TPIS 90mm lS6 intake is it still worth it?

**Blue28** · 02-27-2011, 07:35 PM

I've got a LS6 intake boxed up I've had for a few yrs, would a TPIS 90mm conversion give me a worthwhile power increase over my BBK SSI intake w/85mm ported TB, or should I just open up the BBK to accept a 90m tb, or not even waste my time?

Please, Let me know why you suggest a certain poll option.

Modification list, it's long!
SLP lid, AMS air filter, BBK ported 85mm TB, BBK intake, flow matched SVO #30 injectors, Yella Terra 6645 rockers, PAC 1521 valve springs w/titanium retainers, AFR 205's w/66c chambers and GM MLS gaskets, LS7 lifters, Comp 7.450" - 5/16"dia. PR's, ARP head Bolts, BBK Lt headers w/ORY, 5" case magnaflow 3" in/out dumped before rear axle, Kaytech manual belt tensioner, Meziere street EWP, Fluidampr10% UD crank pulley, Mast fuel rails, Vinci Performance ported oil pump w/Mikronite process, Cloyes timing chain/gear set, Racetronics in tank 255 fuel pump kit w/hot-wire, Custom CompCam 227(.614")/231(.617") 111lsa +2 cam (LSL lobes), Tick adj. clutch master cylinder, SDPC LS7 clutch kit w/aluminum flywheel, stock 10 bolt w/3.42 gears.
I've also got poly motor mounts, UMI trans mount w/TA relocation , Edelbrock adj. TA, and a full custom suspension, and a lot more.

Thanks!

**'02 WS6** · 02-28-2011, 04:05 AM

Why not sell both and buy a FAST 102?

**Blue28** · 02-28-2011, 09:27 AM

I can/could but I want to fully weigh my options first, and even if I do sell everything I'll still probably need to spend another $600 for the FAST102 w/TB and fuel rail. IMO if I can get 15rwhp more without going with the FAST, then I'll be perfectly happy, unless the FAST can give me 10rwhp more on top of that !

**shady milkman** · 02-28-2011, 09:39 AM

you want the fast intakes for this one reason.

the bbk and ls6 intake are well..based on the ls6 intake.

the new fast has better runner designs ..on top of that it can be ported and so even more promise. You want a intake that can supply enough or more air than your heads will ever need. the big this is to remember use a 102mm tb. the fast 102 with a tune will show you gains. but in order to get them most out of the 102 fast you need to have good/great heads

**shady milkman** · 02-28-2011, 09:40 AM

Originally Posted by Blue28

I can/could but I want to fully weigh my options first, and even if I do sell everything I'll still probably need to spend another $600 for the FAST102 w/TB and fuel rail. IMO if I can get 15rwhp more without going with the FAST, then I'll be perfectly happy, unless the FAST can give me 10rwhp more on top of that !

remember tho..it isnt always about peak...you will gain peak..but your power under the curve will be more impressive and your usable rpm range will increase

**'02 WS6** · 02-28-2011, 10:23 AM

Originally Posted by Blue28

I can/could but I want to fully weigh my options first, and even if I do sell everything I'll still probably need to spend another $600 for the FAST102 w/TB and fuel rail. IMO if I can get 15rwhp more without going with the FAST, then I'll be perfectly happy, unless the FAST can give me 10rwhp more on top of that !

I'm not busting balls or anything but you spent $500+ on a Meziere EWP for 10hp. Seems the FAST would be on par of an upgrade.

**Blue28** · 03-01-2011, 09:39 AM

Before I bought the EWP I understood why I was buying it. With the FAST I would like feel I made a blind, impulsive purchase, since there's so much conflicting info out there. I prefer to make a educated purchase, so I really know what I'm getting.

**'02 WS6** · 03-03-2011, 03:52 AM

I'm not sure what conflicting info you've seen, but I personally gained up to 27rwhp/21rwtq under the curve and 19rwhp/11rwtq @ peak.

If you were to sell both intakes, you'd only have to spend about $400 to get a FAST setup. Seems worthwhile to me, but to each his own.

**Deezl SS** · 03-03-2011, 05:57 AM

If you plan on leaving the car the way it is and not going any further, sell both and pickup a fast 92/92 setup. The 102 will be overkill for your current mods. If you plan on going bigger and better down the road, bite the bullet and get the 102 now. Just be honest with yourself before you make the purchase. Also, if you go with the fast 102/102, you should ditch the slp lid and get yourself a FTP 104mm lid and 100mm MAF. You don't want any bottlenecks in the intake tract......you want to be as efficent as possible. Just my .02.

**Blue28** · 03-03-2011, 09:14 AM

Originally Posted by shady milkman

remember tho..it isnt always about peak...you will gain peak..but your power under the curve will be more impressive and your usable rpm range will increase

I really could care less about peak, I'm looking for gains I can actually use in daily driving; without going WOT.

**Blue28** · 03-03-2011, 09:20 AM

Is there any real gains if I get a 85mm MAFS w/tune, with my current setup?

**Blue28** · 03-03-2011, 09:28 AM

Originally Posted by '02 WS6

I'm not sure what conflicting info you've seen, but I personally gained up to 27rwhp/21rwtq under the curve and 19rwhp/11rwtq @ peak.

If you were to sell both intakes, you'd only have to spend about $400 to get a FAST setup. Seems worthwhile to me, but to each his own.

What was your set-up before you went with the FAST, and which FAST set-up do you have now?

**'02 WS6** · 03-03-2011, 09:40 AM

Setup was a Pat G cam/TSP LS6 heads, stock LS6 intake with stock 28.8lb injectors (@ 89.5 duty cycle) stock fuel pump. 435rwhp/393rwtq

Swapped on Vengeance Racing ported FAST 92/NW 92 with same stock injectors, retuned but couldn't get aggressive because of the injector DC on the higher end. 454rwhp/404rwtq

Swapped; injectors for SVO 30#, Racetronix Fuel pump kit, 85mm MAF, and FTP 85mm lid, truck coils with heat sinks and retune. 463rwhp/409rwtq