Cadillac CTS-V 2004-2007 (Gen I) The Caddy with an Attitude...

My TPIS 90mm conversion with pics

Old 03-08-2011, 09:58 PM
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Default My TPIS 90mm conversion with pics

To make a long story short what started out as just replacing my radiator turned out to be some modding. since i had drained the coolant from the engine i decided to go ahead and order me a 160 degree t-stat.....and since i was getting a t-stat i figured i'd get a lpe cai too......along with an ls2 tb and the ls6 to ls2 tb harness. then i sent my ls6 intake to TPIS so they could cut off the ls6 snout and put a 90mm snout. Anyways, i got it all back together tonite! finally after 4 weeks!

















Old 03-08-2011, 10:05 PM
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Looks great, but i have to wonder for the money spent(id imagine it wasnt cheap) how much you really gained over just porting the ls6 TB. Especially if you dont have forced induction or a high demand heads/cam setup.
Old 03-08-2011, 10:10 PM
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i spent around $600 for just the conversion intake, tb harness and the ls2 tb. but i sold some stuff i had laying around for $800 so it was kinda free.
Old 03-08-2011, 10:12 PM
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Originally Posted by A-Bomb
i spent around $600 for just the conversion intake, tb harness and the ls2 tb. but i sold some stuff i had laying around for $800 so it was kinda free.
cant beat free haha.
Old 03-08-2011, 10:16 PM
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im thinking of sending the tb to get p&p and then go get it tuned.
Old 03-08-2011, 10:37 PM
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Any idea how much new power from the new intake and tb? Looks good!
Old 03-08-2011, 10:45 PM
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they must be gettin better at that conversion, last intake i saw had a bunch of epoxy on the snout, this one looks clean...
Old 03-08-2011, 10:50 PM
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Originally Posted by chitown21y
Any idea how much new power from the new intake and tb? Looks good!
my guess with a tune is 10, doing a ported ls6 TB would be 5-7.
Old 03-08-2011, 10:51 PM
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Originally Posted by chitown21y
Any idea how much new power from the new intake and tb? Looks good!
i never dyno'd my car before the mods so i guess we'll see in a couple of weeks. im hoping for the best! lol
Old 03-12-2011, 01:25 PM
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Looks great but the stock intake pipe needs to go.
Old 03-12-2011, 01:56 PM
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I went with the lingenfelter cai so I had to reuse the stock intake pipe. Not to mention I had to drill a hole on the intake pipe for the hose that leads to the valve cover.
Old 03-12-2011, 04:02 PM
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I can help you with a new tube. Save up for the LPE MAF and get one of these made... not trying to jack your thread just give you options.



Well worth the intake and throttle body mod and would do it again.

Thanks to StageUp and our first fuel line fabrication and tune.

Last edited by VeryWhiteDevil; 03-13-2011 at 12:05 AM.
Old 03-12-2011, 04:05 PM
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Originally Posted by A-Bomb
i spent around $600 for just the conversion intake, tb harness and the ls2 tb. but i sold some stuff i had laying around for $800 so it was kinda free.
You should look into putting those FRCs on layaway to cover the rest of that up since you are so cheap, lol.
Old 03-13-2011, 12:05 AM
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For 600 bucks wouldn't it just be better to find a used FAST on here for around 900? Looks good but thats a lot of money.
Old 03-13-2011, 09:27 AM
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Originally Posted by GhettoTy
For 600 bucks wouldn't it just be better to find a used FAST on here for around 900? Looks good but thats a lot of money.
Mot definetly, you can pick up a FAST 90 for 700 all day long.
Old 03-13-2011, 10:04 AM
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I did look around for a fast 90 but couldn't find one so I said **** it and went this route instead. We'll see in a couple of weeks if it was worth it when I go to get it tuned, I'm now waiting on my p&p tb to get here. I can tell a big difference when I floor it. I didn't want to spend too much cause I'm gonna be getting rid of the car in a year or so.
Old 03-13-2011, 10:36 AM
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Yea and ive seen lately that used FAST's are hit or miss as a lot of people selling used are selling them as MINT conditon and peeople are finding them cracked and warped. When its time im just gonna buy a new 102 for my 93 coupe.
Old 03-13-2011, 10:53 AM
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Originally Posted by itsslow98
Yea and ive seen lately that used FAST's are hit or miss as a lot of people selling used are selling them as MINT conditon and peeople are finding them cracked and warped. When its time im just gonna buy a new 102 for my 93 coupe.
That's true. I did alot of research on this over on the corvette forum. Alot of guys have gone this route with success. I did read that the fast 90 would leak and crack.
Old 03-14-2011, 09:50 PM
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Originally Posted by itsslow98
Yea and ive seen lately that used FAST's are hit or miss as a lot of people selling used are selling them as MINT conditon and peeople are finding them cracked and warped. When its time im just gonna buy a new 102 for my 93 coupe.
You hit the nail on the head with that one. Stripped insert, cracked snout, over-ported #2, 5 & 7. I have spent two weeks fixing my used purchase. Wasn't worth it. 150 more could have got me a new 102 and TB.
Old 03-15-2011, 04:16 PM
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Im sure you will notice some power. I noticed a nice bit when i opened my ls6 mouth to 85mm and added a ported 85mm tb. on my old setup.

Almost went tpis route till i found fast 78 used for 500 sold my 85mmls6 for 350 then ported the fast and opened it up to 85 and felt a nice difference again.

Unless you have heads id say the ls6 is the way to go. The only thing really restricting it was the small mouth 78mm mouth it still was able to outflow the ls2 90mm

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