Fastcamaro87

anyone know what size the throttle bores are on a LT1 T/B?

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87 IROC-z 305 TPI
Borg Warner T-5 fresh rebuild
10-bolt 3.73 Richmond gears rebuilt GM posi,
formerly BW 9-bolt w/3.45 gears(broke it)
Ported Plenum and Runners Homemade AFPR
ACCEL 8.8 wires, High output coil,and cap & rotor
Bosch platinum + 4 plugs
Ram Air w/ K&N filters,
MAF sensor screens removed, TB coolant bypass
Polyurethane tranny and torque arm mounts
Dynomax catback w/custom tips
K&N oil filter,Mobil 1 synth, Futura GLS Super Sport tires 265/50/15 rear and 235/60/15 front mounted on 86 monte carlo SS rims ,

400 sbc and a 6 spd in the works

Fastcamaro87

anyone??

Ed Maher

I think they're 48mm just like us. IIRC you cannot use an LT1 TB on any TPI b/c of something or other, i forget, lol, do a search, hehehe

Fastcamaro87

thanks ED from what i have heard so far they are 48mm which also leads me to beleive that my 305 TPI should be fine because there are LT1`s doin great with a 48mm

------------------
87 IROC-z 305 TPI
Borg Warner T-5 fresh rebuild
10-bolt 3.73 Richmond gears rebuilt GM posi,
formerly BW 9-bolt w/3.45 gears(broke it)
Ported Plenum and Runners Homemade AFPR
ACCEL 8.8 wires, High output coil,and cap & rotor
Bosch platinum + 4 plugs
Ram Air w/ K&N filters,
MAF sensor screens removed, TB coolant bypass
Polyurethane tranny and torque arm mounts
Dynomax catback w/custom tips
K&N oil filter,Mobil 1 synth, Futura GLS Super Sport tires 265/50/15 rear and 235/60/15 front mounted on 86 monte carlo SS rims ,

400 sbc and a 6 spd in the works

Ed Maher

Oh yeah man, you don't realistically need to start thinking of TBs till you're in the 12s, or at least real low 13s. The only reason you see so many slow cars with TBs is cuz it's one of those easy to do mods that somebody who wants to blow money goes for so they don't have to get dirty doing a cam swap, etc.