Can anybody tell me if they increased power on your car and if so by how much?
Me - k&n intake, Hahn dp, zfr54 turbo, upgraded fmc and piping, zzp tune. I run premium fuel.
running track days in FL on palm beach international and Sebring. Looking for more power without turning up boost.
zzp has it turned down for track days so I keep it there.
I have plenty of power most places but the 500+hp guys kick my butt on the main straights. So more power without more boost.
like the cams but wanted to get group feedback first.
thanks.
Oldtimer

 

What are you running for boost pressure? Do you have access to e85?

s2 cams will make some nice gains 30-40hp If your pushing your setup. It doesn’t sound like you are though. Probably more along the lines of 10-15hp. Pluses would be gaining a bit more top end on your power band and A higher redline potential. If your fuel system is at its limit the bigger fuel lobe will gain some headroom. If not the gains to $ ratio aren’t really that good. you would also want to get your head ported to fully take advantage. Adding $$.

if you have access to e85 getting tuned for that would be a great bang for the buck. Alternatively getting meth injection and tuning for it would also be good. Especially considering the hot humid weather in Florida.

I have almost identical mods to you power wise. I’m currently limited by fuel quality. E85 or meth injection would need to be done before I would even consider going the cam route.

 

Thanks Slap, I will check into head operating. I know boost is not as aggressive due to track days we’re on it longer than a street race. I think if I could get 400 and not get too hot that would do it.
Only place I notice issues with big v8s is straight sections. We simply cannot hang with c7 and new modified stangs and Other big power cars on long straights.

 

Being able to increase your redline to 7k will make a large difference, add the largee fuel cam to fun an e47 or e30 blend that will help with power and temps.

They definitely help the engine breathe better in the midrange to redline

 

If you look into getting a ported head, reach out to Josh at Category V Port Worx on Facebook or Instagram. He's been porting Ecotec heads for over a decade. Well respected and trusted with very reasonable pricing on port work. Based out of Dayton, Ohio.

 

you should be able to get to 400whp no problem. If temp is your worry run water meth injection and get two birds stoned at the same time.

 

Thanks guys. I don’t want to run anything other than 91-93 octane, no blends of any type. My thoughts with head and cams was to increase power without having to increase boost. More boost more heat, more boost more potential problems.
Being de tuned for the track, I think if I had 400 at wheel for track days that would be enough without having to worry about overwhelming the tires.
Zzp said I could have a switch that would toggle between lower power for track days, switch for increased power for the street.
I just want more dammit.
best
allan

 

If your just worried about getting pulled on in the straits assuming your still in third? You could leave it a bit more agressive top half of 3rd/4th rpm for your circuit track tune. But really smooth ramping make it easier to deal
with

 

Honestly, I think a bigger turbo would be a better idea and a lot less work. Might even be cheaper in the end considering someone would buy your old turbo. Cams and head work do not come cheap.

 

Bigger turbo wouldn’t be beneficial for for most road courses. Your giving up too much for strait line speed. IMO

 

Choose the right turbo and you get quicker spool and better top end power. Lots of really good turbo options these day.

Example - The new Garrett G series turbos. The Evo guys are seeing nearly stock turbo spool speed and double the HP as a stock turbo.

 

Efr fits the same bill but he’s still not going to keep up with 500hp cars on the straits without turning up the boost.

haven’t looked into those. Sounds like allot of cost changing over parts to make it work though.

never thought to ask the op. What are you running for boost now?

 

Bingo. A GTX2871R is a 560hp-rated turbo and will spool very quickly.

 

Wow, people still helping out that’s great.
I like what slap said about being more aggressive in 3rd and 4th, that is just where I need it and I had no idea you could tune that specific. I also like a better turbo that just works better. As slap said larger is not good due to lag, but more power, same spool time, boost in safe levels, I like it.
will look into options. Will look into gtx.
thanks guys!
allan

Forgot boost question, I think ZZP has it around 24-26.