fast intake vs ls6 $$?
https://ls1tech.com/forums/generatio...6-intakes.html
https://ls1tech.com/forums/generatio...-90mm-ls6.html
https://ls1tech.com/forums/generatio...take-pics.html
https://ls1tech.com/forums/cadillac-...s6-intake.html
https://ls1tech.com/forums/generatio...-intake-4.html
Ive been including that additional porting work/reshaping in all the 102's I have ported since then which is going back a good 18 months or so at this point. This is the type of R&D I referenced in my earlier posts and this just adds to the stupid hours I had already invested in these previously.
Guys....regarding the 90mm TPIS upgrade.....you cant just put a big opening on a stock LS6 intake and expect it to kick azz. The problem is inherent in all the design compromises GM made originally in the plenum and the runner entrance, runner cross section, and shape....all the real meat and potato's of manifold design cant be addressed and you cant open the LS6 intake and take out the grinder to do anything about it. A stock FAST will make more power.....a properly modified FAST will make alot more power. Its just a better designed piece that was designed with performance in mind at the inception of the manifold....its apples and oranges in some respects.
-Tony
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Joined: Jun 2013
Posts: 7
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From: Brisbane Australia
Hi Tony since we are on the topic, what's the best to do with the Ls2 heads, they are meant to be getting CNC ported here which seems best price wise, but what are your recommendations? Yes and bigger TB sounds like the go but it's the $800 extra they want for it lol
Main difference is the straight shot at the port and the perfect angle approaching it....not to mention the generous radiused bellmouths around each runner (which I tweak a little better with the ported versions). Also, the plenum is more ideal....it's much larger so there is more air to draw from.
I can look down the runner of a ported LSXRT and see the back of the intake valve if its installed on the head....no exaggeration.
Look at this thing....seeing it on the engine with the big ole bonnet removed gives you a better understanding of why its so kick azz! (note this intake is not ported yet)
It doesn't get much better than that honestly....
I can look down the runner of a ported LSXRT and see the back of the intake valve if its installed on the head....no exaggeration.
Look at this thing....seeing it on the engine with the big ole bonnet removed gives you a better understanding of why its so kick azz! (note this intake is not ported yet)
It doesn't get much better than that honestly....
All I have to say is......why do the trucks get all the fun! Ok, I bet it would fit a muscle car as well.
Certainly not a C5....damn it!
Glad you commented on the TPIS mod to the LS6 intake. I get real tired of seeing "ported LS6 intake" because, what the hell can you port? You can't take it apart. Maybe port match...nothing more.
I took my 102 apart, set the base on the engine, located it and marked the ports for matching to the AFR 205 heads. I have to say, the 102 isn't cast all that accurately......
Ron
Last edited by RonSSNova; Jun 30, 2013 at 02:12 AM.
Hi Tony since we are on the topic, what's the best to do with the Ls2 heads, they are meant to be getting CNC ported here which seems best price wise, but what are your recommendations? Yes and bigger TB sounds like the go but it's the $800 extra they want for it lol
Ported stock castings have so many limitations....Ive posted volumes on this stuff years ago....search is your friend like I mentioned in my first response to you....LOL
I know there are some dealers in your neck of the woods that sell AFR....spend the extra coin....its well worth it.
-Tony
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now if only the 102 would fit under the C5 cowl without cutting up the cowl and lowering the engine....Because I don't want to do that I am stuck with having to go with a ported 92.
TECH Fanatic
Joined: Jun 2011
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From: Katy, TX
the standard 102 (LSXR) will fit in a C5, its the truck version 102 (LSXRT) that won't fit.
Registered User
Joined: Jun 2013
Posts: 7
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From: Brisbane Australia
Hi everyone,
Wondering if anyone can help me, so I'm getting a 232/234 cam in my Ls2, and getting heads ported too along worth the FAST 102 intake and 102 Tb,
Question is will I need bigger injectors on this setup? Obviously I want the car to perform well so just thought I'd ask if they need upgrading, and maybe fuel pump too?
Thanks appreciate your replies
Wondering if anyone can help me, so I'm getting a 232/234 cam in my Ls2, and getting heads ported too along worth the FAST 102 intake and 102 Tb,
Question is will I need bigger injectors on this setup? Obviously I want the car to perform well so just thought I'd ask if they need upgrading, and maybe fuel pump too?
Thanks appreciate your replies
Last edited by Carwyn Gerard Butler; Jul 7, 2013 at 06:14 AM.