Will advancing my MS3 4 degrees decrease PTV clearance??
Will advancing my MS3 4 degrees decrease PTV clearance?? Instead of swapping cams, I decided to advance the MS3 +4 degrees, to bring the powerband down a bit and pick up some torque down low...the results of this advance were VERY close to that of a G5X1 swap, which is my other cam...
Will this decrease PTV or leave it the same?
I have PRC 5.3 heads, unmilled, stage 2.5, 62.5 cc chambers. 2.02/1.575 valves
Thanks!
Erik
Will this decrease PTV or leave it the same?
I have PRC 5.3 heads, unmilled, stage 2.5, 62.5 cc chambers. 2.02/1.575 valves
Thanks!
Erik
You will open the intake valve 4 degrees earlier which will give you potential piston to valve contact if you don't have flycut pistons. If you have flycut pistons, then this is a good move for picking up the mid-range. 
__________________
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.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
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From: BFE
Originally Posted by erikthegoalie
Hey fellas...
Thanks for the input..My LSA on the MS3 is 113, no advance...
Pred, how can I find the ICL of the cam, sorry for my lack of ICL knowledge lol
Erik
Thanks for the input..My LSA on the MS3 is 113, no advance...
Pred, how can I find the ICL of the cam, sorry for my lack of ICL knowledge lol
Erik
ICL = LSA- Advance in grind
If cam retarded (like 113-2)
then ICL is 113 - (-2) = 115 ICL
I think that Texas Speed will typically grind 2 degrees of advance in that cam, but the only way to know for sure is to degree it. With no advance (113ICL), the intake valve closing point would be 51.5 degrees ABDC at .050. That's very late for a 346. With 2 degrees advance, it would be 49.5 and at 4 degrees, it would be 47.5. For whatever it's worth, the intake valve closing point on my engine is 48 degrees ABDC at .050".
__________________
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.
Originally Posted by PREDATOR-Z
113 no advance means 113+0 or 113LSA/113ICL
ICL = LSA- Advance in grind
If cam retarded (like 113-2)
then ICL is 113 - (-2) = 115 ICL
ICL = LSA- Advance in grind
If cam retarded (like 113-2)
then ICL is 113 - (-2) = 115 ICL
Originally Posted by Patrick G
I think that Texas Speed will typically grind 2 degrees of advance in that cam, but the only way to know for sure is to degree it. With no advance (113ICL), the intake valve closing point would be 51.5 degrees ABDC at .050. That's very late for a 346. With 2 degrees advance, it would be 49.5 and at 4 degrees, it would be 47.5. For whatever it's worth, the intake valve closing point on my engine is 48 degrees ABDC at .050".
In the process, the cam card was lost...I really do not know if any advance if ground into the cam from TSP, I simply bought it and asked for the 113 LSA...
The only way to know now is to degree it?
If it did have 2 degrees advance out of the box, wouldn't another +4 degrees then leave me with +6 degrees advance? I wouldn't think that would be very good...
Hmm, I am stuck....
What is my next step at this point?
Erik
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Originally Posted by ls2 bait
just put the lg cam in straight up.
__________________
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.
Originally Posted by Patrick G
That's an interesting statement as most LG cams are ground +4. Putting them in straight up would require you retarding them 4 degrees. If what you meant by straight up was line up the dots and install it with no advance or retard, then I would agree with you. The LG cams have very nice valve events as they come.
TECH Resident
Joined: Jan 2003
Posts: 855
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From: AUSTIN TX
Keep searching Erik, I believe this topic was covered a while back in another post (if I remember correctly it was regarding a MS4 and the difference was minimal). It would be nice to know what kind of advance these are typically ground with and if the MS4 are ground with the same advance. Why don't you call Jason at TSP and ask him how it would have been ground had you just ordered it without any special instructions. He should be able to answer that. I would not fret loosing the cam card much, another guy on here ordered one +2, got the cam card which said +2 and it ended up being +4.
Looks like Ill swap the cam, I cannot run the risk of losing even MORE PTV, and the torque I will pick up with the LG cam will be SICK down low....I did the math with the owner of the shop I work at and we calculated that I would gain about 30 ft pounds in the lower range of the power band...while HP loss up top would be minimal but will occur...big deal, I will take power under the curve any day over top end!
The next step is a 100 shot on the LG cam...NICE
Thanks guys for the heads up...
Also, I plan on building a bigger cubed motor in the future..should I keep the MS3, or sell it and get something different?
Erik
The next step is a 100 shot on the LG cam...NICE
Thanks guys for the heads up...
Also, I plan on building a bigger cubed motor in the future..should I keep the MS3, or sell it and get something different?
Erik
TECH Resident
Joined: Jan 2003
Posts: 855
Likes: 0
From: AUSTIN TX
Originally Posted by JakeFusion™
MS3 is a 113+0 and the MS4 is a 111+2. PtV will probably be very tight on the MS3 with 4 degrees of advance, but 2 degrees might work.
