azZ06Mike

No a Fast is not worth the money when talking $ to HP conversion!! 900/15=$60.00 per HP.

Cam and labor $1500/100=$15.00
Nos set up $3000/100=$30.00
Tune $500/60=$8.34
Super charger $7500/150=$50.00

See the math don't lie

'06 Quicksilver Z06

When you already have a ported stocker, the numbers you have above get even worse and this is why it put me in somewhat of a dilemma.

In the quarter mile, it's probably not going to make much difference because much of the torque and HP gain over a ported stocker, is seen in the lower RPMs, down around 3500, where you'd be if you were driving on the street.

But the torque increase down low, would no doubt make the car more fun to drive on the street than it already is, and the street is where it spends most of it's time.

But, on the street, you have to be real selective about where you use it.

All of this pits you in that " what to do" mode.

The ported FAST runs about $1100.00 new. Painted, it's a little more, and the ported stocker vs the out of the box FAST are similar, so I'd need to go ported FAST, for it to be "worth" it.

I would not even consider the FAST branded products for the following, but the injectors at about $450.00, the fuel rails at about $250.00 and unless I installed it the install and then the retuning, keeping my stock throttle body and I'm pushing 2 grand for the setup.

While I have the dough, the money is not daunting for me, I have to ask myself if it would be well spent on the FAST.

On the one hand perhaps yes, on the other hand definitely no.

Of course I know, all of this talk, I'm still liable to end up with one. Painted machine silver. When you get down to it, mods rarely make any economic sense. A lot oftoiles you do them for no other reason than because you want them.

azZ06Mike

Very True but No is my answer and I am sticking to it!

ANGRY Z

FI or NA, worth the money... You are going to upgrade for more power later anyway. (welcome to the addiction). FAST LSXR is a surefire way to help get to the numbers you seek. And help out later when you raise your goal numbers again... And again...

adamgl

How much did you pay for your car?

$40,000 / 505 HP = $79 per HP
$60,000 / 505 HP = $118 per HP
$80,000 / 505 HP = $158 per HP

Seems like a bargain.

When you already have a cam, heads, and headers it IS worth it if you want more HP and TQ.

I'm sending my Fast out to get ported, then painted body color.

sky1

For me doing just bolt ons I would say no it is not worth the money unless you just have to have it. I bought the whole setup cause I plan on doing alot more down the road, so that is when the fast so will really shine. Instead of spending money on a ported tb then spending more money on a ported stock intake and then switching to the fast setup later. I just did it first thing.

Gering

FNBADAZ06

If I were doing just a bolt-on car, headers, FAST LSXR102, and a CAI....that's what would be on the list. The first two bolster and enhance my torque output, which in turn bumps my HP output, and the CAI to feed the cool air.I'd run my OEM tb and injectors, unless I made the switch to E85, which then requires a bigger injector at that point.

mulalleybs

42000/850+ rw I've been debating going Fast also, butt then i would have to drill into it for direct port. Would there be a gain when used with nitrous, or would it be the same gain as n/a?

FNBADAZ06

The torque boost because of the long runners, and the large plenum area for large volume of air to be supplied to the cylinders, won't change...even when you add nitrous.....the combo just compunds itself, so the gains would be identical (at minimum) to a solely N/A setup..

But, the torque boost you get with the FAST is useable at all times, and at any RPM....unlike a nitrous hit

If I were to add a NOS kit to my stock shortblock, I'd due a simple 125 shot plate system, along with a progressive controller. The cost and complexity of a direct port wouldn't be worth it for such a small shot.......300+ shot and beyond, yeah, then a direct port might make more sense.

azZ06Mike

Yes but a progressive controller on a small 125 shot is not usually warranted.

mulalleybs

I bought the car with a direct port on a ported ls7 intake with a progressive 250 shot/c16. The motor was built for 400, but I wouldn't feel comfortable running that large a shot. I'll probably just leave the ported ls7 on then.

FNBADAZ06

It's all in the details, Mike. The sooner you can bring your "boost" in (regardless of how this "boost" is produced..ie. turbo, S/C, NOS) and get it to hook, the faster you're going to accelerate from a dig. Maybe the car will only accept a 25-50 bump in HP from the shot, or 3 psi boost, at launch from a dig, before you don't have enough traction to apply the extra power.

If you're sole purpose is to roll race with spray, the details on how you apply it change.

FNBADAZ06

That's what I do......direct shot plumbing is expensive, and would add greatly to your expence when swapping to a FAST.

In your case, definetly not worth the cost when throwing the additional plumbing into the price.

My 07 Z

Id love to see your graph, my car is at CMS right now and im wondering if i should just do the fast now instead of a year or two from now

kingcobra10sec

My C6Z06 is bone stock besides a cold air intake, don't it has a tune but who knows. I am debating this intake if I have some extra money lying around or I may just wait 3 more years and get a C7Z06.

How much HP/TQ would i expect with a basically stock C6Z06 and a tune

MUKAK

i would deff check to see if the car is tuned, have them look inside your stock ls7 intake its more than likely ported, if not ported do that instead of getting FAST.. especially if u going to be betting into the c7z soon

harrykerry

I was wondering how important it was to change the tb. I was thinking about a fast intake, 90 or 102? Does the 102 do way better than the 90?

MTPZ06

On max effort NA 427 builds, the 102 TB is worth about 6-7 hp. So not important, unless you have to have that last 6-7 hp and money isn’t a big factor.