which heads TW G2 or TW 23*?
Thread Starter
Senior Member
Joined: Oct 2000
Posts: 637
Likes: 0
From: Littleton, CO
Car: 85 Z28
Engine: 305 TPI (dead) -> building 355
Transmission: 27 spline 700R4 (another one died) -> T5 goin in next
which heads TW G2 or TW 23*?
I am thinking about putting in new heads and a cam in my 305 TPI. I don't know which heads or cam to use. I have heard some bad things about the G2 with our cars, but the guy at the speed shop says the G2's are better and cheaper.
I don't know about a cam either, i don't even know where to start.
My future(long time from now) plans are to swap in a 350 and put the heads and cam on the new engine.
Thanks,
Jesse
------------------
85 Z28, 305 TPI A4
pretty stock with MSD and a few other toys
15.2@91mph
http://photos.yahoo.com/j_hougnon
I don't know about a cam either, i don't even know where to start.
My future(long time from now) plans are to swap in a 350 and put the heads and cam on the new engine.
Thanks,
Jesse
------------------
85 Z28, 305 TPI A4
pretty stock with MSD and a few other toys
15.2@91mph
http://photos.yahoo.com/j_hougnon
Supreme Member
iTrader: (1)
Joined: Feb 2000
Posts: 2,361
Likes: 1
From: Savannah, GA
Car: 1997 Jeep Wrangler
Engine: 4.0L
Transmission: 5 speed
Axle/Gears: 8.8 rear, 4.56 gears, 4:1 transfer
Neither head will work on your 305. The problem is the 2.02" valves will hit the SMALL bore of the 305. They were intended for the larger bore of the 350.
You don't have many choices for heads except the World Products "SR" head.
"SR" stands for stock replacement so why bother? If you are going in with a 350 just wait till then to get heads.
------------------
86 Camaro Sport
383 Speed-O-Motive Crate Engine, Trick Flow Twisted Wedge G2's, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Dynomax Cat-back, Serpentine Belt Setup, Dual IROC Fans, Jamex springs, 16" IROC Rims, 36mm/24mm Sway Bars, Global West Steering Brace. Hotchkis Rear LCA's,Panhard Bar and SFC's.
My Camaro Project
You don't have many choices for heads except the World Products "SR" head.
"SR" stands for stock replacement so why bother? If you are going in with a 350 just wait till then to get heads.
------------------
86 Camaro Sport
383 Speed-O-Motive Crate Engine, Trick Flow Twisted Wedge G2's, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Dynomax Cat-back, Serpentine Belt Setup, Dual IROC Fans, Jamex springs, 16" IROC Rims, 36mm/24mm Sway Bars, Global West Steering Brace. Hotchkis Rear LCA's,Panhard Bar and SFC's.
My Camaro Project
Senior Member
Joined: Jun 2000
Posts: 599
Likes: 0
From: Glenbeulah, WI
Car: 1988 Firbird
Engine: 406
Transmission: T-56
Axle/Gears: 4.10
The above answer is correct. Neither of the above mentioned heads will fit a 305 but their are some other performance heads that will. The L98 Corvette alum heads will fit a 305 and the trick flow G1 head will fit a 305. The G1 still has 2.02, 1.60 vavles but the valves are rotated and will clear the bore on a 305.
------------------
1988 Formula 5L/5sp 3.45 gears, SLP cold air kit, MAS gutted, TPIS air foil, TPIS AFPR, MAC headers, Mac under drive pulleys, MAC cat back, Relocated MAT.
Best ET street tires 13.85
Best 60 FT street tires 1.930
Best MPH street tires 99.29
------------------
1988 Formula 5L/5sp 3.45 gears, SLP cold air kit, MAS gutted, TPIS air foil, TPIS AFPR, MAC headers, Mac under drive pulleys, MAC cat back, Relocated MAT.
Best ET street tires 13.85
Best 60 FT street tires 1.930
Best MPH street tires 99.29