Haha, no the stock valvetrain will not handle 450whp. At the absolute very least you'll need springs and retainers. As for the motor you'll need more than pistons/sleeves.

 

if so then ill just plan to be at 400whp. seems like people are there on stock motors just fine

 

I'm sure it could never bad to upgrade though especially when it's only a few hundred to do so while it's already open

 

Okay, got a problem. Today on my way to college, i pull onto the highway and i do a 2nd gear pull into third. All of a sudden, it feels like my car hit a brick wall. Sputtering badly when accelerating. Manage to get into a parking lot off the highway, and look under the hood. Nothing is loose. No smoke, No weird smells. I couldnt be late to class so i got it to make it to school which was about 10 min away. after class i had to get home and it made it home. checked the plugs, all of the intercooler connections, literally everything is normal. What could this be? Once im over 3500 rpm and you give somewhat of alot of throttle it boosts like normal. Very rough idle. When pressing the throttle steady, it idle surges up and down. Cant seem to figure it out took all the piping off and checked for anything. Absoutly nothing. Any ideas?

 

that kinda sounds like when i blew off my charge piping lol. but then you said you took off all the pipes...check your couplers, one might be cracked, causing a boost leak. did you noticed any smoke while driving?

btw have you tuned the car yet?

 

Boostpro.net : Products - Boost Leak Testers

 

O2 sensor? When mine went it wouldn't idle. Didn't matter if the throttle was pressed or not. Was it raining? If my car sucks water in it doesn't spool because the maf gets wet it just over fuels like crazy and cuts out.

Do you have any dtc's?

If it still spools above 3500 and doesn't take longer than normal i wouldn't say it's a boost leak

 

-___-

just some fun. never went wot or opened the wastegate so around 7-8psi

62mm Cobalt driving - YouTube

 

It was the MAF sensor. I unpluged the sensor and the car actually ran better. I bought cleaner and just sprayed it down until the can was empty. Fixed my problem! After taking all the piping off, checking every connection, tightening all the sensors, and I even cleaned the injetors! After all of that it was the MAF needing a cleaning...

its perfect now.

 

Something i noticed while cleaning my injectors was that in cylinder one (Or the one on the left) there was an extra 0 ring. all of the other ones didnt have it. It was floating around in front of the injector almost falling into the hole. :? Oh well i didnt put it back and it runs normal.

 

glad you were able to fix it

 

umm... yes it is possible to make 450whp on a completely stock valve train in an LSJ. It is possible to make it on a completely stock LSJ from valve cover to oil pan. Its been done more than once... The other stuff is not needed but is a good idea if you are going to be building it. There are a lot of other factors that will affect if you get there or not. What fuel? return style or dead head? what size turbo? what boost level? how much abuse? etc.

l8r,
PD

 

all those bumper stickers on the white cobalt...holy gayness and i wouldnt expect a lsj owner to allow that kinda madness in the driveway lol

 

ok so all i needed to replace in my motor was the pistons and i got forged ones, arp head studs and new gaskets. im not trying to spend more money then i have to but id like to see over 400whp. i plan on using the 252et and i havent come up with all of my fuel solution yet but ive gottn 80's

 

its my sisters. she's a tree hugger.

 

I wanted to know the same thing.
I'm going to b running e85. I do.have the zzp brfps. 252et turbo, boost level would be......idk...20+23psi?

 

finally lol can't wait to get the tuning done and slam it to the floor not this teaser 5psi bs hahahhaha

05irl base tune zzp turbo - YouTube

 

so no vacuum on it? Any particular reason for that? Also, do you think you could give an itemized description of your breather setup?

heh, just noticed you were also running the green juice...

 

the green juice?? the coolant?? yeah i just switched over to the winter mix.

i may try and get a vacuum pump on there but we'll see how this works. no problems so far.

Metco -10an oil cap fitting
allstar dual bung catch can
3/8npt to -10an fitting
3/8npt to -8an fitting
90* -10an swivel
90* -8an swivel
6' of -8an and -10an Jegs pro flo 350 series hose

 

btw. any of you know this guy?? he wants to race me in his stock turbo lnf

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lol a stock turbo lnf? i feel very bad for the trains he'll get.

 

facts dont win races guys! haha Silly stock turbo LNF owner. Put your car to 10 psi and dust him..

 

haha yeah. my response to that guys' "facts don't win races" was just simply, "but 591whp and 477ftlbs does"

and i probably could nls the car on the pump gas tune. i'd just rather not chance it. but if i did while racing. talk about a raping.

 

Awesome!

 

BTW what is with the speed limits in your town? Down here in FL that would cause an uprising lol.