L30 & LF7 Where the HP differance? - Team Camaro Tech
Engine General Engine Discussion.

 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old Jan 11th, 06, 07:29 PM Thread Starter
Senior Tech
 
Join Date: Mar 2005
Location: Knoxville, TN.
Posts: 438
L30 & LF7 Where the HP differance?

the 67 and 68 model L30 (327)have 275 HP with a 4 bbl carb and the 69 LF7 (327) Has 210 HP with 2 bbl carb. Does anyone know where the 65 HP was lost at in 69?

Have you hugged your kids today?? Tell them you love them also..
Heaven got a little sweeter. We miss you Mandy..
Chuck L is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old Jan 11th, 06, 07:52 PM
 
Join Date: Nov 2005
Posts: 143
Re: L30 & LF7 Where the HP differance?

camshaft.cylinder heads and carburetion
pro1 is offline  
post #3 of 8 (permalink) Old Jan 11th, 06, 09:13 PM
 
Join Date: Apr 2000
Posts: 21,341
Question Re: L30 & LF7 Where the HP differance?

Camshaft is the same, the great, little old-929!!

2 points in compression drop due to the heads and carb.

And I wouldn't put it past GM to have stuck 1.72"/1.50" valve Powerpack heads on the 210 hp jobber, but I don't know for sure vs the 1.94"/1.50" double-hump heads on the 275 motor?

pdq67



pdq67 is offline  
 
post #4 of 8 (permalink) Old Jan 11th, 06, 09:24 PM
Senior Tech
John
 
Join Date: Feb 2001
Location: Maine
Posts: 3,099
Re: L30 & LF7 Where the HP differance?

pdq is right. Same cam, but more compression, the 4 barrell carb and intake and better heads. The LF7 did come with dinky little 1.72/1.50 valves.

John

- '68 Chevy Camaro (sort of done, but always subject to improvement)
- '63 Pontiac Tempest (work in progress)
- '72 Datsun 240-Z (back-burner for now)
boodlefoof is offline  
post #5 of 8 (permalink) Old Jan 11th, 06, 09:34 PM Thread Starter
Senior Tech
 
Join Date: Mar 2005
Location: Knoxville, TN.
Posts: 438
Re: L30 & LF7 Where the HP differance?

Did the more compression come from Pistons? or smaller cc heads? It sounds kinda like the LM1-350ci 255HP and the L48-350ci-300HP deal, heads and carb are what made the differance of that 45 HP

Have you hugged your kids today?? Tell them you love them also..
Heaven got a little sweeter. We miss you Mandy..
Chuck L is offline  
post #6 of 8 (permalink) Old Jan 12th, 06, 12:22 AM
Senior Tech
Wes
 
Join Date: Dec 2003
Location: Leander, TX
Posts: 2,762
Re: L30 & LF7 Where the HP differance?

Like was said above,..higher compression, larger valves, and 4 bbl vs. 2, made the diff between the 210 vs. 275 hp 327's.

But don't forget, even at 275 hp, that would be equal to about 220 hp at the wheels (20% penalty for drivetrain and accessory drag...today's cars hp ratings are measured at the wheels,..not flywheel as was the case pre-1972).

I know a few (ebay, etc) are lobbying for the 275 hp 327 HP to be held as SS's. I say no way. We're talking late 60's here,..not late 50's.

My opinion.

Last edited by Straight-line-69; Jan 12th, 06 at 08:24 AM.
Straight-line-69 is offline  
post #7 of 8 (permalink) Old Jan 12th, 06, 12:39 PM
Senior Tech
John
 
Join Date: Feb 2001
Location: Maine
Posts: 3,099
Re: L30 & LF7 Where the HP differance?

I'm not sure about the piston design, but LF7 was around 8.5:1 compression and the L30 had 10.25 if I remember right. I think the LF7's "power pak" heads had around 70-72cc chambers, while the L30 had smaller chambers.

John

- '68 Chevy Camaro (sort of done, but always subject to improvement)
- '63 Pontiac Tempest (work in progress)
- '72 Datsun 240-Z (back-burner for now)
boodlefoof is offline  
post #8 of 8 (permalink) Old Jan 12th, 06, 08:30 PM
 
Join Date: Apr 2000
Posts: 21,341
Smile Re: L30 & LF7 Where the HP differance?

Medium valve double-humps hould be right at 64 cc's and have about 160 cc intake ports vs the little valve powerpack heads right at 137 or so cc's.

pdq67



pdq67 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