Cam Good for TPI or not?
03-06-2003, 11:57 PM
#1
Junior Member
Thread Starter
Join Date: Oct 2002
Location: Florida
Posts: 89
Likes: 0
Received 0 Likes
on
0 Posts
Cam Good for TPI or not?
I have a 350 block from a 73 vette I'm rebuilding...
.040" over, crank turned...
Would a 214/224 @.050" cam be good?? Running around .500" total lift? I know a TPI engines run best when shifted from 5400-5600 RPM...and max horses at 4750-4850 RPM. But does this cam maximize on this? Or limit me?
An article about making a TPI run 12s used a 212/226 @.050" cam. It also said they had 0.515/0.555 inch intake and exhaust lift with 1.6:1 rockers arms. It worked for them...enough to get a 12.3 quarter anyway. :hail: (it was combined with a lot of other upgrades including and not limited to suspension...but that part is later, it takes doing one step at a time
)
I was also wondering if I could achieve the same lift numbers that they did....should I tell the machine shop to go .040" over or a different amount?
Thanks to everyone for the help!
.040" over, crank turned...
Would a 214/224 @.050" cam be good?? Running around .500" total lift? I know a TPI engines run best when shifted from 5400-5600 RPM...and max horses at 4750-4850 RPM. But does this cam maximize on this? Or limit me?
An article about making a TPI run 12s used a 212/226 @.050" cam. It also said they had 0.515/0.555 inch intake and exhaust lift with 1.6:1 rockers arms. It worked for them...enough to get a 12.3 quarter anyway. :hail: (it was combined with a lot of other upgrades including and not limited to suspension...but that part is later, it takes doing one step at a time
)I was also wondering if I could achieve the same lift numbers that they did....should I tell the machine shop to go .040" over or a different amount?
Thanks to everyone for the help!
03-07-2003, 02:04 PM
#2
Supreme Member
Join Date: Jun 2001
Location: Calgary, Alberta, Republic of Western Canada
Posts: 3,238
Likes: 0
Received 4 Likes
on
4 Posts
Car: 1986 Sport Coupé
Engine: 305-4v
Transmission: 700R4 and TransGo2
Probably if you ask on the TPI board they could help you more.
But with a fuel injected engine it is IMPORTANT to have a wider Lobe Separation Angle (LSA) than with carbs, because that will produce the good strong vacuum signal your FI sensors need. Look for something in the neighbourhood of 114*.
But with a fuel injected engine it is IMPORTANT to have a wider Lobe Separation Angle (LSA) than with carbs, because that will produce the good strong vacuum signal your FI sensors need. Look for something in the neighbourhood of 114*.
03-07-2003, 10:51 PM
#4
TGO Supporter
Join Date: Oct 2002
Location: Saskatoon, SK, Canada
Posts: 9,067
Likes: 0
Received 1 Like
on
1 Post
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
It all depends... what other parts are going to be installed? ie. heads, headers, carb(?), intake manifold(?), rockers...
Before any of us could give you a good answer, we'd need to have a little more info on the build.
Before any of us could give you a good answer, we'd need to have a little more info on the build.
03-08-2003, 03:57 AM
#5
Senior Member
iTrader: (1)
Join Date: Nov 1999
Location: Hayward, CA
Posts: 893
Likes: 0
Received 0 Likes
on
0 Posts
Car: 91 camaro
Engine: 383
Transmission: T56
An article about making a TPI run 12s used a 212/226 @.050" cam. It also said they had 0.515/0.555 inch intake and exhaust lift with 1.6:1 rockers arms. It worked for them...enough to get a 12.3 quarter anyway.
Thread
Thread Starter
Forum
Replies
Last Post
Sanjay
Engine/Drivetrain/Suspension Parts for Sale
1
08-12-2015 03:41 PM