what is the highest horespower you can run on stock internals??

 

Somewhere in the 300-350 hp range... but with these cars as they are all DIFFERENT it is truley unknown!

Use the search button this has been discussed plenty of times!

 

I would say around 290-320 if you have it tuned properly and your car was built by the hand of god haha.

 

Werd!

 

Werd! BTW these are Whp figures!

 

thanks guys! man thats what i like about this site. i ask a question and LITTERALLY in less then 5 min i have my answer in 3 - 4 different ways! its AWESOME!

 

No problems man. If you really want to be "reliable" shoot for the 265-275 Whp range.

 

Stock pistons are NOT rated to make 300hp, GM says so themselves... so you get around that mark on stock pistons and you are flirting with the Devil.

 

high horse power is not the answer in the cobalt

traction mods are your friend!

 

Traction and COOLING mods will help you just as much, if not more than Big Power mods.

 

then name a couple tough guy :P

 

your safest bet is (IMO)

-stage 2 belt
-plugs
2.8/2.9 pulley
-42 lb injectors
-tune
-full exhaust
-intake

you can see around 260whp 230ish wtq

the real trick is in the traction with the car

-trans mounts
-engine mount
-stage 2 axles
-Drag radials
-short throw shifter
-Driver mod

you will be happy :-)

EDIT* forgot cooling!

-heat exchanger
-dual pass
:-)

 

Get trany mounts and a cobra heat exchanger. Dont buy the hype on the motor mount and the ingalls.

 

hahaha nothing that i have!!! I''ll get around to them some day.

 

well we already have Methanol Inj. for cooling. thinking about also doing a Heat Exchanger. what do you guys think?? we want to get the full potential out of the car WITHOUT having to do motor work yet

 

He speaks the truth... or you can just sell the Cobalt... and buy a Nice Used Evo

 

Dont run a 2.8 and 60# injectors. You IDC is going to be around 110-118%. Get a 2.7, 60# injectors and have someone GOOD tune your car. Many of these cars fail because people cannot tune.

Always get cooling mods. When your spinning the blower with a 2.8 or 2.7 your pushing real hot air into the intake manifold. The cobra heat exchanger can be bought for 50-75 dollars on the cobra forums.

But trust me its all in the tune. Your best bet is to get two tunes honestly. One for winter and one for summer. This is a little dramatic but if you want your car not to have alot of problems then this is your safest bet. It seems like every winter there are numerious "I blew my motor" threads.

 

soon we will also have a Wide band, an Aeroforce Scan Gauge, and an APEXi SAFC II for self tuning

 

[QUOTE=Element2.4;1483871]Dont run a 2.8 and 60# injectors. You IDC is going to be around 110-118%. Get a 2.7, 60# injectors and have someone GOOD tune your car. Many of these cars fail because people cannot tune.


pends who you talk to.. some ppl will fight to the death that 2.8 and 60's is ok to go some will agree 42 and a 2.8 is fine some will argue both suck some will say its safe some will say its not...try it, like it? keep it..don't like it always can go back to a smaller pulley

 

I ran both setups on my car for a while. When I was using HpTuners it showed that my IDC's were around 118% at 7k rpm's. It seems like alot of people do not have HpTuners configured correctly so they only see 60-80% IDC because it comes from HpTuners not configured correctly. I wanted to be 100% safe so I went with the 60 pounders. Its only 200 bucks so I thought it was better to be safe then sorry down the road.

 

Guys I am sorry to say the dual pass and HE's are a waste of money.... Methanol is the way to go.... dyno proven I was running the same IAT2s were the same as a full GM stage 3 option b car!

And once again, IDC's aren't the important factor to look at it is how long they are open... 20 milisecs is static... I was at 17.7 mili and at 103%

Close but still okay!

Oh, yeah and I didn't have any cooling mods!

 

Oh methanol is far superior to the dual pass and the heat exchanger. The heat exchanger did help lower the intake temps quickly. Nothing will beat the Meth though unless its some nitrous

 

Yeah, well I was more or less referring to the dual pass, the BIG HE will help gets more air, duh! But for the buck Methanol is KING DINGALING!

 

ok so.. with:

Methanol Inj.
AEM cai
ported intake manifold/blower
wide band, scan gauge, SAFC

what else would i need for a 2.7 pulley? other than 60# injectors.

 

see with the 42's and GMs rich S2 tune the 2.8 leans it out

(thats what my impression of it is)