I bought a used intake and it doesn't have anything but fast and Wilson on it.It is supposed to be a 92.How do I tell if it really is?

 

If those names are cast into the plastic, they're likely the real deal. And being Wilson is part of the name, it's an old one. Nowadays I believe only FAST is cast into it.

 

Thanks, you alway's jump right in when I need help.I don't see anything that tells what size it is.

 

Ya could be fake, ill buy it off ya. how much you want?

 

I believe the old Fast 78 (and possibly the 90) didn't have the numbers on them.

 

As HCI said. The 92 should be on the intake. If not just measure the intake/TB port to see what you got.

 

You've either got the FAST 78 or Fast 90. Below was taken from another post, but it explains how to identify them. Or just measure the opening.

"The fast 78 uses the stock style 3 bolt throttle body. The 90 and 92 use the 4 bolt throttle body. And the 92 will say 92mm beside the lettering FAST on the top of the manifold."

 

It is a 4 bolt and a fast but it don't have 90 or 92 on it.

 

If its 4 bolt..lts a 90. i also have a 90.. and there are no numbers beside the FAST like there would be for a 92.

 

Ok thanks.It has a 92 big mouth tb on it.I will figure out what injectors and fuel rail to put on it .

 

I just bought one from Texas Speed and it has FAST 92mm and Wilson on it. The production date on the box is 9/17.

 

fast 90/92 can use stock rails

 

They’re a nice intake for their purpose

 

Wow good info here... I bought a FAST intake/NW throttle body combo late last season and installed it... "Wilson" is cast into the manifold so I knew it was older but it was marketed to me as a 92mm combo. There is no 92mm stamped into the casting... Must be a 90mm then.. that sucks, especially since I bought a 92mm plate for it... maybe explains why it sounds like a shop vac is under my hood constantly... I checked and re-checked the manifold for leaks couldn't find any...maybe it's at the plate! Fuel trims seem to be fine at idle but at WOT it goes pig rich.

 

Yeah, I'd probably check at the plate. The only time mine gave me issues was last year when I needed to get a new intake manifold seal that goes between the upper and lower shell. Not sure if you took it completely apart to check, but mine had become worn down over the yrs even though at first glance it looked pretty good. Also you can try checking the seal on the bottom of your MAP sensor to make sure that it is good and that you are getting a good seal and reading from the sensor. When logging my reading was a little off so I went ahead replaced that little $4 MAP seal at the same time.

 

Fast intakes are loud. Also, bigger TBs IAC port holes sound like a vacuum cleaner when they are open. The solution is to limit the air going through them. Crack the blade just a hair so less air is required through the IAC port. If they are loud all the time its way off. If its loud at crank up but quiets as the engine warms its close.

 

So is the fast 90mm a good intake or is the 92 a lot bettter intake when u compare the two if all things were equal?

 

Thanks for the info, when the car is back up and running in a month or two from all the changes, I'll look more into it. Maybe that's all it is.

 

Yep, its actually super common. You can tell cars with the blade slammed shut and all the idle air going through IAC, they are god awful loud. Almost hurts your ears.