I Fly Low

I'm researching upgrading to a FAST 102 intake manifold. Not sure I can afford both the manifold and the throttle body. Can a 102 manifold be used with the stock throttle body?
Also can a 102 TB be used with the stock manifold?

Is there a benefit to one over the other? I plan to upgrade the TB eventually.

clearwaterms

why not wait and save up, or buy one and then when you have the other install them at the same time?

Flyr282

The stock TB should bolt up to the Fast102, the 102TB won't be able to bolt up to the stock manifold.
I know this is true about the LS7, I'm not sure about the LS2/3
I upgraded both at the same time on my car and I would recommend the same. That way you can tune it once and be done. The TB mapping has to change with the 102 TB. You'll see better gains if your retuned when you modify it.

deadsexyii

FAST 102 & NW 102 TB owner here. Unless you're trying to hit a very specific HP #, I wouldn't waste the $. You can get better gains by spending that $ in other areas. If I was going to do it over again, I would just port the stock TB and be done with it, and sink the $ into something else. Cam, heads, etc.

Suns_PSD

The Fast intakes don't make any more power on the LS3 engines. Don't spend the money.

My local shop said they dynod and saw where the Fast lost hp!

OP, what does your car have now in the way of mods?

Cherokee Nation

The 102 TB will bolt to the stock manifold with the adapted.

I Fly Low

No mods yet. I have a B&B Fusion axle back exhaust waiting to be installed.

I Fly Low

Thanks for the info. I don't have a target HP, ust looking for a small gain without digging too deep into the engine. I had always heard that intake manifolds were the biggest bang for the buck.

deadsexyii

You will get far more bang for your buck by putting headers and a tune in than with intake and TB.

Suns_PSD

I think what people mean is a CAI is the best bang for the buck, and it is for sure. As in an aftermarket air filter air box. (about 20 hp) A tune would be #2 on that list (about 15 hp), A cam would me #3 (about 35 hp), Some take off LS7 manifolds combined with a Dr. G X pipe would probably be a close #4 (about 22 hp). Headers instead of the LS7 manifolds would probably be #5.(about 25 hp)

Ideally you would do the hard parts all at once and then get custom tuned. It's fine to add a CAI w/o tuning but if you start combining that with other air flow mods it's best to get tuned ASAP. The C6 is a learning computer however so if you say add just an airbox, you can disconnect your battery for an hour, then drive the car nice for 50-100 miles and the computer will be able to deal with the additional air flow of an intake no problem.

Ps. I have a barely used Callaway CAI for sale in Austin BTW that includes the precut radiator shroud, $300 plus shipping.

I Fly Low

Thanks, that was my next question: If not intake, what do you recommend? I'll keep researching.

I Fly Low

Thanks for taking the time. All good info, and I will definitely look into all of it. I'm currently deployed, so I have plenty of internet time, but no access to the car! I may be interested in that CAI. I will PM you if so.