should i switch from 3.33 to 3.12 on my strim?

blown5.0 · 01-29-2001, 10:22 PM

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Would switching from a 3.33 pulley to a 3.12 pulley result in better times on street tires or just more wheelspin? Which would you recommend. PLease bear in mind that i have a stock block with full exhaust.

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1990 GT
Vortech S-trim 10-12psi 373s, fms upper and lower control arms
hurst shifter, mac offroad h pipe, warlock
catback exhaust,c&l 73mm mass air, 30lb injectors, mac unequal length headers,trex inline pump, msd btm

jonnyk · 01-30-2001, 01:12 AM

A smaller pulley will result in more boost, and ultimately more power. However you also have to account for tuning (whether or not you're on pump gas, more boost might not settle well with it, you could have detonation problems), and you'll need more fuel delivery also. I'm not sure that a T-Rex alone with a stock pump would be adequate, but that would come down to adjusting the fuel pressure and making sure the pump can keep up. More power will also provide you with more traction issues, but will make your car quicker and faster if you can hook it up. As for how well your car hooks, you can generally guage it based on how it's doing now and see if you think more power will hurt traction a lot or not.

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1991 LX Hatch 5.0L

01-29-2001, 10:22 PM	#1
blown5.0 Registered Member Join Date: Jun 2000 Location: new york, ny Posts: 19	should i switch from 3.33 to 3.12 on my strim? -------------------------------------------------------------------------------- Would switching from a 3.33 pulley to a 3.12 pulley result in better times on street tires or just more wheelspin? Which would you recommend. PLease bear in mind that i have a stock block with full exhaust. ------------------ 1990 GT Vortech S-trim 10-12psi 373s, fms upper and lower control arms hurst shifter, mac offroad h pipe, warlock catback exhaust,c&l 73mm mass air, 30lb injectors, mac unequal length headers,trex inline pump, msd btm

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01-30-2001, 01:12 AM	#2
jonnyk Being stroked is great Join Date: Oct 1998 Location: Alberta, Canada Posts: 772	A smaller pulley will result in more boost, and ultimately more power. However you also have to account for tuning (whether or not you're on pump gas, more boost might not settle well with it, you could have detonation problems), and you'll need more fuel delivery also. I'm not sure that a T-Rex alone with a stock pump would be adequate, but that would come down to adjusting the fuel pressure and making sure the pump can keep up. More power will also provide you with more traction issues, but will make your car quicker and faster if you can hook it up. As for how well your car hooks, you can generally guage it based on how it's doing now and see if you think more power will hurt traction a lot or not. ------------------ 1991 LX Hatch 5.0L