I'm thinking about going out and getting an 03-05 LS Sport, and I just wondered what you guys would prefer using on your own cars for boost. Would you pick the Hahn Stage II or the GM Supercharger? I'd like to make the car a nice, summer only car, with ~250hp to the wheels.
1997 Sunfire SE
I would personally chose the Hahn Stage 2.
If you only want 250 to the wheels, (only right? heh) than I'm sure the GMPP M62 could get you there, safely and reliably.
However, people always say that once you go boost, you want more, and you'll be hard pressed to up it to more than 300 whp, which is where the turbo would be easier to go.
The reflash also locks you out of tuning, so that's also something to think about.
Personally, I'd say go with the Hahn kit, unless you're absolutely sure that 250-300 is what you want, and you don't mind not being able to tune later on.
I'd like to have 250 to the wheels, but I can't say for sure that I won't want to go bigger some day down the road. Also, I want to be able to tune the car, so I'm gonna rule out the Supercharger. I had planned on keeping my 97 and doing a 3400 swap, but I'm gonna buy a newer cav, and keep the 97 for a winter car.
How much power can I safely run on stock internals?
1997 Sunfire SE
Just say I had a Built eco in my car and I Bought the Hahn Stage II kit. What would be needed to up the boost to say 16-18psi? Is it just a matter of changing the wastegate spring and tune it over again?
1997 Sunfire SE
id say supercharger. you dont have to use the GM reflash; you can get HP Tuners and tune it yourself. you can also get a smaller pully, a big heat exchanger, port the blower..
12.33 @ 111.67 mph [Oct 2009]
Dyno'd on 08/02/09 - Mustang Dyno:
327.6 WHP 333.6 WTQ [10.1 AFR]
You would want to go external waste gate IMO if your boosting that high. My engine has fully forged internals, once its running and i have enough saved I'll be running 20psi in it daily, but I'll be using mega squirt to control the fuel. The hahn kit uses a fuel pressure riser.
Truthfully you should just give them a call. There great to talk to on the phone and can answer all your questions.
-Chris
Can I choose between an internally gated turbo or external wastegate when I order the hahn kit? I'm gonna be using HPT I think...
Also, I'd love to hear the details on that engine build, please elaborate...
1997 Sunfire SE
if you want 250, your better off going custom turbo set up.
just buy the hahn kit, they all come with an internally gated turbo, kit comes with a 16g or upgrade to a 20g..for more $$$
Built&Boosted moar
04 Cavalier Turbo r.i.p my baby
2nd place 2009 GM tuner bash qwick 8--holla
I still haven't got an answer to the question. What is invlolved with upping the boost, changing the wastegate?
1997 Sunfire SE
I have the supercharger on my ecotec. It makes 213whp. I have a full exhaust and intake plus a 62mm throttle body. the problem with making 250 to the wheels is your car would be making close to 300 at the motor and according to GM and other build guides the connecting rods will break around 250 motor hp. I don't know about the Hahn II set up.
hmmmm well really the cobalts using the m62 are achieving 250 very easily. Nobody on this site has anything crazy with the m62 setup except airtonics which im sure is making around 250whp. All you need is a pulley change, HE, tune, exhaust, intake, port the blower, throttle body, and possibly a set of cams and you should be good. Along with injectors of course.
I Want Turbo...
There is a guy on these forums running 15psi from the Hahn kit and he's on stock internals and haven't had any trouble yet. I'm not worried about getting an eco built to spec if I need to.
1997 Sunfire SE
Were actually working on an Ecotec turbo kit right now for the cavalier / sunfire platform. Should be fully available soon, right now they are on "pre-sale" which has a lower price tag than what it will be when fully released. Kits use a larger turbo than hahn, and are all externally wastegated. The turbo itself will go well over 20psi without being out of its range if ever desired to be that high.
Can you give me some more info on the Kit? Is it a complete kit? How much will it be? What does it use for tuning?
1997 Sunfire SE
Yes it is a full turbo kit, complete bolt on assembly. Price right now is $2995 for non intercooler ($750 extra for front mount intercooler). Most of the information is listed on the website. Not 100% sure on tuning, which is why we dont have a final sale price. This presale price does include whatever fuel tuning we will use, we will be trying a few different things and seeing what gives us the best results. Once we have that figured out we will release the kit at the normal price.
BOOSTED / JMdecals.com! wrote:hmmmm well really the cobalts using the m62 are achieving 250 very easily. Nobody on this site has anything crazy with the m62 setup except airtonics which im sure is making around 250whp. All you need is a pulley change, HE, tune, exhaust, intake, port the blower, throttle body, and possibly a set of cams and you should be good. Along with injectors of course.
stock boost...= better bottom end.
not to thread jack at all, but i've been debating on going with a super 20G instead of a super 60 or GT3071R. My WHP goals have been lowered due to rising fuel costs ($1.13/L for 87) so 250-300 is my new goal instead of the 400 i stated a while back. If i ever want to up the boost (cuz who doesn't crave more power?) i'll have some head room.......suggestions?
again, sorry to thread jack....reading hahn kit got me thinking of their other kits for the solstice 2.4 :p
Anyway, i've been doing a little reading on Boost builds and heres what I came up with so far. It's a very rough draft....
Patriot performance Stage II Head
Wiseco pistons (0.20 overbore, 8.9:1 CR)
Eagle Rods
MLS Headgasket
ARP Stud Kit
HP Tuners
Should I go with the eagle forged crank, or should I just leave the stock crank in there? I'm aiming for 300whp. PLease comment on the build plan, I'm a newb to eco's.
1997 Sunfire SE
stock crank will be fine for 300 whp.
When the Sunfire was in its 400whp iteration, The car had a super 20g and the only engine modifications were je pistons, eagle rods and ferrea valve springs. Everything else was stock.
Street-Legal 2003 Sunfire 10.58 @ 139 MPH
How much boost were you pushing? the super 20 G is the turbo that comes with the hahn kit correct?
1997 Sunfire SE
