MTI R1, Thinking about a change.....
05-12-2007, 10:18 AM
#1
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MTI R1, Thinking about a change..... I currently have a MTI R1 (232/236, .575/.578, 114). It was in the car when I bought it, and now I am thinking about a change. I was wondering if anybody has any info about whos lobes are used and if it would be worth it to switch to somthing like a 231/237 Speed Inc cam or similar. I dont want to go much bigger if at all, but I think this cam is leaving a lot on the table.
Looking for any first hand experience or people who have made the switch to or from. I did a search and didnt find much.
Looking for any first hand experience or people who have made the switch to or from. I did a search and didnt find much.
05-13-2007, 09:24 AM
#3
The R1 uses old school lobes that give lots of duration at .006". If you went with a Comp XFI, XE-R or LSK lobe, you could run a much bigger cam at .050" and have the same duration at .006" or you could run the same duration at .050" and have lots less duration at .006", giving you smoother street manners.
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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.
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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.
05-13-2007, 09:54 AM
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That is mainly what I was thinking about. For being a medium sized cam it acts a lot bigger at idle and leaves a little to be desired up top. Any recommendations? I dont really mind the street manners it has if it made more power, it is rarely driven to work anyway.
05-13-2007, 12:00 PM
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R1 I've had this cam for a couple of years. For some reason, my combo is a turd. It made 384/375 with heads and all the bolt ons. I don't blame the cam...yet. I'm changing some things around soon and hopefully will find my missing HP.
By todays standards, the lobe technology is not the best, but the relatively lower lift is easier on springs. My 373's leave a pretty big flat spot if you launch lower than 4500rpms. It only trapped 115. If I could do it again, I'd go with a cam and combo that has been proven and a no brainer. It sounds good, though. It'll still scare old ladies, children and pets. Have you dyno'd or run the car at the track? Have you had a similar experience?
By todays standards, the lobe technology is not the best, but the relatively lower lift is easier on springs. My 373's leave a pretty big flat spot if you launch lower than 4500rpms. It only trapped 115. If I could do it again, I'd go with a cam and combo that has been proven and a no brainer. It sounds good, though. It'll still scare old ladies, children and pets. Have you dyno'd or run the car at the track? Have you had a similar experience?
Last edited by Steve Gunn; 05-13-2007 at 12:15 PM.
05-13-2007, 02:58 PM
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Originally Posted by Steve Gunn
Have you dyno'd or run the car at the track? Have you had a similar experience?
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09-01-2007, 01:34 AM
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03-22-2008, 10:34 PM
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O and the lobe seperation angle might have something to do with that, I dont know much but generally cams with make more power with a tighter lsa, which equates to more valve overlap, if Im not mistaken, im sure someone will correct me if im wrong.
