xKittenWhispers

Hello everyone, been lurking around here for a little while now but finally got around to making and account.

I recently received a fast 102 intake manifold in exchange for some work. Since then I have been trying to find out if there would be any benefit to installing it on my stock LS1. So far all I have found is a little talk of the increased runner lengths being beneficial, before the thread turns into the argument of cost vs return. Engine is completely stock minus block huggers (swapped into a datsun will run custom headers later on down the road) 110,000 miles. Either way the car will be getting tuned before it runs again to have removed systems delted and dialed in before getting beaten on, on the autox and road courses. What I'm trying to find out is:

1.) if there is any benefit to installing it now.
2.) If there is should I run either a 90mm throttle body or 102mm or use the stock ls1 throttle body?
3.) Would the larger intake make the car less responsive to throttle input on the stock engine?

The main propose behind the car is to start with a solid base and develope the rest of the car as I develope as a driver. So things such as a heads and a cam won't come around for another year or two.

Thank you for any help you can throw my way, John

Darth_V8r

iTrader: (4)

I think there is a benefit even on a stock motor. Then, as you do mods over time, the intake will allow your future mods to make more power

JakeFusion

iTrader: (7)

I think you could sell it for $800+ and use that money on other go-fast parts that will make a bigger difference. A cam will make a bigger difference than anything else. A complete cam kit would be in that $700-800 range. So you could get ahead by doing that. Of course a tune would be in the $550 range.

01ssreda4

iTrader: (96)

Id keep it and run a 90mm TB on it.

bbond105

Install it along with a 90 or 92mm TB.

Darth_V8r

iTrader: (4)

I disagree here. Because then the intake is holding the cam back.

Install the fast, then if you don't have long tubes, do them next. Then, save up for a cam. It'll run much better vs camming and then feeling like you "have" to do other mods to help the cam.

Not to mention having to buy a fast you already had in your possession

redbird555

iTrader: (14)

Install it. It will help you out now and gain more later with more mods. I was I the same boat as you once, sold the intake to put a cam in then later ended up buying one anyway

I will play devils advocate though and say get a 102mm tb as well. With a good tuner a 102 is easily tuned I gained 6whp when I had my fast 102 intake simply by changing the 90mm tb I had to a 102tb it did have a cam though

kinglt-1

iTrader: (26)

Install it...

JakeFusion

iTrader: (7)

I wouldn't buy a FAST if I were to do it again. It's a giant POS. I'm pissed I sold off my LS6.

The cam could make 50-60rwhp more right now. The FAST will add 10. And maybe 20 with the cam AND heads.

So if I were starting to mod my car over, the FAST is the last thing I'd ever put on the car.

If I had a FAST in my possession and didn't want to spend more right now to go faster, the cam is the better bang for the buck. Even $3000 heads won't do as much as a decent sized cam.

Oh and cams can affect drivability? The FAST affects drivability more than even a giant cam from my own personal experience.

So count me as a non-fan of the overpriced, poorly constructed, garbage that is the FAST.

Darth_V8r

iTrader: (4)

This is very true. The best head designers will tell you straight up that in a H/C package, the overwhelming majority of the power comes from the cam, not the heads. And if they won't admit that, move on.

landstuhltaylor

iTrader: (6)

I recently ran a similar question by Mamo. At least on a bolt-on car it should still pick up some power everywhere over an LS6. Enough to make it worth it for some applications.

Definitely better places to put the funds if you aren't limited by a rulebook though.

big hammer

So much better intake than a POS ls6

Mappinsj

JackFusion is not wrong here. ONE fast intake for a little bit of horsepower. But I think a lot depends if his LS1 in his car came with an ls6 intake. IMO, if the car currently has an LS6 intake, I would sell the fast and get a cam kit. I mean **** dollar for dollar the FAST is not going to win. If you have lots of money and will eventually want a bigger intake and you have the money for all the things you want, keep it.

Bang for buck here, JakeFusion has a good point.

thunderstruck507

iTrader: (18)

I can see both sides here.

Not sure what a "used" Fast sells for these days but I am not sure he could get over $800 since new ones are around $900 or less if on sale.

What sucks is the high cost of a tb needed to use it. Everyone thinks their 90mm tb are worth their weight in gold. If you can find a good tb for under $200 I'd vote run the intake.

If you can't find a good deal on a 90mm tb then I'd be in the sell it and put the money towards something else camp.

It says you have a ls1 engine but doesn't way what year or what current intake you have. If you have a ls1 intake the Fast will be worth some noticeable power. If you already have the ls6 intake you will still gain some but not much on the stock cam.

Jtm2085

iTrader: (1)

Don't discount WARR performance tb's. They are extremely cheap and work well

thunderstruck507

iTrader: (18)

Not really familiar with them. I got my 92mm from Ballistic Speed right before they went out of business and it is great.

kinglt-1

iTrader: (26)

Sorry to hear this ....Sounds like you are getting pretty frustrated with your setup judging by all the back and fourth posts on changing setups and then this post. Just a suggestion but have you thought about taking the car to Geoff Skinner and getting it tuned?

john stewart

Just pulled the trigger on a fast 102 , going to do a back to back dyno test on full bolton ls1. Ls6 vs ported fast 102, same everything tb injectors and same day.
Wont be for a few months as the car is still in storage and needs some work.

Jtm2085

iTrader: (1)

Why limit the 102 intake with a stock throttle body? Who is porting the intake?

john stewart

Well the stock tb flows like 750cfm more than enough for a stock 346 @ 6250.
When i go heads and cam next year i will go bigger tb. I will be porting the intake myself, i have ported many heads using a flow bench for results.
Now i am no Tony Mamo but i can do ok.