Magnacharger Radix Q
09-07-2004, 12:42 PM
#11
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Another thing is timing. I was getting a little more KR with the 2.75". My stock CR was 10:1, but even with my ported heads pulling it down to about 9.6:1, I still got a little more. With the 2.9" I was able to run with no KR up top and 2 degrees more timing.
I think to find the right combo, you need to have both pulleys. Make runs at the track with adjustments to tunes in between and find out what works best.
I think to find the right combo, you need to have both pulleys. Make runs at the track with adjustments to tunes in between and find out what works best.
09-07-2004, 12:50 PM
#12
Originally Posted by BenKey
Another thing is timing. I was getting a little more KR with the 2.75". My stock CR was 10:1, but even with my ported heads pulling it down to about 9.6:1, I still got a little more. With the 2.9" I was able to run with no KR up top and 2 degrees more timing.
I think to find the right combo, you need to have both pulleys. Make runs at the track with adjustments to tunes in between and find out what works best.
I think to find the right combo, you need to have both pulleys. Make runs at the track with adjustments to tunes in between and find out what works best.
I'd like to get a 2.9 and a 2.7 (2.75 if 2.7 not available).
09-07-2004, 12:55 PM
#13
Originally Posted by BenKey
Well....any way you can lower the intake temps, you'll gain. I didn't have a good warm and fuzzy about spinning the crap out of the blower and really wanted it to last. I have heard that it can handle a little higher than what I was doing. The 2.9" pulley will drop the blower rpms down about 1k rpms. I believe even with enhanced cooling, the differences in a 2.75" and a 2.9" pulley will be negligible.
do you think you could have gained more hp had you been able to control the heat with the 2.75? hypothetically of course, or do you feel otherwise?
09-07-2004, 12:59 PM
#14
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Yes, you could gain. But like I said, the diff btwn 2.75" and 2.9" in boost was only about 3/4 of a pound of boost. I have digital gauge, so it was easy to see it.
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