[Gmecm] L31 Questions part 2

[Jake Tucker]

Michael,
	I'm not very knowlegable on the hardware spec's, but I can
answer a few of your questions.  I am in the process of putting one of
these injection setups on an older 350.  If you have the vortec heads
already, everything else needed is a direct bolt-on.  With the
popularity of the vortec heads, you can now get TPI, TBI, and carb
intakes for those motors.  I expect that you can probably get the Accel
and Edelbrock EFI systems that would bolt up as well.  So to answer your
question on whether you can swap out the injection setup, I would say
that shouldn't be a problem.  You also get a roller cam and crank and
CAM sensors by buying these motors, along with several of the required
sensors regardless of which injection setup you use.
	From what I've read before on other MAF (Mass Air Flow) systems
is that the MAF sensor itself may be the weak link in providing a lot
more horsepower.  The nice part of the MAF systems is that they adjust
to new combinations without as much programming (I have a MAF TPI setup
running a '65 327 w/ '202 valves and a 300hp cam with no re-programming
other than VATS).  There are a lot of people who don't like the MAF for
the cost of the sensor, the air restriction caused by the sensor, and
the difficulty in mouting the sensor.  I've read conflicting reports on
how much the MAF sensor restricts the flow, but my 327 will rev up to
5500 RPM's before it starts looking for more air.  It definitely revs
better than the Holley Pro-jection that was on it before, but that may
have been due to the poor tuning on the Pro-jection.  The vortec MAF
sensors should benefit from 10 years of development, but I don't really
know any specifics.

Jake Tucker


-----Original Message-----
From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On
Behalf Of Michael Kaczmar
Sent: Monday, March 14, 2005 10:22 AM
To: gmecm at diy-efi.org
Subject: [Gmecm] L31 Questions part 2


Thanks to all for the feedback. I am glad to see there is something out
there now. These trucks are very pentiful, and are damn nice truck
engines. I have seen several powertrains in the boneyards for <$500
engine and trans. It'll be nice to snatch one up.  If I get one of these
motors, I want to put more cam in it. Question is, can the stock
injectors handle more flow, or are they marginal at best already? I
figure I can crank up fuel pressure to a point, but are these injectors
specialized and hard to come by? Run in a different impedence range?
Make this system hard to modify or adapt a more common intake onto?? If
I can use standard injectors I'd like to adapt an LT1 intake and fuel
rails onto it (it has been done before) Are there larger injectors
available?






Michael Kaczmar
Creator 77/94/95/96 Caprice a.k.a. Frankenstein LT1/MN6
2004 Impulse Blue GTO, LS1/M12
53 F-100 5.0/T5, Mustang II, T-bird IRS.....
see http://www.geocities.com/abbynrml94 for project pics!!


		
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