Will a cam add/decrease rasp?
Thread Starter
Teching In
Joined: Nov 2004
Posts: 49
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From: TX
Will a cam add/decrease rasp? Exhaust Mods: Pacesetter LT's, TSP ORY, Magnaflow Catback
I have a HORRIBLE rasp between 2k and 3k rpm. Only at partial throttle, so normal driving around its always there. Sounds alot like a trumpet or horn. Other than that I love this set up.
My question is I'm about to install a cam along the lines of 224/224 .581 .581 112lsa. Will the rasp still be same? Will it be moved in the rpm? Will it go away?
I dont want to go cutting up the I pipe if i dont have to.
I have a HORRIBLE rasp between 2k and 3k rpm. Only at partial throttle, so normal driving around its always there. Sounds alot like a trumpet or horn. Other than that I love this set up.
My question is I'm about to install a cam along the lines of 224/224 .581 .581 112lsa. Will the rasp still be same? Will it be moved in the rpm? Will it go away?
I dont want to go cutting up the I pipe if i dont have to.
[QUOTE=SY KB 4.7L]Exhaust Mods: Pacesetter LT's, TSP ORY, Magnaflow Catback
I have the same setup as you except Pace y instead of TSP and I don't notice any rasp like you describe. The cam will make it sound badass though I can tell you that much. I remember it was a bit quieter and not near as deep before I put the cam in.
I have the same setup as you except Pace y instead of TSP and I don't notice any rasp like you describe. The cam will make it sound badass though I can tell you that much. I remember it was a bit quieter and not near as deep before I put the cam in.
i get the same thing but only at half throttle. and im never half throttle im either 1/4 or wot 
sounds like a helichopper taking off. If i keep my car im gonna have a side exit true dual fabbed up at mufflex maybe.
sounds like a helichopper taking off. If i keep my car im gonna have a side exit true dual fabbed up at mufflex maybe. 
Rasp will be worse with the cam because of increased overlap and increase cylinder filling. Sorry if that bursts your bubble. 
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
