Hey All,

Just wondering if the TBI injector spacers actually work or if they are just another scam item like the resistor chip. The item in question is this one here

http://cgi.ebay.com/ebaymotors/ws/eB...spagename=WDVW

 

I had one and could not tell a difference. I ended up taking it off because you have to adjust the TV cable. The spacer actually changed my shift points on the transmission.

 

The injector spacers actually work pretty good. Anything to increase airflow and raise the injector pod up some will help. They are not very hard to install either. It's just 3 bolts.

I wouldn't say it adds 5-10 HP like the seller claims, but it definitely helps:



It's the TB spacers that cause all the problems, especially with the TV and accelerator cables. I've seen mixed reviews on those, and it seems like they are usually too much trouble to install to really be worth it (if they even do anything).

Here's an example of the TB spacers:

 

Got the fuel injector spacer too .. from JEG's ... extremely easy install ... worth it ?... Well considering gasket may already be shot.. why not... under 20 bucks aint bad

 

indeed The injector spacers works, just by getting it higher a 570cfm TB can flow 580cfm the TB spacers on the other hand are a wast of time and money besides have you ever looked down the intake? reaseing its not going to help

 

Ok then...I am gonna order that injector spacer. I am buying another Throttle body to port larger and I will use this spacer on the new fuel pods. I want more air in there

 

This is not entirely true. TBI spacers can be used to increase plenum volume when it is needed. It can be used as a tuning method to get every last bit of flow. I would like to see some dyno data and track times of a before and after spacer install. It would have to be properly tuned though and not just slapped on and ran. I have a spacer yet I have zero quantifiable data to prove its worth. There are about four companies that make them so that in itself would tell you that someone has done some testing.

 

i read somewhere on the forums, where a guy used an extra gasket under the injector pod. i had an extra one from a rebuild kit i snatched from a buddy. i dont know if it helps. but it would seem like it would.

how tall are the spacers that jegs sells? im guessing i raised the pod about 1/4 inch.

 

Stacking injector pod gaskets will work just fine. I think it's usually not done just because it's harder to get ahold of more than 1 gasket than it is to just buy an injector spacer.

I don't have the Jegs spacer, but I bet it's 1/4" like you said. Every other injector spacer that I have seen is 1/4". I'm sure someone with the Jegs spacer will eventually chime in, though.

 

Am I like the only one who just uses the fuel injector spacer.. and no gaskets .. just the spacer ? Or am I confused here lol ... the spacer is working without the old or new gaskets


As far as TBI spacer goes ... correct me if I'm wrong.. but... yes sometimes ya may be able to find them for 35 bucks.. often they sell for close to 80 dollars .... isn't it better to just buy a taller intake manifold ... for say hmmm 120-150 bucks ? (IF you're lucky enough to find them that cheap)



Hell I'd love to be able to find an intake manifold for say 80 bucks lol .. with EGR fittings lol

 

It makes sense and General Motors put them on their 454 TBI units.

 

We were referring to stacking injector pod gaskets instead of buying an injector spacer. You are right, when you get an injector spacer, you don't need any gasket. Just a little misunderstanding, no harm done.

 

 

Tbi and Carb manifolds work on the same principle of fuel+air through a runner....

Carb spacers have worked great for years, no reason a TBI spacer wouldn't provide SOME benefit. May no be much, and it won't affect fueling (or shouldn't I will say), but there could be something to it.

 

Best you can hope for w/ a TBI spacer is to increase plenum volume and boost low end some. Claims of higher HP, or better gas mileage are not true and fluid dynamics and engine theory support this statement. Even the so called "Vortex" or "tornado" type spacers are a bunch of bull. It takes energy to "vortex" the air stream and that energy comes at the cost of reduced intake velocity (i.e worse flow). An injector spacer will boost performance and does two things 1) it raises the injectors out of the air flow path thus removing a potential air obstruction & 2) It changes the fuel cone vs throttle blade geometry which is important if you are going to install a larger bore throttle body. GM installs the injector spacer on the BBC for this reason.