Hey folks. I've been reading quite a bit lately about C5's with Magnuson SC's added to them and I need to get some more information about what people are seeing.

I have seen some impressive power numbers listed here and I just haven't seen, even the included, Superchips tuners make the baseline numbers listed so I have to ask....

First of all, how many of the Magnuson users here have a blower cam and ported heads in addition to the SC?

Second, how many are using a type of intake cooling device such as Alcohol Injection and/or an intercooler?

I know any SC is going to add some heat to the intake, but a roots style SC is really known for that so how are people dealing with heat?

Anyone? :)


[Modified by Mr Cowl Hood, 6:53 PM 4/30/2003]

 

What specifically are the numbers you are questioning? Keep in mind that the #s here also might vary based on dyno used as well as aggression in tuning. My car picked up about 86 rwhp, with what I'm assuming is a conservative tune since it was done by LPE and they are known for not pushing the envelope too hard (which might also be why they are known for longevity).

Certainly a fair question, as various folks here have added just more than the SC. My engine is completely stock, other than the SC and a Vortex air box. The highest numbers I've seen so far personally on a Magna, cam, headers car was 457 rwhp.

Another good question -- if you can wait a few months, remind me to report, as the Dallas heat might put a pretty good test to mine.

:eek: :seeya

 

My car dynoed @ 428 rwhp with headers and everything else stock except air intake with superchips programming. The only problem is it was running a fuel ratio of 13:1 which could have been harmful to the engine. As far as heat issues, if you had a cooler charge coming in you would get a little more hp and could bump the timing a little. There will not be any heating issues though. Even at the track as long as you put in a 160 thermastat.

Tod


[Modified by GraveDigger, 10:02 PM 4/30/2003]

 

For example, an 02, convert M6 with the basic, same mods as Grave Digger, Vortex, LT's, Stingers, etc made only 383 rwhp on the dyno with the Superchips programmer module. Was his extremely low as a baseline or was yours extremely high?


[Modified by Mr Cowl Hood, 11:29 PM 4/30/2003]

 

Grave Digger, the T-stat doesn't have much to do with the intake air temps, but a 160 T-stat is a good idea in warmer climates.

What were your IAT's when you dynoed? Do you know? That would be interesting to know.

 

Yep, I have seen some Magnuson cars with head/cam/headers get 450rwhp.

You should also consider some of the other options. :yesnod:

Depending on what your goal is. . .the ATI will get you 450 without any other mods. If you add LT's you will be right around 500rwhp.

Unfortunately, I don't have enough experience with the Vortech to speak about them.

 

I agree with Hogurt on the cam and heads numbers for Magnuson SC's. At least it makes sense, but how are people getting 420-440 without H/C's?

I also agree that ATI and Vortech could make 450-540 with very little else.

That's been proven, but I'd like to hear from the others with Magnuson's. Anyone? IAT's? That's what I'm looking for. Can I also assume the posted Magnuson #'s have been on 93 pump gas?

 

I guess it would depend on what his dyno #s were before the SC. Magnacharger and LPE both use 100 flywheel HP as an average return from the SC, and if you assume a 15% loss for an MN6 car, that translates to 85 rwhp gain on an MN6 -- as I indicated above, I picked up 86 rwhp, so I was almost dead on to those anticipated values.

Grave Digger's numbers are about the most impressive I can recall seeing here for someone that is not an LS6 engine or as an LS1 that doesn't also have a cam; this is even more true given that his original #s were with the superchips program. Indeed, others here have reported some danger of detonation using the superchips program, so I'm not sure what's up with that. Perhaps his tune is more aggressive or he is getting a real benefit from his headers? :confused:

Speaking of headers, and this comment may open a can of worms, but I have yet to see decent data here showing that headers alone make much difference with a Magnacharger. There's lots of folks assuming it so and concluding as such based on principle, but I haven't seen real numbers yet. I know Joecoool put LGM long tubes on his Magna'd Z06, and on NA applications those headers have shown to be impressive; however, on his Magna car, the increase was not huge and it also may have benefitted from removing the cats, which he also did at the same time (http://forums.corvetteforum.com/zerothread?id=502832) -- I think he also has a cam in his car, so that makes it still harder to figure things out. When I last checked, headers also will void the third party warranty that's available on an engine with a Magncharger, although evidently that warranty is currently being revised so who knows what's coming on that. :rolleyes:

Agreed; as far as bang for the buck goes along with the Magan SC, I think the cam is the next best investment. However, at that point you're into the engine, which somewhat begs the question of having not gone the heads/cam route in the first place. Of course, an SC cam will differ from an NA cam, but the lines of what makes the most sense certainly start to blur at that point. Also, I wonder if you add the cam whether you're not starting to jeopardize the engine reliability which is one of the big selling points of the Magna in the first place? But, you still have the monster down-low torque, which I admit is certainly fun to have. But, I haven't yet ridden in an ATI car to see how it compares to instead get that power at the top end.

.

Yep, I always use 93 octane pump gas.
:seeya

 

Grave Digger's numbers are about the most impressive I can recall seeing here for someone that is not an LS6 engine or as an LS1 that doesn't also have a cam; this is even more true given that his original #s were with the superchips program. Indeed, others here have reported some danger of detonation using the superchips program, so I'm not sure what's up with that. Perhaps his tune is more aggressive or he is getting a real benefit from his headers?

That's just my point. With intake temps (IAT) of over 220* F, there's no such thing as an aggressive tune :eek: Certainly others who have installed and tuned Magnachargers have seen this, right?

That's why I keep asking about heat issues. Headers and Tstats won't affect this so where's the trick? It certainly isn't in the tuning. I see tuning gains of ~10-15 hp over base on these, but again, how can there be so much descrepancy over base numbers?

Ruling out Lingenfelter with their set up. I don't really count those reported numbers because, undoubtedly, L's found some mechanical massaging of the parts to make more, safe, hp numbers but even they must have had some issues with heat build up.

Though I haven't seen many answers to my questions, this is a good discussion. Let's keep it up. :)