I own a 1988 305, and i was wondering i need to make it faster give can somone give me good ideas that are not costly to do to my car..anything will help...what type of gears,manifold,etc...

 

To be truthful... get at least a 350. I had a question like that too. Basicly I can tell you what I was told. You can go ahead and get heads, cam, intake, headders but they won't be AS efficent as they are on a 350 or larger block. I don't know how much you are lookin to spend but I wasn't trying to spend more that $2,000. I'm gonna end up buyin a block and getting it rebuilt with some of the items I wanted for my 305, intake, headers. Maybe even the cam. I might be spending only something like $1200 to $1500 now. At least I know that even with just these few things I'll have more hp and tq at the wheels then I did but not as close as with the mods for the 305. I have heard the you can get around 300hp and 320 ft pounds out of a 305 but when compaired to something like 330hp and 380 ft pounds out of a new "stock" GM Goodwrench 350 HO (about $2000) there's no real comparison.



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You put Mt. Dew in the gas tank!?!

Wow, look at it go!
1984 L69 305HO WS6 Firebird Trans Am
Current Mods[*] 2 1/2" Flowmaster cat back[*] gutted cat[*] 160 thermostat[*] all around polyurethane bushing kit from Energy Suspension[*] 3.73 Disk rear
Mods to come![*] 350 .30" SB [*] Comp Cam[*] Edelbrock RPM Proformer Package [*] 3.73 Posi Disk rear[*] Edelbrock TES headders - Yeah I like em![*] 150 lb shot Edelbrock Nitrous System[*] Edelbrock Aluminnum Signeture Series Valve covers.[*] 140 amp GM High Proformance Altnator

 

Get something like this from http://www.allchevyengines.com

350/300HP
New GM 4 bolt main 350 block (std bore size)
Cast iron GM 350 crankshaft
GM Stage 3 rods with ARP "wavelock" rod bolts
TRW Hypereutectic 9:1 flatop pistons
Crane Cams 272 hydraulic flat tappet camshaft (450 lift, 216 at 50 dur)
Heavy duty Cloyes double roller timing set
Clevite 77 bearings
High volume oil pump
Fel-Pro gaskets
New "World Products" SR heads
New 1.94" intake valves
New 1.50" exhaust valves
Screw in rocker studs
Hard seats for unleaded fuel
New valve springs
New pushrods and "self-aligning" rocker arms
New oil pan, timing cover and chrome valve covers
New GM harmonic balancer dampner
New heavy duty flexplate (standard transmission flywheel extra)
Edelbrock Performer intake manifold
Balanced, blueprinted and assembled
only $2399
--------------------------------------------------------------------------------


*Upgrades

CompCams "Magnum" rollertip rockers and guideplates $150(increases valve train stability)
GM steel crank $250 (10,10 precision ground and micro polished)
New standard trans flywheel $150
TRW forged pistons $200

 

It all depends on what you want. Is this a daily driver, if so then you will most likely want to rule out things that hurt mpg or emissions(depending on local laws). It also depends on how much money you want to spend and how long you intend on keeping the car. Don't let anyone tell you that you can't get a 305 to go fast, there is a guy on this board with a turbo or blown I forget which one that is running 11'2-12's I believe. If you stick with the 305, definately get new heads, cam, intake, I take it you have TPI. I am not familiar with the components of fuel injection so I'll let someone else answer that for you. Or if you want to spend the money you can get a new crate engine from GM, I believe you can get a 330hp 350 for $2100 from Jeg's, that includes all new block except for intake, distributor, manifolds. So basically then you should buy headers with a complete cat-back. As far as headers you get what you pay for. When I had my 305 I noticed a big improvement with the Edelbrock headers, but they rust fast unless you get them coated. Slp makes good headers that most people recommend. Then there is the choice of 3" cat-back. Pesronally I just ordered the Hooker AeroChamber cat-back, sounds good and is very free flowing. Or you could go with Borla but they are expensive. If you go with a 350 or even high hp 305, you probably want to get a new Torque converter with a higher stall speed. I am not sure what gears are stock in an 88, but I have 2:73 that I am about to have 3:73's installed. Which will hurt mpg, but I want to accelerate. You might want to choose 3:42 gears, these are the best all around gears. Do you have a T5 or 700r4 tranny. If you have a T5 I believe you would have to have it rebuilt to sustain the extra power. The 700r4 might be able to handle it I'm not sure. And with the extra HP/Torque, you will need suspesion work.
Again you have decide how much money you are going to be spending and whether or not you will keep your 305 or go with a 350.

------------------
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER, NO CAT
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter
Soon to be installed
3:73 Richmond Gears and 3" Hooker Aero Chamber
Corvette Servo & .500 boost valve
15.61@ 95.2mph G-Teched, 1-2 shift slippage
"There is nothing more addicting than speed"

 

It all depends on what you want. Is this a daily driver, if so then you will most likely want to rule out things that hurt mpg or emissions(depending on local laws). It also depends on how much money you want to spend and how long you intend on keeping the car. Don't let anyone tell you that you can't get a 305 to go fast, there is a guy on this board with a turbo or blown I forget which one that is running 11'2-12's I believe. If you stick with the 305, definately get new heads, cam, intake, I take it you have TPI. I am not familiar with the components of fuel injection so I'll let someone else answer that for you. Or if you want to spend the money you can get a new crate engine from GM, I believe you can get a 330hp 350 for $2100 from Jeg's, that includes all new block except for intake, distributor, manifolds. So basically then you should buy headers with a complete cat-back. As far as headers you get what you pay for. When I had my 305 I noticed a big improvement with the Edelbrock headers, but they rust fast unless you get them coated. Slp makes good headers that most people recommend. Then there is the choice of 3" cat-back. Pesronally I just ordered the Hooker AeroChamber cat-back, sounds good and is very free flowing. Or you could go with Borla but they are expensive. If you go with a 350 or even high hp 305, you probably want to get a new Torque converter with a higher stall speed. I am not sure what gears are stock in an 88, but I have 2:73 that I am about to have 3:73's installed. Which will hurt mpg, but I want to accelerate. You might want to choose 3:42 gears, these are the best all around gears. Do you have a T5 or 700r4 tranny. If you have a T5 I believe you would have to have it rebuilt to sustain the extra power. The 700r4 might be able to handle it I'm not sure. And with the extra HP/Torque, you will need suspesion work.
Again you have decide how much money you are going to be spending and whether or not you will keep your 305 or go with a 350.

------------------
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER, NO CAT
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter
Soon to be installed
3:73 Richmond Gears and 3" Hooker Aero Chamber
Corvette Servo & .500 boost valve
15.61@ 95.2mph G-Teched, 1-2 shift slippage
"There is nothing more addicting than speed"

 

I would like to know how to get 300hp out of a 305. Could it be done naturally asperated? Also wouldn't the 305/300hp have a better output than a 350/330hp. By the way there are 405hp 350's out there. They are rare and expensive. They are called LT5's and only came out in ZR1 corvettes made after 1993.

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************************
91 z-28 305 700R4
3.73 gears out back
T-Tops and Black all over.

 

If u have the money get this:
http://www.badasscars.com
450 HP 350: Runs on 92 octane fuel and is suitable for daily driving and weekend racing. Completely machined 4 bolt main 350 block, (bored, honed, align honed, square decked) fitted with ARP main bolts, Reground and polished crank with chamfered oil holes, Clevite 77 rod and main bearings, new cam bearings, forged TRW pistons, iron ductile rings, reconditioned rods fitted with ARP bolts, new Crower cam, new lifters, new double roller timing assembly, chrome moly push rods, ported Edelbrock aluminum Performer RPM heads, aluminum roller rockers, ported Edelbrock Victor Jr. intake manifold, new high volume oil pump and HD drive, new harmonic balancer. Comes complete with new Holley 750 carb, chrome oil pan, chrome timing cover, assembled with stainless steel bolts and Fel-Pro gaskets. Engine is fully balanced and ready to eat crate motors for lunch! $4,495.