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How good is the stock catback pipe?? + $2 worth of washers worth 4 RWHP,with sheets.

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Old 04-12-2012, 09:28 PM
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Originally Posted by 54inches
ha ha ha fat boy, don't get mad because mommy took away the donuts this morning.

Now get out there and take me some fn pictures *******!
LOL, you figure it out....I did.

Might wanna call someone to hold your hand while you take out the 4 bolts
Old 04-12-2012, 09:32 PM
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Originally Posted by projectX
^^^ LMAO Should add the radiator mod to free mods list though.
They really should, its worth it.....I was surprised even on a heat soaked engine.

Course you will have to get someone to take pictures and make a 4 paragraph instruction post to take out 4 10mm head screws
Old 04-12-2012, 09:52 PM
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Originally Posted by FASTFATBOY
Point I am making on the catback is guys buy $500-600 catbacks to make 5 more rwhp that I did with the stock setup with a good muffler.
But that $500+ spent on a catback bought all new piping and new tips made of quality material that's going to last. Versus old, hacked up stock junk with an aftermarket muffler, not really the same thing. I see your point with what you did though, definitely a great alternative if performance is your only goal.
Old 04-13-2012, 08:21 AM
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Originally Posted by FASTFATBOY
LOL, you figure it out....I did.

Might wanna call someone to hold your hand while you take out the 4 bolts
I don't have hands, so I will just watch.
Old 04-13-2012, 08:41 AM
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Originally Posted by FASTFATBOY
Of????
I wasnt sure about the exhaust setup..

Originally Posted by Mr. Hyde
Pics of the washers or bs.
LOL
Old 04-13-2012, 08:42 AM
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Originally Posted by TransAmWS.6
But that $500+ spent on a catback bought all new piping and new tips made of quality material that's going to last. Versus old, hacked up stock junk with an aftermarket muffler, not really the same thing. I see your point with what you did though, definitely a great alternative if performance is your only goal.
Quoted for truth..
Old 04-13-2012, 09:26 AM
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Originally Posted by thunderstruck507
I remember many years ago reading where a magazine did the washer shim trick and some other free mods to a ls1 car.
I googled that, cant find it.
Old 04-13-2012, 10:22 AM
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FFB, you have a lift in your shop...?
Old 04-13-2012, 10:46 AM
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Originally Posted by 99'CajunFirehawk157
FFB, you have a lift in your shop...?
I do, yassir
Old 04-13-2012, 11:23 AM
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Originally Posted by FASTFATBOY
I do, yassir
Congrats, I swore after crawling my fat *** under my car countless times doing headers and motor mounts this past winter on my car, I would not do it again until I have a lift which of couse means building another shop due to my normal garage ceiling height of our attached 2 car garage. Looks like your shop is a pole barn too? Considering a 30x40 or 40x40...?

My back still hurts...
Old 04-13-2012, 12:14 PM
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Originally Posted by 99'CajunFirehawk157
Congrats, I swore after crawling my fat *** under my car countless times doing headers and motor mounts this past winter on my car, I would not do it again until I have a lift which of couse means building another shop due to my normal garage ceiling height of our attached 2 car garage. Looks like your shop is a pole barn too? Considering a 30x40 or 40x40...?

My back still hurts...
Yeh my body is all fucked up, I am WAY too old to do this **** on the ground any more.

My road race car is also a street driver, so every event I go to I swap pads, rotors,wheels, put on brake ducts and every other event do an oil change... its a PITA.

Shop is a 20x30 pole barn, bottom of joist is 9 ft, roof of car goes up between the joist(6 inches past joist). The rack goes all the way up, 74 inches.

Look on GregSmithequipment.com thats where I got my lift. Put it up about 2 weeks ago with a buddy.

Last edited by FASTFATBOY; 04-13-2012 at 04:42 PM.
Old 04-13-2012, 03:13 PM
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Just got done doing the shim mod. Thanks man!
Old 04-13-2012, 04:39 PM
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Originally Posted by projectX
Just got done doing the shim mod. Thanks man!
Please post pics for the 'tards in this thread LOL.

BTW, you MIGHT be able to shim it higher than a 1/8 inch. Put a little grease on the highest part of the lid and lightly shut the hood to see if it touches, go as high as you can.

Dont slam the hood, it will break your lid.
Old 04-13-2012, 05:43 PM
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Just got the one pic - stacked two washers to 1/8" high.

Old 04-13-2012, 06:01 PM
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The hood touch your lid? Mine just barely does touch.
Old 04-13-2012, 07:17 PM
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Nope clears just fine - though I wouldn't slam it. lol
Old 04-13-2012, 08:29 PM
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How does shimming the radiator hold down pick up HP?
Old 04-14-2012, 11:27 AM
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because its also your lower air box so it cools faster and stays cooler, because it only has 4 small points of contact.. VS laying right on top of the radiator, holding in all the heat.. cooler air more power

thats my take on it anyway i could be wrong
Old 04-15-2012, 10:04 AM
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Ok that makes sense. Thanks for the help.
Old 04-15-2012, 10:58 AM
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It opens the gap in the inlet between the box and top core support.

I was curious years ago when my buddy had is 400rwhp cam only 2002 SS on the rollers. I was curious about the power difference between a WS6 lower box and a SS lower box,the WS6 lower box(and only this one) has a bigger(taller) opening under the front.

SO after he made his pulls, I pulled up his lower box and stuck 2 screwdriver handles under the box and did a pull.

Average HP went up like 5hp, bottom end tq went WAY up on the initial hit, like 15 ft lbs and carried it to like 4500rpm then it leveled out with the previous pulls lines.

I was shocked.

I could see where if you put all the big stuff, big lid, big MAF, big TB and a SLP style front facing hood with the WS6 lower box it would be worth some power(not to justify all the cost, but if you got good deals on all of it or it was a max effort car).

This test was the reason I put a LT1 WS6 airbox and WS6 style hood on my LT1 car, it was just as good as the setup I have now.


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