I was just wondering if someone could give me a little more information about TBI Spacers, Performance chips, or other upgrades I could do to my 305TBI. Just wondering which would be most noticable, if I could espect any change fuel milage, and costs of such upgrades. Let me know what you know! Thanks.

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1988 Firebird Formula 305 TBI, T-Tops, RED.

 

Hey man, its me Eric, the guys guestbook u signed. How u doin? Still looking for stuff to do to the car eh? TBI spacer is a good start, so is the chip. People have different opions on chips but I like my hypertech thermomaster for now. As for other little things you can start on, I would maybe try a K&N open element size 14x3 or 14x2.5 Also, maybe a 3" exaust system or headers are always nice. Work your way up to the big stuff.

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Eric Natzke
91 Firebird 305 TBI (dropping in a 355 summer of "01")
ASCD Ram Air Hood-3" custom exaust-Flowmaster 80 Series-No Cat-Edelbrock TES Headers (coated)-March Pulleys-TBI Spacer-K&N Open ELement-TransGo Shift Kit-B&M Supercooler 28,000 GVW-Hypertech Thermomaster-160 Stat-3:42 GM Gears-Auburn Posi Unit-Edlebrock Strut Tower Brace-MSD Superconducters-Accel Cap & Rotor
-Rapidfire Plugs-Pablo's Free Mods-265/50/R15 Tires-Emmison's all Gone

http://hometown.aol.com/J007Golden/index2.html

 

One of my clients, who is heavily into drag racing once told me that by far the best value in performance upgrades would come from a change in rear gearing. Your car probably has something like a 2.73 to 1 stock rear end gear ration. Switching to something like maybe a 3.73 to 1 rear gear ratio would provide a ton more thrust when accelerating. I believe installation is something best left to a professional, but the whole thing can be done for less than $500. There are trade offs like higher RPM cruising speed and poor gas milage but there are many ratios available to choose from. A set of 3.73s will definately be one of my next improvements.

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LO3 305 w/TBI
Open Element 14x3 K&N
Hypertech Thermomaster
160 Degree Thermostat
Low Temp Fan Switch
Eddlebrock Performer
Muffler (No Cat)
B&M Stage 2 Shift Kit
17"x9" ATP 5 Spoke Alloys
P 245/45 Goodyear Eagle
HP Ultra Plus Tires
Lakewood Rear Control Arms

 

I have a 1992 camaro RS with the 305 TBI and i have ran a 15.80 in the qtr with the following mods:air pump delete, hypertech thermo master chip and 160 stat, 14x3 K&N air cleaner, hypertech power coil, 3.73 auburn rear, cat eliminated, edelbrock tes headers, and a flowmaster 80 series muffler, and trans torque convertor lock up switch. I have friends who dog out my car but it was fun when I changed rears and pulled away from them ata light. If anything the rear is the first thing to do because it made a huge improvement. Good luck

 

What is this 160 stat that everyone says that they have? Also, I am not planning any huge performance upgrades for right now, a new rear is definately pushing my limit. Right now i am in College and am pressed for money. I have in my car a K&N air filter right now, what is the 14X3 and 14X2.5 that you were talking about, 91BIRD305? How would I be able to tell what i have? AS you may be able to tell, I am not too fluent with this performance stuff, so bear with me guys, I APPRECIATE YOUR HELP.

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1988 Firebird Formula 305 TBI, T-Tops, RED.
Of course ... 5-Speed

 

the 14x3 is the actual size of the element itself(filter). I think Bird was saying to get and open element air cleaner. Go to my page and look under my pics and when my hood is open u can see what im talking about. The best chip i've seen ive used ads, hypertech, and jet stage 2 was the jet one. It made the most noticable difference. I would get the gears they dont mean a whole near rear end get richmond gears only about 199 bucks plus install kit another 100 bucks. NOt that bad that will give u the most noticable difference. The open element should only cost you about 30 bucks if that. Then i would go with headers, exhaust and u can do pablo's free tbi tricks look in the tech articles. I'm getting tired and my eyes hurt i hope this helps a little.

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91 RS' TBI 305
mods:
dynomax exhaust, lakewood control arms, gutted cat, pioneer deck, tbi spacer, jet stage 2 chip, K&N four inch element and open element, accel cap and rotor, moroso plug wires, msd blaster coil, bosche +4 spark plugs. Alot more mods to come!!
visit my page http://www.geocities.com/motorcity/pit/8410

[This message has been edited by z28wiz (edited October 04, 2000).]