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Old 02-29-2012, 02:11 AM   #1
Junior Member
Member Since: Feb 2012
Default 1985 L98 Stock motor upgrades?

This is a repost of another question I asked but I'm putting in more specifics. I have a 85 L98 corvette, stock motor, with straight pipe exhaust. I wanted to upgrade the motor by putting on a few thinks, a new intake system, runners, throttle body, and chip. I don't want to do anything extreme like cams or anything where I have to take out the motor and take off a bunch of things because I don't have the experience or money. So saying that, what are your thoughts? Anything other simple upgrades to get some more HP?
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Old 02-29-2012, 02:13 AM   #2
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Sorry about the typos
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Old 02-29-2012, 04:29 PM   #3
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Member Since: Aug 2009
Location: Melbourne, Australia Victoria

Cold air intake cut your air filter lid restriction, fit headers and an adjustable fuel pressure regulator is the way to go
When i first got my 85 it ran mid 14.5 sec quarters i put the headers on and set the fuel pressure from std 30 psi to 40 psi, put a cold air intake filter on plugs leads and tune. went back to the track and did a 13.4 sec quarter,all else stock.

The headers are your biggest bang for the buck
I highly recommend bosch 111 injectors.
The vette is now supercharged and a lot quicker but those were my first steps, you do not want to loose that low down torque fitting too big a camshaft that is for sure!.
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Old 02-29-2012, 07:07 PM   #4
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St. Jude Donor '05
Member Since: Oct 2004
Location: Valencia Ca.

Skipe the chip and throttle body unless you just like spending money
Once the exhaust is done go after the intake next.
Some like adding springs and 1.6 rockers
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Old 02-29-2012, 09:25 PM   #5
John A. Marker
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Member Since: Mar 2004
Location: Dublin CA

I would suggest that you read Forum member Vader86's web site. There is lots of information there for you.

Forget the chip
1995 LT1 6 speed - stock.
SOLD to son ** 1985 Coup -ZZ4 balanced, LPE 74211 , AFR 180 heads, SuperRam base, runners & plenum, cut out air box, K & N , power coupler, 52MM TB, March pulleys, AFPR, Accel injectors, Walbro FP, 1.6 RR, chip by TJWONG, 160 stat, cut back plugs, 8.5MM MSD wires, custom camber-brace,TRANSGO shift kit, 2400 stall converter, cross drilled rotors, SS brake lines, VBP camber rods, IAS Edelbrock shocks, exhaust, Magnflow cat, 3.07 gears, 13.2 @107.2 MPH in 1/4
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Old 02-29-2012, 09:25 PM
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