im building the motor that came out of my GT so i can boost it i dont know if this maters but which one is better to use 2.3 HO crank shaft or the 2.4 LD9 Crank shaft? thanks for the info

99z for 2015.. I'm back bitches

lol

never looked at them hey? at least not side by side.................................



what one is better........



what are you TRYING to do?

Chris


'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

im just goin to rebuilt it and use it for a Daily Driver and if i wanted to do a lil racing then i could and im sry that im not a wiz about all this stuff if i was then i wouldnt be asking ?s

99z for 2015.. I'm back bitches

Well which block do you have a Quad 4 (2.3L) or a Twin Cam (2.4L)

A quad 4 crank in a LD9 block will actually destroke the engine to about 132 cubic inches (2.162 L)

While a LD9 in a Quad 4 motor will stroke the engine to 152.5 cubic inches (2.499 L)

Naturally using a Quad 4 crank on a Quad 4 block, or a LD9 crank on a LD9 block produces no change in engine displacement.

Ok Thanks man. thats what i was lookin for ok. i have both 2.3L and 2.4 i have tons of these motors and i spun a rod in my old LD9 and so i went out and got a motor out of a 02 Grand am and i swaped it in there. now i want to rebuilt and boost the motor that cam out of it. thanks for the info

99z for 2015.. I'm back bitches

did anybody think they don't exactly just drop in?


-Trailblazer SS - not so custom 6.0L - custom intake - custom tune
- (1) 2.4L on an engine stand (1) blown trans (2) good quad trans (1) eco trans = party

um..... they DON’T... have you never looked at the main journals side by side?!!!!!!


Chris



'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

Yeah i thought the 2.4 had larger journals than the 2.3. You would have to machine the caps way down and re drill the mains to make it fit. If theres enough metal there to do so.



- 97 Z24 Racecar work in progress
- 04 WRX STi
ATR Crew Member

2.3 crank won't work in a 2.4L block..

you can get a 2.4L crank into a 2.3L block however, with some precision machining. There are a few threads that discuss this option. the STROKER!


-Trailblazer SS - not so custom 6.0L - custom intake - custom tune
- (1) 2.4L on an engine stand (1) blown trans (2) good quad trans (1) eco trans = party

Do stock 2.3 HO's come with a forged steel crank or are they cast like the 2.4,I know GM sold forged 2.3 cranks over the counter but did they come stock in any of the engines?

How much hp/tq can a cast 2.4 crank take if it's deburred, knife edged, shot peened and cryo or heat treated?


2000 Z24 5spd header & catback for now.

why, just to say its forged, i never heard any bad things about the stock cranks,,, the gears breaking on them yes, but not a crank.

Chris


'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

Dale Young wrote:Do stock 2.3 HO's come with a forged steel crank or are they cast like the 2.4,I know GM sold forged 2.3 cranks over the counter but did they come stock in any of the engines?

How much hp/tq can a cast 2.4 crank take if it's deburred, knife edged, shot peened and cryo or heat treated?

the 2.4 crank... I'm pushing well over 400hp and I never broke a crank. I'll let you know when I do.


-Trailblazer SS - not so custom 6.0L - custom intake - custom tune
- (1) 2.4L on an engine stand (1) blown trans (2) good quad trans (1) eco trans = party

2.3L engine had less stroke and more bore
2.4L engine has more stroke and less bore


spyhunter said that the 2.4L crank would fit in 2.3L block thus creating the 2.5L (stroker).
no reason to get into minor details, but what is the major reason the 2.3L crank wont fit in the 2.4L block?

Journal diameters are different.

Lee >< i4 Racing > wrote:2.3L engine had less stroke and more bore
2.4L engine has more stroke and less bore


spyhunter said that the 2.4L crank would fit in 2.3L block thus creating the 2.5L (stroker).
no reason to get into minor details, but what is the major reason the 2.3L crank wont fit in the 2.4L block?

it will fit with some major machining to either the block or the crank. There's a huge discussion on quad4forums.com about it. Just go look around there for it, and you'll see what the exact details are.


-Trailblazer SS - not so custom 6.0L - custom intake - custom tune
- (1) 2.4L on an engine stand (1) blown trans (2) good quad trans (1) eco trans = party