just wondering....

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May 12, 2007 | 05:53 PM

erikthegoalie

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From: Margate, FL

just wondering....

is it true that the MS4 really has a more "usable" powerband than the MS3?
If so, why?

When I say "useable" I mean for the street...

Thanks
E

May 12, 2007 | 06:14 PM

LS1rulz

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From: Greenup, Kentucky

Just look at the valve events and see. I know the MS3's valve events aren't very impressive, and my buddy's dyno numbers backed that up. I haven't seen consistent MS4 numbers on dynos outside of TSP's. I'd love to see some independent results. With heads that can flow at the higher lift, of course, so that it isn't pointless to use the high lift lobes.

May 12, 2007 | 09:56 PM

Jbmoney21

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Quote:

Originally Posted by erikthegoalie

is it true that the MS4 really has a more "usable" powerband than the MS3?
If so, why?

When I say "useable" I mean for the street...

Thanks
E

I would say no as you have to rev it higher to see the true power from it. Going by you saying for the street

May 13, 2007 | 01:13 AM

LS1rulz

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From: Greenup, Kentucky

Quote:

Originally Posted by Jbmoney21

I would say no as you have to rev it higher to see the true power from it. Going by you saying for the street

You do? I mean, a local buddy with TSP LS6 heads and the MS3 made 430rwhp, but only like 370ft/lbs of torque. That's not much. If the MS4 is worse than that, then the advertising on it is all backward since it is advertised as having more power under the curve.

But even with that being said, why does revving it high have anything to do with the street? All these guys act like their cars won't downshift. It's absolutely stupid. Do they all run a 2.42 gear and never downshift or something?

May 13, 2007 | 01:19 AM

speed_demon24

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From: Ocala, FL

Quote:

Originally Posted by LS1rulz

Because on a street car it spends 99% of the time between 1.5-3k and we don't want to always have it at 5k+ just to have any power.

May 13, 2007 | 01:22 AM

LS1rulz

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From: Greenup, Kentucky

Between that range, I still have more than enough torque to pull and pass 99% of the cars we'll be seeing during daily driving. So that argument is invalid. But in defense of that argument, on the other hand, I have something other than an MS3/4.

May 13, 2007 | 08:51 AM

Patrick G

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From: Victoria, TX

Because the MS4 has an earlier intake valve closing point (for more dynamic compression), more duration at .200, more lift, later exhaust valve opening point (allows longer power stroke and builds more torque).

If you put the MS3 on a 111LSA and advanced it +3, it would be very close to matching the MS4 in power and torque.

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