What would you expect an 88-90 L98 IROC to run in the 1/4 with these minor mods?

BBK Billet Aliminum Pulley's
TPS Throttle Body Airfoil
Edelbrock Street Legal Headers
Flowmaster 3" Cat Back

 

First off,an 89 should be a little faster than an 88 because of the dual cats,and a 90 is slightly faster then an 89 because of higher compression and speeddensity.88-90 350 IROCS with 3.27 or 3.23 gears are capable of running mid-low 14's,and those mods could knock off .3-.5.

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1990 Trans Am GTA,Black/Black Leather,350,auto 3.23,Dual Cats,
SLP Package,Fastchip,GSC's,Brand New Trans with Corvette 2400 stall,Servo/Shift Kit
G-tech 1/4mile(before trans and roasting 1st)1/4mile 13.6@104,now probably 13.2@track with traction/good conditions
stock(track)14.3@96
member www.transamgta.com
Previous Thirdgen
1986 Camaro IROC-Z

 

Highly doubt with those mods you will see 13's. Best you'll see with those mods alone depending on the condition of the engine will probably be 14.1-14.2 in the 1/4. If you get a 2.0 or less 60 foot possibly 14.0.

 

14.3 is the best you will see, i ported my plenum and did most of the mods you have, and i only got to a 14.1 and but now i am into 13.8 and i am spinning throught the 60' so, my best bet would be to find out the real way, take a friday night and run to the nearest strip and run it two or three times, but make sure it cools down once you get there you will run so much better if it does.

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Jarrad
1990 IROC-Z L98 350 TPI
TH-700R4
G92- 9 Bolt Borg-Warner 3.27gears
Bright Red Hardtop/ Grey Interior


DAILY DRIVER: 1991 GREY S10 2.5L/5SPD -FOR SALE.

 

with my 89 350, new stock engine with 9K miles, shorty headers, dual cats, flowmaster exaust, home made ram air, air foil, lightly ported plenum, and 2.77 gears i ran 14.01@98mph the other night.