TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

Any idea on this cam? 630-CPC-BC-7

Thread Tools
 
Search this Thread
 
Old Aug 1, 2019 | 01:55 PM
  #1  
gwarren007's Avatar
Thread Starter
Member
10 Year Member
iTrader: (1)
 
Joined: Jun 2010
Posts: 409
Likes: 14
From: Safford, AZ
Car: 1992 RS
Engine: 305 (LO3)
Transmission: 700R4
Axle/Gears: 2.73?
Any idea on this cam? 630-CPC-BC-7

630-cpc-bc-7. It has the octagonal flats and a factory number but nothing comes up for it.
Reply
Old Aug 10, 2019 | 03:56 PM
  #2  
gwarren007's Avatar
Thread Starter
Member
10 Year Member
iTrader: (1)
 
Joined: Jun 2010
Posts: 409
Likes: 14
From: Safford, AZ
Car: 1992 RS
Engine: 305 (LO3)
Transmission: 700R4
Axle/Gears: 2.73?
Re: Any idea on this cam? 630-CPC-BC-7

So the base lobes of this cam measures 1.32 and the intake is 1.56 and exhaust is 1.58, so .360 and .390 lift

This is a factory roller with a fuel pump lobe. Any ideas?
Reply
Old Aug 11, 2019 | 01:38 AM
  #3  
Fast355's Avatar
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
iTrader: (2)
 
Joined: Jan 2005
Posts: 10,416
Likes: 493
From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: Any idea on this cam? 630-CPC-BC-7

Originally Posted by gwarren007
So the base lobes of this cam measures 1.32 and the intake is 1.56 and exhaust is 1.58, so .360 and .390 lift

This is a factory roller with a fuel pump lobe. Any ideas?
Sounds like a 305 peanut roller to me. .350/.385 lift.
Reply
Old Aug 12, 2019 | 12:16 AM
  #4  
gwarren007's Avatar
Thread Starter
Member
10 Year Member
iTrader: (1)
 
Joined: Jun 2010
Posts: 409
Likes: 14
From: Safford, AZ
Car: 1992 RS
Engine: 305 (LO3)
Transmission: 700R4
Axle/Gears: 2.73?
Re: Any idea on this cam? 630-CPC-BC-7

Did any of them have a fuel pump lobe? That is what has me baffled
Reply
Old Aug 12, 2019 | 09:50 AM
  #5  
morgsie's Avatar
Member
iTrader: (1)
 
Joined: Feb 2008
Posts: 454
Likes: 6
Re: Any idea on this cam? 630-CPC-BC-7

My '643 cam from a 1987 TPI had a fuel pump lobe from factory.
Reply
Old Aug 28, 2019 | 09:36 PM
  #6  
TransamGTA350's Avatar
Supreme Member
25 Year Member
iTrader: (2)
 
Joined: Apr 2000
Posts: 1,536
Likes: 322
From: South Windsor, CT
Car: '89 GTA
Engine: ZZ6TPI
Transmission: T56
Axle/Gears: Borg Warner 3.70:1
Re: Any idea on this cam? 630-CPC-BC-7

Originally Posted by morgsie
My '643 cam from a 1987 TPI had a fuel pump lobe from factory.
That would make sense. Same cam used in the 1987 LG4 w/4bbl carb and mechanical fuel pump.
Reply
Old Aug 29, 2019 | 10:10 PM
  #7  
Fast355's Avatar
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
iTrader: (2)
 
Joined: Jan 2005
Posts: 10,416
Likes: 493
From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: Any idea on this cam? 630-CPC-BC-7

Originally Posted by TransamGTA350
That would make sense. Same cam used in the 1987 LG4 w/4bbl carb and mechanical fuel pump.
Yep the 87 and 88 LG4s used the same cam. The big cars did not go TBI on the 305 until 89 IIRC.
Reply
Old Aug 30, 2019 | 01:23 AM
  #8  
morgsie's Avatar
Member
iTrader: (1)
 
Joined: Feb 2008
Posts: 454
Likes: 6
Re: Any idea on this cam? 630-CPC-BC-7

the b-bodies had tbi on v8s since '89 but on v6s since '87. I believe same with 87/88 g-bodies.
Reply
Old Aug 31, 2019 | 12:58 AM
  #9  
Fast355's Avatar
Supreme Member
20 Year Member
Liked
Loved
Community Favorite
iTrader: (2)
 
Joined: Jan 2005
Posts: 10,416
Likes: 493
From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: Any idea on this cam? 630-CPC-BC-7

Originally Posted by morgsie
the b-bodies had tbi on v8s since '89 but on v6s since '87. I believe same with 87/88 g-bodies.
85 for TBI on the 4.3 in B & G bodies.
Reply
Old Sep 8, 2020 | 10:43 PM
  #10  
gwarren007's Avatar
Thread Starter
Member
10 Year Member
iTrader: (1)
 
Joined: Jun 2010
Posts: 409
Likes: 14
From: Safford, AZ
Car: 1992 RS
Engine: 305 (LO3)
Transmission: 700R4
Axle/Gears: 2.73?
Re: Any idea on this cam? 630-CPC-BC-7

Thank you.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
PAFORM350
Engine/Drivetrain/Suspension Parts for Sale
3
Mar 12, 2009 02:18 PM
doppler
Engine/Drivetrain/Suspension Parts for Sale
7
Oct 30, 2008 11:57 PM
gmgod
Tech / General Engine
1
Nov 27, 2004 05:26 PM
1983Fbody
Tech / General Engine
7
Feb 9, 2004 06:55 PM
pennylessz28
TPI
16
Jul 10, 2002 12:24 PM




All times are GMT -5. The time now is 08:34 AM.