Peanut port options
10-26-2007, 09:34 AM
#11
Gold Member
Gold MemberJoin Date: Jan 2004
Location: Houston, Texas
Posts: 491
Likes: 0
Received 0 Likes
on
0 Posts
Did not change the valve size. Did go to an upgrade material though - inconel or titanium I think. My 330's were 4 bolt mains and were strong motors. I have 2 - 525efi's in my current boat and lost both of them at 112 hours. I miss the old iron and I could work on those motors. Cam sensors, injectors, multiple coils, ... - it all sucks now a days! Tommy
10-26-2007, 10:08 AM
#12
Thanks for your input on the larger ovals. It is very interesting, but would still be interested in knowing what pocket/bowl porting and short side radius work would do to a set of "peanut port" heads with and/or without larger valves? Do you have any further knowledge on bowl/pcoket port work on the "peanut port" heads without major porting? Thanks
10-26-2007, 12:22 PM
#13
Senior Member # 68
Charter MemberJoin Date: Oct 2000
Location: Niles Mi. USA
Posts: 323
Likes: 0
Received 0 Likes
on
0 Posts
Did not change the valve size. Did go to an upgrade material though - inconel or titanium I think. My 330's were 4 bolt mains and were strong motors. I have 2 - 525efi's in my current boat and lost both of them at 112 hours. I miss the old iron and I could work on those motors. Cam sensors, injectors, multiple coils, ... - it all sucks now a days! Tommy
Turbo, thanks for your valueble input. Much appreciated!
10-26-2007, 03:52 PM
#14
Gold Member
Gold MemberJoin Date: Jan 2004
Location: Houston, Texas
Posts: 491
Likes: 0
Received 0 Likes
on
0 Posts
I had stock heads. The engine shop did some mild porting of the heads only to match the intake. I don't think there was any bowl porting of valves. Both engines dynoed very close to same numbers. The reputable machine shop was impressed with these numbers also based on the peanut port heads. Everything that was done worked well together without any 1 items overpowering the other. I did have better performance with the slightly less air flowing Edlebrock RPM manifold in lieu of the RPM Performer though. I ran the Performer after the salt ate the non-coated RPM intake thinking it would be an upgrade.
10-29-2007, 02:30 PM
#16
Registered
Join Date: Jul 2005
Location: evansville In
Posts: 482
Likes: 0
Received 0 Likes
on
0 Posts
If you don't want to change cams, Just put some 1.8 roller rockers on it and it is like a bigger cam. The rockers also give it a faster ramp on the cam so it works closer to a hyd. roller cam only alot less work!! You will have to put in new studs, and aftermarket valve covers, But it is well worth it . I changed just rockers on twins and gained 300 rpms a motor.
