is there anyone who makes a spacer for the tbi setup like a carb spacer ?
i've been looking but can only find 2 barrel carb spacers on summit but it doesn't look like it will work on the tbi intake

 

Don't look for application specific, look for engine specific. You can also do a search for "throttle body spacers" and it'll pull up a bunch. I've been looking for one recently too, I think I'm going to go with one from trickflow because they're the only phenolic ones that I can find. I don't think they'd transfer heat into the TB as bad as an aluminum spacer.

 

i found one on ebay that i'm buying, $30

 

Look up TBI spacers for trucks... Summit has them.
POZ

Oh yeah, make sure you have clearance under the hood!

 

If you get a spacer and it doesn't have the center cut out joining the 2 bores, cut it out. You want more plenum area from a spacer. I wish I could run a taller spacer on my S10 so I could tap nitrous nozzles in it but it's a 91 and that will put the TV cable out of alignment plus put the air cleaner into my hood.

 

anyone who has installed a spcaer is it worth the money for the power you get?

 

I've heard they increase bottom end torque. Been thinking of getting one for 'da kids 91 RS. Interested to see if it's worth the money though.

I found one at jegs.com

JEGS High Performance - JEG'S TBI Fuel Injector Spacer

 

Nope. Bought a phenolic one from Summit about 5 years ago. Did nothing on bottom end, but did seem to perk up midrange. If you have clearance, you'd be better off buying a power charger. It's a device that will unshroud the injectors. Mounts betwixt air cleaner and TB. They go for about $40-45. I noticed more performance after that than I did with the spacer.

Tim sends

 

The power charger provides more air flow between the injectors and the actual throttle body bores; the TB spacer will provide either more plenum area or longer runner lengths depending on if it's the open design or the dual design (just like an intake, dual plenum for torque, single for upper RPM hp). You should really do the ultimate TBI mods (cut down the ridges, smooth up the bore lips, shave down the shafts, make the fuel regulator adjustable) and either buy the power charger, or put 2 or 3 injector pod gaskets in and buy some longer bolts. A free way to make the TBI manifold breathe better would be to take it off, cut down the divider between the bores some, and port/gasket match the runners. I don't know if anyone has done this since I haven't been into TBI performance for a while but it would be a worthwhile mod. Hopefully someone can chime in on this. I've found in my experience that a grinder and time is usually the cheapest most effective mod out there if you do your research.

 

How would removing the divider in the TBI manifold help anything ? It sounds like a real simple mod, so I'm interested in details, bad or good.

 

The power charger is not an injector spacer, it mounts betwixt the bottom of the air cleaner and the throttle body. It is basically a funnel that allows more airflow around the sides of the injectors. I haven't tried the injector pod spacer route yet.

Tim sends

 

"The power charger is not an injector spacer" Sorry about that The power charger is also a good mod, if you don't want to pay for that at least buy a non drop base air cleaner. When you take out the divider in the TBI's plenum you're basically converting it from a dual plane setup to a single plane setup. GM did everything they could to make these engines produce low RPM torque so you can definetly sacrifice some downstairs; cutting the divider will move your torque peak up in the power band helping you build some horsepower. TBI heads can flow some pretty good numbers with porting as has been proven on these boards. I don't know many people who have ported a TBI base. I have one in my garage that's drilled for either style head's so I may mess with it if I get bored.

 

The Hypertech Powercharger, will it work only with the stock air cleaner ? Anyway getting it working with an open base element ?

I'm asking since I'm looking into bying a K&N element, however I don't want to buy it more than once


I've been thinking about drilling two holes or so in the bottom of my chrome air filter bottom, and drill two holes in the TBI, and screw it down that way, to prevent it from moving around and to level it all out

 

vorgath sounds like a good plan let me know how it works out for you.

 

Ya got ANY idea how many projects I have unfinished for my babe right now ? *L* Projects that I have the parts for *L*

 

I made my own out of some Hi-Temp plastic.. 1/2 inch spacer, i made a
)( shape roughed it up a bit to get some better Automazation..However its spelled.. I noticed A huge Diffrence... as i lifted the injector pod 1/2" and raised PSI..

 

Vorgath,
The power charger will work with any air cleaner base. All it does is replace the spacer ring that GM puts there. Look up a pic on the Summit website. Imagine a mixing bowl with the bottom cut out, then you get the idea.

Tim sends

 

JEGS High Performance - Hypertech TBI Power Charger

Jegs showed up first on my browser...

Tim sends

 

I just don't see how it would work with an offset base air cleaner, which is what I have right now.


OK, does it fit UNDER .. or .. INSIDE the air cleaner ?



I believe Fast355 had one installed at one time ??
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is it possible to fit a powercharger AND a spacer? as i have a 4 inch cowl hood. Do they bolt into the same spot?

 

The spacer goes under the TBI unit, the powercharger replaces the spacer ring above the TBI, below the air cleaner. You can run both at the same time, with enough hood clearance. I no longer run either because of the Weiand's height.

 

So an offset air cleaner, with the bottom spacer "shaved off" will do the same ?

 

i've got the stock 91 formula hood and i'm wondering if i can fit a tbi spacer or the power charger or both. how tall is the power charger? if i have to choose between them, which will give me the biggest gain?

 

DM91RS has pix of that mod to the factory intake manifold, done by a neighbor of mine and then later done (by me) to one of my intakes. My neighbor sent me the pix and I sent them to DM91RS. Maybe someone can host them, reduce the size, and then link them to TGO.

The mod works as advertised -- allowing each plane (of the dual plane manifold) to draw from both TBI bores.

That said, there are two coolant channels (front, rear) that runs very close to that divider, so you will expose two small holes into the coolant area when cutting the divider out. They can be TIG welded closed and then filed smooth. So the pix shows no evidence of them because the welding and filing was already done. My neighbor alse welded his EGR feed-slots closed at the same time because he deleted the EGR from his engine (a 91 Caprice LTZ). HTH.

 

hmmm ok, didn't realize the issue with the cooling, speaking of TIG welding, I need to find a place that can repair two front wheels *L* one front spoke each, snapped cracked

 

Our TB's have a Coolant system???

 

What he said.....

 

They weren't saying the actual throttle body had cooling, they're talking about grinding out the middle of the manifold itself where the TB mounts to.

 

well i got my spacer and i put it on within 5 minutes after i found it in the doorway, it feels like it helps with acceleration a bit, but i don't know if it's just a mental thing, but for $30 i don't see why not, hood clearance is kind of an issue as my air cleaner touches the hood when it's closed, but it doesn't make it extremely hardto close the hood.

 

How tall is your spacer, any problems with the linkage, and where did you get it ?

 

it's a .5" spacer i got it from t&t performance, a seller on ebay, and i didn't have any problems with any of the linkage. it was really easy to install it literally took me about 2 minutes. although if you follow the instructions it'll probably take you more like half an hour because they tell you to disconnect everything from the tb, but i just took out the bolts and slid the spacer in under the tb with the new gasket,i left the old gasket on because it came clean off of the intake and was stuck on the bottom of the tb. they include the longer bolts and washers. evereything lined up fine and i was very pleased.

 

I put a poweraid tbi spacer on my V6 truck and it seems to add to low to middle range.