I dont know how many of you guys have upgraded flywheel's but when i did to my cavy it felt like a infinite dos of nos. so u thingk the flywheel is already light weight???? because if not thats more HP to the wheels!!!!! Good bye SRT-4

i dont care anymore im voiding the warrenty i got money to fix the engine lol

lets etimate smallest amount of hp for each mod

Header 5hp
intake 5hp
Full cat back exhaust 5hp
High flow cat 5hp
header 5hp
ECU 10hp
Intercooler 5hp
50 Zex kit 50hp
--------------------------------------------
= gazillion HP j/k 90HP
+205hp
---------------------------------------------
295hp At crank
so round 270ish at wheels when applying nos hellp EVO's

if not just add 40 hp on regular mods and your pushing 245 hp thats impressive cant wait sorry for all this just i am getting more and more hyper every day!

This isnt including a pulley and flywheel even more POWER!

 

If SCdyne's header adds 30hp to the wheels itself (as suggested by his results), that will be all it will take to hit SRT-4 levels.

 

is he for real someone needs to get that header on a cobalt/red line and get it to a DYNO
asap!!!!!!! 30 hp sounds outrageous unless GM restricted the gonads out of it

 

yup scdyne gets 38 whp wasnt it, which is nice, aem intake provides 7whp, exhaust probably around 10whp, gm stage 1 ecu says 230 -240 flywheel hp but since the car is underrated allready and is producing 210whp stock then most likely the 230-240 hp is at the wheels. so say u get the gm stage 1 package which should be enough to hang w/ srt 4 so u have:

230 whp stage 1 upgrade
+ 30 whp for header (plus or minus)
+ 7 whp AEM intake
+ 10 whp for catback

= 277 whp total

which is nice and thats if everything produces according, we all know mods affect one another so with those mods u could expect around that type of whp. which should be enough to put the boat in the mid 13's. especially w/ lsd.

and thats just basic stuff imagin P&P head, aggressive cams, ignition system, porting out the supercharger (gtp owners do that and produces good numbers), upgrade fuel system. hell swapping out the supercharger kit for a complete turbo kit.

 

all those claims are highly exagerated and hopeful at best. I wouldn't trust manufacturer's claims.

on a small displacement engine, a FULL exhaust(header, cat, piping, muffler) will usually yeild 15 to 20 horsepower at best; on the 2.0s/c expect more than that, unless GM did an excellent design job.

Never, NEVER believe an intake maker's claim that their intake makes more power than the next guy's; it's a metal tube with a cone filter on the end, that's all.

but the biggest thing of all, is you can never say a certain part will give X hp; every engine will take it differently, and every combination of mods will act differently.

Look at it this way - say, for example, you add a header and get 4hp from it. Or, you could add an intake and get 3 or 4. but if you add both at the same time, they'll help each other, the combined boost might be 10 or so.

I'm using numbers typical for the 2.2 eco or 2.4 twin cam; on the s/c it would quite possibly be higher.

and the only way that header gives 30 hp, is if the stock exhaust is good but the header is terrible, in which case all headers will give comparable numbers. In other words, if that header gives 30 hp, all others should give 20-35.

 

I agree with you a 100% thanx bigred lets just hope this exhaust system sucks so we can get huge number's!!!!!!

 

I'll disagree with that, have you seen AEM's new V2? Its more than a metal tube lol, well not much but it is different than the other metal tubes haha.

 

Apparently this header was dyno-tested before an SRT-4 and embarrassed the SRT-4. The guy looks to be guarenteeing a 15% power increase, which is 30.75 hp (from 205 whp) bringing total whp to 235.75. Pretty good, and that could beat an SRT-4's dyno numbers.

I have heard comments that the 2.0 S/C is "choked down" (from one of the Lordstown guys I think) and that the exhaust is very restrictive. If that's true, a header is a no brainer mod. I'll take 30 more hp for $400!!!

 

I would ^ too if i was gonna get 30 hp well see thanks for the info guys!!!! so far my cavalier sucessor is seeming to me to be a great GM car!!!!!

 

on a car that has forced induction all gains are better. on a regular small displacement car ie. my 2.4L a catback will not gain 15-20hp your lucky if its 10, an intake lucky if its 5 same w/ a header. stock i dynoed 127 whp tq was around 134 at the wheels. my car produces 150 hp and 155 tq stock. w/ intake, 2.25" exhaust, header, cat, motor mounts i dynoed at 140 139hp to be exact and 143 tq. so thats around an 11-12 actual whp gain. so therefore the catback did not give me a 15-20 flywheel hp gain more like 10, theortically i gained about 20 hp from all mods considering a 15% drive train loss. and only thing that was dyno proven was the aem intake, which like u stated above all other mods affect other mods in gains, my powerband was actually good i gained a nice amount around 4-5 hp throught the intire rpm band peaking at 11 which was nice same w/ tq.

 

I said in my post that the 2.0 will gain more with mods simply because it is forced induction; all I was poking at was that manufacturer's claims are to be taken with a grain of salt.

by the way, what eleveation/ temperature was it when you did your dyno run(I assume from your 15% loss estimate it is a 5sdp)? it seems most 2.4's(around here anyway) usually hit the low to mid 130's stock.... but then again, it's pretty much zero elevation here, and the temp isn't much higher

according to the gtech, my car is putting out 139, but I don't believe that(not for hp anyway)

 

I said 15 - 20 with cat back, cat, header; that is a absolute best-case scenario, not specific to the 2.4. From what most say on JBO, a FULL exhaust(from the block right to the back of the car), intake, and throttle body seem to add around 20-25 on average for the 2.4.

of course, you could get an oddity like the older RX7 turbo's which gained 50hp from an exhaust....

 

dont know what the elevation was where i dynoed bay area so it's somewhat low. imo. i dont think they did correction factors when dynoing, they said my output of tq was really high compared to honda's. and that si's w/ the same mods dyno higher than me by like 20 hp. so i dont think they did n e correction factor's they just put me on the dyno hooked the sensor's up and gave it a go. i'm sure i'd be in the mid 140s but eh i got a baseline, we'll see what my cams, t/b, pullies, clutch, flywheel, gears, lsd do oh and fpr.

 

if you want to add a dual exhaust system to the SS s/c, does gm have a bumper that allows two exhausts

 

Wrong forum guys

 

I visited their site but didn't see a specific reference to a SS/SC header. I see a product for the Saturn Ion Redline, where they claim a 10% increase in power "guaranteed".

Could someone post a link for me?