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Hand ported tb and eliminated stock exaust

This is a discussion on Hand ported tb and eliminated stock exaust within the External Engine forums, part of the LSx Technical Help Section category; Yesterday I hand ported the throttle body on my 98 ls1 and cut out the rear muffler and stock exaust ...

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    Gold Member BlwnCamaro's Avatar
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    Hand ported tb and eliminated stock exaust

    Yesterday I hand ported the throttle body on my 98 ls1 and cut out the rear muffler and stock exaust pipes and turned it down before the rear axle. Keep in mind that the car has stock manifolds and cats so it is actually suprisingly quiet cause the cats act as little mufflers. Anyways, holy crap did it make a difference. The car is a little louder of course so that plays with your mind, but seat of the pants is noticably more torquey and top end is better also. I was rolling on in second with no clutch drop and burning street tires into third. The car never did it like that before. The car is a 6spd with 3.42's and I already had done the free ram air, throttle body bypass, cut down egr tube, mti lid, smooth bellows and maf end, descreened maf, pro 5.0 shifter, Z06 clutch and poly trans mount. However the thottle body port job and muffler delete was satisfyingly rewarding considering it was free and plus I lost at least 40 pounds with the muffler and pipe delete. The car is running great with just free mods and a few small bolt ons. Look soon in the kills for some videos of me against my buddies C5 ZO6 it is a pretty good race! My camaro suprises me with just a few bolt ons, as I've been steadily outrunning evo's, vettes, mustangs, cobras and others.

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    Its nice to see another 98 rippin up the streets!

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    Senior Member Too Fast's Avatar
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    Nice job. Ever been to the drag strip?

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    Gold Member BlwnCamaro's Avatar
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    Quote Originally Posted by Too Fast View Post
    Nice job. Ever been to the drag strip?
    Yea I ran 12.9 at 110 before mods at no problem in louisiana at sea level. With free mods and few bolt ons the car is definately faster and should be good for mid 12's at sea level with decent traction. My runs against the 02 Z06 support that also as we traded off for a kill and a loss each and also similar results against 03/04 cobras.

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    Gold Member BlwnCamaro's Avatar
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    Quote Originally Posted by 9t8z28 View Post
    Its nice to see another 98 rippin up the streets!
    Thanks man. Nice burn out in the avatar by the way!

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    Senior Member Too Fast's Avatar
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    My burnout is lame copared to 9t8z's, excellent burnout, 9t8!
    Yeah, Blwn, your 1/4 #'s back up your Z06 kill story. My best so far was a 13.17 with a missed shift into 4th, @ 101. When I have hit all the shifts, (almost always!) my best has been a 13.2x @ 105.x-107.5. Now that I have my LT, ORY, this spring I am hoping to touch the 12s, street tires.

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    Gold Member BlwnCamaro's Avatar
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    Quote Originally Posted by Too Fast View Post
    My burnout is lame copared to 9t8z's, excellent burnout, 9t8!
    Yeah, Blwn, your 1/4 #'s back up your Z06 kill story. My best so far was a 13.17 with a missed shift into 4th, @ 101. When I have hit all the shifts, (almost always!) my best has been a 13.2x @ 105.x-107.5. Now that I have my LT, ORY, this spring I am hoping to touch the 12s, street tires.
    Oh yea you should hit 12's with the long tubes and ory. They make a big difference from what i've seen. Thats the next step for me also. Good luck and have fun!

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    what tools did u use to port the throttle body?

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    Gold Member BlwnCamaro's Avatar
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    Quote Originally Posted by sscamaro1384 View Post
    what tools did u use to port the throttle body?
    I used a high speed electric router tool that looks like a big dremel, you could use a dremel it would just take longer. Use the porting bits that look like long cones that are spiral wrapped in what looks to be thick sand paper on them. I smoothed all the ridges out and hogged out a signifigant amount of material to make it bigger also. Be careful where the iac ports are just leave them alone. I also hand polished it and ground and smoothed the throttle blade screws and shaft, like shaner does. Good luck just take your time, it does make a noticable difference.

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