Ok guys i finally dyno tuned my car and the numbers were 250 hp and 254 tq these numbers were of course corrected im in Colorado which is 5280ft above sea level. Well I have a question and I hope someone out there can help. our cars are said to handle 300 hp so with that said how much more can I push my car? Im I going of the corrected numbers or the other numbers cause it said I got 191hp and 195 tq. I hope you guys understand me im hell of tired but I just wanna know do I have more room as in 50hp or 110 hp to work with. Cause we are gonna put a meth kit and drop it to a 2.7 pulley so let me know what you guys think.

Oh and this was on a mustang dyno

 

sounds about right... you're trying to fill a 20% bigger motor with a baby blower and at huge altitude... If i had a 2.4 with a M62 i'd start with a 2.7 and probably end up with a 2.5 or something on it... you're just the victim of "big" cubes and huge altitude.. i know my SS/TC turns the boost up like 4.5lbs going from 790ft to 6300ft when i drive thru the mountains regularly...

 

See thats what I had in mind but I didnt know if my logic made sense haha. right now im at 7Psi with a 2.9 pulley and we are gonna experiment with the car we are gonna do 2.8 then 2.7 then just keep a close eye on it I just didnt understand.... if I had alot of room to work with.

 

I am in the same situation. I just dynoed my m62/2.4l and put down 257whp/233tq. I am not sure what I want to upgrade in this engine though. I am considering just pushing it to see what happens since there are numerous people that have gone well beyond 300whp. I am running a 3.1"(9psi) and am considering the same drop as you to about a 2.7". I am getting the ZZP 2.5" exhaust since I am still on the stock cat back tubing with a magnaflow muffler. I have a 2.9" pulley to throw on too. I am hoping the exhaust will relieve a bit of back pressure, lowering the boost for the pulley-down. When I get my exhaust I am heading back to the dyno. I am hoping the exhuast/pulley-down combo will yield another 30whp.

 

hhrfreak are you auto? thatll kill some of your wheel hp. also what other exhaust mods do you have? LTH would work really well in your case i believe

 

I am 5spd. These are my mods:

https://www.cobaltss.net/forums/dyno...4l-hhr-265971/

Why would a 2.9" and exhaust kill hp? I would think that would bring the hp up. Either the head or catback is causing a restriction for me. I am starting with the catback since it is quick. Porting the head in January.

What is LTH?

 

haha noo an auto would kill hp, but its good you have the f23. a 2.9 coupled with exhaust will help a good amount. Ported head will help alot though, I would say you could even drop to a 2.7

 

Ha gotcha.

2.7" is going on after the head port...along with e85...

 

Mannys car is an auto and he put down good numbers. I think its all about the tune.

 

idk 250 corrected seems pretty low for a 2.9 with full bolt-ons

 

well i am auto so im losing a lil there but some of the guys here in colorado have around the same mods and are LSJ and i rated a lil higher then them. so idk also my tq is a lil higher then the rest here

 

yeah the compression and extra displacement will help you there, but that tranny is definitely taking a good amount of power out. Think of getting a stall for it? that would help or any kind of build would free up some whp. but i definitely think E85 would give big gains if you have access to it. besides that if your looking for over 300 wheel i would say sell it all and go turbo.

 

Go 3 inch since you are FI.

 

Eh. Too late I ordered the ZZP 2.5" catback. I think it'll be big enough...I know it'll be loud enough.

 

I think 300+whp is doable with an m62. Actually I think the 2.4l will go well beyond that with an m62. I am going to see if I can hit it soon. I will see where I end up when I throw on my 2.9 and exhaust. Though, a turbo would make 300whp pretty quick work, not arguing that.

 

With e85 And a good tune you should be right at the 300+ mark I gained almost 70whp just from e85 And 1 psi more boost

 

Are you on the stock fuel pump with the 80s and e85? Also any other fuel upgrades in your setup? I likely have to run 80s as well.

 

Stock fuel system just 80's

 

I am up and running on e85 now. Did you happen to test different AFRs on the dyno. I am running .70 right now which is supposed to be about "rich power". What are you running for an AFR and how much timing are you getting?

 

Didn't convert mine to lambda but I think it's high 12's low 13's I'm running 21.5* of timing might be able to get more just didn't have time to mess with the tune

 

When I get cams and have zzp redo my tune in the spring this thing is gonna be a monster haha 430whp ? Stock motor ......... Yup

 

Ok i am at 10.5 so ill lean it out and see how it reacts to timing

 

howd it go ? my car loves timing so hopefully u can get urs all figure out

 

Pretty good I logged until the laptop was low. I ended up leaning it out from .70(10.5) to .78(11.5) and added timing. I will lean it out a bit more to about .82 and add more timing. I ended up with about 18* at 7k rpms. Its making a difference that I can feel. Was having crazy idle issues and got that sorted out for the most part.