09-29-2009, 06:53 AM | #1 |
Drives: 1999 Z28 1983 Z28 Join Date: Nov 2008
Location: City of Champions,MA
Posts: 616
|
Please GM...upgrade the pistons in the LSA
Please upgrade the pistons in the LSA before it goes into the Z28. For the love of god don't use cast pistons in this car. These won't be Cadillacs but modified race cars. Its only a few hundred bucks.
If cast pistons go in that motor it will be viewed as another major for GM.
__________________
Current cars:
99 Z28 06 Silverado 14 Silverado |
09-29-2009, 09:50 AM | #2 |
Hail to the King baby!
Drives: '19 XT4 2.0T & '22 VW Atlas 2.0T Join Date: Dec 2008
Location: Illinois
Posts: 12,173
|
Modified race cars?
__________________
"Speed, it seems to me, provides the one genuinely modern pleasure." - Aldous Huxley
|
09-29-2009, 09:53 AM | #3 |
Account Suspended
Drives: Cargo van. Join Date: Jul 2009
Location: Metal Metal Land
Posts: 1,247
|
I would hope that the z28 would get forged pistons....seeing as 300hp evos even get forged internals.
|
09-29-2009, 10:30 AM | #4 |
even w/ cast pistons its still low compression, and can hold decent amount of boost. sure forged would have been better. atleast reassuring n e ways. have there been n e known LSA engine failures. i've done some google searching and came up w/ nothing yet. so thats a plus.
|
|
09-29-2009, 10:38 AM | #5 | |
Waiting...
Drives: 2009 G8 GXP M6 Join Date: Jun 2008
Location: Jamestown NC
Posts: 275
|
Quote:
|
|
09-29-2009, 10:43 AM | #6 | |
Drives: 2005 SilveradoSS AWD Join Date: Jan 2009
Location: Orange County -CA
Posts: 426
|
also please add some wings and a jetpack, besides being a modified race car they will also be bi-planes!
__________________
Sales Forcasting 101A:
Quote:
|
|
09-29-2009, 11:09 AM | #7 |
Drives: 2010 Camaro, 2SS/RS Join Date: May 2009
Location: King George, Va
Posts: 881
|
I would be less worried about the cast part and more worried about the hyper-eutectic part. Those silicon infused cast aluminum pistons really REALLY dont like detonation. Which can occur very easily in a supercharged motor's combustion chamber.
Hyper-eutectic is great for NA, but not so good for supercharged cars. Even though the CR is 9.1:1, I personally would be very conscious of anything that could make the car run lean.
__________________
2010 2SS/RS CGM American Racing Headers, Magnaflow axle back, Roto-Fab CAI, Audio Integrations Sub box, Alpine Type R 10, Alpine MRP-500 amp, Pro Clips iPhone Mount |
09-29-2009, 11:21 AM | #8 |
Drives: 1968 Chevelle, 1971 Monte Join Date: May 2009
Location: Peoples Socialist Republic of California
Posts: 107
|
GM is not going to build a LSA just for the Z28.....You want forged pistons your going to have put them in the engine. GM will not put noisy forged pieces into the Cadillac and it would require a complete recert to put them into just the Camaro engine which would add to the cost. It is more than just throwing them into engine, there would be design, durability testing, emission cert, and NVH testing it is more than a few bucks. Beside there are plenty of people getting 600 hp or more out of supercharged LS3 and they have cast pistons, yes it would be added insurance but it isn't gonna happen.
|
09-29-2009, 11:27 AM | #9 |
Drives: 1999 Z28 1983 Z28 Join Date: Nov 2008
Location: City of Champions,MA
Posts: 616
|
Yes, there is no arguing the Z28 is the GT500 competitor. The GT500 has a forged rotating assembly and is pushing 900hp on the stock short-block with mods. Z28 guys are going to do the same thing with their cars.
If the Z28 gets a cast piston LSA, it will be the same shameful act they did when they put that god awful 7.5" 10-bolt rear-end behind the LS1.
__________________
Current cars:
99 Z28 06 Silverado 14 Silverado |
09-29-2009, 12:42 PM | #10 |
Camaro➎ moderator
|
you underestimate how great of an engine the LSA is..................
|
09-29-2009, 01:24 PM | #11 | |
Account Suspended
Drives: Cargo van. Join Date: Jul 2009
Location: Metal Metal Land
Posts: 1,247
|
Quote:
But you would take forged pistons over cast right? I mean a freaking 300 hp evo has them. Its not much exta work. Hell most cars have cam/intake/exhaust variations year by year anyways. Look at the 4th gen ls1s...almost no year had the same engine parts. Emissions certs LOL. Its not that big of a deal to replace pistons. |
|
09-29-2009, 01:47 PM | #12 |
Drives: 2010 Camaro 69 Nova Join Date: Oct 2008
Location: Galesburg, Illinois
Posts: 447
|
Really there are benifits to a hyperutectic piston. A forged piston tends to expand more as it gets to operating temps. You have to add additional clearance with a forged piston to allow for that growth.
During the warm up cycle there can be an increase in wear due to the aditional clearance. The hyperutectic is quieter and the knock sensors can be more sensitive verses a forged engine. Some people are like my daughter, once she gets one thing she isn't happy and wants more. I am happy to first get the Camaro and now it looks like a Z28! The LSA ia a stout combination, we need to realize that GM has to pull the parts from existing platforms. It'a about using what you have developed. Looking at some of the CTS-V message boards has given me a lot of encouragement with my LSA conversion. These things are making some big power on stock shortblocks. Robin
__________________
Holley Performance Products
|
09-29-2009, 01:55 PM | #13 |
Drives: 1999 Z28 1983 Z28 Join Date: Nov 2008
Location: City of Champions,MA
Posts: 616
|
The Blue oval has no problem with the forged pistons they have been putting in the blown Cobras/GT500s.
Trust me when I say people are going to modify the hell out of these cars and push the power envelope as far as they can. Ford saw this and answered with a forged rotating assembly. GM can do it, they just need not to bow to the beancounters like they have countless times before. Hyperexpoldeit pistons are junk for the power levels the Z28 is looking at and have been a weak link in every motor they have ever been installed into. The crank and rods are beefy in the LSA. I don't need a sales pitch on Hyper pistons, I have been around enough cars to know that they are way above their pay grade in this type of engine.
__________________
Current cars:
99 Z28 06 Silverado 14 Silverado |
09-29-2009, 02:13 PM | #14 |
A ***'s Headache
Drives: Everything Join Date: Aug 2009
Location: Texas
Posts: 2,174
|
|
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
The mighty LSA supercharged V8. | Mr. Wyndham | Camaro ZL1 Forum - ZL1 Specific Topics | 137 | 05-07-2011 10:05 PM |
cant find the right pistons!!!! | stang_kllr | 1st & 2nd Generation Camaros | 8 | 06-16-2009 10:25 PM |
The new CTS V for 2009!!! LSA GMHTP...READ THIS. | TAG UR IT | General Automotive + Other Cars Discussion | 15 | 04-01-2008 09:21 PM |
GMHTP '09 CTS-V Gets 550+HP LSA! | TAG UR IT | General Automotive + Other Cars Discussion | 8 | 02-28-2008 10:47 PM |