, HA me too.
Cam Help! !
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Race Director
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From: San Antonio Texas
St. Jude Donor '05-'06-'08
Cam Help! !
Ok guys, I currently have a 224-581/228-589 115 on my383 with a D1SC making about 13 Lbs. of Boost, I have a friend of mine selling me a 231-580/239-595 114...........My question is, will I see a big improvement or will I be pushing it! ! ! !
Melting Slicks
Joined: Sep 2005
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From: eagle mountain utah
Blowers like wide lobe seperation angles. Your friends cam with 114* may have so much overlap that it will cause a drop in boost and extra unburned charge in the exhaust that can overheat the cats, if you have theml. If your set up is rich in wot like it should be, then when a little extra air meets up with the cats while they are rich under wot, you may shorten their life. But it will have a nice idle...
Safety Car
Joined: May 2002
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From: waterloo ontario
St. Jude Donor '08
Blowers like wide lobe seperation angles. Your friends cam with 114* may have so much overlap that it will cause a drop in boost and extra unburned charge in the exhaust that can overheat the cats, if you have theml. If your set up is rich in wot like it should be, then when a little extra air meets up with the cats while they are rich under wot, you may shorten their life. But it will have a nice idle...
Mike-what's your CR?
Life Time NCM #2196
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From: Converse TX
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Safety Car
Joined: May 2002
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From: waterloo ontario
St. Jude Donor '08
Actually I was just discussing that with my engine builder today. Were just putting on the finishing touches on a new cam that should rev to 7500-7800 rpm hydraulic roller. It will consist of a cam with lobes that are not what everyone expects, special pushrods and a custom spring package. Just imagine what an extra 1000 rpm would do? You could run a biigger pulley and get more wrap with less chance of slip!
Say for example if we worked something out for Mike's car-right now with the 3.6 pulley at 6800 he's spinning the blower at 58 083-if he has a 7.5 crank pulley-now spin the motor to 7800-that's 66 625 blower rpm.
I'll have the parts soon-they take some time to order but if it all pans out-everyone will benefit!
Say for example if we worked something out for Mike's car-right now with the 3.6 pulley at 6800 he's spinning the blower at 58 083-if he has a 7.5 crank pulley-now spin the motor to 7800-that's 66 625 blower rpm.
I'll have the parts soon-they take some time to order but if it all pans out-everyone will benefit!
Safety Car
Joined: May 2002
Posts: 3,615
Likes: 2
From: waterloo ontario
St. Jude Donor '08
Le Mans Master
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From: Port Arthur, Texas 77642
C6Dude (Perry) has a video with a 7600rpm blip (massive tire spin) on a 402 that is just insane 
Life Time NCM #2196
Joined: Sep 2004
Posts: 82,572
Likes: 1,682
From: Converse TX
Actually I was just discussing that with my engine builder today. Were just putting on the finishing touches on a new cam that should rev to 7500-7800 rpm hydraulic roller. It will consist of a cam with lobes that are not what everyone expects, special pushrods and a custom spring package. Just imagine what an extra 1000 rpm would do? You could run a biigger pulley and get more wrap with less chance of slip!
Say for example if we worked something out for Mike's car-right now with the 3.6 pulley at 6800 he's spinning the blower at 58 083-if he has a 7.5 crank pulley-now spin the motor to 7800-that's 66 625 blower rpm.
I'll have the parts soon-they take some time to order but if it all pans out-everyone will benefit!
Say for example if we worked something out for Mike's car-right now with the 3.6 pulley at 6800 he's spinning the blower at 58 083-if he has a 7.5 crank pulley-now spin the motor to 7800-that's 66 625 blower rpm.
I'll have the parts soon-they take some time to order but if it all pans out-everyone will benefit!
Safety Car
Joined: May 2002
Posts: 3,615
Likes: 2
From: waterloo ontario
St. Jude Donor '08
Hopefully we can find a drop-in spring (1.27) that has enough seat pressure-if not machining the heads is just not feasable for everyone-nor do I want to do.
That's not all-then we need to find a pushrod that will fit without machining.
Then to make things worse-the right duration to be able to spin that hi but still be tuneable.
I spent all day on the phone trying to put these parts of the puzzle together-hopefully I'll have some answers this week!
Le Mans Master
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From: AKA Harvey Mushman-I know just enough to be dangerous "Those who sacrifice liberty for safety deserve neither"- B. Franklin
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Le Mans Master
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From: AKA Harvey Mushman-I know just enough to be dangerous "Those who sacrifice liberty for safety deserve neither"- B. Franklin
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Le Mans Master
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From: Port Arthur, Texas 77642
Here's a link to Perry's web page with videos, I did not remember which vid it was on a thread starter with "7600rpm blast", but if you look through them I'm sure you'll be entertained
http://www.dpecorvettes.com/Download.html
http://www.dpecorvettes.com/Download.html
Thread Starter
Race Director
Joined: Jan 2003
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From: San Antonio Texas
St. Jude Donor '05-'06-'08
Le Mans Master
Joined: Dec 2005
Posts: 8,475
Likes: 332
From: Port Arthur, Texas 77642