LS3's are very stout motors, but no way your getting 468RWHP on exahust/headers and a tune If that were true you would not have as many guys doing cam's and blowers. According to that claim, that person picked up over 70RWHP from exhaust/tune dream on

 

Which engine did you have in 1967? 327? 427?

 

That's great
Can you feel a big difference between the LS-2 and LS-3?

 

My ws6 only weighs a little over 3400. My ws6 has out performed every single new camaro ss at the strip, however its a little modified. My little stock mach 1 mustang has outrun a few ss's on the street. The weight in the new camaro's are a killer.

3800-3900 roughly. 400 to 500 pounds more than the trans ams back then. Mine ran 13 flat stock when I first bought it.

 

Do you have any data to back that up, or where you got that information, other than here on the forum? Sure its good info on this forum, but there are thousands of other people that drive these cars that are not on this forum. Any engine is going to have some problems. Not every single LSx motor that leaves the plant is going to be perfect. There are isolated cases in every motor. To state that an LS7 likes to drop valvles when driven daily makes no sense.

Thanks

 

I hope you just didn't jinx the LS9
http://forums.corvetteforum.com/c6-c...e-failure.html

Tom

 

Any data to back that up? It's a rhetorical question, because of course you don't. People rarely make threads to say how trouble free their cars have been,you only read about it when someone has a problem.

Me personally,I've been daily driving C6 Z06's (which to you is a big no-no) since their introduction & have not had one single issue with either of them.

I'm sorry if I sound harsh,but I'm sick & tired of seeing this rhetoric parroted on here every other day. And invariably by a non-owner of an LS7.

 

Not sure if you saw my post here above yours but I posted similar response. Being on this board now about 7 years myself that is the single most annoying thing I find, is people making general off the -cuff statements. It's one thing to say "borla sounds better than Corsa" or LG headers make more power than X brand..whatever those are small things... but to come out and just flat say "LS7's drop valves if daily driven" is just plain ignorant and stupid, and this gets old after a while

Sure there are some LS7's that have blown up, do a search here and you'll find threads on it, but you'll also find a good majority of those posted here have seen hard track time, and either failed on the track or off after being abused there.

Kinda reminds me of the 01 C5 LS1's some had burning oil issues..so everyone would avoid an 01 like the plauge, cuz a few posts about it...now every single LS1 motor built in 01 burns oil I guess I got lucky cuz mine never burned a drop.
Rant off

 

Coming from a 2001 C5 (that didnt burn the oil it was supposed to I might add) to a 2009 C6 all I can say is if you can't feel the difference in power then you must be dead in your seat. It is immediately apparent the LS3 is the winner by a wide margin.

 

Nonone here is debating that and youre right if you can't tell the difference between an LS1 and 3

 

To answer your question I would say yes, you can feel "somewhat" the difference in 30-36 stock hp. (you asked if can feel difference in power between LS2 and LS3 because I had replied that I owned both and now the LS7) I just re-read your post....something you have to realize about the Camaro's LS3 and a Corvette and it's LS3....there is a BIG weight difference in these cars....the power to weight ratio difference between a Vette and Camaro is significant. The Vettes LS3 also cranks out a few more ponies (although not many) than Camaro's. And yes, there's also difference in LS1 and the 2/3....they steadily increase in HP. They are all GREAT engines.....had a friend who had a new LS1 in '04 Vette.....was a great engine and so was my LS2 and LS3 and now my LS7....

To BSSN I think it was who says that LS7's drop valves or something if driven daily.....you don't have a clue dude.....show me the evidence because I sure have NOT experienced it....bet you don't EVEN OWN ONE....enough said...

 

If you look below in my signature you'll see my LS3 was a full second quicker and a full 8 mph faster in the quarter than my LS1.... The LS3 is totally stock the LS1 had Corsa's and a Z06 air box....

 

I have not personally blown one up, but a few of my friends know people who have, including some 70 year old guy. Then again, that's just hearsay. I don't think anyone has any hard numbers on it from GM, except GM. However, if you read the threads about it on here, it becomes readily apparent that the LS7 drops valves WAY MORE OFTEN than the LS3 (haven't heard of it), and that the failure is the same each time. Exhaust valve snaps at the head/stem. Happened on an LS9 as was previously linked--uses the same valve design. Never heard of it on an LS3, LS1, or LS2, which use solid SS exhaust valves.

 

Yes, your sample-size of one trumps my sample-size of zero.

I don't have one, nor will I buy one in the future. Of the LS line-up, the LS3 is what appeals to me.

It is common knowledge that the sodium-filled hollow exhaust valves are an issue on these cars. Otherwise they wouldn't all break nearly the same way, whether they are in the LS7 or LS9. If you don't belive me, go read a few threads. Before the GM FAITHFUL show up, you will find plenty of people who have had this problem, many while cruising along doing the speed limit. The guy with the LS9 who snapped the valve was doing a 4K rpm rev.

Or of course since yours doesn't have the problem, we can assume all is well and that noone else knows a darn thing about what they are talking about. Thing is, you don't have to own or experience something to be knowledgeable about it, thank God, or you wouldn't have an MD left who could treat anyone.

Nevermind that 6.2% of the owners of stock LS7's have dropped a valve out of the 335 owners of said cars that participated in this forum poll.
http://forums.corvetteforum.com/c6-z...xperience.html

But hey, you have about a 94% chance of your car not dropping a valve at "any" mileage, and about a 93% chance it won't do it in under 20K miles. At least, according to this poll. Start an LS3 poll and I bet you don't get anywhere NEAR that many who have dropped a valve.

 

I've been fortunate enough to own two LS2s Z51 MN6s and now an LS3 Z51 MN6. The answer to your question is YES. Don't take my word for it. Go drive the two if you can and see what you think.

 

Again, like I said before, your stats are FLAWED...and so is your thinking So you think every single Z06 owner on the planet is a member of this forum That is very very small precentage of the total population. That's like taking a poll on diversity of race in the USA and leaving out 30 states In that poll, how do you even know Every Single Z06 owner particpated or saw it? How many members on this forum have Z06's and did not particpate in it? I bet the stats would change.

And not one single LS3 has blown up right? How many people have blown up a motor but did not post up about it. Again, let's remember that not every vette owner in the world is on this forum. Also, you need to read the threads and information on the LS7's that have blown up, a majority of them have seen hard track time, are modded and have aftermarket tunes, that right there totally invalidates the reliablity because now you have 100 different shops and tuners toying with the motor and tweaking in ways it was not orignally designed to perform.

You base your information on " I have a friend that knows someone, or some 70 year old guy did this or that" or one random poll on this site. Not an accurate picture or information by any means.

 

My car's an 06' LS-7 and red line it all the time on the front straight's at open course track day's with no problem's. Know some of the 07's had supplier knicked valve spring's before heat treating, and could crack. Also, pretty sure LS-2's are only .1 second behind LS-3's to sixty, so could easily live with either one.

 

This 68 YO has not dropped a valve in his stock LS7, nor has any of my friends with Z06's, four of them. Not a daily driver, but I have put ~10,000 miles on it in the past two years, including running it at Talladega. I may be old, but I'm not slow(even my DD Mercedes has a factory blower on it; no Mini Van for me).

 

Some time back forum member 06quicksilver did some extensive research and came to the conclusion that the failure rate on an unmodified LS7 was less than 2%.

I'll take those odds........

 

But what about the LS-2 and LS-3 Corvettes? There is only a 36 difference in HP and the weights must be similiar between coupes. Can you feel the seat of the pants difference? Or what are the documented times?