Chevy big and small block engines

[Bill Allen]

You will probably have problems with a one-throttle body per cylinder
arrangement. MAP and/or mass airflow sensing is almost impossible due to
pulsations at low and mid-range. You are much better off with a single
throttle body on a plenum with one injector per cylinder. The plenum
will average out the pulsations over all the cylinders. 

As for methanol, that is a can of worms with EFI. Although there are
injectors out there that will flow enough (remember that you are going
from 12-15:1  AFR down to 5-6:1), they are going to be very difficult to
find. I have been looking around for a source, possibly the Indy guys,
but so far no luck. If anyone knows where to find such items, I'd be
very interested too.

	-----Original Message-----
	From:	Clive Apps   Techno-Logicals   416 510 0020
[SMTP:clive at problem.tantech.com]
	Sent:	Friday, June 19, 1998 7:48 AM
	To:	diy_efi at efi332.eng.ohio-state.edu
	Subject:	Re: Chevy big and small block engines


			> > 
			> > Anyone have any idea what the weight of a
350 SB as compared to a 427/454
			> > BB is ?? and then the same with alloy heads.
		> 
		> Quick check shows bare block weights to be 269-272 lbs
for
		> BB and 90(AL)-186 lbs for SB.  Heads (ea) are... 27.5
lbs(Al
		> BB) (cast iron not shown) and 19.5-42.5 lbs for SB 
			> >From Chevrolet Power manual.
		> 
			> > Next question. what is the ideal EFI
setup....stock TPI or a manifold with
			> > one throttle body per cylinder, or just a
modified Corvette TPI
			> > setup...maybe aftermarket computer, bearing
in mind also we may be looking
			> > at methanol also
		>  
			> > The end result has to be a dirt track engine
producing around 500-600hp
			> > from as little capacity as possible with a
maximum of 434ci

	bore a 400 SB and you can get your 434
	a set of Brodix or similar heads and you got your 600 HP in a
small package
	Clive