so what cam would you run in your 69 302 Z/28 - Team Camaro Tech
Engine General Engine Discussion.

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 24 (permalink) Old Apr 16th, 04, 08:02 PM Thread Starter
Tech Team
 
Join Date: Apr 2004
Location: sf bay area
Posts: 50
Post

I dont have the the orginal cam in my motor and I hate it,to big.any suggestions?
Richard [img]graemlins/beers.gif[/img]

Rich /matching #s garnet red 69 Z/28 RS
svtrich is offline  
Sponsored Links
Advertisement
 
post #2 of 24 (permalink) Old Apr 16th, 04, 08:25 PM
 
Join Date: Apr 2000
Posts: 21,341
Smile

You caught me looking at little-bitty solid cams for my 283 motor that I am going to try to make some day at 9.75 to 1 CR. or thereabouts so here goes if you want more low-end out of your Z- motor!!

An old Isky grind single pattern .481/256/212/ on a 110/110 lashed at .020.....timing 18-58...58-18, and it is symetrical.

Or;

An Erson solid cam, PN TQ20M, 270/220, .465/.465. Timing at .050 duration, IO=23/IC=67, EC=67/EO=23.

Or;

A really old Isky Hi Rev Solid, PN = E-4, (19-61 / 56-24) .... 260/?, 114/122, .410" gross lift and lash at .015.

Or;

In my last 327 I had a Crane F218/2933-12 lobe.
.440 / 218 @ .050 on a 112 .Great idle , pulled 17 in vac at idle .. dead under 2000 but went nuts between 4000 and 6000 RPM....Mainly due to that 112..Grind it on a 108 and it would be great....

Or;

UDHarold's grinds like

256/225, 110/?, .454" gross lift.
264/232, 110/?, .470" gross lift.
272/238, 110/?, 485" gross lift.

Or;

CC 270S solid...

Or;

One of my favorite solids but old-fashioned today, the great little old GM, stock, Duntov -097 solid Vette cam....

It came stock in 283's and up to the 360hp/327 F.I. motor back in the day.....

Please note these little-bitty older cams will really tune your motor down so that it will produce a lot more low and midrange torque if your compression isn't too high to use them.. AND they are NOT race cams by NO Stretch!!!!!

I can't help you if you are still running a true 11 to 1 CR. Z-28 motor so you are on your own there, b/c any attempt tp tune them down will probably lead to more detonation problems b/c of a faster closing of the intake valve trapping more charge -- sorta deal..

pdq67



pdq67 is offline  
post #3 of 24 (permalink) Old Apr 17th, 04, 05:09 AM
Senior Tech
Rex
 
Join Date: Mar 2004
Location: longview tx
Posts: 662
Post

keep an eye on ebay, I have seen several 302 cams listed

69 x-11..LS1, 420.88 horse to the tires,750 Holley Ultra DP, Torquer V2, darksides headers, PRC heads, 10.8:1 compression, forged bottom end, 5 speed. 2008 King Ranch F150 4x4.
trex70 is offline  
 
post #4 of 24 (permalink) Old Apr 17th, 04, 05:39 AM
 
Join Date: Apr 2000
Posts: 21,341
Unhappy

trex70,

I don't think he wants a 30-30 cam like is stock in his Z- motor b/c it doeasn't have any low-end either!!

That's why I mentioned de-tuning it with a little-bitty solid. A CC 270S should do it for him, but it still won't create off idle grunt like some of the little-bitty solid cams that I posted will, but then you subtract from your top-end high rpm charge!!!???!!!???!!!???

pdq67

PS., as bad as I hate to say this, the only way he's gonna get grunt is by stroking it and there goes the high rpm joy of owning a real Z-motor, imho!!!

B/C it's no longer a 302!!



pdq67 is offline  
post #5 of 24 (permalink) Old Apr 17th, 04, 09:04 AM
Team Member
John
 
JohnZ's Avatar
 
Join Date: Sep 2000
Location: Washington, Michigan USA
Posts: 7,728
Post

The '70-'72 LT-1 cam is a good replacement - still has the mechanical "music" of the 30-30, but has about 20% more torque at low-to-mid rpm, and uses all stock valvetrain components (just swap the cam and lifters, and keep everything else that's already there). If I ever have to rebuild my original engine, it'll get the LT-1 cam, and nobody but me will know the difference. [img]graemlins/thumbsup.gif[/img]

JohnZ
CRG
JohnZ is offline  
post #6 of 24 (permalink) Old Apr 17th, 04, 09:21 AM
 
Join Date: Apr 2000
Posts: 21,341
Red face

Darn John!!!!!

I keep forgetting about the great old -178 cam!!

My BAD!!!

But if we are talking about one like that, I would go a CC 282S...

Or Harolds 272/282 solid... Again, jmho...

pdq67



pdq67 is offline  
post #7 of 24 (permalink) Old Apr 17th, 04, 09:35 PM Thread Starter
Tech Team
 
Join Date: Apr 2004
Location: sf bay area
Posts: 50
Post

is there a lot of difference in the sound of a 69 302 and a 70 z28 running. [cam wise]
Richard [img]graemlins/beers.gif[/img]

Rich /matching #s garnet red 69 Z/28 RS
svtrich is offline  
post #8 of 24 (permalink) Old Apr 18th, 04, 04:36 AM
Senior Tech
Mark
 
Join Date: Feb 2002
Location: LR AR
Posts: 2,372
Post

Not a lot of difference in the sound. It has a simmilar exhaust event compared to stock but less intake event so it still sound original. It gives you a lot more bottom end torque as compared to the "30-30". They are about even powerwise at 5500 RPM but at any speed below that, the LT-1 is definately better.

-Mark.
stingr69 is offline  
post #9 of 24 (permalink) Old Apr 19th, 04, 02:05 PM Thread Starter
Tech Team
 
Join Date: Apr 2004
Location: sf bay area
Posts: 50
Post

well I had a chance to talk to my buddy at the machine shop today and he recommened a Crower cam with a [email protected], 500 lift with a 1.6 intake rocker and a 1.5 on the exhaust.Well,he was [img]graemlins/beers.gif[/img] pretty darn close. I called Crower and they recommened a #00304 cam. 110 lobe center,236 244 @50,522 510 lift.
Richard:cheers:

Rich /matching #s garnet red 69 Z/28 RS
svtrich is offline  
post #10 of 24 (permalink) Old Apr 19th, 04, 03:22 PM
Team Member
John
 
JohnZ's Avatar
 
Join Date: Sep 2000
Location: Washington, Michigan USA
Posts: 7,728
Thumbs down

The 110* LSA is a torque-killer; if you didn't like the "30-30" torque at normal driving rpm, you'll like the Crower even less. You have to decide whether you want more street driveability (torque) or let them sell you a "race" cam that doesn't come alive until over 4000 rpm; you CAN'T have both. People "over-cam" almost as often as they "over-carb", but you can't fix the former by removing four nuts. [img]graemlins/clonk.gif[/img]

JohnZ
CRG
JohnZ is offline  
post #11 of 24 (permalink) Old Apr 19th, 04, 03:40 PM Thread Starter
Tech Team
 
Join Date: Apr 2004
Location: sf bay area
Posts: 50
Post

Hi John
I dont have a 30-30 cam in my engine.I think this cam came out of Jeff Gordons nascar. I dont even know what power brakes are because of the vacuum.is so low.
Richard [img]graemlins/clonk.gif[/img]

Rich /matching #s garnet red 69 Z/28 RS
svtrich is offline  
post #12 of 24 (permalink) Old Apr 19th, 04, 04:25 PM
 
Join Date: Apr 2000
Posts: 21,341
Angry

It won't be a Z- motor anymore but think about dropping in a great, but old-fashioned -097 Little Duntov solid cam!!!

I really think you will like it!! I know I liked it in my junk 301!!!

Add a set of 1.6 ratio rockers to help the little cams lift out if you want..

And don't be afraid to stick your foot in the little motor b/c the little cam will still get up a wind!!

pdq67

PS., and don't sell the old CC 282S short here if you want one in that ball park!!!



pdq67 is offline  
post #13 of 24 (permalink) Old Apr 19th, 04, 04:53 PM
Senior Tech
Mark
 
Join Date: Feb 2002
Location: LR AR
Posts: 2,372
Post

I have not run that Crower cam but my DD2K model likes it. Very close to the LT-1 in my build but I have my doubts about how reliable the LT-1 model is. I would like to see what EA says as that software would probably model them better.

I know you can run the stock valve springs with the LT-1 cam. Not sure what Crower recomends but I bet they like cutting the spring pockets. Something to consider when thinking about more agressive than stock camshaft lobes. Higher lift with less duration usualy requires a step up in the valvetrain department in general. Just one more thing to consider.

-Mark.
stingr69 is offline  
post #14 of 24 (permalink) Old Apr 19th, 04, 09:10 PM
Senior Tech
Conrad
 
Join Date: Sep 2003
Location: IOWA
Posts: 285
Post

Go with the "178" LT-1 cam (3972178). It will idle at 600 rpm if you have your carb. dialed in, and pull right up to 7000 rpm with out a problem. Back in '88 I built a LT-1 for my 76 corvette with an automatic. I used the TRW 11:0 replacement pistions with 76cc chamber 2.02 heads and the GM 3972178 cam knowing that it came in the 1970 LT-1's which were available with auto. trans.

It sounded excellent, idled well with the A/C on and ran great with a auto trans, stock torque converter and 3.08 gear in a 3400lb Corvette.

I will be dropping this motor into my 69 in a couple of months, Can't wait. With my camaro being a 4 speed I would really like to swap the cam out for a "30-30" Z cam but will wait until I can put some smaller chamber heads on to get the compression up there beyond the pump gas range. I'm also not sure about the low gear in the car either.

Any how the LT-1 cam is an EXCELLENT mech. street choice. No doubt!!!!!!!!!!!!!!!!

69rad

69 350 4spd. Convertible **FOR SALE**
Cowl Inducted LT-1 with full Instrumentation

69 X77D80
Fathom/Black
69rad is offline  
post #15 of 24 (permalink) Old Apr 20th, 04, 03:55 AM
Senior Tech
frank
 
Join Date: Dec 2000
Location: Prince George British Col
Posts: 1,539
Post

While we're on the subject of cams, has anybody used the Erson 320HLM grind in a 327? 320 in/ex duration .534" lift in/ex on 108 lobe center. Want to use on a street driven 69 with 3200 stall auto. Anybody used a similar setup?

wot
frankk is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome