Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!

Is my 91 a roller cam or not? Cam specs?

Old 03-17-2007 | 07:31 PM
  #1  
edman87k5's Avatar
Thread Starter
Member

iTrader: (3)
 
Joined: Aug 2006
Posts: 253
Likes: 1
From: above Baton Rouge, LA
Car: depends on the weather
Engine: several
Transmission: all manual
Axle/Gears: lots
Is my 91 a roller cam or not? Cam specs?

I have a 91 rs, 305 tbi, 5 speed. Is this a roller cam motor or not?
Also, does anyone know the factory cam specs for this motor?
Old 03-17-2007 | 08:10 PM
  #2  
sofakingdom's Avatar
Supreme Member
15 Year Member
iTrader: (1)
 
Joined: Sep 2005
Posts: 26,594
Likes: 1,903
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Should be.

You don't want to know. If you have to ask, you need another one.
Old 03-17-2007 | 08:13 PM
  #3  
DartByU's Avatar
Senior Member
 
Joined: Mar 2001
Posts: 838
Likes: 1
From: Silverhill,Al
Car: 92 Camaro RS
Engine: 305 TBI
Transmission: T-5
If it's stock then yes it's a roller cam, and I think it's the smallest cam GM ever put in a V8 engine.
Old 03-17-2007 | 09:38 PM
  #4  
edman87k5's Avatar
Thread Starter
Member

iTrader: (3)
 
Joined: Aug 2006
Posts: 253
Likes: 1
From: above Baton Rouge, LA
Car: depends on the weather
Engine: several
Transmission: all manual
Axle/Gears: lots
Ok, it looks like roller cam it is.
The reason I asked is I have the shortblock from my 86 and was thinking of building it for the 91rs, but the 86 is non roller and the cam is gone. The 86 has no ridge in the cyls, but cam bearings look kinda bad to me. The 91 has a lot of miles, runs good, but is starting to use some oil and I was planning on a rebuild this summer.
I guess I will just pull the 91 and build it back to stock.
Old 03-18-2007 | 01:08 PM
  #5  
Kevin91Z's Avatar
Moderator
25 Year Member
iTrader: (1)
 
Joined: Jul 1999
Posts: 10,947
Likes: 21
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Cam specs are in the tech data section of the main page of this website. I think its something like 179/193, and .370/.390 lift.
When you rebuild the 91, you can use any 87-97 TPI or LT1 camshaft. They are better than the TBI cam and will work with the stock computer, giving you a good increase in power.
Old 03-18-2007 | 01:24 PM
  #6  
DartByU's Avatar
Senior Member
 
Joined: Mar 2001
Posts: 838
Likes: 1
From: Silverhill,Al
Car: 92 Camaro RS
Engine: 305 TBI
Transmission: T-5
Originally Posted by Kevin91Z
Cam specs are in the tech data section of the main page of this website. I think its something like 179/193, and .370/.390 lift.
Even worse than that, it took some diggin to find but it's actually
.350/.384 lift and 179/194 duration 109 centerline
Old 03-18-2007 | 10:50 PM
  #7  
edman87k5's Avatar
Thread Starter
Member

iTrader: (3)
 
Joined: Aug 2006
Posts: 253
Likes: 1
From: above Baton Rouge, LA
Car: depends on the weather
Engine: several
Transmission: all manual
Axle/Gears: lots
Thanks for the info, I couldn't find it.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Jorlain
Tech / General Engine
6
10-08-2015 01:57 AM
BAMiller
TPI
4
09-14-2015 06:38 PM
angel2794
Engine Swap
11
09-08-2015 06:22 PM
Strick1
LTX and LSX
2
09-04-2015 07:11 AM
Hotrodboba400
Firebirds for Sale
0
09-02-2015 07:28 PM


Thread Tools
Search this Thread
Quick Reply: Is my 91 a roller cam or not? Cam specs?



All times are GMT -5. The time now is 05:49 PM.