PONTIAC FACT:
Untitled Document
National Parts Depot
Trans Am Cam

 
Post new topic   Reply to topic    PontiacRegistry.com Forum Index -> Firebird/TransAm: 1967 - 2002
View previous topic :: View next topic  
Author Message
Larry
Site Admin


Joined: 01 Jun 2006
Posts: 4768




PostPosted: Sun Mar 09, 2014 9:18 pm    Post subject: Trans Am Cam Reply with quote

Am pulling the 400 in my niece's '76 Trans Am to "freshen up" a tired engine. We're hoping the cylinders aren't egg-shaped to avoid cost of boring and new pistons. It doesn't burn any oil now, and it isn't going to be a race car either. If the crank needs turning, that will be OK. Certainly the heads will be thoroughly gone through as I think that is the main cause of its poopy-ness.

Question, as we are going through so much, a nicer cam would be a neat addition. It has been so long ago since I built the 400 in my '69 custom wagon, I cannot recall the cam I used. It was a High Energy one and in what street-speak might think of as 3/4-race. It has just the right amount of rumpity-bump to let you know it isn't stock, and shakes the fenders just about right.

Now, the $10,000 question. What would be a good recommended cam to use for this car to achieve this sort of result? Naturally it will remain hydraulic, 1.5 rocker ratio, and we will replace all the lifters with new too. Don't need rocker stuff either.

Also, should one trust old cam bearings, even if it has very good oil pressure?

Thoughts? Suggestions?

_________________
PontiacRegistry.com... building the single largest source of Pontiac information, services, and entertainment in the world!
Back to top
View user's profile Send private message Send e-mail AIM Address
super



Joined: 08 Aug 2006
Posts: 643
Location: Sullivan, Missouri

1974 Super Duty TransAm

PostPosted: Tue Mar 11, 2014 8:46 pm    Post subject: Reply with quote

Hi Larry,

I will speak to Lee Jay Ruwwe in reference to the 400 you are wanting to wake up.

There are a lot of camshaft choices out there now.

What rear gears does the car have?

Leaving the transmission converter stock?

Is it the original 400?

Get ahold of you soon. Very Happy
Back to top
View user's profile Send private message
Larry
Site Admin


Joined: 01 Jun 2006
Posts: 4768




PostPosted: Tue Mar 11, 2014 11:33 pm    Post subject: Trans Am Cam Reply with quote

Hi Jeff,

I don't know the rear ratio, but it is stock, as is the original 400. Yes, we will leave the converter alone. Trying to do on a bit of a budget, and really, good performing stock specs will be plenty of oomph. Just thinking a worn out cam is very possible, and since we are going through a complete tear down, it is a cheap addition.

Thanks,
Larry

_________________
PontiacRegistry.com... building the single largest source of Pontiac information, services, and entertainment in the world!
Back to top
View user's profile Send private message Send e-mail AIM Address
Guest









PostPosted: Wed Mar 12, 2014 2:17 am    Post subject: Reply with quote

Hi Larry,

If the car is all original, the gear ratio should be fairly easy to determine. There is an axle code located on the front of the axle tube. The code should be on the passenger side axle tube.

PS - 2.41 posi

PU - 2.73 posi

PW - 3.08 posi

PX - 3.23 posi

LD - 3.23 posi

This will be a factor in picking a cam for the heavy TA. They are definitely not light.
Back to top
Display posts from previous:   
Post new topic   Reply to topic    PontiacRegistry.com Forum Index -> Firebird/TransAm: 1967 - 2002 All times are GMT - 5 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum
Untitled Document

PontiacRegistry.com, the ALL Pontiac Club for ALL Pontiac Lovers– dedicated to the preservation, restoration, and enjoyment of all years, models, and types of Pontiacs. Enjoy your Pontiac hobby at the only 24-7 Pontiac Club that brings you Pontiac News, Pontiac Information, and Pontiac Entertainment at the speed of light. Join today and help support and build the best of all Pontiac Clubs in the world. Clubs are for people too, not just cars. If you do not yet have a Pontiac, or just enjoy sharing information and learning about them....welcome!





 All Rights Reserved © 2012-2024 PontiacRegistry.com, LLC PRIVACY POLICY | TERMS & CONDITIONS | CONTACT US
Michael J. Gifford, Web Developer