What is the most hp you have ever seen in a worked 305??
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Member
Joined: Nov 2000
Posts: 183
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From: USA:)
What is the most hp you have ever seen in a worked 305??
I was just curious,I have heard 325hp in a magazine once!!
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86 IROC,canary yellow(originally black),fully loaded.305TPI WITH 700R4/SHIFT KIT
2:73 POSI REAR
4 WHEEL DISC BRAKES
T-TOPS
POWER LOCKS
POWER WINDOWS
TILT
CRUISE
SADDLE INTERIOR
POWER ANTENNAE
SPOILER OFF 87 IROC SO NO THIRD BRAKE LIGHT ON ROOF
16" BY 8" RIMS OFF 89 IROC
3"INCH EXHAUST WITH A 2 CHAMBER FLOWMASTER AND 3 1/2" BY 18" LONG CHROME TIPS
20% TINT ON SIDES,HATCH AND T-TOPS
GTS TAILLIGHT COVERS
AFTERMARKET FOG LIGHTS
PIONEER CD RECIEVER WITH REMOTE AND DETACHABLE FACEPLATE WITH JENSON SPEAKERS ALL AROUND
TALKING RADAR DETECTOR"BACON ALERT"
PRETTY BADASS RIDE
What I want to do..
4"inch Cowl hood.
Pacer polished rims (same style as WELD Draglites)
Custom Liscense plate like MIKSROC or MIKS 86
A couple of nice subs in the back
I am only seventeen and this is my third car(and second camaro)...former owner of 88 RED HARDTOP WITH IROC HOOD TAILLIGHTS..RIP....Long live the EIGHTIES!!!
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86 IROC,canary yellow(originally black),fully loaded.305TPI WITH 700R4/SHIFT KIT
2:73 POSI REAR
4 WHEEL DISC BRAKES
T-TOPS
POWER LOCKS
POWER WINDOWS
TILT
CRUISE
SADDLE INTERIOR
POWER ANTENNAE
SPOILER OFF 87 IROC SO NO THIRD BRAKE LIGHT ON ROOF
16" BY 8" RIMS OFF 89 IROC
3"INCH EXHAUST WITH A 2 CHAMBER FLOWMASTER AND 3 1/2" BY 18" LONG CHROME TIPS
20% TINT ON SIDES,HATCH AND T-TOPS
GTS TAILLIGHT COVERS
AFTERMARKET FOG LIGHTS
PIONEER CD RECIEVER WITH REMOTE AND DETACHABLE FACEPLATE WITH JENSON SPEAKERS ALL AROUND
TALKING RADAR DETECTOR"BACON ALERT"
PRETTY BADASS RIDE
What I want to do..
4"inch Cowl hood.
Pacer polished rims (same style as WELD Draglites)
Custom Liscense plate like MIKSROC or MIKS 86
A couple of nice subs in the back
I am only seventeen and this is my third car(and second camaro)...former owner of 88 RED HARDTOP WITH IROC HOOD TAILLIGHTS..RIP....Long live the EIGHTIES!!!
TGO Supporter
Joined: Aug 1999
Posts: 14,811
Likes: 1
From: Jackson County
saw a fellow named Wells a few years back must of been making 1200 or so out of a 305. he ran the supercharged outlaw circut around here. he was points leader in 86 or 87. ran a front (i think) engine dragster in the 7.5 et range. i'm sure it didn't have any gm parts in it and i'd guess it was a sleeved block. they always made a big point to say he was running a 305 and not a 350.
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ICON Motorsports
1st & 3rd
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ICON Motorsports
1st & 3rd
Supreme Member
Joined: Jul 1999
Posts: 1,593
Likes: 3
From: out of my mind; be back in 5 minutes....
Car: 1989 Firebird Formula
Engine: Internal Combustion
Transmission: Completed
Axle/Gears: ones that turn.
Hot Rod magazine followed the buildup of a 402-hp 305 way back when...check it out here http://www.hioutput.com/tech/400hp/400hp.html
Pete
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Pete's Place
HiOutput Tech Page
83 SC
203+k mile LG4/5-speed
14.935@94.14
Pete
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Pete's Place
HiOutput Tech Page
83 SC
203+k mile LG4/5-speed
14.935@94.14
Junior Member
Joined: Jan 2001
Posts: 83
Likes: 0
From: Abilene, Texas
Car: 1989 Formula - Red
Engine: 350 TPI
Transmission: 700 R4
Axle/Gears: 3.73 Posi
About 365 honest horsepower with ported heads and a solid roller cam.
There are only 2 problems with a 305, and they are both MAJOR.
1-SMALL BORE - Air flow is everything and the small bore limits the valve size to 1.94 MAX on the intakes. The small bore also shrouds the valve and blocks airflow when it it open. No problem at low RPM where torque is mad; BAD problem at high RPM where horsepower is made.
2-LONG STROKE - limits RPMs because of decreased volumetric efficiency above 4500. Sure, it will rev past 5k, but the cylinder is barely 3/4 full at this point and even though it is revving, it is not making any horsepower.
The guy spent a ton of $$$ on the motor & he could've built a killer 383 for the same dough.
There are only 2 problems with a 305, and they are both MAJOR.
1-SMALL BORE - Air flow is everything and the small bore limits the valve size to 1.94 MAX on the intakes. The small bore also shrouds the valve and blocks airflow when it it open. No problem at low RPM where torque is mad; BAD problem at high RPM where horsepower is made.
2-LONG STROKE - limits RPMs because of decreased volumetric efficiency above 4500. Sure, it will rev past 5k, but the cylinder is barely 3/4 full at this point and even though it is revving, it is not making any horsepower.
The guy spent a ton of $$$ on the motor & he could've built a killer 383 for the same dough.
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