paladineWS6

So I purchased a suoer slow ws6 trans am 3 or 4 months ago that needed an ac clutch, new fuelpump and it chatters some times when I shift it but I got it for 5k it came with what the owners said was torquer v2 cam, he said slp headers but theyre hookers, ls6 intake, ported 243 heads, 3 inch straight pipe with slp muffler and slp tips. The car before the furl pump made 230 or less hp after it made 290 hp.... but we all know this set up should atleast be giving 350+ whp right? So another member here mentioned maybe it needs new springs? I talked to the owner today and he said and I quote " when we put the v2 cam and 243 heads the springs that came with the cam didnt fit so we put "bigger springs" and then it worked" so I dont know what the culprit could be dan maslic of masport saw from the dyno tune that the fuel and air ratio is good the spark was good but I need a new battery and my exhaust is resticted which I have a system on its way so would springs cause valve float? If so whats a good spring to get for 243 heads torquer combo and would this really cause a 100whp difference?

SilverSmoke

Torquer2, longtubes, lid, pulley should be hitting the 400rwhp mark on an M6.

How does it feel down low in the rpms? Car smoking at all? Oil clean? Odd noises?

paladineWS6

Down low its sorta slow but if I gun it it will pick up then start feeling fast I read this is normal with the v2 cause its an upper rpm band cam? It does make a crunching noise sometimes on the driver side floor but I habent heard it in a while the engine is very clean and from the dyno dan said the engine has a constant hp reading that means the engines healthy its not fluctuating curves and I forgot it has a lid lol I know its not a big difference also whwn it was tuned up on the higher rpm when the tune was finishing up the car would start throwing out black exhaust smoke

ls1 1990 VN

The wrong springs, A weak spring, After market Roller rockers, maybe heavy valves,

paladineWS6

Thanks so maybe the springs are what are killing the HP? Which springs would I need for my set up?

Burken01

iTrader: (88)

Try Brian tooley .660 platinums..

Who did the tune on it? Something's off and I wouldn't be driving it till its fixed..

vettenuts

iTrader: (4)

First, if you suspect that the valve train is not properly under control you shouldn't be revving the motor that high until the valve spring situation is resolved. Second, if you suspect the valve train is not well controlled and have revved the motor than a compression check is in order to ensure you haven't tagged any valves.

Loss of valve train control will definitely result in low power, unfortunately it can also result in mechanical damage.

Do you have the dyno? Valve float will show in the dyno curve if that is what you suspect is the issue.

JakeFusion

iTrader: (7)

You're at what 230?

You should be at 430 with ported heads and Torquer 2.

This is why you should not invest in a modified car unless the owner actually knows what they are doing. It sounds like the cam was installed a tooth off for the power to be down that much, you may have tagged a valve which would result in a loss of compression/mechanical damage as stated by vettenuts, and you probably have the wrong valvesprings and/or pushrods in there.

All in all, it sounds like you need to take it to a competent shop and have them go through that motor.

TurboBuick6

iTrader: (2)

Sounds like more than a VS issue.

paladineWS6

Wow this is all sounding scary well the dyno shows the cam dip then it goes up but at around 5k rpm the curve goes down like it loses power after 5200rpm but the tuner told me it was the exhaust I habe the dyno curve printed ill try to post the picture

JakeFusion

iTrader: (7)

Even the stock exhaust would not limit ported heads and a 232 duration cam to 290 rwhp.

Sorry, reread where the fuel pump was an issue for 230... but even if the fuel pump was an issue, it should still get you to 400rwhp... unless it was crapping out big time.

You need to stop winding it up and have it checked over. There's something off in the valvetrain setup and repeatedly spinning it up on a dyno is only going to expose the problem in a bad way.

paladineWS6

Lets see I took pictures of the dyno sheet I don't know if it will help but ill post it









okay here it is

JakeFusion

iTrader: (7)

Normally I just upload to something like photobucker or imageshack and embed it here.

Your HP is peaking at 5500. That cam is installed a tooth off. It should peak about 800 RPM higher.

SilverSmoke

What's the AFR at during the pull? I see 7.3 on your sheet, but I'm hoping that's not the case either lol! I'd think if your fuel pump is not up to the task, then you'd lean out at higher RPMS. Just my opinion, but seriously doubt your fuel pump has anything to do with it unless it's dead or dying a bad death.

My fuel pump is stock and runs fine to 7krpm, pushing 466rwhp with the Tqr2.

You have a lot of work ahead of you. Make sure to deal with a good shop. Jake is likely right, cam is off, and with that, could be more issues...

paladineWS6

So the cam should be reinstalled?

Would the car even run if the cam was installed run? The engine runs good from what it feels like lets see what hapoens after the exhaust I change out and maybe after a compression test

SilverSmoke

I think you have some very good advice from people. Just find someone reputable to work with who can diagnose the issue. There's a number of factors that need to be looked at. Start with leak down and scoping the cylinders and go from there.

paladineWS6

Thanks so much ill check compression first and let you guys know what I find so anyone else can search this for future reference and ideas if theyre going through this too but I searched low dyno numbers and some guys are having the same problems with cammed cars

ls1 1990 VN

This is not a compression problem or need for any leak down check.

This is a cam & valve train issue.

Not sure on why it has such low HP at that rev range but like Jake says, maybe tooth out.
Definate valve spring issue though, go with BTR .660 Platinum

paladineWS6

Thank you judging from previous owner staying"Springs that came with cam didnt fit so we used"bigger"Springs" Im guessing that might be the culprit so will those Springs be good for my combo?

TurboBuick6

iTrader: (2)

Dont just start thowing parts on it. I would check things first. Check pre-load, valve spring pressure, rockers and so on. Might be worth degreeing the cam too just to make sure. You will end up spending a ton of cash just replaceing everything.