Damage Inc.

iTrader: (7)

I noticed that MTI came out with a new Stealth series cam that looks attractive. I run a bolt on A4 now and I want to cam it. I may run heads in the future, but I want to know which cam will make more power and be more streetable.

MTI S2 - 224/220 .576/.581 116 LSA

vs.

TR - 224/224 .561/.561 114 LSA

So which would be a better cam for an A4 with heads in the future and still ROCK in the mean time?

Thanks.

99 Black Bird T/A

iTrader: (4)

I talked with Paul at Thunder about a 224/220 last year vs a 224/224 and what the effects would be. As I recall the bottom line was the 224/220 wasn't going to make more power than a 224/224 but it might idle a hair nicer with good tuning. Other than sound effects & idle I think the 224/224 singles are the way to go unless your after stealth. If you after stealth the LPE GT2-3 can work nice basically it's a big LS6 cam but the GT2-3 is a small cam. I have a 224/224 and with an SLP dual/dual and no cats my car is quiet than my wifes 02 Z28 with a loud cat-back. There is also a good chance the LSX intake may make the reverse split a thing of the past.

224 cams on a 113 LSA or 114 LSA are very streetable with good tune. The only time my M6 T/A w/224 XE-R on 113 LSA has had difficult time was going slow up hill in a crowded parking deck. In an A4 the TSP 224 XE-R on a 114 LSA would be nice or a custom 224 XE-R on a 115 IMO.

I'd lean toward the TR 224 between the two cams.

lsx24

iTrader: (45)

From reading the big thread on the MTI stealth 2 cam, it looks like there is little gain down low compared to the stock cam. I was wondering about this as well, because I want to be careful not to lose any possible tq I may get from a smart cam upgrade. A TR224 is a KNOWN good all-around cam for ls1s, with or without heads done. It has good valve events supposedly, and thus produces more power than it should.

I like the idea of a stealth cam, but I think the nature of a stealth cam (i.e., smooth like stock idle) inherently limits the amount of tq it can produce down low. Correct me if I'm wrong, but I think a TR220 might be a good compromise between the two. I mean, good tq increase at ALL RPMs, but the ability to tune in a almost stock sounding idle, and decent off-idle power.

Raughammer

The Stealth is a killer cam ..but it will not make the power of a 224/224 cam if everything else is equal the bigger cam will make more power. But... the Strealth will be a peice of cake to tune for, it will idle smooth, it will be easier to "deal with" for a relative new guy or a fella who just does not want to "have any probs".

The Thunder 224 should make more power.
But the C2-224 From MTI should make more power than the Thunder 224 because of it's higher lift.

See? where do you stop? The bigger you go the more compromises you have to make. Just the nature of the beast.
'

z98

Power output will be pretty even, the TR should be up maybe a couple at peak.

The S2 will idle better.

For an A4 that's driven regularly, I'd probably pick the S2 if those were my choices.

Damage Inc.

iTrader: (7)

I really want to keep a nice idle and still make good power. My car launches like a son of a BIT#$, but it falls off a little after 2nd gear hits and doesn't pull as hard as it should. I just need a cam that'll give me a stronger midrange and topend so I can keep a strong pull.

What cam would you guys suggest between the available proven cams that are out there? Thanks again.

Bowtieman4life

iTrader: (1)

the MTI cam should make more power. The exh lobe is an XE-R lobe which is more aggressive than the XE lobe. It also has more lift. The Intake lobe is also better because of the higher lift. I am thinking its also an XE-R lobe with just a little less advertised duration but I am not sure. I will put my money on the MTI cam. The one thing I don't like is the 116 lsa. IMHO

Damage Inc.

iTrader: (7)

What's wrong with a higher LSA? I thought that that made it idle smoother. What are the negative effects of a higher LSA when compared to that of a 114?

lsx24

iTrader: (45)

That tends to make it more docile, but it has nothing to do with lsa exactly. LSA is easy to compare among some of these cams, but in reality the total overlap is what makes the difference. If you have the chance to compare a 110 lsa custom with a 116 lsa custom, they might very well idle identical! (if the other specs add up different when computed together--like lobe profile/ramp rate and duration etc).

But the idea is that with a higher lsa (i.e., a lower overlap), you will make less power and idle better, generally speaking. Also, after you go over a certain amount of overlap, the car will be harder to get to smog.

I really wonder about the MTI S1 cam. I mean, from the dyno graphs I've seen, it doesn't pick up much, if any, tq over a stock cam till almost 4k. It basically looks like a stronger version of the ls6 cam. I saw those dyno graphs of that cam in that big thread, and that is what I'm basing my doubt on, that it might be functionally impossible to get good midrange and low grunt with a stealth cam. Maybe the S2 doesn't share those same traits, I wish I knew why that was like that.