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- Newsgroups: rec.autos.tech
- Path: sparky!uunet!cs.utexas.edu!hermes.chpc.utexas.edu!news.utdallas.edu!corpgate!crchh327!crchh435!ericy
- From: (Eric Youngblood)
- Subject: Increasing power?
- Message-ID: <1992Jul24.133816.20347@bnr.ca>
- Sender: news@bnr.ca (News on crchh327)
- Nntp-Posting-Host: crchh435
- Reply-To: Peon w/o Email priv (Eric Youngblood)
- Organization: Bell-Northern Research, Richardson, Tx
- Date: Fri, 24 Jul 1992 13:38:16 GMT
- Lines: 36
-
-
- 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
-