Go Back   Third Generation F-Body Message Boards > Tech Boards > Tech / General Engine
Sign in using an external account
Register Forgot Password?

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!

Welcome to ThirdGen.org!
Welcome to ThirdGen.org.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join the ThirdGen.org community today!


Reply
 
Thread Tools Search this Thread
Old 11-05-2009, 09:48 AM   #1
Senior Member
 
Convoy25's Avatar
 
Join Date: Apr 2008
Location: Somerset, New Jersey
Posts: 795
Car: 2000 SS
Engine: LS1
Transmission: 4L60e
Axle/Gears: 3.23 posi

Classifieds Rating: (3)
Help with cam choice

What i have.

84 Z28 with the LG4.
Stock 3.23s
Weiand Intake
Hooker shortie headers.

What i plan to get before or soon after the cam swap
L69 Computer
build the rear with 3.73 posi.
Port and polish the heads

My use.
i plan to build a new engine (355) but i want something fun to play with while i have the 305, heck if i get another car with a v6 just swap that in.

with the 305 i'll be driving as close to a DD as possible.
i'll probably be getting on it quite often.



ok so i was looking at a bunch of cams and heres one i'm particularly interested in/wondering if it would be alright. in addition if theres anything that i would need to do.

http://www.compcams.com/Cam_Specs/Ca...x?csid=78&sb=2

any thoughts? suggestions? criticism? bad jokes?
Convoy25 is offline vBGarage Page   Reply With Quote
Old 11-05-2009, 07:05 PM   #2
Senior Member
 
Convoy25's Avatar
 
Join Date: Apr 2008
Location: Somerset, New Jersey
Posts: 795
Car: 2000 SS
Engine: LS1
Transmission: 4L60e
Axle/Gears: 3.23 posi

Classifieds Rating: (3)
Re: Help with cam choice

bump
Convoy25 is offline vBGarage Page   Reply With Quote
Old 11-07-2009, 10:49 AM   #3
Senior Member
 
Supervisor42's Avatar
 
Join Date: Jul 2005
Location: Arab, Alabama
Posts: 1,660
Car: 1988 Trans Am GTA
Engine: 350 4BBL
Transmission: 700R4
Axle/Gears: 3.27

Classifieds Rating: (0)
Re: Help with cam choice

Quote:
Originally Posted by Convoy25 View Post
any thoughts? suggestions? criticism? bad jokes?
It should be a fun cam. Not too radical and not too tame. It depends on how many miles you're going to put on it as a daily driver since the gas mileage will be traded for power.
You'll need lifters and springs and maybe rockers (depending on the heads).
I wouldn't spend a lot of time porting the heads as these have the 1.84" intake valves and it's not going to make much difference. Get the heads milled instead ($20ea) to bump the C/R from 8.6 found in the '84 to the 9.5 found in the '85 LG4. The cam swap will lower the dynamic compression ratio more than enough.
Does it have to pass emissions testing?
Supervisor42 is offline vBGarage Page   Reply With Quote
Old 11-07-2009, 01:53 PM   #4
Senior Member
 
Convoy25's Avatar
 
Join Date: Apr 2008
Location: Somerset, New Jersey
Posts: 795
Car: 2000 SS
Engine: LS1
Transmission: 4L60e
Axle/Gears: 3.23 posi

Classifieds Rating: (3)
Re: Help with cam choice

well as for driving everyday if the legacy continues, it will run for about a month, something else will break, then it will sit for 1-2 months.

as for emission tests, ehh.

i got it inspected in august. all the smog stuff was gone and it still passed.
and i dont think the place i took it to did it just for the sake of passing.
Convoy25 is offline vBGarage Page   Reply With Quote
Old 12-01-2009, 10:58 AM   #5
Senior Member
 
Convoy25's Avatar
 
Join Date: Apr 2008
Location: Somerset, New Jersey
Posts: 795
Car: 2000 SS
Engine: LS1
Transmission: 4L60e
Axle/Gears: 3.23 posi

Classifieds Rating: (3)
Re: Help with cam choice

i just cameacross this cam

http://www.lunatipower.com/Product.aspx?id=2505&gid=309

what do you guys think?
between this and the other one i posted which would be worth getting?
and for either do i need any sort of machine work done?
Convoy25 is offline vBGarage Page   Reply With Quote
Old 12-01-2009, 07:56 PM   #6
Senior Member
 
Supervisor42's Avatar
 
Join Date: Jul 2005
Location: Arab, Alabama
Posts: 1,660
Car: 1988 Trans Am GTA
Engine: 350 4BBL
Transmission: 700R4
Axle/Gears: 3.27

Classifieds Rating: (0)
Re: Help with cam choice

Quote:
Originally Posted by Convoy25 View Post
i just cameacross this cam

http://www.lunatipower.com/Product.aspx?id=2505&gid=309

...and for either do i need any sort of machine work done?
It's a little tamer split profile cam with a little less duration on the intake side. Probably have better vacuum at idle. Not real sure what the ECM will think of either one. But with both, I would check the retainer to valve guide clearance (actually the valve stem seal). How much lift you can get away with, depends on the heads. This varies between heads of the same part number to heads of different part numbers. There was a post a while back showing the top of a head littered with lots of tiny smashed valve stem seal garter springs from a cam change and inadequate clearance. Most stock heads can handle .460" lift (but not all, it just depends). You can check this before you order the cam. You'll need a dial indicator with magnetic base in addition to the tools needed to change valve stem seals.
You should be fine with valve-to-piston clearance.
I'm not 100% sure about the rocker slot. This depends on the stock rockers in the engine... probably would be ok. It's possible to check this too when doing the above, using the "light spring" technique.
Supervisor42 is offline vBGarage Page   Reply With Quote
Old 12-01-2009, 08:19 PM   #7
Senior Member
 
Convoy25's Avatar
 
Join Date: Apr 2008
Location: Somerset, New Jersey
Posts: 795
Car: 2000 SS
Engine: LS1
Transmission: 4L60e
Axle/Gears: 3.23 posi

Classifieds Rating: (3)
Re: Help with cam choice

oh ok thanks, this may end up waiting till feb, right now i'm working on the exhaust
where could i read up on how to check the valve stem steal?
Convoy25 is offline vBGarage Page   Reply With Quote
Old 12-01-2009, 09:26 PM   #8
Senior Member
 
Supervisor42's Avatar
 
Join Date: Jul 2005
Location: Arab, Alabama
Posts: 1,660
Car: 1988 Trans Am GTA
Engine: 350 4BBL
Transmission: 700R4
Axle/Gears: 3.27

Classifieds Rating: (0)
Re: Help with cam choice

Quote:
Originally Posted by Convoy25 View Post
oh ok thanks, this may end up waiting till feb, right now i'm working on the exhaust
where could i read up on how to check the valve stem steal?
Read in this article section about checking retainer-to-guide clearance.
Use the light spring and dial indicator like in the V/P clearance test to measure travel.
(Can you tell I'm an Isky guy?)
Supervisor42 is offline vBGarage Page   Reply With Quote
Old 12-03-2009, 09:28 PM   #9
Senior Member
 
blue85305's Avatar
 
Join Date: Jun 2005
Location: dfw tx
Posts: 352
Car: 1984 camaro
Engine: 350
Transmission: th 350
Axle/Gears: 3:42

Classifieds Rating: (0)
Re: Help with cam choice

i just put a magnum 270 in my 305. on a budget, we're still waiting on springs(not smart i know, but i'm broke) but it runs pretty good. actually pulls better down low that the stock cam did, and has more power above 3000rpm. i'd say do it.
__________________
84 z28-305, performer intake,comp magnum 270, hooker 2460 and dumped 2.5" duals, 600 edelbrock, turbo 350,mini spool.

95 camaro A4, hooker lts, true duals w/spiral flows, bmr lcas, ss3600
blue85305 is offline vBGarage Page   Reply With Quote
Old 12-03-2009, 11:57 PM   #10
Senior Member
 
Convoy25's Avatar
 
Join Date: Apr 2008
Location: Somerset, New Jersey
Posts: 795
Car: 2000 SS
Engine: LS1
Transmission: 4L60e
Axle/Gears: 3.23 posi

Classifieds Rating: (3)
Re: Help with cam choice

did you have to do any other work?
Convoy25 is offline vBGarage Page   Reply With Quote
Old 12-04-2009, 02:47 PM   #11
Senior Member
 
blue85305's Avatar
 
Join Date: Jun 2005
Location: dfw tx
Posts: 352
Car: 1984 camaro
Engine: 350
Transmission: th 350
Axle/Gears: 3:42

Classifieds Rating: (0)
Re: Help with cam choice

no. i already had the cam and headers laying around, and when i popped a head gasket i firgured if i was already there. only other thing i did was change the timing set. stock stall still in place.
__________________
84 z28-305, performer intake,comp magnum 270, hooker 2460 and dumped 2.5" duals, 600 edelbrock, turbo 350,mini spool.

95 camaro A4, hooker lts, true duals w/spiral flows, bmr lcas, ss3600
blue85305 is offline vBGarage Page   Reply With Quote
Old 12-04-2009, 09:43 PM   #12
Senior Member
 
Convoy25's Avatar
 
Join Date: Apr 2008
Location: Somerset, New Jersey
Posts: 795
Car: 2000 SS
Engine: LS1
Transmission: 4L60e
Axle/Gears: 3.23 posi

Classifieds Rating: (3)
Re: Help with cam choice

sweet, any sound/video clips of the cam?
Convoy25 is offline vBGarage Page   Reply With Quote
Old 12-05-2009, 11:58 PM   #13
Senior Member
 
blue85305's Avatar
 
Join Date: Jun 2005
Location: dfw tx
Posts: 352
Car: 1984 camaro
Engine: 350
Transmission: th 350
Axle/Gears: 3:42

Classifieds Rating: (0)
Re: Help with cam choice

i don't have a camera, so no sound clips.
blue85305 is offline vBGarage Page   Reply With Quote
Old 12-05-2009, 11:58 PM
ThirdGen
1992 Camaro




Paid Advertisement


Reply

Go Back   Third Generation F-Body Message Boards > Tech Boards > Tech / General Engine

Tags
270, cam, gen, magnum
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 


1982 Camaro '82 || 1983 Camaro '83 || 1984 Camaro '84 || 1985 Camaro '85 || 1986 Camaro '86 || 1987 Camaro '87 || 1988 Camaro '88 || 1989 Camaro '89 || 1990 Camaro '90 || 1991 Camaro '91 || 1992 Camaro '92


All times are GMT -5. The time now is 04:22 PM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2012, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.5.2
All content copyright © 1997 - 2012 ThirdGen.org. All rights reserved. No part of this website may be reproduced without the expressed, documented, and written consent of ThirdGen.org's Administrators.

Emails & Contact Details