I would like to recommend to everyone useing a 305 or 350 TBI motor to buy a Jegs TBI spacer and injector spacer. I had my doubts at first but the final results were excellent! I noticed a High gain in torque and a good hp add. I spent about $85 total on it all. It was worth it. If you have any questions dont be affraid to ask. Gregg

 

Holy crap. Are we talking about the same thing?



I got this thing for free and have seen it sold for 10 bucks. You are talking about the spacer plate, right?

 

thats right. i spent about $20 on the injector spacer witch is the one in the pic and i spent about $75 on the 1" throttle body spacer.

 

I think the TBI spacer is illegal in CA.

 

I live in Michigan so i can do just about anything i want to my engine! but if your dareing the spacers are worth it and you will notice it. im going to get my car dynoed on monday. before i had the spacers on i had 422 hp and 456 ft. lbs torque. so it will be interesting to see what happens.

 

gogo what kind of setup do you have on your camaro thats pumpin out 400+ hp. Curious because this is the tbi forum so i figured you have a lo3 or posibly a 350 tbi by some chance. Thanks for the spacer advice. Id grab one if i had a throttle body that actually worked

 

i have a crate sb 350 bored 30 over, flat top hyperutenic pistons with a compression of 11 to 1, full length headers (costom) stock crank stock cam, all roller valve train, port and pollished everything, vortech heads, edelbrock tbi intake, eletcric water pump, no a.i.r, no A.C., stock computer, no chips, open element air cleaner, 1" tbi spacer and injector spacer, 160 degree thermostat, eletcric cooling fans, 700R4 trans (new) built with performance parts, tested up to 800 hp and 1000 lb of torque. this engine took me some time.

 

wow, good results for having a mild cam and no chip work. You should plan some custom chip burning and youd really be moving.

 

I dont know if this is off topic but can someone post a pic or a link with the Edelbrock TBI intake.....I have heard about it but have yet to see a pic of it. I could not find one on the Edelbrock Web site.............

 

There is a picture of the edlebrock intake in the Intake Manifold sticky at the top of the TBI section. I'd like to know how you pulled 400 HP with that intake as well, its decent for a 305 but it doesn't seem like it would handle 400 hp.

 

I don't mean this as calling bs or anything. But those numbers are very hard to believe. What kinda cam are you running in there? I hope you don't still have 305 injectors. If you have 305 injectors and stock fuel pump there's no way those numbers could ever be reached. I would be skeptical still even if you had a 255 lph pump and 90pph injectors. Like I said though, I'm not calling bs, just prove me wrong; let us know what ya got.

 

dont forget im running a 350 cid bored .30 over. the crate engine came stock with 350 hp to begin with. hope that helps

 

i dont plan to do any chip work any time in the future. it may be considered in the next year or so but for know ill stick to what i got.

 

So you are saying you're running 305 injectors? and stock fuel pump? There's absolutely no way you're making that kind of power, sorry. That just isn't happening, especially without chip work. Maybe those injectors would give enough gas to fuel it up to about 2k rpm, that's a maybe. Some guys are running out of injector with mild 305's. Also, what are the specs on the cam? Got a printout from the dyno readings? I don't want to sound like an a$$ but I hate when people make claims like that, I just don't believe it. But, like I said, prove me wrong.

 

BronYrAur, in his mod list he says he has the stock cam .

 

the throttle body is out of a 1992 chevy 2500 series silverado truck. so it is a 350 tbi unit. and i am not shure on the cam. it came with the engine.

 

the fuel pump and regulator are somewhat stock. the pump os ment for a 350 tpi motor running 15 psi instead of the 12 to 13 the tbi needs. the regulator came is the stock one from the truck.

 

those would be 55pph injectors then and stock 1 11/16" bores. I just don't see that producing the numbers you say.

 

There is noooo way they would bust you for a spacer. I can gaurantee that one.

 

it would be a dum thing if the spacer was illegal because it helps with emissions

 

You'd probably fail a visual inspection with a spacer in Cali but its like a 5 minute job to take it off before you get it tested.

 

yea thats a good point!

 

Yeah. It's hard to see and I know the mechanic who does the inspection.



Not worried.

 

yea if i were you i would go ahead and buy the spacer and do it. it wouldnt hurt to try it out and see what you think.

 

What is the purpose of the TBI spacer. I know the injector spacer allows the injectors to sit higher which allows more of an opening for more air but what exactly does the TBI spacer allow?

 

Chassis dyno, engine dyno, desktop dyno, or WAG?

 

Chassis dyno i just had my car dynoed again yesterdeay. i only got a 8 hp increase and a 12 ft lb torque increase so it wasnt that much. but for some reason it seems like it has alot more when you drive it.

 

the TBI spacer allows the fuel to atomize better before entering the cylinders. making for a better and a more powerfull combustion.

 

So, your numbers are RWHP? You need to take that thing to the track !

 

yea i will come spring. the track closed already

 

Getting back to the original topic about the 1" TBI and injector spacer . . . the guys using these, what kind of hood clearance do you have? I've got a flat base 14"X3" open element air cleaner. The nut on the ac is already poking into the insulation on the back side of the hood. I don't think I could add a TBI spacer without maybe going to a drop base air cleaner and/or an aftermarket hood.

 

No, I think you're right, I don't see how you could add a TB spacer with a non-drop base if it's already poking the insulation.

 

I suppose a 2" tall element would gain me an inch, but that would be more restrictive to airflow and maybe negate the benefits of the tbi spacer. Don't know for sure, maybe someone using the spacer will chime in.

 

You're using a flat base open element, did you take out the gold ring that the air cleaner sat on? You don't need that with a flat base. I'm running an aftermarket intake that sits quite a bit higher and a flat base air cleaner. I run a 2" tall element. We're dealing with an LO3 here, it won't be a restriction at all.

 

I removed the collar that the stock air cleaner sat on. I'm running a 3" element with a flat base. Like I said, can't go any taller as I'm already kissing the insulation on the hood. You're probably right, I could drop down to a 2" element like you are an not suffer any airflow loss and get an extra inch of room for a TBI spacer.

 

GOGO90Camaro, I'd have to see a vido of your car on the dyno & results to beleave those #'s. give use some proof????

 

back to the air cleaner. i run the holley projection with GM 454 TB. the AC is a 3 inch drop sitting on a 1.5 inch diverter ring(?). so net drop is 1.5 inch. i clear the inj pod by 1/4 inch to bottom of top of lid. the top of AC nut clears the hood by barely 1/4 inch. i needed to use a 14x2 round KN. think that is enough air flow to feed. just ran engine today to break in cam. not yet winaldl.

 

A 14x2 air cleaner is more than enough to feed a TBI car. People just go with 14x3's since they are more proportional and a pretty much standard universal automotive part.

 

Is this the basic scenario? He bought a crate engine with 350 HP and now it's doing 800?

 

As far I read this he bought a crate motor that came with 350HP and he's tinkerd with it a little and got it nearer or over 400Hp.
My summit catalouge shows crate motors coming with that, then you just add the your intake and fuel system. HEY DUDE did you do the install yourself? If he paid someone else to do it I'd assume they'd take care of the fuel pump issue and injectors.

So What anyway! maybe he's some 15 yearold kid from kansas dreaming he has 400 HP.
I wish I could dream my car had just 250Hp and looked shiny but the harsh reality of it breaks through and craps on the dream.

Hey CADDY looked over your carsite domain thingy congrats on the trophy . you pumped serious $ into that 'bird no wonder it looks so sweet. He said his tranny was tested to 800hp.

 

I find it unlikely that that setup would produce 400+ hp and 450+ ft-lbs of torque with a stock cam. The vortecs are good heads but the cams torque band just wont allow for any substantial ammount of power as it peaks so low. Also perplexed as to how you got 11:1 CR with flat tops and standard 350 heads. Did you shave them? How was teh block set up? I also wouldnt want 11:1 CR with a stock cam. It definatly doesnt have trouble building cylinder pressure like a hot hi-po cam would. Not trying to be mean but it all sounds a bit blue sky

Anyway, for all the agrivation that can come with raising the tbi Id sooner go with a good 50 state legal intake with egr provisions, although I dont know if the smog ***** would allow the use of a carb intake with an efi system. Unlike the spacer, though, the intake will do more then just add extra plenum volume.