Which combo would make more power

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Feb 28, 2001 | 08:19 PM

98_1LE

Thread Starter

Member

Joined: May 2000

Posts: 389

Likes: 18

Which combo would make more power

Help... I still haven't decided what combo to use on the 'Bird.

Both are on an '87 L98.

Common parts
SLP 1.75" headers
SLP 2OTL catback
SLP cold air
1.5 roller rockers
ZZ4 cam
Accel, AS&M or SLP runners
Hypertech Thermomaster

1)
Aluminum L98 heads
Accel intake base

2)
Vortec heads
SDPC TPI/Vortec base (when released)

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87 Formula 350 13.94@96.67
98 Z28 1LE 13.15@107.59
1LE Owners Association

Feb 28, 2001 | 09:17 PM

The ODB

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Joined: Jan 2001

Posts: 1,429

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From: Belleville, IL USA

maybe a close call.

I go with #1

ODB

Feb 28, 2001 | 10:08 PM

Scott 88 GTA

Member

Joined: Jul 1999

Posts: 407

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From: Stuarts Draft, VA

Car: 88 GTA

Engine: modified L98

Transmission: 700r4

Axle/Gears: 3.27 9-bolt

Depends on if you're planning on porting the L98 heads, or just switching to the aluminum ones.

Vortec vs. unported L98 --> Vortec wins

Vortec vs. ported L98 ----> close call (I really wouldn't know which one to reccomend)

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Black 88 GTA L98
261 RWHP, 345 RWTQ
ZZ4 bottom end, Edelbrock 6085 heads, LT4 HOT cam, GMPP 1.6 RR's, ported stock TPI, SLP 1 3/4" headers, no cat, Dynomax cat-back, Stock PROM
E.T.F.A Member #11

Mar 1, 2001 | 12:44 AM

black5.7GTA

Member

Joined: Aug 2000

Posts: 315

Likes: 1

From: Tampa,FL,U.S.

1.and ditch the Hypertech and get a custon one made from www.fastchip.com

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1990 Trans Am GTA
Black/Black leather
350 auto 3.23 dual cats
SLP package
SLP torque converter
SLP shift kit
Fastchip PROM
245/50/16 GSC's

G-Tech
0-60 5.1 1/4mile 13.6@104

Previous thirdgen
1986 Camaro IROC-Z
PearlGreen/Gray
305 TPI
15.1@93