Lets keep this apples to apples comparison VERY simple:

1. If you are concerned about emissions, get the B1
2. If you want slightly better idle characteristics, get the B1
3. There is NO performance sacrifice between B1 and T1
4. The T1 cam benefits 6-speeds more because of the increased midrange torque for daily-driving. Just a "fun factor" and nothing else.

Here is a 2-year old dyno graph that shows you how close these cams are. Three different cars that came into the shop and got the exact same modifications:

Borla catback with middle plate
MTI airbox
K&N filter
MTI stage 1 heads
stock LS1 intake
ASP crank pulley
MAC headers with catalytics
NO free mods

The car with the blue graph is the T1 cammed car. Notice how the lower/midrange torque is slightly better, yet the upper racing powerband is identical? It doesn't get any better than this for comparison. The other two cars are B1 cammed cars. Pretty consistent huh?



Hope this helps, there really isn't anything else to wonder about between these two cams.

Tony

 

I think Brian at HI-tech is on to something, all combinations are about compromise, and with a choice between intake and exhaust duration, i'd
favor the intake. Overlap issues limit the ultimate duration specs.Without raising compression,single pattern seems to be key, remember Exhaust system behaves differently,you have hi speed gasses working together(scavenge affect) Intake system robs flow from each other in the manifold. Extra exhaust duration has a EGR effect on lower rpm efficency. (diluted, lazy,
performance) can any one add to this?
n

 

Chris, I understand your point and agree. For 99% of the folks on here, that do not have that 5 million bucks of testing money mentioned. A good, proven single pattern will usually be just the ticket for them.
Cam-wise, I find it hard to tell someone to "try it out...I hope it works well for you". Cams are expensive.

A single pattern cam mated to a compliment of well chosen and proven supporting parts has MORE than proven it's worth/value in the street/bracket racing scene.

Again... we both agree with your statements...we are just on the opposite sides of the fence on this issue and tend to speak from our perspective paradigms.

Later amigo.


John Campbell.

 

Heh, nope, and I wouldn't tell someone "try it, hope it works, if not - tough".

And when I reccomend cams they tend to be single patter also - so I believe we agree on that. I was just trying to be factually correct and not discourage people from trying new things. i would be interested in seeing how a 224/221 vs. 224/224 vs. 221/224 worked out, or something along those lines (all with similar lobes).


Chris

 

your the man john!!!!!you knowledge overwelms me!!!! <img src="graemlins/gr_cheers.gif" border="0" alt="[cheers]" />

 

Explain one thing to me. I understand Lift and Duration but what Does LSA have to with the CAM. Do you need computer Reprogramming for the B1 how about the T1 (M6)
Thanks
<img src="graemlins/gr_cheers.gif" border="0" alt="[cheers]" />

[ January 05, 2002: Message edited by: LS1 Mopar Turbo ]</p>

 

Mopar, the "search" feature is your friend <img src="gr_images/icons/wink.gif" border="0">

Here, I did the research for you, enjoy reading this thread about LSA: Lobe Seperation Angle

Tony

 

Got it! Thanks! I guess it is the B1 for me too. I rode in John B's car he just put it in boy it pulls really hard at the top end. He only had the Maf translator, so I don't think I'll mess the computer.
<img src="graemlins/camaro.gif" border="0" alt="[Chevrolet]" />

 

[quote]Originally posted by Raughammer:
<strong>
Single pattern vs. Dual pattern.
A dual will always perform better than a single pattern? All I can say to that is horse ca-ca. <hr></blockquote></strong>

See I don't agree with that though, and I thought I outlined why above.

It's not a question of weak or strong or whatever ports. We are talking to physically different objects operating under different conditions (atmospheric vs. combustion press/temp).

Just in a general, abstract sense what are the odds that out of the infinite possibilites the intake and exhaust will have exactly the same flow requirements vs. crankshaft degrees (hence needing the same cam profile). I would say virtually zero.

But that's theory - how does it translate? It depends on the whole setup as you pointed out. And does that mean you want a 221/241, 221/224, 221/218, 221/222, 222/221 (and then that is just duration at 0.05 - maybe the intake wants a quicker lobe and the exhaust wants a bit of a lazier lobe - very possible actually).

What does this mean to me? I don't have 5,000,000 dollars to spend on dyno testing most cams in the configuration I want, for the exact set of specifics out there.

And the point is the single patter cams are *good compromises* they generally guarauntee good performance with good idle, etc. Since a cam is all about compromises anyway a "good compromise" isn't such a bad thing.

Chris Bennight

 

[quote]Originally posted by Nine Ball:
<strong>Lets keep this apples to apples comparison VERY simple:

1. If you are concerned about emissions, get the B1
2. If you want slightly better idle characteristics, get the B1
3. There is NO performance sacrifice between B1 and T1
4. The T1 cam benefits 6-speeds more because of the increased midrange torque for daily-driving. Just a "fun factor" and nothing else.

Here is a 2-year old dyno graph that shows you how close these cams are. Three different cars that came into the shop and got the exact same modifications:

Borla catback with middle plate
MTI airbox
K&N filter
MTI stage 1 heads
stock LS1 intake
ASP crank pulley
MAC headers with catalytics
NO free mods

The car with the blue graph is the T1 cammed car. Notice how the lower/midrange torque is slightly better, yet the upper racing powerband is identical? It doesn't get any better than this for comparison. The other two cars are B1 cammed cars. Pretty consistent huh?



Hope this helps, there really isn't anything else to wonder about between these two cams.

Tony</strong><hr></blockquote>

Tony, this graph is EXACTLY what I was looking for. Thanks a million! After seeing that, I’m defiantly going to stick to the B1.