DrFishbone
SCCoA Member
I ended up with a complete set of aluminum supercharger and jackshaft OD pulleys: 5%SC, 5%JS, 10%SC, & 10%JS. Up until this point, I have only used the 5%JS & 5%SC pulleys, but want to bump the overdrive up to 15% to see what the ACT's look like with my setup, and if that goes well, try 20% total overdrive. (By the way - this is a Magnuson S-port, with about 15-16psi max boost on my engine w/10% OD).
My initial thoughts are that if my IC is doing it's job well, the 15% may let me keep the timing curve I have, or possibly even add some (I've not found how much advance my car can take just yet, but in general, ACT's stay right around 100F at WOT, max RPM). But, the 20% may make the temps too high. I remember reading a great thread by Fraser awhile back where he did some testing on this very topic, but can't see to find (or remember ) the exact parameters of his setup....anyhow, I'm going to to some testing on my own.
Anyone care to speculate what the results will be? I will have an 1/8mi track to play on while trying to find the best balance between pressure and temps - hopefully sometime in the next week or two...only bad thing is the weather...it's been hovering around 95F recently. I guess that basically means that I'll be able to get a little better results when racing weather is back - huh?
My initial thoughts are that if my IC is doing it's job well, the 15% may let me keep the timing curve I have, or possibly even add some (I've not found how much advance my car can take just yet, but in general, ACT's stay right around 100F at WOT, max RPM). But, the 20% may make the temps too high. I remember reading a great thread by Fraser awhile back where he did some testing on this very topic, but can't see to find (or remember ) the exact parameters of his setup....anyhow, I'm going to to some testing on my own.
Anyone care to speculate what the results will be? I will have an 1/8mi track to play on while trying to find the best balance between pressure and temps - hopefully sometime in the next week or two...only bad thing is the weather...it's been hovering around 95F recently. I guess that basically means that I'll be able to get a little better results when racing weather is back - huh?
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