Fastest ET's with a TPI 305?
12-06-2006, 11:52 AM
#51
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Car: '87 Camaro IROC-Z
Engine: 385 HSR
Transmission: 700R4
Axle/Gears: 3.42 posi
I ran a 14.87 @ 90.95 mph on my original 305 (peanut cam) with a ported plenum, Hooker 2055 headers, cat-back exhaust, 2200 stall converter, 3.42 gears/posi, and burning my own chip. I didn't have an air pump or cat, but did have the A/C hooked up and running (not at the track of course). 
Last edited by GregWestphal; 12-06-2006 at 11:54 AM. Reason: add more info
12-06-2006, 12:00 PM
#52
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Car: 91 camaro z28
Engine: 383 with all holley performance
Transmission: 700r4 built for race
Axle/Gears: 3.73 limited slip
i ran 13.80 with my 305 (headers,intake,spark pluhs cables,exhaust,-
and a brand new 3.45 gears.)
and a brand new 3.45 gears.)
12-06-2006, 01:00 PM
#53
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Car: 1989 IROC-Z
Engine: 5.7L EFI LTR setup
Transmission: T-5 World Class
15.1 @93 mph , with 227'000 km's on a hot day about 1000 ft above sea level. With MAJOR blow by. ( kicked off track for spewing oil out the dipstick) .
Forgot to add it was a 5 speed with 3.08 LSD
Forgot to add it was a 5 speed with 3.08 LSD
Last edited by D's89IROCZ; 12-06-2006 at 01:03 PM.
12-06-2006, 01:52 PM
#54
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Car: 86 IROC-Z, 98 Z28
Engine: 370 LSx, LS1
Transmission: T56's
Axle/Gears: 3.73, 3.42
Wow. To me that time seems really good with just those mods. I guess i should get a set of 3.45's?
Heres my best time with the IROC.
86 Iroc-Z LB9 Auto.
Stock, except for K&N's, a flowmaster muffler, and 3in cutout
1/8th Mile
9.87 @ 70.09 MPH w/2.16 60'
Last edited by Rich92 RS; 12-06-2006 at 02:13 PM.
12-06-2006, 04:22 PM
#55
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Car: I've had 4 thrid gens!!
Engine: Someday again I will have another!!
That's pretty fast. No porting, heads, or cam? What were you getting for 60' times? All stock suspension/drag radials? That 5pd and 3.45 gears must make the difference. -Nick.
12-06-2006, 04:33 PM
#57
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Car: I've had 4 thrid gens!!
Engine: Someday again I will have another!!
12-06-2006, 05:03 PM
#58
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12-06-2006, 09:55 PM
#59
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Car: 91 GTA & 92 GTA & 92 GTA
Engine: 305 TPI & 350 TPI & 350 TPI
Transmission: 700R4
Axle/Gears: 3.42 & 3.23 & 3.23
I bought a 92 GTA 350 TPI from California in September that I am in the process of fixing up and I am going to do a few mods to it too. Right now it is bone stock, it even has a paper air filter.
12-07-2006, 12:13 PM
#60
Andy
That sounds good, get the biggest cat you can fit on there (make sure its a high flow one), i have 3" exhaust starting with/from the Cat going to the big Borla muffler. The 305 engine is also very sensitive to timing. With the timing at around 0 deg base, i was running 16.8 in the quarter, and bumping it up to 10 deg base at the track, i dropped it down to 16.2.
Good luck with the GTA
That sounds good, get the biggest cat you can fit on there (make sure its a high flow one), i have 3" exhaust starting with/from the Cat going to the big Borla muffler. The 305 engine is also very sensitive to timing. With the timing at around 0 deg base, i was running 16.8 in the quarter, and bumping it up to 10 deg base at the track, i dropped it down to 16.2.
Good luck with the GTA
12-09-2006, 06:46 PM
#63
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Car: 1987 LB9 IROC-Z
Engine: stock 305
Transmission: stock 700-R4
Axle/Gears: 3.23
my '87 LB9 iroc runs 15.5 @88.2. i have managed a 2.16 '60 foot time, hooks up good but doesnt pull hard. all i have done to it is a TPIS airfoil and a GMS adjustable MAF sensor.
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