Beast96Z

iTrader: (21)

Seeings how I think I'm the first consumer to have one of these at my house, I'll go ahead and tell you, THE STOCK THROTTLE BODY WILL NOT FIT. The 90mm hole is almost bigger than the throttle body. Anyway you try to configure it, there is a gap, not to mention the bolt holes are no where near close. Other than that it looks good, but for now it is a $900 paper weight. If I have to spend $1200 for a throttle body, I'll be severly pissed, since I was told the stock throttle body WOULD bolt up. Not to mention you need a 90mm throttle body gasket.

jmX

Yup, this is why im not sure why the 90mm's even shipped yet! I had the chance to buy a 90mm, but passed on it for now for the exact reason you are stating.

I'm sure i'll be picking one up as soon as a TB that actually fits is available. I think the price for the TB is around $400, but they are still a week out. The C5 TB's are a long way out apparenty.

Nobody has figured out if a BBK 85mm TB fits the new intake...maybe see if somebody local has one that you can try, without the neckdown adapter plate. That would be good info to have!

Country Boy

iTrader: (24)

Its ~$500 for the TB... Its on Thunders site.

Damian

iTrader: (89)

Considering the intake is already ~800 bucks, thats 1300 dollars....

Mind as well buy a custom sheet metal intake for that kinda money

Beast96Z

iTrader: (21)

Sorry about hte $1200 part. I thought I saw something like that in the other post. Actual price is $479. Makes me feel better, but I'm still agrivated cause I was told the stocker would work until the TB's came out.

Camaroholic

iTrader: (1)

I personally would go on Ebay, find a 95mm Holley Throttle body, and try to make an adapter plate (1/4" steel or 3/8" aluminum, a cutting tool, and a drill would be all you'd need...). "Buy it Now" for $199. I think for $250 savings, it's worth a shot... if it doesn't work out... back to Ebay it goes...

There are 2 Holley 95mm TB's on there right now. Don't know if they'll work with the LS1 cable linkage, but it's almost worth a shot.

Beast96Z

iTrader: (21)

It's already tight enough with the TNT power coupler, so there is no room for another adaptor. I'll pay the $500, just wish they would hurry since false claims were made.

Country Boy

iTrader: (24)

Yep! Typical LS1 parts. People think we're millionares driving these things.

Beast96Z

iTrader: (21)

Only thing about a Sheet metal intake is that the cheapest one I have seen is $1800. Then you have to buy fuel rails, throttle body, this and that. Not to mention they only make power from 5500 rpm's up. The FAST's are showing good gains all around.

Scalpel

iTrader: (4)

To add to Beast96Z, no heat soak either with the FAST.

Nine Ball

iTrader: (38)

Yep, I verified tonight that the stock t-body would not fit on a 90mm. The holes aren't even close. Looks like FAST is going to use a 5-bolt t-body seeing as how there were 5 mounting holes on both sized intakes.

I'd go to a machine shop and have them build an adapter plate and just use some RTV to seal it. Should work temporarily.

You can always shorten the airbox lid snout to accommodate the spacer/adapter depth.

Tony

LawmanSS

iTrader: (19)

My question is this:

Would the possible benefits of going with the 90mm intake/tb be negated by the fact that the airbox lid exit is 75mm (or 85mm TSP)?

WhiteDiamond

ABSOLUTELY! The weakest link, so to say, will always be your limiting factor. If the airbox exit is 75mm, then you would have to increase the velocity of air through that section above the velocity through the 90mm TB to get the same volume of air. Since this is highly unlikely, you have a 75mm restriction.

Todd

LawmanSS

iTrader: (19)

I don't quite have the grasp on this subject that some others do, but I can't see any point in spending the extra cash on a 90mm tb/intake setup for ANY CID engine until there is a 90mm lid and 90mm MAF available...

verbs

The 90mm lid/tb allow you to get an 85mm overall setup using an 85mm maf and lid.

Still a lot better than stock.

Pro Stock John

iTrader: (34)

I don't follow the logic of mentioning a sheetmetal intake.

If you had a sheetmetal intake you would still need a bigger throttlebody.

ONEBADWS6

iTrader: (22)

Not to mention sheet metal intakes are junk. I flowed my heads with one, over a LS6 it was worth 4cfm. For all the power you looze down low, and the heat soak forget it.

P Mack

iTrader: (6)

It's not so much that the velocity won't speed up through the 75 mm section. The air will speed up, but this faster moving air will loose more energy from friction, and therefore be at a lower pressure when it is slowed back down in the plenum. And obviously you want high pressure air in the plenum.

Someone had a huge maf in the FI section a while ago. It was like 100mm or something. I'd like to see what one of those things would do with this intake.

2000Firehawk

iTrader: (248)

2005 Corvette LS2 engine has a better flowing intake manifold than the LS6, with a 90mm TB and a 85mm MAF... go figure...

Let's hope this new LS2 intake with 90mm TB will bolt on an LS1...

Dave

WhiteDiamond

My comment is not intended to make one think that the velocity will increase at all. The comment is based in simple physics of velocity/volume of a fluid entering a pipe. The volume that goes in is the volume that comes out, if the diameter changes the velocity will change. Since the volume will NOT change in the induction tract, the velocity at the 75mm opening will be faster than at the 90mm TB. The air will be moving slower at this point and possibly more turbulent. It definately won't equal what a full 90mm induction tract could flow.

Todd