how much power should i expect from headers on the vortech kit?? is it worth the money or should i get something else with it??

current mods: 2006 g35 6mt rev pu
vortech with 3.12 pulley
HKS exhaust
plenum spacer
600cc injectors
walboro fuel pump
UTEC

i had test pipes before but wasnt sure if that gained power or not.. i think i lost power down low, but up top i noticed some gains.. i cracked my test pipes so i just put my stock cats back on. whats the best mod to gain more power on my vortech setup?? thanksss

 

i say with headers and tp you get a max of any were between 360 to 370ish max. Have you thought about changing out the pully?

 

headers are worth it. there have been a few folks on here who've made much more power over stock with aftermarket headers. i've personally seen a guy with pretty much stock everything except for headers make near 380whp (dynojet) with a 3.33 pulley. IIRC, there was a thread in here 2 or 3 days ago with a guy making just over 400whp on the 3.12 pulley, aftermarket headers, and test pipes.

tomei headers will definitely be part of my next round of engine mods.

 

but you also got to remember that not everyones gain or peak hp with mods are going to be the same across the united states. There a lot of factors that go into getting the numbers. I would honestly say 380hp would be the Max like Max he could get with a full exhaust before pulleys.

 

Forced Induction cars will have greater gains in power with intake and exhaust mods Vs NA cars. If your using shorty headers you will not see much more gain in power with a cat back exhaust. If you go with a cat back exhaust than its a waste of time with shorty headers.

If your deciding on long tube headers than a cat back exhaust will also benefit you.

Like hellsoldier mentioned your power gains will vary with exhaust systems. Likely power gain would be around 15-20 RWHP.

 

I am running stillen headers, 2.5" APS TP's and 2.5" true dual exhaust with a X pipe installed. I feel i would not have made my rwhp numbers on a rev-up with out headers and a free flowing exhaust setup. I put my cat's back on once a year for my emissions testing and notice i gain a slight amount of torque back below 3k rpm but lose quite a bit of power up top per the butt dyno. Headers on a N/A setup though i find to be negligible in HP gain on the VQ.

 

Agreed, I had DC headers on my 03 with the Vortech 3.12 and made 360 rwhp. I noticed that the power gains were made above 3k as well.

 

I had stock manifolds and made 460/405. I personally wouldnt waste the time or the money to do headers.

 

test pipe 3.13 pully no headers, 415whp

 

money aside, do you think you would have made more power & torque with headers? serious question since i'm planning to swap mine out (along with exhaust & reinstall 2.87 pulley) later this year.

 

Is it just me or is everyone missing the fact that every dynojet or dyno will have different numbers??? Some people have it set to high numbers outcome and some people have true heart break dynos like sheriff. For example GT-R dude just finally got into the 400's with headers and other suppoting mods. I bet if you would take him to another dyno around the united states his numbers would be way higher. Also, his rims didnt help but that not the point.

 

ya mine was done on Sharif's "heartbreaker" But it has never left me heartbroken on either of my builds LOL!

No i would have never swapped out to a header with my vortech on a stock block. I've never seen any dynos to prove its better. There is plenty potential in the blower itself to make a great curve and rod bending power on stock manifolds.

 

Well, i cant speak for every car.... Maybe your car a freak ;/

 

3.12 on the REVUP not like most of the cars with their numbers listed...put down 369 DJ and 408 DP.

Now that I have upgraded to the TTRIM blower I put down 410RWHP and 327TQ with belt slippage. lol

The 3.12 on a non rev makes more boost than the rev.

I also have headers and if you are a top end freak do it. If you need more light to light keep it stock, but for the money and purchase price of headers/installed you can upgrade to the TTrim blower.

Your call!

NOTE: you need a new Air Filter the TTRIM has 3.75in opening not 3.5 like the other blowers.

 

I was slightly disappointed in my numbers, for the price of headers/install.

 

if you are still running a 3.12 pulley it's not worth it.

Truthfully, headers were the worst thing i've ever done on this car and i tore the engine down for a build. It took me longer to put headers on with the engine in than it took to pull the engine, swap headers, and put the engine back in.

Lots easier ways ofr you to get more power. simpliest is go to that 2.87 pulley.

 

if i still had a vortech on stock block i would go 2.87 and meth and call it a day.

 

Money would be better spent on 2.87 pulley and a nice set of test pipes.

 

this is my dilemma. i ran the 2.87 pulley for a few months and loved every minute of it. however, when i switched over to Osiris, my tuner was concerned that the car was making too much boost (13 psi). from 10psi on, the increased cylinder pressure would cause sporadic pinging - he could only hear it with the scope. i put the 3.12 pulley back on because i'd rather have my stock block last through next fall than have the extra 20-30 ponies. the reason why i want to install headers, and I'm guessing i'm not alone in this, is for the potential to increase power (get back what i lost going from 2.87 to 3.12) without increasing boost pressure. alternatively, if i can reduce backpressure enough with headers & a better flowing exhaust, i could put the 2.87 pulley back on.

summary: i completely agree that the 2.87 pulley is the best bang for the buck, but what are the other options if you want to increase power without increasing boost? headers, test pipes (can't get away with these in SF ), cams, etc seem like the way to go.

 

It appears that you are suffering from a detination problem more so than anything else it seems. Do you have a water/meth system installed? If not you may want to use the funds you set aside for the headers to purchase a quality water/meth system. I am running 14 psi of boost at 7100 rpm but i also use 100 octane fuel exclusivly. I am currently in the process of installing a water/meth system on my Z for added saftey during the hot vegas summers.