Yeah prolly... But it should be no issue, unless the mods i did caused the issue and they can prove it lol

I.E. if i have a ABS issue or window motor go, they would still cover that regardless of engine mods.

 

Hey BADD... thanks for the write-up on the motor mount mod... I just did it!! Piece of cake!! it was easier than putting in my CAI setup... LOL

I took it out only for a short blast down the road (wife is working late tonight, so I'm with the kids) - but I have to say it's DEFINITELY an improvement! It feels a LOT more solid with that switched around... no monkeying around, you gas it and it goes... pulls even harder on take-off and still harder romping on it from a roll.

At first it made me nervous - dealing with engine mounts - but it was all good, nice and easy... it's stuff like the rockers and springs I wouldn't/couldn't do myself... anyway, I don't know what those 2 motor mount bolts are supposed to be torqued at when tight, but I can tell you that the service guys probably wouldn't be able to get them off now... LOL I made sure those suckers were TIGHT when I put it back together - don't want that coming loose or off when driving! LOL

Thanks again man!! Awesome...

 

also include the fact that the LS2 cam was free, and he actually coulda used my stock ls2 springs, (which are the GM yellow) and he could have save $170, but i have a feeling he just gave it room to grow, but knowing him he might just be considering something slightly larger but lower on the lift side.

Hell the cam he's put in my GTO (228/230) would work easy w/ the low lift.

either way, you can pretty much garuntee he'll have no problem for warranty anything, though if they take it for a test drive they'll wonder why it's so damn fast.

the stock LS2 cam has no perceptable lope anyway. Funny, he's going to be a groundbreaker in the LS4 group here and have spent very little.

he could have gotten a larger duration cam w/ low lift and spent around the same he would have for rockers. But i can see his reasoning as he wants to toy w/ keeping the DOD. if it don't wanna work w/ the LS2 cam, he could swap the rockers and see how it would work w/ the stockers and lower lift.

just keep in mind this cam and the 243 heads produced 385chp on a 5.7, and 400chp on a 6.0, theoretically "should" do an easy 345chp stock, but he's also tuned it, and helped out the intake and exhaust flow so i could see it doing 375ish crank or a good 300 at the wheels. and many of us know it takes alot of **** to a L67 to get 300 at the wheels.

bravo tom, glad you're trying to make sure some of the best LSx powered cars in the milwaukee area are coming out of Washington County, between my goat, your camaro and monte, and Joe's Trans Am

 

oh, and I added this thread to the top of my bookmarks, so when I get the cash I can refer back to it for more mods!! Thanks BADD!!

 

Only if something went wrong and the dealer could prove that what you added/changed caused the damage. Like if you had the rockers in and had problems with you suspension then the dealer could not say that was the cause. But if with rockers something happened say like a spun bearing then the dealer could say the rockers or other engine mods caused the problem then they could deny fixing that, but not void the warranty. I strongly recommend everyone look up the Magnuson Moss Act, its a federal law that prevents dealers from voiding warranties and protects the customer.

Badd you really should find a dyno, hit it with the mods you have to see a difference in what you have done the again after the cam. I'm thinking after the cam you should be putting down around 325 to the ground and around 300-305 without the cam but with what you have now. Not to shabby to have a FWD making 375-395 at the crank. Time to start saving the pennies for a tranny and a trip to Intense or ZZP.
Tate

 

even if you have an engine problem they will have to prove without a any question that the mods you did caused the problem.

 

rockers, catch can, shift kit, and some other stuff goin on this weekend at some point.
just got the car back from the dealer. should be a fun weekend for me at least.
moving the mount around while im in there. im glad someone else is taking the test monkey position over. makes my life easier

 

the dealer is still gonna deny warrenty if u have engine issues and u have a cam and rockers and what not. when we call GM technical assistance center , one of the first questions is do they ahve anything aftermarket wired in if its electrical issue or added to engine if its engine related. if so its gotta come off to continue with the car. i had a guy with a lucern and his garage door opener built in to the car wouldnt work with hsi garage door, and when i called gm T.A.C. they said look for any aftermarket accessories and if there are, they gotta come off before continuing with the issue. he didnt ahve anything but if he did, we would end up charging him labor to take it all out before we work again under warrenty

 

And I was pissed GM released the 70K warranty a month after I bought my MCSS ...

 

70K???

It's 100K...

and yeah, I was pissed too... granted, I got mine back in 2005, but hey - nothings changed between the '06 and '07 - so why not make it retroactive!!

 

I usually burn my warranty books on most cars ive owned....

If the trans goes, i will rebuild it my self... Why put another stock one back in you know?

 

Well i was able to try the 6500 RPM shift points and get the tune up squared away, it didnt waiver much from prior, couple percent extra in some areas... nothing major.

But the car is an absolute weapon! That 6500 shift point for the 1-2 is perfect @ 57 mph and now it never stops pulling! That bog is completley gone and the car just pulls hard all the way to that.

If i had to guess it prolly would churn out 13.50's with blah 60's right now and 12.90's with just an ok 60'. This thing fookin hauls the mail now!

 

and with that, im doin my rockers tonight, shiftkit tomorrow. because frankly, the car doesn't feel fast anymore to me, even after driving the buick rental car for 4 days.

have you checked your manifold for oil residue yet? seafoam fun!

is there really that much of a difference in changing the springs and pushrods vs the stock?

to me it would seem silly for me to do it right now, im not revvin past 6100. dunno. guess it could be done for future cam install.



yes i do read, im just validate another 300 dollar purchase if it doesn't benefit anything

 

Well if you only want to spin it to 6100... Dont change the springs. However its kind of a moot point if you cant spin it to 6500, as i really didnt feel much of a gain on the rockers alone.

Since the springs it has gotten torque all over the place under the curve that can be felt and now im able to pull it all the way to 6500 where it wouldnt go with stock springs, where now im getting a bennefit of now lay down on the shifts and means no more lost races with an equally matched car at that point.

Intake is bone dry, plugs are beautiful when i had them out (TR55's) No oil usage in between changes that i notice anyway.

 

you are an evil monkey you do know this right?

 

How fast do you wanna go? How much money do you wanna spend?. Some spend less and go faster than others when they buy the right parts the first time...

 

true
i see it daily at my work


cheap
fast
reliable
pick two.

 

LOL - 100K!!!

Agree! I've had 4 W-Body's since '98 w/ no break downs. It's a solid platform. Would figure since this was the only car I bought to keep long term.

 

Hey badd, what model spring compressor did you use? was it the CRN-99472-1 or the 99473-1.

 

I am all new to the LSx engines, last SBC I swapped springs/rockers on was a '95 LT1 and that was pretty easy. (aside from the number 8 under the heater box that took longer than the other 7 cylinders combined to get the keepers on...so very much cursing!). The spring compressor looks like it would do two at once, very handy looking tool.

Anyway, I am a fan of the behive type springs to get around any harmonics without the cost of the dual springs and will probably get bored this Summer (after figuring out/repairing the 238K LT1 in the big Caprice) and go ahead with the springs and rockers in the little SS. My questions are pretty basic and I figure that a bunch of folks have similar ones.

Tweaking the PCM, taking out fuel and adding timing, pretty much a given on the safety tune that GM puts out. I am used to the OBDI and using the laptop to monitor and adjust the parameters. It seems that there are now handheld units that will do a decent job instead, however there is no (that I know of) wideband measurement using these things and I have my concerns regarding relying on the stock O2's for feedback.

Am I five years behind the times and just need to get happy about it, or are my concerns valid?

Secondly, the relatively high flowing heads on the little LS4 make me worry that increasing lift on the exhaust side is going to cost me low and midrange power due to reduced velocity during scavaging. I can spout cam design theory until most of you would puke with the boredom, but, as usual, theory is a poor way to chose valvetrain timing compared to plugging one in and seeing what happens. Theory says that on a non-split cam there is about a 50-50 chance of loosing low/mid power with higher lifts on exhaust vs stock. With a split cam, theory says almost always lower power with higher lift vs longer duration on the exhaust.

Anyone done any measurements on swapping out only the intake rockers and leaving the stock exhaust rockers vs higher lift all the way around?

On the LT1, it was a simple matter to turn the engine until TDC on each cylinder, then letting the valve drop the 1/4" or so for valve spring swapping, is it the same on the LS4?

The stock valve seals good enough to leave, or should I swap them out as long as I am in there?

Last question for today; I have not delved into the engine bay as of yet, but recall (with not much fondness), the trouble I had even touching the rear plugs on the V-6 GM front drivers my parents have had. What kind of view/access is there to the rear bank?

Thanks for reading, aside from the springs/rockers I will probably (famous last words...) let the little car alone, at least until I see what it takes to rip up the tranny from the...shall we say...more energeting moders.

Although, never having had forced induction, and as I like to tinker with my toys.....I guess we shall see what the aftermarket comes up with in the future.