SLP 421 Bobcat goes 12's - LS1GTO.com Forums

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Old 08-31-2004, 08:12 AM   #1
DevilYellow
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SLP 421 Bobcat goes 12's

The 421 Bobcat went 12.63 at 109.38 on Drag Radials during last Thursday's track session. Our heavy-duty, adjustable rear sway bar (which should be available soon) does wonders for traction. The car should be even quicker once we install the long-tubes (it's got our mid-lengths on it at the moment) and after the weather cools down a bit.

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Old 08-31-2004, 08:37 AM   #2
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Excellent!!! Rear sway bar.......I must buy more lotto tickets.....
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Old 08-31-2004, 09:40 AM   #3
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Old 08-31-2004, 01:40 PM   #4
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Outstanding results. Nice to see the 421 live up to it's heritage. I seem to remember that Jim Wangers confessed some time ago that the original Car and Driver test 1964 GTO had a 421 slipped in.
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Old 08-31-2004, 02:25 PM   #5
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Mmmmm, nice times. That is a great package. Hood looks pretty good too. I was skeptical at first but at least that angle looks good.
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Old 09-04-2004, 11:15 AM   #6
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Quote:
Originally Posted by DevilYellow...
The 421 Bobcat went 12.63 at 109.38 on Drag Radials during last Thursday's track session. Our heavy-duty, adjustable rear sway bar does wonders for traction.

What was the 60 ft?

How much is the sway bar?

Does it hurt the handling?

Thanks
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Old 09-04-2004, 12:57 PM   #7
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Isnt this the same car that ran 13.1/13.0 before it got a 421? Good numbers but the lack of MPH and ET for a 421 LS1 is kinda blah
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Old 09-04-2004, 01:33 PM   #8
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I thought it was pretty respectable. I don't know what they ran prior to the 12.6 as far as mph but I would imagine it would have to shoot up 5 or 6mph all things being equal.
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Old 09-04-2004, 05:44 PM   #9
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Quote:
Originally Posted by GTPprix...
Isnt this the same car that ran 13.1/13.0 before it got a 421? Good numbers but the lack of MPH and ET for a 421 LS1 is kinda blah

It doesn't have a 421ci engine, dunno why they called it 421 it, the SLP bobcat has all SLP bolt ons and tuning (catback, headers, underdrive pulley, MAF).

and a thicker rear sway bar, people laughed 6 months ago when I said a thicker rear sway bar would help traction.

edit: has SLP 1.8 rocker arms too.
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Old 09-04-2004, 07:43 PM   #10
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Ah if it's not 421 CID thats pretty damn good I was thinking it was a 421 CID setup, I was like WTF?
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Old 09-04-2004, 07:45 PM   #11
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Quote:
Originally Posted by GTPprix...
Ah if it's not 421 CID thats pretty damn good I was thinking it was a 421 CID setup, I was like WTF?

so then what does the "421" mean?
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Old 09-04-2004, 08:03 PM   #12
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I'm guessing 421 horsepower
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Old 09-04-2004, 08:10 PM   #13
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Quote:
Originally Posted by GTPprix...
I'm guessing 421 horsepower

yeah, that could be.

but isn't that sort of a silly way to name a car. i mean, if they make one change and the power changes, then it wouldn't be 421 anymore. ya know?

i was thinking maybe it was like the 442s (4 carbs, 4 speed, 2 exhaust). but for the life of me i can't think of what 421 would represent.
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Old 09-05-2004, 08:40 AM   #14
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Quote:
Originally Posted by GTOdriver7...
yeah, that could be.

but isn't that sort of a silly way to name a car. i mean, if they make one change and the power changes, then it wouldn't be 421 anymore. ya know?

i was thinking maybe it was like the 442s (4 carbs, 4 speed, 2 exhaust). but for the life of me i can't think of what 421 would represent.

MDMC names its packages the same way so I can't say that's a bad way to name the cars anymore.
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Old 09-05-2004, 08:54 AM   #15
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Quote:
Originally Posted by phobos512...
MDMC names its packages the same way so I can't say that's a bad way to name the cars anymore.

yes, but the MDMC is an actual package. i mean, with the 510 package you get this intake, this exhuast, etc etc.

but i still have not heard of SLP calling the 421 a "package" yet. it seems that they are just calling their project car "The 421 Bobcat". just like AP has the "Tiger GTO", etc. but maybe i am wrong.
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Old 09-05-2004, 09:00 AM   #16
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Quote:
Originally Posted by GTOdriver7...
yes, but the MDMC is an actual package. i mean, with the 510 package you get this intake, this exhuast, etc etc.

but i still have not heard of SLP calling the 421 a "package" yet. it seems that they are just calling their project car "The 421 Bobcat". just like AP has the "Tiger GTO", etc. but maybe i am wrong.

It may very well be that the package simply hasn't been announced yet. You never know.
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Old 09-05-2004, 09:01 AM   #17
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Yes you are wrong, it is sold as a package w/ embelms and all. The package includes:

Mass-Air-Flow Sensor
Loudmouth or Power-flow exhaust system
Underdrive Pulley
1.85 Ratio Rocker-Arm Package(rockers, heavy duty valve springs, titanium retainers, and keepers)
Mid Length Headers (with your choice of cats or race pipes)
Custom PCM tune

IIRC, last time I spoke w/ Joey they were running no cats and a loudmouth in their kit.
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Old 09-05-2004, 09:05 AM   #18
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Quote:
Originally Posted by gtodoug...
Yes you are wrong, it is sold as a package w/ embelms and all. The package includes:

Mass-Air-Flow Sensor
Loudmouth or Power-flow exhaust system
Underdrive Pulley
1.85 Ratio Rocker-Arm Package(rockers, heavy duty valve springs, titanium retainers, and keepers)
Mid Length Headers (with your choice of cats or race pipes)
Custom PCM tune

IIRC, last time I spoke w/ Joey they were running no cats and a loudmouth in their kit.

ah, ok. thanks for the info. did they give a price?
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Old 09-05-2004, 09:13 AM   #19
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No, I am a SLP distributor/authorized installation center here at my dealership. We got the specs about a month ago but they don't list a package price. All the parts can be sold individually though. You can look it up on their website.
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