dude...mustang always shows lower than dynojet. that is a fact. i don't see what your point is?

 

the GMPP header will that give you the same gaines as a aftermarket one i would like to get 200whp out of my car also and i no it can do it. with a few bolt ons

 

You'd need some serious cyl head work to get close to that high--maybe a jump in compression too.

 

You don't think it will make it with those mods? BTW where did you get that 2.4 badge, I've been looking for one of those and a N/A or Naturally Aspirated badge too.

 

No. Were talking about taking a car that dynos-150-160 @ the wheels and adding 70hp!

Two main ingrediants for adding lots of hp to a NA engine is the cam(s) and cyl head. You need that head to flow excellent and the engine to rev alot higher.

Sure a header and exhaust helps but not as much as these tow mods.

The 2.4 badge is off an ION 2.4--sry don't have a part number for you--just go the parts dept at a Saturn dealer.

 

Thats actually completely incorrect, the so called "GMPP header" is not a header it is a GMPP EXHAUST MANIFOLD which it plainely states on the chevy website the difference between a header and a manifold is a manifold is a 4-2-1 configuration and a header is a
4-1 configuration ........manifolds are designed specifically to give you more low end and mid range torque

As for a header, they tend to be more mid range to high....all though theoretically you will always see better gains with a header versus a manifold because of the 4-1 configuration allowing easier air flow.

I hope this helped man.

 

to bad the gm manifold isn't a 4-2-1. Its a stock manifold thats been horned out and the ports and been cleaned up. A manifold usually refers to the stock piece and header for aftermarket. There are a few 4-2-1 header's out for the cobalt and none call them a "manifold".

 

You would be corect so I can not argue although Iam Speaking in general. As for the GMPP Manifold it is in no way a header because it is a stock part that has been honed and ported ....doesnt change the fact

Now a header like you stated is usually a term used for a performance Manifold .....
A header is built with performance in mind The GMPP MANIFOLD is a stock part that was then later honed and ported for performance gains

were on the same page were just wording it differently

 

Manifold=cast
Header=welded tubes

Anyone have an actual dyno after bolt ons and tune? George maybe? Sure takes all the guesswork out of this.

 

surprised in all this build talk, nobody mentioned "pulley"

 

lol good point

 

Seems like this crankshaft pulley might go nice with those plugs you've been talking about,get a little lowend grunt goin

 

ya exactly what iam looking for how much did the pulley run you

 

I dont have, Upuponme, whos here and the HHR forums just did the mod and he loves it, its about 45 mins of labour and the product I think is 150.00

 

hp gains ????

 

pulley maybe 5 hp

 

exactly, also the acceleration and response will improve enough to put a smile on your face

 

hmm is it hard to install ??!?!

 

My question exactly.

 

I think you guys are guestimating too much and the fact of the matter is that all this speculation means squat. There are too many variables to actually give an answer. Even if there was someone who did this and dyno'd an after number, this does not mean someone will gain that amount of power, each motor is different and each motor reacts differently even to the same modification. Yeah, you could POSSIBLY get a general idea of what you COULD gain but these things aren't certain.

The number guesses of 5 HP for this items and 10 HP with this item and put it together and you get 15 HP is misleading.

Overall, just do it and see what happends...thats the only correct answer someone can really give you.

 

Super post Adam. My sentiments exactly.

However, having done the mods (but have not dyno'd yet) all I can do is guestimate based on seat of the pants, length of burn-out, speed increase at end of interstate on-ramp, etc.

Based on these highly scientific measurements, using a double-blind placebo test (a stock 2.4l auto) for comparison my best "pull a number out the air" guestimate for my 2.4 is between 210-220 engine hp with my current bolt-on's.

I completely agree that you can't add mods and come up with a total hp figure, but that being said, let's look at the mod list and a conservative estimate of their results.

C/A header, b-pipe and Corsa catback. (C/A claims their header alone is good for 10-12 hp on a bone stock 2.4). Total so far = 15hp gain

Injen CAI. I think most will agree it's good for 5-8hp with a full exhaust. So let's say 5hp

The Wester's tune people claim 20+hp gain. I think that's a slight exageration. It does add lots of area under the curve, not to mention an aggressive tranny tune to make it "feel" like 20hp when it's not.
They added more fuel (for the e-rams), advanced the timing (for the header) and increased my rev limit so it pulls hard till it shifts at 7k. That's got to be worth at least 10hp, conservatively.

This totals 30 engine hp +171 stock = 201hp so far.

Now there's the super e-ram. Before anyone says anything negative, I've heard it all before and it's pure BS. They do work if you set them up correctly. They wouldn't have won 7 awards at this years SEMA for best new product if they were a scam, now would they? By the way, they're about to release a new 3hp, 40,000rpm version, the ultra e-ram (said to add about 35hp to your average v8 for $1,000), but that's another story.

Anyway, the company guarantees a 9%hp increase on top of your existing mods for their super e-ram model (5% for the regular e-ram).
200hp x 9%=18hp. Let's say they only added 10hp, cause maybe my first calculation was off a little, or my a/f ratio is not spot on.

This brings the total to 210 hp using ricer math - but super conservative ricer math, I might add.

(Donning Nomex suit) Ok, let the flames begin!

 

No flames here except for you're using flywheel horsepower. Also, is that e-ram even worth it? I saw that a similar engine with 2.4L VVT and the e-ram gave it about 7hp/7tq.

 

Since I've got an auto, subtract about 15% to approximate the fwhp.

7hp for a single $300 e-ram with no tuning seems about right. I didn't notice the full benefit of the e-ram until my Wester's tune.

I don't sell e-rams nor do I benefit in any way from their sales, so I think I can speak objectively. I think value is a personal decision. I know people who pay $150 for a throttlebody or a pully, only to pick up 2-3hp. Others spend $650 for a cam and another $400 for installation to net 20hp ($52.50/hp.) This is something I plan on doing in the near future. A base e-ram ($300) is guaranteed to make a 5%hp gain, so for a 171hp engine it should make 8.5hp at the crank, less at the wheels. If it's making less than this, there could be installation or tuning problems.

On our engine, the e-rams work best between the MAF and the throttlebody. However, I've found that though the MAF senses the increase in velocity and adds a little more fuel, it doesn't sense manifold pressure, so it doesn't add quite enough. Just like a cam, you've got to tune it if you want max hp gains. Another problem I had was that the stock relays supplied with the units couldn't flow enough current to supply the e-rams. Trashing them and adding a starter solenoid in their place also helped supply them the power they need to make max hp.

Another thing you have to ask yourself is how much hp you want to add. If you plan on leaving your engine n/a then e-rams are a logical choice for a few extra ponies. If you need big hp, then go F/I. Hahn's turbo kit will cost about $4k to make 100hp. $4000 turbo kit /100hp = $40/hp

A $300 e-ram/7hp = $43/hp, not too bad of a value. Another thing to consider is that the e-ram only works at wot, where a turbo or sc delivers extra power all the time, burning more fuel and putting added stress and wear on the engine all the time, even when it's not needed. Some people like this concept, while others don't.

 

any questions about the lighten crank pulley and light alt pulley pm, me not to get side tracked, but i love it, ( i have a 5spd) dont know about actual hp gains but i can notice a diff and will be dynoing as soon as i get my header in

 

I had my finger on the "add e-ram to cart" button until you said it only works at WOT. E-ram would do well for me with a GMPP Intake and getting a tune next week if it worked all the time.