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Old 02-17-2009, 05:33 PM   #11
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i have a 3.25 pulley on my and I had no problems with that, why you run with 3.5 and you have problems with that?
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Old 02-17-2009, 05:38 PM   #12
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You scanning your car for KR Knock Retard? If your running with no other mods and a pulley that small you run a huge risk of chipping a piston. Also, for every degree of KR you have you loose about 5hp. With out know more about your car other then what you said, I would guess your getting 8+ degrees of KR and loosing a good 40hp. A stock engine with a 3.5" pulley and a light tune will get more HP then a stock engine with a 3.25" pulley
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Old 02-17-2009, 06:12 PM   #13
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Quote:
Originally Posted by gaetaboy View Post
i have a 3.25 pulley on my and I had no problems with that, why you run with 3.5 and you have problems with that?
lol good luck replacing your motor
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Old 02-17-2009, 06:15 PM   #14
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ops! you think with my ported supercharge and the exhaust is better i use a 3.4 pulley
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Old 02-17-2009, 06:20 PM   #15
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i changed the rocker arms/pushrods using the aluminum 1.8 ratio
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Old 02-17-2009, 06:25 PM   #16
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with my setup what size pulley you think is the best to use? I think you know more then me on this kind engine
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Old 02-17-2009, 08:13 PM   #17
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As I said in our PM, you need a scan gauge before you do anything else. I really don't want to see you blow the engine. Trust us on this. You will get more power with a larger pulley and no KR. I'm willing to bet money on the fact that you are loosing 40 or 50 hp right now.

With a ported SC, high lift rockers, a good set of headers, a free flow cat, and a good intake. Not to mention a good tune on the PCM you should be able to get to a 3.3", perhaps even your 3.25" But you MUST scan for KR.
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Old 02-17-2009, 08:58 PM   #18
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Rockers, ported charger and some type of exhaust mods. 3.2 is possible, however if you scan and look at timing there is a good chance you will note that your timing is much lower than it should be. I once has the go as small as you can pulley misconception. Through good info etc friends told me I was running on the low octane tables which is what the pcm reverts to when you have enough constant knock.

As you can assume low octane tables mean less timing, less power, less fuel mileage. Oddly enough going to a 3.4 or 3.5 if you have low timing or knock could gain you more timing, more power and better mileage while using less power from the motor to turn the bigger pulley. Sounds like you are willing to listen from those that blew up motors before you.
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Old 02-17-2009, 09:02 PM   #19
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Hey now, I haven't blown up one of these, yet.
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Old 02-17-2009, 09:11 PM   #20
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Psst Dan.. on topic dude.

Give it time, once your trans is fresh your motor will actually be able to work
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