never done anything on this level. I have the eddy 650 also sprung for the summit ignition box. My diff is an 8 3/4 w/3.23 for now. Oh and it's a hydraulic cam. Got the springs to match. Did you mill your heads? I checked the comp before I tore it apart. Bout 120 all around. +\- 5.

Re: manual brake conversion [Re: bill8121] #1509535
11/29/14 01:07 AM
11/29/14 01:07 AM
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Wichita, KS
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tmef Offline
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I hate to bring this old thread back to life but I hit a snag on my truck that I can't find the answer to and hoping someone knows. I put the small diameter, big block brake booster on and it rides hard against the MP valve cover. I decided to go manual brakes using the 1983 master cylinder. I fabbed a cover plate from .063 stainless and need to know if this is the pushrod that will work. Nowhere can I find any dimensions for it.

http://chucker54.stores.yahoo.net/mopeadbrrodp.html


Mopar Performance Adjustable Brake Rod Pushrod


Item# MOPP4510640

$53.95


.

Product Description

This handy threaded brake rod is great when you adapt different master cylinders on Chrysler or Tube Chassis cars.

8345081-1128141746r.jpg (61 downloads)
Re: manual brake conversion [Re: tmef] #1509536
12/10/14 11:36 PM
12/10/14 11:36 PM
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tmef Offline
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Ok, for anyone keeping score, I picked up a P4510640 Adjustable Master Cylinder Pushrod Package and its specs are:

Fully screwed in, from the tip of the ball end to the center of the bolt hole is 7 1/16".

Unscrewed as far as I would take it (about 3 threads engaged), it's 7 15/16" in length.

So it looks like it should work just fine as Scratch said the factory piece is 7".

Re: manual brake conversion [Re: tmef] #1509537
12/11/14 12:25 AM
12/11/14 12:25 AM
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Marysville, O-H-I-O
70Cuda383 Offline
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The swap is easy. Any hotrodder can figure it out. Hardest part is picking the right master for pedal feel based on caliper/cylinder size.

That said, I'm running a whiplash on my 5.9. 222/228, 107 LSA installed at 104. Idles at 8".

My power brakes work fine. Check your booster for leaks


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Re: manual brake conversion [Re: 70Cuda383] #1509538
12/11/14 01:02 PM
12/11/14 01:02 PM
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Wichita, KS
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tmef Offline
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Quote:

The swap is easy. Any hotrodder can figure it out. Hardest part is picking the right master for pedal feel based on caliper/cylinder size.

That said, I'm running a whiplash on my 5.9. 222/228, 107 LSA installed at 104. Idles at 8".

My power brakes work fine. Check your booster for leaks




Thanks but you missed the point of my post a little bit.

Re: manual brake conversion [Re: tmef] #1509539
12/11/14 01:12 PM
12/11/14 01:12 PM
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scratchnfotraction Offline
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sweeet!

I need to order me one for my current project.

Re: manual brake conversion [Re: tmef] #1509540
12/12/14 09:22 AM
12/12/14 09:22 AM
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Posts: 21,345
Marysville, O-H-I-O
70Cuda383 Offline
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Quote:

Quote:

The swap is easy. Any hotrodder can figure it out. Hardest part is picking the right master for pedal feel based on caliper/cylinder size.

That said, I'm running a whiplash on my 5.9. 222/228, 107 LSA installed at 104. Idles at 8".

My power brakes work fine. Check your booster for leaks





Thanks but you missed the point of my post a little bit.





no, not really. you said you were contemplating a swap due to low vacuum. so, are you thinking about the swap, or are you absolutely sure that you want to do the swap, and if so, is it because you want to do the swap, or because you think you don't have the vacuum needed to keep your booster happy?

what does your cam idle at? I told you mine idles at 8" and I have plenty of vacuum for power brakes, and even if I stand there and pump the pedal over and over, I don't use up the vacuum in the booster.

you used about 2 sentences in your post, so with that little of detail, it's hard to tell what you want to do or why you're doing it.

That said, it's your ride, it only has to make you happy. DO what you want to do with it. I was simply offering the other side of the story to your "contemplation" since you hadn't made up your mind yet. sure you can do the swap. nothing wrong with that. but, you may not HAVE to do the swap if you didn't want to.


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Re: manual brake conversion [Re: 70Cuda383] #1509541
12/12/14 04:24 PM
12/12/14 04:24 PM
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dogdays Offline
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I agree, you don't really know what the engine will idle at because you are the "before" picture in the "how to install a cam" story.

My one-size-fits-all solution to the brake problem is spelled H-Y-D-R-A-B-O-O-S-T. If your vehicle has power steering it's a snap. It takes up very little room, feels very progressive and there should be a number available in a good-sized recycle yard.

But you don't know what the cam will do until you install and run it.

R.

Re: manual brake conversion [Re: 70Cuda383] #1509542
12/12/14 10:02 PM
12/12/14 10:02 PM
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Wichita, KS
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tmef Offline
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No, that's where the misunderstanding is. The idle and vacuum problem wasn't me. My issue was just that even the small diameter booster is hitting the MP valve covers. That's why I am doing the conversion. I know how all the posts seem run together sometimes. No harm, no foul.

Re: manual brake conversion [Re: tmef] #1509543
12/13/14 12:33 AM
12/13/14 12:33 AM
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Posts: 21,345
Marysville, O-H-I-O
70Cuda383 Offline
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Quote:

No, that's where the misunderstanding is. The idle and vacuum problem wasn't me. My issue was just that even the small diameter booster is hitting the MP valve covers. That's why I am doing the conversion. I know how all the posts seem run together sometimes. No harm, no foul.




Fair enough. I missed your reply this morning...thought you were the OP! haha. I wasn't quoting or directing my response towards you, you just happened to be the last guy to respond in the thread before I did.


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