Whiteaw57

iTrader: (2)

Just to preface I know I need to run the car at the track first and I have a feeling its gonna be stupifast but I was expecting about 15 or 20 more wheel HP. Here are the mods
Mods.
Drivetrain swapped from a 2000 SS
SLP air lid
85mm TB
Portmatched LS6 intake
Stock 853 heads
Lunati Dual Valve springs
Stock Rockers
238/240 dur. .608/610 lift 112 lsa+2 advance
Pacesetter Longtubes
ORY
3.5 inch Mufflex catback with a Cutout right before the bend to go over the axle
LS7 clutch
4.10 gears in the 10 bolt

The car made 399rwhp and I will post a dyno graph when I get it. Haven't even picked up the car yet just talked to the tuner on the phone. Ive seen one car identical except for 3.90 gears made 403. But a buddy of mine with 3.42 gears and a 233/239 114 lsa cam made 403 as well. Just wondered if the numbers look ok. I NEED heads in a major way and they are planned. Going with ported 243s with as much compression as I can to help the cam. Anyway I dont want to ramble. Just let me know what you think.

Thanks!

LilJayV10

iTrader: (39)

I'd say that's pretty good for just a cam and bolt ons. That's a pretty big size cam. What RPM did it peak at and what was the torque. I'm guessing it's a 6 speed?

thunderstruck507

iTrader: (18)

Looks normal to me. The graph will tell more.

reeperz28

iTrader: (1)

That seems on the money to me. What kind of ory do you have.

s346k

iTrader: (4)

got a graph?

i don't see why you'd be upset with 399whp from a cam only setup. i've seen weird results come from non-stock mafs.

dynos are tuning tools. take it to the track before you let your peter go limp, i've seen 400whp cars trap 118 in full weight cars and i've seen 400whp setups trap 111 in full weight cars. only one way to know where you stand.

Whiteaw57

iTrader: (2)

Im going to the track tomorrow. After talking to the tuner he said he was actually expecting less. I guess I was hoping for that magical number somewhere over 400 so 399 was a buzz kill. Car runs amazing now so I think its just a little lower than I wanted but right on the money. The tuner said the cars Id been comparing to probably had a FAST intake and I obviously only has an LS6. I did get some valve float around 6700 but I that was expected. Cam pulled to that point for sure though! Limiter is at 7k Im gonna try to shift around 6500 maybe 6600 max.



thanks for all of the replies guys, sorry it was for nothing!

LilJayV10

iTrader: (39)

What are your springs set up at? Power kinda nose dives at 6500 or so.

Whiteaw57

iTrader: (2)

Springs are Lunati Duals. I think the weight of the LS1 valves and the steel retainers are whats getting me. I went with duals for reliability and I dont mind giving up a little up top. Alvin said it started to break up at 6700 the graphs obviously a tad hard to read but no biggy he said he wouldn't be concerned at all. Just next valve spring cycle I'm gonna get some titanium retainers and try to lighten it up a bit. Not to mention I will have heads with LS6 valves going on at the time as well

LilJayV10

iTrader: (39)

What's your spring height set at?

Whiteaw57

iTrader: (2)

1.81 but he also pointed out I only checked it on a couple. Next set will be checked on all 16

LilJayV10

iTrader: (39)

With your cam only having .612 lift you might need to reduce the height to increase your spring pressure some. That might help with your valve float issues.

I know those springs are to be setup at 1.81 so I would definitely check with lunati or your cam manufacturer.

Whiteaw57

iTrader: (2)

Interesting thought. How much would you take it. The springs are good to .660 lift 0.030 shim?

LilJayV10

iTrader: (39)

Yeah I was thinking .030. Again I would check with someone way more knowledgeable than me though.

I'm trying to figure out my valvetrain issues on my car and have learned A LOT from Shane@Thunder Racing in the past few weeks on how the valve train should be set up. Why the info isn't more widely known I don't know.

LilJayV10

iTrader: (39)

I had to write the math out because i was confusing myself.

1.81-.612=1.198 A .030 shim would put you at 1.16 which is damn close to the 1.150@400 lbs. and that would give you the .060 you need for coil bind which is 1.100.

Given this is all just numbers on a screen and what it actually turns out to be might be more or less.

Also what length pushrods are you using and how much preload do you have?

Whiteaw57

iTrader: (2)

7.4s dont know the preload but its perfectly quiet so its perfect preload as far as im concerned haha

Whiteaw57

iTrader: (2)

im guessing about 0.035 based on what my buddies gto came out to

LilJayV10

iTrader: (39)

Well each car is different as is each cam and so on. LS1 lifter preload is .040-.080. 1 1/4- 1 1/2 turn from zero lash to tight should be close to where you need to be.

Whiteaw57

iTrader: (2)

I honestly have never checked it. When i bought the car it was cammed with stock pushrods and was quiet so i put 7.4s in it. Then I changed to this cam and it was quiet as well. So not sure but it runs great

LilJayV10

iTrader: (39)

Except for the valve float.

I would check it but that's just me.

Whiteaw57

iTrader: (2)

The preload isn't causing the valve float. I kind of expected to see some with my heavy valvetrain but I also didn't expect him to turn it 7k. I wasn't honestly to fond of that.