Hi, has any one ever run there GTA or Iroc
\Z28 (radar run of course) and I'm mostly
interested in a bone stock L98, but the Lb9's
are welcome too! I've been told that they
will come close to 155 or so, but i could be
wrong. Later -GTA

 

Everything I have ever read on them best I can remember said the stock 350 GTA would run 141 mph and a stock 350 IROC would run 145 mph.
Have not had mine that fast myself so dont know for sure.

 

I dont know if u care about a 3.1 but i tried it in my 3.1 camaro and hit 125 with just a k&n air filter.

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92' camaro
New 305 block TPI conversion, Forged parts all around,Edelbrock intake,ported plennum,ported corvette alluminum heads, accel cam,52mm throttle bodie, SLP runners,ford SVO 19lb injectors,fuel regulator,cloys timing chain, comp alluminum roller rocker arms and pushrods MSD 8.5 mm wires, bosch plattinum plugs, hypertech cap & rotor and coil, Edelbrock TES headers, free flowing catalytic converter and a 3 inch force II flowmaster exhaust system.
Soon to come!!!
Procharger system 12lbs o boost.
Favorite quote: "where ever u go, there u are"

Other car;
1971 plymouth Duster
Mods:340,edelbrock victor jr. intake, 650 4 barrel holley, heddman headers,40 series dual flowmasters, cold air intake,4:10 gears, just got a new paint job and cragar rims with 315 tires in the back.
:Yeah its not a chevy but damn how many 71' dusters have u seen in the streets.

 

I know of a stock L98 (aluminum heads) 1989 Formula-350 that went 152mph.
This was in 1990.

 

I don't know how accurate the speedo was (car only had 11k on it), but somebody had my '89 L98 pegged against the trip reset button on the 145 mph speedo (figured it was going over 150).

Sparks a flyin'

[This message has been edited by sparks383iroc (edited February 26, 2001).]

 

An 87 I-ROCZ was run at 149mph in an old car and driver.

 

I'm confused. Do they shift into OD under WOT? Because if not my 3.27 car would run out of useable rpm before it went 140 mph ODB, did aluminum heads come stock on an F-body???

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

 

98_1LE,
Alum heads did not come stock on GTA's or IROC's.

Some IROC's and GTA's will shift into overdrive at full throttle. I have a 1987 350 GTA that came stock with 2.77 gears. That gears have been switched to 3.27 gears and it will shift into overdrive at 110 MPH.

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1988 Formula 5L/5sp 3.45 gears, SLP cold air kit, MAS gutted, TPIS air foil, TPIS AFPR, MAC headers, Mac under drive pulleys, MAC cat back, Relocated MAT.
Best ET street tires 13.85
Best 60 FT street tires 1.930
Best MPH street tires 99.29

 

i know that 140 comes pretty easy and with out too much effort in my car. I accidentaly hit 140 and did not realize i was going that fast. I was still accilerating pretty good too. but why the hell do you want to go that fast. It is scarry when you hit speeds like that.

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90 IROC l98
last season best corected 13.62 @102
mods
full exhaust, AFPR, pulley, jet stage 1 chip, billet servo, 52mm throttle body, slp runners and some 1.6 RR's and a few other little things.
243 RWHP and 342 RWTQ with hot engine and 90 octain fuel

 

yes a friend of mine that I worked with ordered his formula 350 with aluminum heads and dual cats.
It came with the heads but only a single cat. Then one of his heads cracked and when it was back at the dealer getting a new head they put on his dual cats. It would run mid 14's @98 without changing anything at all on it. Not too bad for back then.

ODB


[This message has been edited by The ODB (edited March 02, 2001).]