so you want a vvt cam swap?!?!
08-01-2012, 06:00 PM
#31
After messing a TON with tuning VVT there is more than one way to skin that cat.
In the end we tuned it with zero'd out VVT as if were a normal cam. Then added in our latest phase profile ( ive had 20 in there at least ) and as of now i still need to get it on the dyno so we can see whats working and whats not but it sure runs good. Been driving it every single nice day we've had all year.
Roasted the **** out of an SLS with only 2 gears hehehee
In the end we tuned it with zero'd out VVT as if were a normal cam. Then added in our latest phase profile ( ive had 20 in there at least ) and as of now i still need to get it on the dyno so we can see whats working and whats not but it sure runs good. Been driving it every single nice day we've had all year.
Roasted the **** out of an SLS with only 2 gears hehehee
If I cam mine, it WILL be a VVT cam. In any performance application, I have no love for AFM, but there is a guy here getting some amazing mileage numbers with a well-tuned 5.3 CCSB by taking advantage of the AFM tables. Once again, that would be for a truck as a daily driver and not so much for maximum performance. I'm glad my L9H doesn't have AFM.
08-01-2012, 06:13 PM
#32
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Yeah, he had 22s or 24s on lower-profiled tires, lowered CCSB 5.3 XFE. He also regeared to 3.90 (from 3.08) to allow the truck to maintain 4-cylinder mode more often. He was getting 22-24mpg highway last I checked. I do agree with you though that on a setup like ours, it isn't worth it.
08-02-2012, 10:37 AM
#33
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Ive been a fan of VVT since my first experience playing with cam timing on BBC's with the old Cloyes hex-ajust timing sets. Plus I had friends playing with cam timing on four bangers by moving the belt a notch or two etc. Ive seen the results and it might not be massive, but its def worthwhile. While I have no data to back this up yet id venture to say VVT will add more to most 6.2L builds than the FAST intake will so..... I see no reason not to use it.
BTW..... I like to "try" to break stuff before I call it good. Not deliberate breakage just good hard punishing driving so...
Ive had my 6.2L VVT cam t56 swap to *gulp* 7500 RPM.... numerous times... and thats with stock L92 valves, 1518 beehives, and stock steel retainers too
EPS lobes valvetrain stability is what they are designed for and all I can say is they are STABLE!
BTW..... I like to "try" to break stuff before I call it good. Not deliberate breakage just good hard punishing driving so...
Ive had my 6.2L VVT cam t56 swap to *gulp* 7500 RPM.... numerous times... and thats with stock L92 valves, 1518 beehives, and stock steel retainers too
EPS lobes valvetrain stability is what they are designed for and all I can say is they are STABLE!
08-03-2012, 06:40 AM
#34
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Well my new custom cam came in last night. I only had an hour of daylight work on it so I will be probably having installed by tomorrow morning. Currently installed cam is way too big duration wise for my engine according to desktop dyno. I know it's only a reference tool but the numbers on currently installed cam definitely match the old butt dyno. I'm still not sure if it's a 156 or a 189 core I'll have to do some more investigation when the old cam comes out so I can sell it. I think it would be a good tq or towing cam for 6 L guy. With the exact same motor specs other then the lift and the valve events with the new cam looks to be an amazing improvement in bottom end.
Currently installed cam
http://www.flickr.com/photos/73086763@N03/7704377166/http://www.flickr.com/photos/73086763@N03/7704377166/ by http://www.flickr.com/people/73086763@N03/, on Flickr
New custom grind cam
http://www.flickr.com/photos/73086763@N03/7704355116/http://www.flickr.com/photos/73086763@N03/7704355116/ by http://www.flickr.com/people/73086763@N03/, on Flickr
BTW I only have access to desktop Dyno 2000 so if anyone has a newer version and wants to see if it changes when actually entering for an LS engine vs just changing bore/ stroke on a Gen 1 that would be awesome. As mentioned before this just shows a overall increase for performance on this sized engine.
Currently installed cam
http://www.flickr.com/photos/73086763@N03/7704377166/http://www.flickr.com/photos/73086763@N03/7704377166/ by http://www.flickr.com/people/73086763@N03/, on Flickr
New custom grind cam
http://www.flickr.com/photos/73086763@N03/7704355116/http://www.flickr.com/photos/73086763@N03/7704355116/ by http://www.flickr.com/people/73086763@N03/, on Flickr
BTW I only have access to desktop Dyno 2000 so if anyone has a newer version and wants to see if it changes when actually entering for an LS engine vs just changing bore/ stroke on a Gen 1 that would be awesome. As mentioned before this just shows a overall increase for performance on this sized engine.
Last edited by Gus 82; 08-03-2012 at 10:37 AM.
08-12-2012, 08:17 AM
#35
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New cam is in and just waiting for PCM to return from Nelson, compared cam that came out and stock came. Pin to lobe center appears to be the same so It should be a 189 and just to much for my little engine. To the for sale section it goes
08-14-2012, 06:49 AM
#37
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the first one is 219/228 112, second is 210/224 112, these are @.050 but the valve events on the cam cards that were entered really seemed to be the difference where the torque comes in.
