Warning about #241 heads
#1
On Probation
Thread Starter
Join Date: Oct 2008
Location: Northern Utah
Posts: 6,319
Likes: 0
Received 17 Likes
on
17 Posts
Car: seeking '90.5-'92 'bird hardtop
Engine: several
Transmission: none
Axle/Gears: none
Warning about #241 heads
Ported 241's are fine, and will make power but not as much as a ported 5.3L or LS6 head. The biggest reason 241's suck IMO is due to the fact that you drastically reduce PTV clearance if you try to get any compression out of them by milling. So be careful guys. Especially you, Jamie Sweet, since you mentioned you want to mill yours for compression. You'll need a wider lobe sep if you go ahead with this.
#2
Supreme Member
iTrader: (2)
Join Date: Dec 2006
Location: Hou. TX
Posts: 5,538
Likes: 0
Received 0 Likes
on
0 Posts
Car: 86 TA, 91 B4C
Engine: 5.3, 4.8
Transmission: 4L80 4000, T56
Axle/Gears: 4.30 M12, 23.42 10 bolt
Re: Warning about #241 heads
Yea, just another reason i might go with the 317 i have instead of the 241...
#3
Senior Member
iTrader: (1)
Join Date: Jan 2009
Location: Houston TX
Posts: 959
Likes: 0
Received 0 Likes
on
0 Posts
Car: 02 SS
Engine: 408 TT (1108rw-93/m1)6700rpm
Transmission: TH400(slipping)
Axle/Gears: 12bolt/3.42(whines😠)
Re: Warning about #241 heads
Ported 241's are fine, and will make power but not as much as a ported 5.3L or LS6 head. The biggest reason 241's suck IMO is due to the fact that you drastically reduce PTV clearance if you try to get any compression out of them by milling. So be careful guys. Especially you, Jamie Sweet, since you mentioned you want to mill yours for compression. You'll need a wider lobe sep if you go ahead with this.
ANY oe ls head will reduce ptv. when milled. the solution is cutting in relieves. not altering the camshaft specs.
the 241's far from suck in real world applications. ported heads comparison is subjective. ive seen the 241s at 320 peak cfm. and the others around same flow.
if anything what you gotta watch out for is to not mill any more than .030. if not needed. any more may cause intake to heads alignment issues.
#5
On Probation
Thread Starter
Join Date: Oct 2008
Location: Northern Utah
Posts: 6,319
Likes: 0
Received 17 Likes
on
17 Posts
Car: seeking '90.5-'92 'bird hardtop
Engine: several
Transmission: none
Axle/Gears: none
Re: Warning about #241 heads
I never said you can't make good power with 241s. But notching your stock pistons isn't entry level stuff to be trying for yourself. It's cheaper to get 5.3 heads than it is to get the cutters and notch your pistons.
#6
Senior Member
iTrader: (1)
Join Date: Jan 2009
Location: Houston TX
Posts: 959
Likes: 0
Received 0 Likes
on
0 Posts
Car: 02 SS
Engine: 408 TT (1108rw-93/m1)6700rpm
Transmission: TH400(slipping)
Axle/Gears: 12bolt/3.42(whines😠)
Re: Warning about #241 heads
notching pistons and degreeing cam are just some of the basic steps of correct cam install.
imo
#7
On Probation
Thread Starter
Join Date: Oct 2008
Location: Northern Utah
Posts: 6,319
Likes: 0
Received 17 Likes
on
17 Posts
Car: seeking '90.5-'92 'bird hardtop
Engine: several
Transmission: none
Axle/Gears: none
Re: Warning about #241 heads
I've never heard or thought of that, but you can bet I'll give it a try. And report back. Probably not until February at the soonest, however.
Thread
Thread Starter
Forum
Replies
Last Post
92projectcamaro
Engine/Drivetrain/Suspension Parts for Sale
11
01-18-2016 08:00 AM
IROCZDAVE (88-L98)
Engine/Drivetrain/Suspension Parts for Sale
0
09-02-2015 08:43 AM