SUMMIT PRO LS CAM TEST MULTI TEST! STAGE 4-FULL DYNO RESULTS

right here I've got a summit stage for pro LLS cam the question is how good is it in this video we're gonna run this stage for summit Pro elastic not just on one combination but on to a 5.3 and a 6.2 not only that one's a cathedral port and one's a wreck port does it work out both our first guests of the summit Pro LS camshaft came on a 5.3 this was a naturally aspirated combination and but we did eventually run this same camp shack with a vortex super turbine and it did very well as we would expect now this combination as we went over the combinations before this the 5.3 liter was from Strictly performance but it's important to note that you could get these same things from a like Boeing stock five liter from the wrecking yard because the the essentials are still there I mean you still have a set of 706 heads you still have the factory style piston and all of this combination would still work with a Boeing stock one from the right near does doesn't have to have the ported 7:06 heads like this combination did although those obviously helped but we've seen this kind of power from just putting this camshaft in a stock motor so it works really well now here is our combination the Strix a performance 5.3 liter and to get things started we ran it with an LS nine camshaft so it's a factory LS not it is a factory camshaft obviously it never came in the 5-3 but it's also important to note that this LS nine camshaft makes it a lot more power than a factory lm7 the factory five three can I mean we're talking by a lot we're talking about it'll change the power output from a typical 5.3 that will make 355 horsepower or so if you stick an LS nine camshaft in it it will be you know 410 or 420 so the ls9 cam is already a lot better than a factory cam so now let's take a look and see how much better the summit that Pro LS cam is and this is a stage-four camel and give you the specs on as soon as we add that camshaft but on are strictly performance 5:3 with the ls9 can this combination doing pretty well it made 428 horsepower and for an even four hundred foot-pounds of torque so it was already a fairly healthy combination and we ran this 5 3 as we described earlier but this thing was also equipped with the factory truck intake and a stock throttle vise so the early truck not even the Trailblazer SS and it had its head a long tube headers on and the Holley HP performance so it was doing well now here's what happened after we installed the summit camshaft so we got a big jump in power and not only that even though we started our run at 3,000 rpm because let's be honest how many people I get off I get asked that a lot hey can't you do wide open throttle up mm I want to know how often you think they're out wide open throttle at 2,000 rpm because if you're doing it like in a truck or something it's gonna downshift and any kind of automatic it's going to downshift into a lower gear I don't know how you can hold 2,000 rpm at wide open throttle or in what situation you'd actually do that but sometimes we do write it down that little bit on this one we're starting from 3,000 going up above 6500 which is kind of the range for these camshafts anyway but on the summit cam this was a stage 4 cam and it had it offered a 625 605 lifts split a 234 to 47 degree duration split and 113 Plus 3 and a half now this Camp Chef will fit with a factory piston to valve clearance and we did measure that so it was fine it was also fine on this somewhat modified stricted performance combination although it did have a factory style piston in it so it should give you an idea that this is a pretty big camshaft for a 5.3 meter and as will show later on it also works pretty well in a 6.2 liter because that camshaft is you know pretty healthy for these combinations so hook with that summit stage 4 cam the power output of our 5.3 liter jumped up to 475 horsepower and peak torque was up as well to 417 418 foot-pounds of torque so that's a pretty good healthy torque beam and the thing that I like about this camshaft on this particular combination is it a lot of times when we put camshafts in them we'll see a trade and power from low speed to high speed so we can pick up power at the top end but a lot of times we trade power down low now that would be less likely on this combination only because we started out with an LS 9 cam then the ls9 cam is kind of notorious for being soft download which it is there's a really wide LSA it's kind of designed for a positive displacement blower combination that already has a bunch of low smooth power from the immediate boost response so they soften that part up with the camshaft and improve power at the top and that's exactly what an LS 9 cam does but this summit cam was better everywhere offered a lot of power even on this v 3 and as I said this is a healthy camshaft but it work well good for a 5 3 and it ended up working even better when we added a fast manifold because we put a fast LSX our intake on this the power up had jumped over 500 horsepower with this camshaft which is pretty healthy for a 5 3 now let's take a look at our 6.2 liter our second test of the summit stage for pro LS cam that's a mouthful was on a larger 6.2 liter this was actually an LL 92 combination that we had taken off the variable cam timing and just put a fixed cam in to get things started we put a factory lq4 camshaft in and ran the six liter with long tube headers the Holley HP management system stuff we went over all that beforehand but it's important to note that when you're testing these cam shafts and you're gonna run something that's like this stage for cam from Summit Racing you want to measure you'll want to check piston to valve cleaners because every LS combination is different obviously when we test it in a 5.3 liter that has the smallest intake valve it's a cathedral port head the valve drop on that head obviously is different than on the 5:3 than it is on the 6.2 liter because of 6.2 litre had rectangular port heads and a bigger valve different valve drop you know the piston could be in a different position they're different Pistons so you really need to measure it because you're getting close with with a cam like this and it's important to have enough piston to melt there's it's also important obviously to have the right valve springs and on these we you know there's a lot of good valve springs out there sometimes we run that single beehive spring from combat 26 1918 although more often than not we'd like to put a good dual spring in like you know brand - it has a good dual spring guys from Summit offer one comp poppers when there's a lot of good stuff out there just make sure that you match the spring to the camshaft and intended rpm in usage it's tough because the spring rate is very important and it's also important to note that more spring pressure is not the answer we need to have the right spring pressure Kreuger camshaft in rpm and especially the especially the cam lobes so this does need to be stable and stuff so pick the right spring for your cam and your cam experts can help you do that this is our 6.2 liter with the lq4 cam as I said we're all dialed in with Holly and stuff so equipped with that lq4 ham this six-point-two inter proves 445 horsepower and 460 foot-pounds of torque which is pretty typical of a small factory cam like this it almost always makes more torque than horsepower and we see that in the for aid and the five three and the six other stuff with those small factory cams but here's what happened after we installed the summit cam and again this was the same cam that we ran previously in the 5.3 meter so that camshaft just as a reminder 625 605 lifts split to thirty four to forty seven degree duration split and a 113 plus three and a half and as you can see because we started basically with a milder cam on this 6.2 liter than we did on the 5-3 the difference in power we're showing here is much more dramatic but had we started with the factory lm7 cam we would also have a dramatic change in power from the 5.3 liter the other thing that helps this thing have an even bigger change in power for instance and so what are we talking about we went from four hundred and forty five horsepower and 460 foot-pounds all the way up to five hundred and sixty eight horsepower and 509 510 foot-pounds of torque so it's a big change in power from just the camshaft cam and Springs basically but the other reason we have such a big change is to because this motor is bigger so it's going to want to make more power and it has better cylinder heads I mean the 706 heads hello probably a hundred CFM less than these record heads do so this even more than the 5-3 this 6.2 liter combination was begging for more camshaft and when we put a good camshaft in it like this summit stage for cam we really get a big change in power I mean from 4:45 to 568 you're talking about you know 124 horsepower 120 320 for horsepower gain so that's a lot from a camshaft but the reason for that is because we started with such a mild cam and this combination is big as lots of head flow and Andrew the intake manifold on the cell line u2 is very good too it's that ly6 truck manifold which as I've shown previously in other testing is basically a duplicate of the ls3 cam in terms of power I mean it looks different in the shape different and it's a lot and it doesn't fit on somewhat some combinations because of the low profile nasaw the ls3 but fundamentally from a power standpoint they basically make the same power so that's why the 6.2 liter responded so well not that the summit cams not a good cam it obviously is it worked very well on both these combinations both on a 5-3 and on the 6-2 it worked very well made lots of power let's get to our conclusion what did you guys think about this test on the stage for pro LS cam from Summit Racing I mean it work well on the 5.3 liter it worked well on the 6.2 liter it also worked well like a feed report heads and rec port heads you know what else it also works well under boost armature holder guys thanks for watching make sure to like share subscribe ring the bell I'll keep testing these cans

Channel: Richard Holdener

Views: 90,461

Rating: 4.9664335 out of 5

Keywords: junkyard, ls, summit racing, stage 4, pro ls, 5.3L, 6.2L, lm7, l92, rec port, cath port

Id: 2kQKr1qtvVg

Length: 11min 35sec (695 seconds)

Published: Sun Mar 22 2020