lt1z28camaro

iTrader: (2)

I did heads and cam swap and didn't know what all could cuase my car to not run to it's potential. I think it's running lean up top. I don't think that really makes it suffer alot of power though.

I ran a friend in his ls1, with lid, catback, and short throw and I was right next to him. I just don't understand why the car is so slow still. I'm going to take it to get dyno'd this week. But I am looking to see if you guys have any ideas.. When I get at 5900rpm's it will miss sometimes. Like it's trying to hit rev limiter when it's set at 6500rpm's. Opti, Lean,...?

I'm just trying to figure out why the hell it's still so damn slow! lol

AChotrod

iTrader: (17)

It should be killing your buddy! Any messed up/burnt wires or did you crack a plug reinstalling them? Correct valve adjustment and pushrod length/timing set right, opti on right???

Im doing a similar set up and went with Delphi37#injectors Its what LE recomended to me.Im hoping for 400+rwhp with a 230/236 cam

robsquikz28

iTrader: (246)

did you tune it yet???

lt1z28camaro

iTrader: (2)

The valve train is noisy as ****, mainly on driver side though, i have tightened them down with it running might do it again to double check. Pushrods are 7.15 length I was told that they'd work fine with setup. As far as I know all plugs are good, wires are perfect. I timed it "dot to dot" so it's in the same position it was in with the stock cam. The car vibrates alot, tuner says it's cam surge though, which makes sense. That shouldn't hurt my power though.

lt1z28camaro

iTrader: (2)

Yes it's tuned, but I'm thinking something is wrong with the tune. My tuner assures me it's a good tune though..

meanredZ

That sucks man. You should have walked car after car on your buddy. It could be a number of things so it could be difficult to pinpoint what exactly it is causing a problem. Just double check everything you can think of.

AChotrod

iTrader: (17)

make sure the opti is on right and triple check all the plugs and wires for burns arching etc.

Elliott's94Z

iTrader: (12)

I say take it back to the tuner or to another one. Did you have a dyno tune? Yes, if your car is running lean it will affect your HP and how it runs especially up top at higher rpm's. Mine was suffering real bad not to long ago with the lean spike. Got her tuned just right now and it's a night and day difference. Feels much stronger up top.

lt1z28camaro

iTrader: (2)

I hope in my case it's about 100rwhp difference! haha. (wishful thinking) I don't really know what to look for as how the opti would be put on wrong.. I'll check the wires again here later tonight, but I looked at them yesterday and didn't see anything wrong with them at all.

It is a mail order tune, I emailed the guy yesterday and he assured me tune was good, but I'm thinkin he may be wrong, but who knows. I'm gonna take it to a dynojet sometime this week and see what they have to say and see what the graph shows me.. It's very frustrating to see a basically stock ls1 that I was right behind before and now it's almost as if I only getting power from the headers..

I didn't degree the cam when I put it in, I only put it on "dot to dot," I"m REALLY hoping that doesn't have anything to do with it. I DO NOT want to tear this bitch back down.

Elliott's94Z

iTrader: (12)

Bro, I would never do a mail order tune after a head and cam swap. Take it and have a dyno tune done and get some numbers. You gotta be curious what you are making after doing the swap! There's a ton of people that don't degree the cam and have no issues. You should be ok there.

kinglt-1

iTrader: (26)

I bet it's pulling alot of timing! Do you have a lt4 knock module installed?

AKAFRED

iTrader: (1)

no mail order can compare to a dyno tune..

get it on the dyno and see where your at.

Puck

iTrader: (17)

Look at the tune and ignition!

To cheer you up a bit, my stock shortblock cam was almost the same but more lift(.560/.570 and 110 LSA) and ran 11.7-11.9s consistantly with local shop ported heads that I doubt are as good as your LE2s and blowing through a little 3200 stall(was flashing around 3500).

Your combo has a lot left in it and will be an impressive street car once its dialed in to its potential

You need a logged dyno tune to see whats going on!

lt1z28camaro

iTrader: (2)

No I don't have one installed, It honestly never even came to mind. I'll be getting one asap. They plug into the directly into the computer correct? I've read of ones that go into the computer and ones that go into the engine block but am not sure if it's the samething..

lt1z28camaro

iTrader: (2)

Thanks alot guys, I didn't know what the hell was goin on after I talked to the tuner.. Figured I was basically SOL. I appreciate the help!

kinglt-1

iTrader: (26)

The lt4 knock module plugs right into the pcm. You still might have some false kr after the module install, but not nearly as much with out it. You also would benifit by picking up a set of lt4 valve covers. These quiet the valvetrain down alot!

lt1z28camaro

iTrader: (2)

I found the lt4km at ws6store.com for $57 is that about the right price?(I'm so broke after all of this but I need it running right!)With the lt4 covers do I have to do the cutting that I had to do to the stock valve covers to fit? I still don't understand why it's so damn loud on the driver side. I adjusted while it was running and it's still chattery as can be..

TABBED 5.3

iTrader: (1)

I would talk to Ion before you purchase that LT4 km, supposedly when you get a tune, it makes the stock knock module less sensitive. Not totally sure about that, just what i have read around here.

lt1z28camaro

iTrader: (2)

Thanks, I'll shoot him an email.

jarretthise

iTrader: (9)

what gears are you running? what gears is he running? is he m6 or auto? you might be running a little lean too...30s are kinda low for that cam i would think..pull your number one plug and see if your plug is kinda fowled out!!