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Author Topic: The Brakmobile  (Read 7967 times)

Jacques

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The Brakmobile
« Reply #15 on: September 25, 2007, 11:52:03 AM »

Mobby, the fuel "economy" of my car is not due to the propane, but to the whole setup, and especially the fact that the engine is really fresh. I bet you can do better than my car if you tune the NYer properly 

As for the Brakmobile, I'm sure it can do a lot better if I raise the compression to some 10-11:1. Propane can handle still more compression, but in a heavy vehicle, say 14:1 can lead to some other troubles.

With the 915 heads, I think I will reach something around 9 (anything better than the stock 8.2 ) I just dont want to change the pistons + rods already, since the mechanical part of the engine is still in such a good shape.


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ex-Mopars 1967 Chrysler Newport Custom Coupe, 1973 Imperial LeBaron 2dr hardtop, 1973 Imperial LeBaron 4dr Hardtop, 1971 Plymouth Sport Fury 2 door hardtop

Mike

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« Reply #16 on: September 25, 2007, 11:58:25 AM »

Shoot , I'll tell you for a trans thats acting up that Imp sure moves,
got to love the TorqueFlite!, Also I agree with Mobby the propane
conversion is awsome, is it substantialy cheaper to fill up with
propane and in time will your intial investment of the propane set up
pay for itself?. And your car sure looks nice, I was a C-Body pretty
mean myself, ask Mobby I get territorial if anyone else touches the
Nyer. To finish this post off whats the fastest you've got that Unit to
roll?

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Jacques

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« Reply #17 on: September 25, 2007, 10:16:08 PM »

The car already had a propane installation in it when I bought it, but I made some changes to it, and also upgraded the ignition (which is very important on propane).
 
The fastest I've pushed it so far is slightly over 132mph, I didnt dare to go faster
 
But on the pics, the car looks much nicer than it actually is, the paint is getting old and loose, and the trunk and rear panels were oversprayed in the past, and they didnt do a good job at it. Besides, there are some rust issues.
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Steve

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The Brakmobile
« Reply #18 on: September 26, 2007, 04:58:22 AM »

Sjak
 
Slight change and going back a few
 
I remember her now.  We talked about her on CB a couple of years ago.  Seems you spend more time with her than. .  .   MMMMMMM
 
Gotta get her into a barge. . .gotta get her in a barge. . .gotta get her into a barge. . .
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Favorite Expression. . . Damned Kids.  Lots of projects.  Donations accepted

Jacques

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« Reply #19 on: September 26, 2007, 05:11:52 AM »

Quote from: POLARACO
I remember her now.  We talked about her on CB a couple of years ago. 
It must have been more recently, she only got the car for a year. I think it was only a few weeks or months ago, someone posted his Bonneville, and I a few pics of her baby. But I'll try to talk her into buying a real car anyway 
 
*EDIT* here it is: http://www.cbodydrydock.com/forum_viewtopic.php?8.40105.10
Sjak Brak2007-09-26 10:15:31
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Leaburn Patey

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« Reply #20 on: September 26, 2007, 05:57:17 AM »

Car looks good cleaned up.Like a tuxedo after the dry cleaners...sharp.
It needed a lady's touch for sure..
Brakmobile? more like Bachelormobile! LOL Just kidding.
As for the tranny not downshifting,have you tried adjusting the kickdown rod at the carb? Or shifting it into 1st manually?
 
CBarge2007-09-26 10:58:54
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Jacques

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« Reply #21 on: September 26, 2007, 12:49:32 PM »


As for the tranny not downshifting,have you tried adjusting the kickdown rod at the carb? Or shifting it into 1st manually?

[/QUOTE]yes, we tried everything already, and I had the speedshop's mechanic look into it (he's VERY experienced with Mopar stuff, especially Hemi's, bigblocks and 727s)... the transmission is really wasted

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James Brown Jr,

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« Reply #22 on: September 26, 2007, 03:08:54 PM »

well sorry to hear about your tranny problems. i really dig that propane conversion. do you know about what it cost you??
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Jacques

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« Reply #23 on: September 27, 2007, 10:39:54 AM »

The conversion in itself didnt cost me much, since the car was already equipped with an installation when I bought it. The modifications on the installation werent very costly either. I bought a modified carburetor from Franz Hofmann (one of the most respected names in the alternative fuel industry, and he's also a real car-guy) and a rebuild kit for the vaporizer, and these 2 pieces were the bulk of the money I spent on the propane-part of the car, some 350 bucks or so.

A complete new installation would cost a lot more, especially tanks are expensive. I estimate that my installation would cost some $1500-$2000 new including having it installed by a pro and approved.

But propane is by no means a performance fuel in itself. You have to build everything on purpose to make power with it. Especially my compression is way too low, 10:1 is probably the minimum acceptable for propane for reasonable performance, and on light cars, up to 14-15:1 will go. Or the other way around, low compression and some serrious boost...




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Jacques

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« Reply #24 on: September 29, 2007, 02:00:13 PM »

300 euros well spent:









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James Brown Jr,

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« Reply #25 on: September 29, 2007, 07:08:59 PM »

i'd say. do you plan on having the whole head redone??
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Mike

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« Reply #26 on: September 29, 2007, 11:08:24 PM »

I still say thats the coolest thing I ever saw to adapt your C to meet
your economic needs without caving in to todays world of tiny sht boxes.

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Jacques

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« Reply #27 on: September 30, 2007, 01:02:47 AM »


Quote from: Foamy_302
i'd say. do you plan on having the whole head redone??
Yes, these 915 heads will be completely reworked: milling, new hardened exhaust seats (because the combustion on propane is hotter), portmatching with the intake, etc. Its an easy way to gain a little compression because these are closed chamber heads.

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Leaburn Patey

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« Reply #28 on: September 30, 2007, 06:36:10 AM »

CAPTION:
I really love you..I could kiss you... Like holding a newborn baby.. 
CBarge2007-09-30 11:36:57
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Leaburn Patey

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« Reply #29 on: September 30, 2007, 06:40:48 AM »

Good score on the 915's Sjak! Investing in headwork is the best palce to out the money.Big blocks love to flow and certainly worth every Euro.
I blew 800.00 on my 452 heads to make em work on my 440.That was 35% of my engine rebuild budget.A sizeable chunk.
I had a friend who spent close to 1200.00 for his race car in head work alone.
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