Rob Raymer 2

Pretty sure they're sponsor's here. Fwiw, I just googled the springs and they were the first to come up. I have no dogs in this race.....

http://www.lmperformance.com/5031/1.html

Starsky

The same yellow car that has self made valve reliefs on 2 cylinders?

A little word of advice, next time you work on someones car don't claim that you own it cause you worked on it. I house sit for my sister all of the time. I don't claim that i own her house.
Dont pretend to be something you're not. Just be who you are. Thats what's really cool.

winters97gt

Thanks, but they don't have overnight shipping, I'll find some now that I have a part number! Thanks again!

winters97gt

Got the parts ordered!

black98ws6ta

iTrader: (77)

It takes about 30 mins to find out if the cat's look good or not. Then move onto move onto valvesprings. Its obvious he has been making pulls on the combo without hurting anything. We are saying the same thing just in the opposite order. If he is in a pinch for time and ordered the springs then he has everything he needs to look into both possible issue's. I was just stating there are ALOT of supercharged cars not floating the valves with stock springs. Not saying he doesnt have a weak set obviously.

Bob@BruteSpeed

iTrader: (16)

For what it's worth, I've had very few problems with centrifical superchargers and worn out valvesprings. The cats would be the first place I would look too as back at the old shop we often found clogged cats on forced induction cars. You'd be surprised at how often we'd have cars spitting out pieces of their cats right on the dyno. Bob

Rob Raymer 2

True, but I just don't understand why you would want to risk this guy's engine by pointing out a SC'd C5 that you said "is running fine", yet the valves hit the pistons and damaged his engine because of his LS6 valvesprings. And we BOTH know this guy personally, and we BOTH know it just happened! You obviously didn't realize it, but it's common knowledge around town now (and was even before your post).



Actually Bob, I wouldn't be surprised. I've been seeing the exact same thing for over 10 years now, which is why I said I never like to use cats on boosted cars unless they are required (emissions issues, etc.). But in trying to diagnose his specific problem, I don't believe it's being caused by the cats. Simply because of the drop in power at the exact same rpm every pull. But I could certainly be wrong.

lt1773

iTrader: (1)

why you did not order Patriot 8501 ??
same price to can handle up to 660" lift
this is just suggestion

2001WS6Vert

From what I've seen on here usually the dyno graph gets choppy up top when the car needs valve springs. True or not?

Rob Raymer 2

That seems to be more the case with NA engines in my experience. Boosted cars usually look more like a "drop" in power on the graph. My guess is that it has to do with the fact that most boosted cars pull through rpm's faster, leaving less dyno sampling time for it to look choppy. But again, these are all just my opinions.

Rob Raymer 2

Here's a thread from nearly 3 years ago in which I posted that valve springs were the problem with the car. He's turbo'd with ls6 springs and his power also just drops off on his dyno graphs. He was super reluctant to replace them and spent nearly two months trying everything else. Patriot Gold's took care of it. Just sayin'.

https://ls1tech.com/forums/forced-in...-diagnose.html

Mike TexaSS

iTrader: (2)

Trust me its valve float! Ls3 valves are heavy. Car pulled fine until you added more boost.


Also pushing lots of fuel through stock manifolds and cats on a boosted car is asking for problems.

Mike TexaSS

iTrader: (2)

Trust me its valve float! Ls3 valves are heavy. Car pulled fine until you added more boost.


Also pushing lots of fuel through stock manifolds and cats on a boosted car is asking for problems.

Rob Raymer 2

Word.

B Neat

Just who are you and what do you know about my car? You obviously have second or third hand misinformation from someone who doesn't know dick about LS motors. If it's who I'm thinking of, they looked right at my biggest power secret and didn't even realize it!

My numbers 5 and 7 intake valves crashed over three years ago because of a 4-3 UP-SHIFT! Shortly after that I changed to LS6 springs and replaced the two mangled push-rods for those same two valves. And even when I did that Anthony warned me that those springs just weren't enough, not just because it's supercharged, but because I drive it on the limiter all the time. Now it's become even worse, not only do I continue to over rev the **** out of it, He's got it making so much more power the LS6 springs don't have a chance. But that will change soon, Anthony just bought me a new set of springs, in fact he's given me a lot of parts for my car. So if he refers to it as his, I can understand why. Even though he's never once driven the car, not even on his dyno.

Your one and only post was to call out a shop owner because he said "I've got a C5"? I called Napa and said "I've got a 2000 Ranger and I need a set of brake pads for it"...I really don't own a 2000 Ranger, it's my Dads truck, so shame on me for pretending it's mine.

winters97gt

Mike, it wasn't valve float. It was the cats. We replaced them with stock cats. Actually called Robert on Thursday to see if you had some laying around to buy, but we found some at the shop. The springs I bought will go in with a custom baby cam or ZR1 cam. I'll probably add exhuast at the same time.



Got in one pass tonight, clutch only had 250-300 miles on it. Spent all night on Thursday trying to break it in for the dyno above tonight. Headed out to the track, only got in 1 pass and they said no more. Baby launch.



http://www.youtube.com/watch?v=hkpqz3T6ltc

Probably could have got it down to a 10.3 or 10.4, but the officials said no more. I'll be running at HMP to get used to the car since this was my first time to launch it. Then I'll add some more power and see how deep in the 10's I can go on the stock block.

Thanks to everybody that posted in here!

Bob@BruteSpeed

iTrader: (16)

Good deal, I'm glad you got it figured out! You'll drop a lot of time off that already great 1/4 time just be getting more time in behind the wheel at the track. Bob

winters97gt

Thank you! I don't have a problem rowing the gears. Not a good or great driver, but ok at it. As you said, a little seat time will help. I went through 3 rear ends in one year on my z06( 2 built RPM ones), from high RPM launches, so I am really trying to avoid it for now(fiancee). I know launching these cars with the stock diff/tranny is risky stuff, especially with a little more power. We have a good 1/8 track on Sundays here, so I'll be practicing the 60ft.

BTW, love the ACT twin clutch. Affordable, feels great on the street, and felt fine tonight.

Mark

98Camarod

iTrader: (43)

Good advice. Along with the A/F, you do the same with timing.

98Camarod

iTrader: (43)

That thing is running hard! A 7.0 with a 108mph trap in the 1/8th, you're missing quite a bit in the launch. Once that thing gets going though, it rolls out!

I'm sure you'll be surprised when you put headers, cam, and valve springs on it!