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Ported and polished throttle body???

This is a discussion on Ported and polished throttle body??? within the External Engine forums, part of the LSx Technical Help Section category; I am looking into buying a ported and polished throttle body. What exactly will this do for me in horsepower ...

  1. #1
    Senior Member clg82's Avatar
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    2000 Trans Am

    Ported and polished throttle body???

    I am looking into buying a ported and polished throttle body. What exactly will this do for me in horsepower gain? Also it comes with the bump stop mod already done what does that mean?

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    Senior Member rajiv1998's Avatar
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    porting widens out the tb a little bit. Ur hp will go up by like 5, not to much, but everything helps. Bump stop is a free mod.

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    Madeche Vision...soon The Scientist's Avatar
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    Bump stop allows the tb butterfly to rotate/open to a complete 90 degrees. Look it up! There are plenty of how-tos regarding that free mod.

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    Preferred Member CWW17's Avatar
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    Black | Black
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    just get a dremel and some sandpaper and do it yourself... takes a little time and patience but itll save you anywhere from $70-100 bucks...

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    Member blackls1ta's Avatar
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    i got a ported throttle body from a guy named jon bishop from ebay he is good but its not polished it flows 350 cfm more than stock about 10 hp gain on my car i paid 130 for reman and swap my old back to him you got to pay the core 79.99 up front till he gets your old one back then they will credit you,it has wot blade, bump stop mod, everything you wud want except polished better than aftermarket ones.says its good up 2 450hp they claim.

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    Member jag42420's Avatar
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    Bump stop mod thread http://ls1tech.com/forums/showthread...hlight=writeup

    Bump stop mod how to w/ pics http://joshker99.home.comcast.net/tbmod.htm

    Good article with some porting pics and instructions http://www.gmhightechperformance.com...modifications/

    If you're pretty good with a dremel or die grinder, you can port your TB yourself and save some money. All porting really does is remove sharp edges and smooth the airflow path. If you're at all uncomfortable doing it, I'd send it out to be done. Usually a good port job will run around $100. Most people have an exchange program where they will ship a ported TB to you and you ship yours back after you change them out so you have no downtime. Usually, they do the bump stop mod too.

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    JUISSED Midnight02's Avatar
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    I had my stock TB ported and the bump stop mod performed by Vengeance Racing. For $125.00 they took it off of the car, did the porting and bump-stop mod and put it back on the car. I certainly feel like it was a worthwhile mod.

  8. #8
    I had a guy named BoWhite on LS1Tech do it and he has dyno runs showing 5-8 at the wheel gains. Look him up, he did a great job.

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    Senior Member greatwhiteZ28's Avatar
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    one of our sponsers here offers that for cheap. its new era perforance.

    it makes small HP but it really helps the TB responce more. the oinly bad thing is that our TBs are 72 mm and you can only port out to 75mm. ls1s can do bigger on stck form but then your spending 300-400 on a bbk or faast.

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    Senior Member SeVeReDiStOrTiOn's Avatar
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    Shaner does great work.. http://s2performance.net/

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    Senior Member greatwhiteZ28's Avatar
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    i heard good things about him too. no what s the difference between the s1,s2,s3 kits that he offers. you can only port an extra 3mm soo, anb his site doesnt say that much just list that he can do 3 of them.

    bad thing about him is that you have to send in your and hell give you one of his. or if you want to wait a month you can get your orig back. i polished the out dide of mine soo i like mine back

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    I got the S3 by Shaner and it definetely made a huge difference, I would highly recommend him

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    Senior Member greatwhiteZ28's Avatar
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    yes the qustion is what the diff from the s1 to the S3 ?

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    old timer blue02Z's Avatar
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    Navy Blue Metallic
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    +1 for shaner, he did mine and could def. feel a difference. s3 polished
    2002 Z28 M6, Suncoast Creations ram air, port/polish TB w/ bypass and bumpstop, heater hose mod, stainless steel long tubes, ORY w/ dual cutouts, Magnaflow, BMR SFC, UMI Torque Arm, LS7 clutch w/ drill mod, Pro 5.0 w/ Lous short stick, MSD wires, 4.10s, good maintenancehttp://www.fquick.com/blue02z

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    Senior Member greatwhiteZ28's Avatar
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    please explain

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    Senior Member SeVeReDiStOrTiOn's Avatar
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    Quote Originally Posted by greatwhiteZ28 View Post
    i heard good things about him too. no what s the difference between the s1,s2,s3 kits that he offers. you can only port an extra 3mm soo, anb his site doesnt say that much just list that he can do 3 of them.

    bad thing about him is that you have to send in your and hell give you one of his. or if you want to wait a month you can get your orig back. i polished the out dide of mine soo i like mine back
    I have the S2 and it's ported, bump stop and epoxy mod...I think the S3 is ported a little more and polished

    Actually you can order a TB and he'll send you a ported one...and then you send him your old one using the packaging he sends you. You can also keep the one you have and just eat the core charge...or like you said you cans end him yours put there's a turn around time of a few weeks.

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    Senior Member greatwhiteZ28's Avatar
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    whats the epxy mod??

    thanks

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    Senior Member greatwhiteZ28's Avatar
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    i know these aare just trottel bodies but i still would rather have one off a 30,000 mi car instead of a 100,000 car even thoe the spring just pulls back for movement. thats the only thing making so me go the other direction.

    so yours is the S2, is it polished??

  19. #19
    Senior Member greatwhiteZ28's Avatar
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    if you find out please post, thanks again, im out

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    Senior Member SeVeReDiStOrTiOn's Avatar
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    Quote Originally Posted by greatwhiteZ28 View Post
    whats the epxy mod??

    thanks
    That's what I call it...someone else might call it something different. The mod is filling that huge hole in the TB with epoxy and putting brass tubes in there to keep the passage open. Here's a pic of what i'm talkign about..left TB is modded

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