cobalt_sport08

iTrader: (1)

Where yall at I gotta question.

I have the 08 2.4 with an auto tranny and my internals AREN'T forged like the 06-07's are apparently and im wondering how much boost is safe/ yall running on stock internals.

I'm still on a stock pulley @ 6ish psi. my IAT2's dont get about 120 at WOT doing 110+ mph.

I want to drop to 2.9 so i figured that would bump the boost up to around 10-12psi but my motor is already high compression and dont want it to blow obviously.

Thanks in advanced.

cobalt_sport08

iTrader: (1)

BUMP

anyone have any input on a "safe" number?

Thanks

Jacob4ta

iTrader: (1)

I've always read to keep boost under 12-13 psi on a stock LE5. A 2.8" pulley will put you between 11-12 psi depending on elevation.

Twoozofjuice

iTrader: (7)

Depends on exhaust as well. I was at 15-16 psi on my car lol. 2.9 pulley

cobalt_sport08

iTrader: (1)

Its a badmab header then 2.5 zzp exhaust. And were your internals forged?

Twoozofjuice

iTrader: (7)

if by forged you mean 06 model then yes. lol they aren't fully forged but yeah..thats the setup i ran as well. badmab, 3 inch with 2.5 exit zzp catless dp, 2.5 inch zzp exh

cobalt_sport08

iTrader: (1)

true I've just heard that they're better than my 08 :/ and I don't want to put another grand into the car

Twoozofjuice

iTrader: (7)

pick up an 06 at a junkyard and throw it in there

Jacob4ta

iTrader: (1)

I make 12-13 psi with a 2.8" pulley, stock head, zzp header, 1.75" pipes, 2.5" catted dp, zzp 2.5" cat back.

cobalt_sport08

iTrader: (1)

I see your on meth as well tho.. keeping your temps down. and i just saw your post up top and i live in FL so lots of oxygen lol plus right now i have a shorty header and 2.5 catted but i want to run the midlength with 1.75" primaries as well.

what are your IAT2's?

does a more flowing exhaust knock the boost down a little?

Verbatim

iTrader: (1)

you'll be fine with 2.9 pulley
its all in the tune

my 06 has 85K miles, over 40K boosted
I daily it on 2.6" tvs pulley, 20-22psi.

cobalt_sport08

iTrader: (1)

damn lol im at 993xx miles boosted for about 15K doing good do far

Jacob4ta

iTrader: (1)

My IATs climb to roughly 113* then start to cool off at the end of my pulls and get down to 105-109 range. I've never been boosted on stock exhaust so I'm not sure.

On a stock pulley I made around 7-8 psi with stock car back and ZZP header and downpipe.

cobalt_sport08

iTrader: (1)

https://www.dropbox.com/s/b6inf2ghf3...30645.mp4?dl=0. If anyone watches that I don't get on it till 27secs

This was from the other night. My iat2 were 111° @120mph and I have a 2.5 full exhaust

And my gauge only reads about 5-6 but my app(computer) says 8-9. and same at idle is 3psi difference. So idk which is right

Jacob4ta

iTrader: (1)

At idle you should be around 18-21 inches of vacuum depending on elevation.

cobalt_sport08

iTrader: (1)

gauge reads 23ish and app reads 17ish

ccundiff72

I'm at 8 psi..w/2.5"Borla catback..Hahn Stage II turbocharger kit..stock rods/pistons...though I'm currently working on getting the bottom end forged...I don't have any trouble with the stock stuff fire the last 20,000 miles.

cobalt_sport08

iTrader: (1)

Its allliiiivvveee....

So got my hands on a 06-07 LE5 and I want to go turbo now.. While its out should I throw some rods in it + pistions. I'm wanting to run the bullseye 256 maybe ported head and intake mani with full 3in exhaust.

Anyone have a similar set up?

DFZ24

iTrader: (5)

I'm running s256 non extended tip, zzp air/air kit. But manual. 3in catless dp, stock exhaust part, CTI over the axle 2.5 with lnf muffler.

cobalt_sport08

iTrader: (1)

And I just saw chaos six turbo build..


How much boost?

goaliemo

iTrader: (1)

Ahh, I was just about to say I have a 2.9 and/or a 2.8 I could sell yuh.
Going turbo now, very nice.
Have fun with it

cobalt_sport08

iTrader: (1)

I'm throwing the 2.9 in a few weeks hopefully IF MY TUNER WILL GET BACK TO ME.. lol

goaliemo

iTrader: (1)

Don't know if I told yuh, I decided 2.7.
Should have some nice little get up to her.

Ill have to come out your way soon, im sure its a lot more fun out there.

DFZ24

iTrader: (5)

was 10psi, then 15psi, then now back to 10psi clutch didn't take it well lol
so when i get a new clutch i will go back up to 15psi

Twoozofjuice

iTrader: (7)

I'm on a s252et on 12 psi and e85. The 06 can take a hell of a beating.