Heads to big???
01-28-2007, 10:59 AM
#1
TECH Regular
Thread Starter
iTrader: (4)
Join Date: Jan 2004
Posts: 474
Likes: 0
Received 0 Likes
on
0 Posts
Heads to big??? Ok, i bought some heads for my car. i have a 346LS1 the heads are 241s but made for a 408. has 2.08 intakes and 1.60s exhaust. intake runner were 225s. Sorry i my specs are alil vage. What will happen if i used these heads?? Head guy said something about valve shroud and the runners were to big for a cammed 346.
01-28-2007, 12:23 PM
#4
On The Tree
iTrader: (5)
Join Date: Dec 2006
Location: Mt. Airy MD
Posts: 196
Likes: 0
Received 0 Likes
on
0 Posts
Measure them and SEE what they are. They are hand ported 241 heads. Runners are NOT too big, weve used good 240cc heads on 347s and made good power everywhere, and weve used shitty 210 cc heads and made 0 power anywhere.
A port that moves no air in a small package is definitely no any better than a healthy sized port that moves a bunch of air WELL.
I dont remember them having 2.08 valves.
A port that moves no air in a small package is definitely no any better than a healthy sized port that moves a bunch of air WELL.
I dont remember them having 2.08 valves.
01-28-2007, 01:05 PM
#6
One time I installed a set of TFS Twisted Wedge heads on a 305. Do the valve-shrouding math on that one. 2.02 + 1.60 = 3.62". The bore size was only 3.74". That only leaves 0.12" extra to split between the valves, the exhaust valve and the bore, and the intake valve and the bore. In fact, anything over about .600 lift and the intake valve would hit the bore. Even though the valve-shrouding must've been terrible, they still made alot more power than the stockers.
Mike
Mike
01-28-2007, 01:24 PM
#7
TECH Regular
Thread Starter
iTrader: (4)
Join Date: Jan 2004
Posts: 474
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by AshWS6
Measure them and SEE what they are. They are hand ported 241 heads. Runners are NOT too big, weve used good 240cc heads on 347s and made good power everywhere, and weve used shitty 210 cc heads and made 0 power anywhere.
A port that moves no air in a small package is definitely no any better than a healthy sized port that moves a bunch of air WELL.
I dont remember them having 2.08 valves.
A port that moves no air in a small package is definitely no any better than a healthy sized port that moves a bunch of air WELL.
I dont remember them having 2.08 valves.
Trending Topics
01-28-2007, 01:27 PM
#8
Moved from Advanced Tech. More eyes in here.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
