TBI perf parts

[jared6180]

does anyone have a checklist of TBI performance parts or a reference manual. I really want to be carbed, but if that is to expensive I will probably stay TBI.

Thanks
Jared

[1BadZ71Tahoe]

does anyone have a checklist of TBI performance parts or a reference manual. I really want to be carbed, but if that is to expensive I will probably stay TBI.

Thanks
Jared

1. Ultimate TBI Mods (Search Performance Board)
2. Throttle Body Spacer
3. Replacement K&N filter or make your own cold air with a piece of sanitary sewer hose and a k&n cone.
4. Non Heated Performance Intake Manifold
4. Headers and full exhaust with high flow cats and straight-through design mufflers
5. Comp Cams Computer Compatible Cam of Powerband choice
6. Upgrade valve springs
7. Forged Oversize Pistons
8. Upgrade Heads and upgrade cam again to a higher powerband
9. Beef up your transmission
10. Beef up your rear end
11. Custom Tune

You'll go pretty good with that.

[billvill]

I have a k&N filter for TBI I listed today on ebay

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=200143603697&ssPageName=STRK:MESE:IT&ih=010

[kentonmiles]

Tb Spacer, Fuel Pod Spacer, Msd Stuff, 8.5 Or 8.8 Wires, Rapid Fire Delco Plugs More Than Can Type Fingers Cramping Got Too Go Too Much Info To Giv Sorry/ Google It

[PHATSPEED7x]

Jeg's makes a 350 TBI induction kit with all sorts of goods stuff for the top end of a chevy TBI motor. It's like $240

[ryan_thompson87]

One of the coolest things ive ever seen for TBI is the Edelbrock Performer EFI, it basically switches your TBI motor into a Multi-port set-up, it looks awesome, your stock TB sits on top with the pod removed, a really good idea i think

[GreaseDog]

One of the coolest things ive ever seen for TBI is the Edelbrock Performer EFI, it basically switches your TBI motor into a Multi-port set-up, it looks awesome, your stock TB sits on top with the pod removed, a really good idea i think

except nobody can get them to hold a tune. they're junk according to everyone who has run them for any amount of time.

[90C350]

The injectors on the edelbrock kit are also useless for performance. You would be cheaper and better of buying an aftermarket MPFI manifold and doing the conversion yourself. As well as performance, IF you can tune your own chips you can put anykind of cam/intake performance mods you want onto your engine. It just takes some tuning to get it running right. Good luck

[dualtbi88]

Hi, I've been working on a dual TBI setup for my truck. I've had to make a lot of upgrades to get this thing to work. I got TBIchips.com working on the chip programing. I'm using an FJO injector driver and a 255lph walbro pump. The manifold is an Offenhauser dual quad crossram. The ingine is basicly a modified ZZ4 engine with a .060 over bore and a bigger roller cam a higher compression. I know I have a lot to learn about tuning an EFI system. As of right now I just got this thing running. Sofar it has huge torque but it falls flat at just 3000rpm and begins to sputter. I let off quick and it almost stalls then slowly begins to recover. I'm still waiting on my ALDL cable so I can datalog what is happening. hopfull it'l be in before the weekend.
As of right now the fuel curve is way off and the timing is too retarded. I hope Brian at TBI chips cen get it right with the next chip burn when I send him the sensor log file.

Any of you guys have any suggestions?

[superlite]

I'm sure ya adjusted the fuel pressure to get it to run but other than that I dont know of anything off the top of my head try advancing the timing manually to see how that helps ya..like to see it running around town I live in Bayou vista

[Savage Sierra]

What heads do you have? The stock 193 un-touched probably wont process the extra fuel and air of a second TBI. The High Swirl heads are great for low end torque and power up to 4500 rpm or so, but the design would hamper performance if your feeding it to much air & fuel.

[dualtbi88]

I have ZZ4 heads which are the same as the Covette L98 heads.
The heads have been shaved and now have combustion space of 53cc's. The intake runners are an open high velocity striaght through design.
They also have D shaped exhaust ports. The cam is a crane roller cam with .479 intake lift 272 duration and .518 exhaust lift 286 duration.

I've read the EFI system has great advantages over a carborated setup.

Which is why I kept this truck fuel injected.
Since the fuel is force into the engine, it can still accelerate even at zero vacuum. You can put a huge throttle body on a small engine if it's fuel injected, the sensors meter the fuel base on air flow and fuel maps. A carborated engine has to have some vacuum to operate. Hence carb size is criticle, to small and top end will suffer, too big and the engine will bog.
Plus the caburator has to have an accelerator pump or the engine would stall at the snap of the throttle.

I tried to use a single TBI and was told even the biggest TBI system from GM could only go 300hp max. Air flow wasn't the problem, fuel was. The largest injectors are 90lbs per hour.
I needed 110lbs per hour to feed this engine. To solve this I used two TBIs. Two 350 TBI units with 55lb per hour injectors gives me the equivilant to 110lb per hour of a single unit.
I used an injector calculator to get 220lb per hour total fuel demands to feed 400hp.

I made several improvements in the system since I last wrote. I modified TBI #1 one the left by drilling a 15/64th hole into the return line to breach into the main feed passage. This alowed better flow into TBI #2 to balance fuel flow. The adjustable regulator is built into TBI #2 on the right. I'm using the same type of accumulator, pressure regulator setup as the Corvette Crossfire system.

According to the Desktop Dyno this engine should produce 470+hp at the crank. So being conservative I estemated 400hp. GM's ZZ4 engine is rated at 355hp. I'm using exactly the same block, heads, crank, and rods. The only difference is I'm running more compression, bigger cam, EFI, better intake, and some intake runner porting.

[superlite]

dualtbi so how is it running any better or what.

[dualtbi88]

Its running a lot better than it was a few days ago. I've been having spark plug fouling problems; high speed glazing. It's basicly a shorted out plug because of electro conductive fuel deposets melting on the insulator. When this happens I get a three foot long blow torch out the exhuast. Its caused by hard quick acceleration. I'm told a colder plug should stop this. As of now I'm data logging to get it tuned better. I also found that if you use an A/F guage DONOT hook it up the system O2 sensor. That will wreak havoc on the ECM. I'm learning as I go with this thing. Hopefully I'll get it dialed in soon. Then I'll publish the results along with a Dyno run.

[superlite]

right on bro if ya ever need a hand let me know if I'm not off shore I wouldn't have a problem helping out,sounds like a slick setup ya have

[dualtbi88]

It's been fun and fustrating, but I have to admitt it is pretty cool. I've been working hard to get this thing running right because my GMC Sonoma is going to need a new cluch assembly and slave cylinder. The slave cylinder is trashed and leaking fluid bad. The throwout bearing is making a lot of noise too. I figure after 150,000 miles this clutch had a good run.

The only other problem I have with my Chevy now is tires and cops. I tapped the gas a little too hard in front of a cop car disguised as a bone stock Ford Tourus. I had a little luck because I was only half a block away from Ed's muffler shop, where I was headed. I explained to the cop that my truck was running bad because of a cracked header pipe and it almost stalled when I spun the tires by accident. I was going to the muffler shop to fix it. He let me go.

[superlite]

yeah man watch out in patterson for the cops I was leaving the gym over by the popst office and I passed a cop who turned around in the PO parking to come after me for not wearing my seat belt.He stopped me and was pleasant I told him I was reaching for something that I dropped thats why I didn't have it on at first but when I seen him whip around it was on when he pulled me over,he let me go too...they are decent down here for the most part better than NY that for sure..glad to hear ya got a warning is all

[indiglo5997]

Jeg's makes a 350 TBI induction kit with all sorts of goods stuff for the top end of a chevy TBI motor. It's like $240


Just a bit more than $240 :lol:

http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_536984_-1

[dualtbi88]

Yea I like that just a bit more ($952.99)

[superlite]

they have another one thats just the intake hose and power charger(salad bowl and spacer plate and something else for 240

[superlite]

heres the part #599-CE-1502K for $240 on jegs

[dualtbi88]

man I can just smell the horse power oozing from those parts

[dualtbi88]

I can only see maybe 5ftlbs of torque increase from those parts and maybe 3hp

[94stepside5.7]

Jeg's makes a 350 TBI induction kit with all sorts of goods stuff for the top end of a chevy TBI motor. It's like $240
You do have to retune the ECM to make this kit work right?

[dualtbi88]

A person could get a lot mor bang for the buck by using that money on a set of headers and mufflers.

[dualtbi88]

You do have to retune the ECM to make this kit work right?

Maybe know with such a small increase in power and torque the ECM could compensate.

[dualtbi88]

I learned the the ECM can pompensate for small mods like mufflers and air filters; maybe even headers. But once you add a performance cam you will need a stage two or three chip.

[killa66cam]

Yea I like that just a bit more ($952.99)

Is the kit worth the money?

Cam

[ryan_thompson87]

my stock ecm compensated for everything in my sig, although i know im not getting anywhere near the full performance of the motor, chip is next on the list

[canadianstroker]

Tubo-City has a dual setup with tunning check it out.

[killa66cam]

Is the kit worth the money?

Cam

Anyone wanna answer this one for me, please!!! Thanks.

Cam

[GreaseDog]

the jegs kit is decent, the edelbrock kit supposedly sucks.

[killa66cam]

the jegs kit is decent, the edelbrock kit supposedly sucks.

Would I be better off just picking up seperate pieces myself, rather than getting this kinda kit?

Cam

[GreaseDog]

the air cleaner tubve can be done cheaper, the lid is pretty much worthless. the injector pod spacer can be had cheaper on ebay, so maybve it is worth it buyin one piece at a time.