fireburr

iTrader: (3)

Just got a ls1 swap finished in my 97 ta convt. Stock ls1 with magnaflow exhaust, longtubes, no cats, 3000 stall, a4, ls6 cam, and tune on a dynojet. 319 rwhp 298 ft/lbs Anybody have basicaly the same setup? and what are your dyno numbers and track times?

69cutlassrkt

do you have an ls1 or ls6 intake?

MikeG

iTrader: (33)

Mine made 372/351 thru a 12 bolt w/ basically the same setup. You're missing a ton of power. Did change the springs and pushrods too or just the cam?

fireburr

iTrader: (3)

ls1 intake, stock springs and pushrods. Only added the cam. Could the magnaflow exhaust be holding it back?

30th t/a

iTrader: (51)

The ls1 intake is holding it back alot. Im going to bet money that you did not move your rev limiter up either. The LS6 cam starts picking up power 4000 and up. You need to move your rev limiter up to about 6700-6800 to take full advantage of the LS6 cam.
You also need LS6 valve springs. 7.425" long pushrods are a good idea too. Some people get away with the stock pushrods though.

fireburr

iTrader: (3)

I'm thinkin it could be the intake too. I've seen some quite a bit higher numbers with ls6 intakes. They ran it up to 6500 rpms so I figured that was pretty close.

MikeG

iTrader: (33)

Your stock valve springs are binding with that cam.

caseypryan

iTrader: (10)

do you have a dyno graph?

hardcore4sure

iTrader: (1)

You need LS6 valve springs quickly or your gonna damage that motor.The intake is only 5-10rwhp. But the stock cam lift is .500 and the springs are only meant to hold that lift. The LS6 cam is .525 for the '01 and .551 for the '02 and up so it's the springs holding it back. I seriously wouldn't start that car again until you get the right springs. You may have already done some serious damage by running it up to redline on the dyno! Who put the cam in? Who dynoed the car? I can't believe nobody told you that you need to change the springs when doing any cam on an LS motor.

disc0monkey

iTrader: (10)

ls1 springs..ouch. dont run that motor anymore

VincesSS

iTrader: (1)

I'd say youre missing some power. Like others have said ls6 springs are extremely cheap and would work perfect for you and get an ls6 intake you'll pick up a ton of power.

mtuggle86

iTrader: (7)

Yes you need ls6 springs there only like 75 bucks get a set before you run it anymore. If your going through the work to install them though I would just install some pac 1218 springs though there only alittle bit more and they will give you room to grow if you ever decide to install an aftermarket cam. Stock pushrods are fine with an ls6 cam its lobes are not aggressive so the stockers should hold up fine considering they where used on the ls6 engines also. 7.425 pushrods are not needed ls6 engines used longer valve stems not pushrods there pushrods are the standard ls1 7.4 inch pushrods.

kinglt-1

iTrader: (26)

get some pac 1218 springs, 1.8 rockers, 7.425 pushrods, and ls6 intake... that will help a ton!

kinglt-1

iTrader: (26)

copied from TR's website:

LS6 Camshaft - 204/218 .551/.541 117.5 LSA Please note that this cam has approximately a 0.050" smaller base circle than a stock LS1 camshaft. This smaller base circle will require longer pushrods for applications with stock length valves and no milling for the head surface.

mtuggle86

iTrader: (7)

Ya your right if he's using the 02-04 ls6 cam with stock ls1 heads his valve stems are .050 shorter then the ls6 hollow valves so he could prob use the longer pushrods.

For the 01 ls6 through I don't think that's true since the 01 Z06 used the solid valves.

lemons12

iTrader: (71)

You don't need to spin an ls6 cam to 6500+ rpms. The marginal gains, if any, you would see wouldn't be worth the beating you would put on your motor.

evil02z

LS6 Camshaft - 204/218 .551/.541 117.5 LSA Please note that this cam has approximately a 0.050" smaller base circle than a stock LS1 camshaft. This smaller base circle will require longer pushrods for applications with stock length valves and no milling for the head surface.

with you current 7.4 pushrods you're not achieving the full .551/541 lift which is why your factory springs haven't broken yet. Replace the springs with either ls6/ls2 springs which are good to .560-.570 lift respectively & cheaper. Get the correct length(longer) pushrods . This will give you full lift of your cam at the valve & will likely correct the missing power.

HioSSilver

iTrader: (8)

Yea ya do. My limiter is set at 6800. Makes peak power @ 6400. Although I have a crate ls6 so the ls1 heads may hold his back a bit in rpm range. But I would think not more than a couple hundred.

fireburr

iTrader: (3)

OK talked to my mechanic about this, forgot the motor had a ms4 cam in it when i got it so the springs were ok. And we did get the right sized pushrods for the switch. I'm just a little paranoid with the sounds of this motor and longtubes how much different it was than my lt1.

lemons12

iTrader: (71)

Care to explain why most 228 and similar cam guys don't spin past 6500?
As stated, the small gains you would see wouldn't be worth the beating your motor would take at those rpms for most people.
I didn't say it wouldn't make power, I said there was no need.