[Diy_efi] Intercooled question

[Eck, Joel]

Additionally, the MSDS listed for 134a doesn't reveal anything all that =
extraordinary or surprising; in fact, the MSDS for their 12a product =
looks like it's incomplete. Plus, their supporting documentation about =
the evils of 134a looks suspicious to me (it looks modified, but that's =
my opinion).

most people who has been around for the last 15 years or so know that =
some people use freon (regardless of which flavor) to get high, so the =
indications listed for 134a don't surprise me, they are probably in =
there for 12 as well (and 22, 502, etc..). it does surprise me that they =
are not listed for their product, but maybe propane doesn't have that =
effect.

something about running propane around under the hood of a car that =
could conceivably be hit very hard, rupturing the system, bothers me. I =
know most refrigerants are flammable, but propane just seems more =
volatile to me.

now, to put something in to get back on topic:
someone had mentioned to me that they were considering an 'on-demand' =
intercooling setup for use at the dragstrip; namely, using nitrous to =
chill the intercooler when desired, and then venting the nitrous from =
the intercooler into the intake charge ahead of the intercooler. My =
problem with that idea was the possibilty of uneven distribution of =
nitrous throughout the engine, and how to figure out exactly how much =
fuel you would need to add (due to the additional oxygen) without =
blowing the thing up.

-----Original Message-----
From: Programmer [mailto:nwester at eidnet.org]
Sent: Wednesday, June 26, 2002 9:49 AM
To: Diy_efi at diy-efi.org
Subject: Re: [Diy_efi] Intercooled question


If you look at the manufacturers' bottom line, there's only two approved
refrigerants for automotive use. R12 and R134a. I've been doing A/C work =
for
the past 18 years, and R134a often works better than R12 did...and it =
works
just great in a system designed  for R12, regardless of what you =
hear...just
jump through the simple hoops and it's done. Most people tend to =
overcharge
the system since they look at the R12 amount--and think R134a has to be
a similar charge...it doesn't work that way. I could care less what some
website
that promotes alternatives, says...I know what works.

Lyndon
HRAI Certification among others...

----- Original Message -----
From: "Ron Schroeder" <rjs at bnl.gov>
To: <diy_efi at diy-efi.org>
Sent: Wednesday, June 26, 2002 5:46 AM
Subject: Re: [Diy_efi] Intercooled question


> Hi Lyndon,
>
> If you are talking about automotive A/C, R134a is not a very good
substitute
> for R12 in an A/C designed for R12.  Even if the seals and the oil is
> changed, the C/R of the compressor is not correct for R134a in most =
old
> systems.  There are a number of retrofit substitutes for R12 in A/C =
units
> that are far better than R134a.  (R134a is fine in units designed for =
it)
>
> As a phase change coolant for an intercooler, I think there are better
> choices than either R12 or R134a.  Especially if there is a chance of =
not
> full recovery of the coolant.
>
> Ron Schroeder
> WD8CDH
> day 631 344-4561
> nite 631 286-5677
>
> ----- Original Message -----
> From: "Programmer"
> > Guys,
> >
> > R134a is so cheap right now, why look at the other blends ? It's not
cost
> > effective at all to look at a blend, especially when considering
warranty.
> >
> > Lyndon
>
>
> _______________________________________________
> Diy_efi mailing list
> Diy_efi at diy-efi.org
> http://www.diy-efi.org/mailman/listinfo/diy_efi
>




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