Inside the Engine - Grand Prix Net

You are not logged in. [Log In] Grand Prix Net » Forums » Other Topics » Everything Else » Inside the Engine

Page 2 of 2

Topic Options

Rate This Topic

#183720 - 10/15/07 11:05 AM

Re: Inside the Engine

RooK

Member

Registered: 03/07/05
Posts: 5158
Loc: Southern KY

Newer GM V8s can run high compression due to aluminum blocks and heads wicking away heat. Even aluminum headed V6s in GMs lineup are pushing 10:1 or more.

_________________________
'13 Mustang 3.7V6 - MT82
'00 GP SE (L67 Swap, XP, Headers, 3.25")
'98 GTP, '01 Bonne

Top

#183721 - 10/15/07 11:11 AM

Re: Inside the Engine

theone2043 Offline

Member

Registered: 02/09/07
Posts: 1937
Loc: Pocono, PA

how do you increase the compression? whats the highest you can get from the 3800 with out blowing it up??

_________________________

Top

#183722 - 10/15/07 11:17 AM

Re: Inside the Engine

RooK

Member

Registered: 03/07/05
Posts: 5158
Loc: Southern KY

#1: Milling the heads or installing taller pistons.

#2: No idea. Probably in the 11-12:1 area, running premium.

_________________________
'13 Mustang 3.7V6 - MT82
'00 GP SE (L67 Swap, XP, Headers, 3.25")
'98 GTP, '01 Bonne

Top

#183723 - 10/15/07 12:07 PM

Re: Inside the Engine

theone2043 Offline

Member

Registered: 02/09/07
Posts: 1937
Loc: Pocono, PA

what is milling?

_________________________

Top

#183724 - 10/15/07 02:38 PM

Re: Inside the Engine

RooK

Member

Registered: 03/07/05
Posts: 5158
Loc: Southern KY

http://en.wikipedia.org/wiki/Milling_machine

_________________________
'13 Mustang 3.7V6 - MT82
'00 GP SE (L67 Swap, XP, Headers, 3.25")
'98 GTP, '01 Bonne

Top

#183725 - 10/15/07 02:53 PM

Re: Inside the Engine

theone2043 Offline

Member

Registered: 02/09/07
Posts: 1937
Loc: Pocono, PA

so when they say they milled the heads they are doing a horiontal mill correct?

_________________________

Top

#183726 - 10/15/07 03:32 PM

Re: Inside the Engine

SlickGTP Offline

Member

Registered: 03/26/07
Posts: 1399
Loc: Houston, TX

Props to the person who figured out how to put a camera in a cylinder.

That was pretty cool.

_________________________

Kinda sorta, yeah, no?

'02 Black GTP - RIP 03/03/08 ||| '06 Black G35 MT6 - Stock ||| '73 Chevy half ton(resurrected)

Top

#183727 - 10/15/07 03:56 PM

Re: Inside the Engine

lonezergling Offline

Member

Registered: 12/27/06
Posts: 2159
Loc: Waterford, WI

Yes, theone. They mill the head-to-block mating surface providing a very smooth gasket surface, as well as bumping compression because the head is made shorter.

_________________________

http://s4.photobucket.com/albums/y130/venomman/
"If you are asking if you can do it, you can't. When you have learned enough to know that you can do it, you are able to." -me

Top

#183728 - 10/15/07 04:32 PM

Re: Inside the Engine

ordonez1307 Offline

Member

Registered: 04/18/05
Posts: 8901
Loc: Bradenton, FL

Quote:

Originally posted by lonezergling:
Richard... PLEASE tell me you were joking...

OUR cars run either an 8.5:1 (GTP) or 9.5:1 (GT) compression ratio. MOST GM V8s run around a 12.6:1 or at least the LS7 does.

almost.
GT's run 9.4:1 from the factory

_________________________
Corey Smith

Top

#183729 - 10/15/07 04:47 PM

Re: Inside the Engine

lonezergling Offline

Member

Registered: 12/27/06
Posts: 2159
Loc: Waterford, WI

I knew somebody would correct me on that.

I just couldn't remember which engine had the .4

_________________________

http://s4.photobucket.com/albums/y130/venomman/
"If you are asking if you can do it, you can't. When you have learned enough to know that you can do it, you are able to." -me

Top