Mod the LSA or Sell It And Replace with Supercharged LS7 ??? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

BiggFoot · 09-29-2011, 07:05 PM

Ladies and Gents,

Here is where I am struggling and I will need to make a decision fairly soon. I am currently considering two choices and I would like your opinions please along with any supporting information to back your stance:

Turn the LSA into a 417 Stroker with GT-9 or GT-11 cam, forged pistons, 2300 maggie, 10/14 rib pulley upgrade cranking about 750 hp.

OR

Sell the stock 580 HP LSA engine for about $12K and replace with an LS7 block, LS9 heads, forged pistons, GT-9 cam, 10/14 rib pulley upgrade, headers, cranking about 775 HP.

So what do you guys say???

91Z28350 · 09-29-2011, 07:18 PM

LS7 is a great motor, but if you are going to go with a 427, I have heard the RHS block has thicker cylinder walls and holds up to boost better. There is a reason why GM went with the 6.2 in the ZR1!

One more point, myself, I like the whipple, great whine and from what I have read and seen, the 2.9L Whipple seems to make = or more HP at lower boost and lower IAT, for about the same cost.

*Mr. Wyndham* · 09-29-2011, 07:38 PM

LS7 block doesn't like boost...very thin cylinder walls to manage that 427ci volume...

IOMZL1 · 09-29-2011, 07:44 PM

Quote:

Originally Posted by Dragoneye

LS7 block doesn't like boost...very thin cylinder walls to manage that 427ci volume...

This. And the first post too.

*Mr. Wyndham* · 09-29-2011, 07:45 PM

Wouldn't the first option be a little less expensive, too?

*radz28* · 09-29-2011, 07:53 PM

LS7 block is relatively expensive. Stroke LSA and call it a day, after your cam ans SC. How much power anyways? Maybe you could get by with rods and pistons on LSA. Same heads as LS9...

91Z28350 · 09-29-2011, 07:59 PM

My understanding also is the LSA block has additional reinforcement in the block over the LS3/LS9 block, though I do not know that for fact, I seem to remember reading it in the description of the LSA motor. If you are going for increased boost, forge the LSA, get a larger twin screw blower or TT and have at it!

GM4lyfe · 09-29-2011, 09:02 PM

All Al 6.2's should be the same. After the LS9 came out the LS3 got updated to the new casting.

GM4lyfe · 09-29-2011, 09:09 PM

Quote:

Originally Posted by BiggFoot

Ladies and Gents,

Here is where I am struggling and I will need to make a decision fairly soon. I am currently considering two choices and I would like your opinions please along with any supporting information to back your stance:

Turn the LSA into a 417 Stroker with GT-9 or GT-11 cam, forged pistons, 2300 maggie, 10/14 rib pulley upgrade cranking about 750 hp.

OR

Sell the stock 580 HP LSA engine for about $12K and replace with an LS7 block, LS9 heads, forged pistons, GT-9 cam, 10/14 rib pulley upgrade, headers, cranking about 775 HP.

So what do you guys say???

A cheaper option:
Pulley down the stock s/c
Forge pistons, rods
Cam
Tune
Headers
See where that will put ya.

Stock s/c not good enough go with the LS9 s/c. They do it for the CTS-V.

So far what has been offered to the LSA/LS9 is s/c aftermarket inlets and larger heat exchangers net great results.

*Milk 1027* · 09-29-2011, 09:09 PM

You can get that much horsepower out of the LSA without spending as much money.

GEEo · 09-29-2011, 09:11 PM

Quote:

Originally Posted by Milk 1027

You can get that much horsepower out of the LSA without spending as much money.

+1

payne.jeremy82 · 09-29-2011, 11:41 PM

Lingenfelter is where im going 700+hp at the crank Lingenfelter is the choice for me

*DGthe3* · 09-30-2011, 12:38 AM

There are better options than the LS7 if you want to swap in a supercharged engine.

Quote:

Originally Posted by payne.jeremy82

http://www.lingenfelter.com/engine-p...charged-engine-

This is where im going 700+hp at the crank Lingenfelter is the choice for me

I just lost a little respect for Lingenfelter after looking at that URL (link is broken by the way). Someone over there needs to be told that the LS3/L99/LSA/LS9 engines are not 378 cubic inches, because they're not exactly 6.2L ... they're 6.162L, which works out to 376 cubes. I thought they'd be better than that.

a_Username · 09-30-2011, 12:47 AM

Quote:

Originally Posted by DGthe3

There are better options than the LS7 if you want to swap in a supercharged engine.
I just lost a little respect for Lingenfelter after looking at that URL (link is broken by the way). Someone over there needs to be told that the LS3/L99/LSA/LS9 engines are not 378 cubic inches, because they're not exactly 6.2L ... they're 6.162L, which works out to 376 cubes. I thought they'd be better than that.

Apparently they listened to ya... I just got "page not found."

09-29-2011, 07:05 PM	#1
BiggFoot Drives: 2010 Camaro (M6) 1000+ HP SBE Join Date: Jun 2011 Location: Houston Posts: 1,391	Mod the LSA or Sell It And Replace with Supercharged LS7 ??? Ladies and Gents, Here is where I am struggling and I will need to make a decision fairly soon. I am currently considering two choices and I would like your opinions please along with any supporting information to back your stance: Turn the LSA into a 417 Stroker with GT-9 or GT-11 cam, forged pistons, 2300 maggie, 10/14 rib pulley upgrade cranking about 750 hp. OR Sell the stock 580 HP LSA engine for about $12K and replace with an LS7 block, LS9 heads, forged pistons, GT-9 cam, 10/14 rib pulley upgrade, headers, cranking about 775 HP. So what do you guys say???

09-29-2011, 07:38 PM	#3
Mr. Wyndham I used to be Dragoneye... Drives: 2018 ZL1 1LE Join Date: Jan 2007 Location: Buffalo, NY Posts: 31,876 View My Garage	LS7 block doesn't like boost...very thin cylinder walls to manage that 427ci volume... __________________ *"Keep the faith."* - Fbodfather

09-29-2011, 07:45 PM	#5
Mr. Wyndham I used to be Dragoneye... Drives: 2018 ZL1 1LE Join Date: Jan 2007 Location: Buffalo, NY Posts: 31,876 View My Garage	Wouldn't the first option be a little less expensive, too? __________________ *"Keep the faith."* - Fbodfather

09-29-2011, 07:53 PM	#6
radz28 Petro-sexual Drives: Ultra-Grin Join Date: Oct 2006 Location: Crazy Coast Posts: 15,186 View My Garage	LS7 block is relatively expensive. Stroke LSA and call it a day, after your cam ans SC. How much power anyways? Maybe you could get by with rods and pistons on LSA. Same heads as LS9... __________________ '20 ZL1 Black "Fury" A10, PDR, Exposed CF Extractor Magnuson Magnum DI TVS2650R // RFBG // Soler 103 // TooHighPSI Port Injection // THPSI Billet Lid // FF // Katech Drop-In // PLM Heat Exchanger // ZLE Cradle bushings // BMR Chassis-Suspension Stuff // aFe Bars // Diode Dynamics LEDs // ACS Composites Guards // CF Dash // Aeroforce // tint // other stuffs

09-29-2011, 09:02 PM	#8
GM4lyfe A GM nut-swinger! Drives: A Car Join Date: May 2009 Location: United Kingdom Posts: 262	All Al 6.2's should be the same. After the LS9 came out the LS3 got updated to the new casting. __________________ 2004 GTO Quicksilver 2009 G8 Liquid Red 2005 CTS-V Black Raven

09-29-2011, 07:18 PM	#2
91Z28350 Drives: 2012 GT500 SVTPP 2010 Traverse LTZ Join Date: May 2009 Location: Roanoke,TX Posts: 665	LS7 is a great motor, but if you are going to go with a 427, I have heard the RHS block has thicker cylinder walls and holds up to boost better. There is a reason why GM went with the 6.2 in the ZR1! One more point, myself, I like the whipple, great whine and from what I have read and seen, the 2.9L Whipple seems to make = or more HP at lower boost and lower IAT, for about the same cost.

09-29-2011, 07:59 PM	#7
91Z28350 Drives: 2012 GT500 SVTPP 2010 Traverse LTZ Join Date: May 2009 Location: Roanoke,TX Posts: 665	My understanding also is the LSA block has additional reinforcement in the block over the LS3/LS9 block, though I do not know that for fact, I seem to remember reading it in the description of the LSA motor. If you are going for increased boost, forge the LSA, get a larger twin screw blower or TT and have at it!

09-29-2011, 09:09 PM	#10
Milk 1027 Camaro➎ moderator Drives: '13 BLK 1LE Join Date: Aug 2008 Location: AZ Posts: 13,567 View My Garage	You can get that much horsepower out of the LSA without spending as much money. __________________

09-29-2011, 11:41 PM	#12
payne.jeremy82 Drives: 2002 Lifted Trailblazer Join Date: Sep 2011 Location: Knoxville, TN Posts: 51	Lingenfelter is where im going 700+hp at the crank Lingenfelter is the choice for me Last edited by payne.jeremy82; 09-30-2011 at 01:15 AM.