Highlander,

I am pretty much exactly agreeing with you. I AM talking race cars and that's what a 500 RWHP 346 is. That is my point there. You can't make that much power with an engine that small with regular accersories on it at that low an rpm. There's alos a LOT of lying on the internet about CAMS and CUBES with the LSx stuff. The cams in the big horspower cars have gotten pretty big nowadays. I'm just saying that unlike what was alluded to earlier 500 RWHP is basically not something you will probably ever see at or under 6500 in any 346 heads cam car with that small a cam also.

Mindgame,

Yes I do still work there but I will be out the next two weeks and I'm mostly over at the new shop now. We will be running a lot faster now at SAM. We have converted to FAST and had some problems with the harness. At HRP a few nights ago we went 9.90s at 139 running a 1.6 60 foot or something (instead of low 1.30s) and missing at least one cylinder due to one of the injector wires coming off during the launch. It's been raining a lot since then but Jud will be out there every chance we get. Should run 9.30-9.40s now if we can stay under full power all the way down the track.

 

#1
http://ls1tech.com/forums/showthread...light=500+RWHP

#2
http://ls1tech.com/forums/showthread.php?t=122193

#3
http://ls1tech.com/forums/showthread...light=500+RWHP

#4
http://forums.corvetteforum.com/zerothread?id=742811

#5, This Z06 runs mid 10's
http://forums.corvetteforum.com/zerothread?id=739741

#6
http://ls1tech.com/forums/showthread...light=500+RWHP


Tired of looking, that should do it though, impressive no doubt.


David

 

this probally isnt what you want but i would just build a large big block with solid roller, some rather large heads, and stuff as much compression you can on pump gas to it, it would be cheaper and easier with less breakage... IMO, but i also favor big block because i have a big block 70 Xbody, which is almost exactly the same as the 1st gen you want to build and there is Oh so much room even with the rat, plus it looks like it belongs there like in Musi's old maro, popeye... but like i said that my own opinion what you do is up to you... either way good luck!

*eric*

 

Well I have already seen all of those and they are not making that power under 6500. Most are all out dyno trick runs with no accesories etc and electric water pumps and all could make more power down lower and nicer if they were larger than 346.

The LS1 IS a very impressive engine. I KNOW first hand since I've been around them forever. I guess we're arguing semantics here because I've actually been in some of these cars and I know they aren't real streetable to most people. OTOH you're right that there aren't any engines that could ever do this stuff with stock ported heads and even shifting at 7000 isn't really that high nowadays but reliability does go down real fast with rpm.

 

Erik, we'll miss you at the School, but at least your shop isn't that far away.

Mindgame, you were asking about the intake manifold earlier. Jud is now running a sheetmetal intake. That sucka looks mean! I didn't get to HRP when they took it, but I was told the best sixty was a 1.55. That car has gone 1.28 with a good bit less power.

 

Wow, lots of SAM guys 'round here. That's a good thing too.

I wonder if SAM would be interested in schooling an older stubborn guy like me?
Might be alot of fun........ for me anyways.

Thanks for the info guys.... especially the scoop on the new intake manifold.

-Mindgame

 

7krpm is not that much... Yes you can do a better job with more cubes.. but did you know what the 7L are saying??? you get only 70rwhp more... but you get 126lbs of torque more than the 5.6L but the 5.6 is a lot easier to pound and get an excellent time on it...

The reality is that CUBES ARE NEVER EVER REPLACED!! but it can be done 500rwhp w/o something really exotic. Im really impressed!!! REALLY REALLY impressed! 520 is unreal!

Now, I can surely understand what you mean.. the g5x-3 cam is too big for the street.. but there is not that much to be lost with a 228 cam which is the biggest I would go on the street.. Heck my cam is 224 on a 383 with lots of stroke... Still .. The LS1 is a 3.62 stroke engine that can stand pretty good duration... but anyways... if you can get 470s with a milder totally streetable cam... you sure can get those 580 FLYWHEEL hp on a 383 which was what fickle wanted... I think its not that exotic.

 

Highlander,

I'm curious to know if you've actually driven one of these 500 rwhp LS1's? Coming from a few guys in our Corvette club who have been around these ~500 rwhp "drivers"... they weren't all that "streetable".
Now this is them comparing the 346's to my car, so I founf it interesting.

And yes, 7k isn't all that high. Remember those commercials on TV about the number one killer of americans... heart disease? Well, Speedvision should make one about the #1 killer of performance engines.... valvetrain failure. You can really appreciate it once you've rebuilt a few expensive street motors because of it.

More cubes = lower revs for the same hp = more reliability.

-Mindgame

 

And I agree...

I got to drive one but it wasn't that extreme... I will be driving one pretty soon... although it will not be an extreme cam like those... I will not go over a 224/228 cam on my pops z06... Period

That should yield me around 460rwhp....

Mindgame... I dont see the components failing for reving 400revs more than stock... If the factory determined that that engine could widstand that much... 400 more isn't that far fetch even when you will be having lighter components and better quality valvetrain components, better rockers, lighter retainers (Ti), same sodium filled and hollow valves, hardened pushrods etc, good tuning and it should be ok.. FWIW I wont be reving more than 6700-6800 at most for that very same reason and just to be sure... It will be going in a 113 lsa to not have it that peaky. It will have its lope but it will still yield 29mpg on the highway (now im getting 35)

Besides Lt1s with head and cam are reving 6500 easy and that is an engine with a peak of 5800 stock? or is it all cam related tuning?

 

There is a buddy of mines stock bottom end LS1 in my front yard with a G5X-3 cam and heads and a six speed and a 3.42 gear, it is VERY steetable...... BTW it will take about 650 Flywheel to put down 500 at the wheel with an automatic. Which can be done with 23* stuff, easier with used 18* stuff IMO.


David

 

I'm with ya Highlander, using the latest technology in valvetrain stuff, 7000 isn't a tall stretch.

The problem most guys with a pocket full of $ and very little engine knowledge have is a lack of vigilance. They pay someone to build them a motor that'll turn the revs, has the valvesprings to do it, and they never learn to maintain the engine. The valvesprings can tell you alot and if you want a revver to live on the street you're gonna have to learn to pay attention to them. Then again, I'm really **** about valvetrain stuff cause it has cost me alot of money over the years.

Pays to stay on top of the stuff though.

And David, tell your friends to stop parking in your yard. That's what the driveway is for!

Later.

-Mindgame

 

what is incredible about the ls1s is that they are doing it with HR

impresive

Mindgame.. I envy your heads

mine flowed 298@600lift not bad though.. but still...

 

http://www.m2race.com/gm15sbchevy.htm

How fa$t do you want to go?

http://cgi.ebay.com/ebaymotors/ws/eB...category=33617

The intake is for sale too....

http://www.m2race.com/gm18sbchevy1.htm

and a smaller runner 18º...

-Mindgame

 

Damn I hate you!!! i should have gone that route.. oh well.. I will try these... im lucky I got boost it will still not replace those heads, because imagine the YSi on top of those heads.... only 10psi and WWWWUUUFFF 700rwhp easy

 

What do you guys (David) think about these???