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12-02-2008, 10:35 AM
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#1
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Senior Member
Join Date: Jul 2008
Posts: 739
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MSD 2 step launch control & cats
I've launched my car ~10-12 times with the MSD 2 step. I started getting worried after reading on several boards that the 2 steps were ruining people's cats, so I purchased an off-road X-pipe. I took the car over to RET today to have them install the X-pipe and give me a 100 octane tune. I just got a call from Greg, saying that it's a good thing we removed the cats because they were already clogged.
So just an FYI, if you run a 2 step, don't run cats.
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HP numbers are good and all, but they are like asking someone how much they can bench. What difference does it make if I can still kick your ass?
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12-02-2008, 11:26 AM
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#2
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Resident Avatar Gambler
Join Date: Nov 2006
Posts: 5,997
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Quote:
Originally Posted by joedls
I've launched my car ~10-12 times with the MSD 2 step. I started getting worried after reading on several boards that the 2 steps were ruining people's cats, so I purchased an off-road X-pipe. I took the car over to RET today to have them install the X-pipe and give me a 100 octane tune. I just got a call from Greg, saying that it's a good thing we removed the cats because they were already clogged.
So just an FYI, if you run a 2 step, don't run cats.
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Bummer, thanks for the head's up. More importantly though, what did the car put down? |
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12-02-2008, 11:32 AM
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#3
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Senior Member
Join Date: Jul 2008
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Quote:
Originally Posted by SeanPlunk
Bummer, thanks for the head's up. More importantly though, what did the car put down?
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Don't know yet. He just finished installing the X-pipe. He was getting ready to tune it. I'll pick it up in about an hour.
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HP numbers are good and all, but they are like asking someone how much they can bench. What difference does it make if I can still kick your ass?
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12-02-2008, 11:43 AM
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#4
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Resident Avatar Gambler
Join Date: Nov 2006
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Cool, post up when you get numbers. I'm going to eventually get an x-pipe for my car too, but I'll probably get a catted one. Identically modded cars are making about +10-15 RWHP with them, so it's definitely on my list. I don't want to risk getting fined for no cats though so no off-road pipe for me  |
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12-02-2008, 11:43 AM
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#5
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Resident Avatar Gambler
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By the way Joe, I'm planning on going to the dyno day at RET on the 20th. I'm not going to dyno, but I'm going to go hang out. Are you interested?
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12-02-2008, 11:50 AM
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#6
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Senior Member
Join Date: Jul 2008
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Quote:
Originally Posted by SeanPlunk
By the way Joe, I'm planning on going to the dyno day at RET on the 20th. I'm not going to dyno, but I'm going to go hang out. Are you interested?
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I wasn't planning on it. My social director(wife) probably wouldn't be too happy if I did, since I'm going racing this weekend and next weekend, too. But I might be able to get away for a little while.
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HP numbers are good and all, but they are like asking someone how much they can bench. What difference does it make if I can still kick your ass?
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12-02-2008, 12:03 PM
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#7
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Resident Avatar Gambler
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Quote:
Originally Posted by joedls
I wasn't planning on it. My social director(wife) probably wouldn't be too happy if I did, since I'm going racing this weekend and next weekend, too. But I might be able to get away for a little while.
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LOL, believe me, the last thing I would want to do is get you in trouble with your social director  |
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12-02-2008, 12:05 PM
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#8
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Resident Avatar Gambler
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Oh, and does your car have a forged bottom end? I'm just curious because with the blower and nitrous I'd have to guess you're in the 525-550RWHP range at least depending on the size of the shot....
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12-02-2008, 03:40 PM
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#9
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Senior Member
Join Date: Jul 2008
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Quote:
Originally Posted by SeanPlunk
Oh, and does your car have a forged bottom end? I'm just curious because with the blower and nitrous I'd have to guess you're in the 525-550RWHP range at least depending on the size of the shot....
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No, I'm not forged. That is what is limiting the size of the shot. I'm spraying a 50 HP shot now. I made 470 RWHP and 498 lb-ft of torque today. That's 20 peak HP more than my last dyno session, but a whopping 42 lb-ft of peak torque increase. From 4000 RPM to about 5500 RPM, I'm making 30 - 40 more HP than my last session.
I believe I'm pretty much pushing it with my stock internals now.
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HP numbers are good and all, but they are like asking someone how much they can bench. What difference does it make if I can still kick your ass?
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12-02-2008, 04:01 PM
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#10
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Resident Avatar Gambler
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Quote:
Originally Posted by joedls
No, I'm not forged. That is what is limiting the size of the shot. I'm spraying a 50 HP shot now. I made 470 RWHP and 498 lb-ft of torque today. That's 20 peak HP more than my last dyno session, but a whopping 42 lb-ft of peak torque increase. From 4000 RPM to about 5500 RPM, I'm making 30 - 40 more HP than my last session.
I believe I'm pretty much pushing it with my stock internals now.
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Then you can blow it up and make it faster  |
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