NetNews Usenet Archive 1992 #16/NN_1992_16.iso/spool/rec/autos/tech/10118

Internet Message Format | 1992-07-25 | 3.3 KB

Path: sparky!uunet!sun-barr!ames!pacbell.com!pacbell!oracle!pyramid!pyramid.com!rrosen
From: [e-mail] (Randy Rosenberg)
Newsgroups: rec.autos.tech
Subject: Re: Increasing power?
Message-ID: <[e-mail]>
Date: 24 Jul 92 19:24:36 GMT
References: <[e-mail]>
Sender: [e-mail]
Reply-To: [e-mail] (Randy Rosenberg)
Distribution: usa
Organization: Pyramid Technologies, Mt. View, California.
Lines: 75


You could try 4.11's in the rear end.  It will definately help your
off the line and 1/4 mile times, yet it will destroy your highway
gas mileage.  I don't think that trying to increase your horsepower
by swapping the intake manifold will help much.

You could try nitrous, but I think your need resides in the low end
area which lower gearing will give you.  If 4.11s are too much, you
could try 3.87 (I think, anyway it's 3.something-higher-than-07).

Good luck. and let us know what you do.

Regards,
Randy

In article <[e-mail]>,  (Eric Youngblood) writes:
|>
|> Does anyone have any ideas on how to increase the power produced by a
normally
|> aspirated V-8 engine?
|>
|> What I've got is a 77 TA w/ the Pontiac 400 cid engine. It was
overhauled about
|> 10k miles ago which included a mild performance street cam (intake
.465 / 214 dur
|> @ .050, exhaust .480/224 dur @ .050). The heads had a "street-comp"
port and valve
|> job (whatever street-comp is?). It has forged aluminum pistons and
runs at 9.0:1
|> compression. The entire crank assembly has been balanced & bluprinted.
|> Its induction starts with the open scoop at the base of the
windsheild through a
|> K&N cotton/wire mesh air filter, Holley 650 vac sec "emission" legal
carb. It has
|> the original stock Pontiac manifold. The exhaust begins at 1-5/8"
Hooker headers
|> w/ 3" collectors and includes a crossover pipe. The dual exhaust is
2-1/4" and
|> uses high flow mufflers.
|> The TH350 is driven by the stock 1200-1800 stall torque converter.
The governor
|> is adjusted to provide WOT shifts at 5000 rpm. The power is
transmitted to the
|> wheels through a GM-posi 10-bolt 3.07 differential. Traction is provided by
|> Goodyear ST P235R15 radials. Track times indicate an extreemly
sluggish 60 foot
|> times in the 2 second range, 0-60mph is acheived in ~6.1 & 1/4 mile
at ~14.5 secs.
|>
|> I would like to push the 0-60 time down into the high five second range and
|> hopefully reduce the 1/4 mile time into the low 14's is this possible or am
|> I about at the maximum for a "street" configuration.
|>
|> I still have the original 800 cfm Q-jet on the shelf in working
order, it doesnt
|> get as good gas mileage as the Holley (currently 14mpg city/ 18
highway) but I
|> was wondering if the larger flow capacity would boost power? What
about intake
|> manifold? Are there any that give good low rpm torque but allow
better high rpm
|> breathing? Is there any evidence that synthetic motor oils can
provide a small
|> increase in mechanical efficiency?
|>
|> Any experience or suggestions appreciated
|>
|> Thanks,
|>
|> Ericy

        -m-------  Randy Rosenberg                  [e-mail]
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