So I've been tossing around a lot of ideas lately for what I want to do to my car. Everything from twincharging it, to just leaving it alone. Now I'm not sure how feasible this is, but I don't see any reason it wouldn't work once all the right supporting mods are in place and the tuning is done properly, but what do you guys think the potential of the 2.3L stroker engine ZZP is working on matched with the TVS? I'm not a tuning guru by any means and it'd be fairly costly, but I think it's a really cool idea that's got some serious potential if everything worked properly with it.
Or maybe I'm just nuts.

Thoughts?

Power estimates?



Here's the link to ZZP's page for anyone who hasn't heard about the 2.3 stroker...
http://www.zzperformance.com/cobalt_...new1.php?id=53

 

do it!!!!!
itd probly be up there with the fastest tvs cars, i mean they made 360 or so on the m62 right?
so a tvs would probly be able to clear 400 no problem on that motor with the right supporting mods

 

A TVS has limits due to octane required to push high boost through a 2 liter. With a larger engine you could run a smaller pulley, keep the boost the same and gain HP. With the same mods, you could expect about 50 more HP with our engine or a 2 liter.

 

So are you saying (est) 410whp with the TVS and stroker? Or am I just interpreting your post wrong?

 

i'd be more interested in a a turbo 2.3 but maybe thats just me...

 

depends on compression and fuel. Normally a TVS does about 280WHP and with our engine I would guess 330WHP. Additional mods or octane pushes those numbers a lot higher. I'm just guessing.

 

throw on a ported head plz!

 

that is a hell of a lot of money to invest in a mid 300hp cobalt...would be much cheaper to go turbo

 

agreed but not nearly as BADASS! lol

 

itd be cheaper to go v8.... see how helpfull that statement was.

it would be a great setup, stock pulley tvs with that motor would be 330whp, damn imagine a drop in pulley i gained 40hp going to a 2.8... youd gain more with that setup... damn that would be a hell of a ride

 

Hell yea!!! It's not very smart money-wise but it'd be sick as hell. That's why I came up with it. Maybe ZZP can hook me up haha

 

I think 330 is conservative with a TVS, I hit 298whp with massive spark blowout above 5500 and a unfinished tune. Keep in mind this is without the benefit of added displacement, ported head, upped compression, or upped rev ability. I think 350-400 is a more realistic expectation with a motor built.

 

It all depends on what pulley you want to run, some people are to scared to pulley down and rev higher which is where the tvs really shines.

 

I'm running 75MM to 7400rpm right now, thats pretty aggressive for a stock motor

 

i dropped pulley but now am looking to rev out a bit. although i wouldnt mind dropping pulley again and getting a lot more torque

 

freakta and I are going to try something that will require tim and zooomers help!

First off please tell me the price of your b.s. delete kit!!!!!!

secondly I talked to HPT tech and they can send our tunner a patch algorithom to push the rpms past 8200.

My plan is to build his head to take anything we trow at it i.e. 12000rpms, I now the valve seats will wear a little quicker but freakta drives like a grandpa! I'll use bates solid lifters and a set of 2.2 8mm oversized valves (lighter) and ZZP's spring kit, then I'll port the head even more focusing on the bowl output!!!! and blending it and no **** beakering each port to ensure exact CC's across the board. I want to lower the compression just a tad with a cometic gasket.

As far as the block goes I want to keep it as stock as possible, with the exception of the b.s.

with this build we should be able to slowly increase rpm's keeping an eye on everything untill we reach 12000 rpms and hopefully only 25psi

he has the fuel system to keep up.

tim, zooomer any thoughts? I want to keep stock cams just adjust the timming on them to move the power band further up the rpms.

Please let me know what you think???

 

There are certain physics involved with engine size, stroke, weight of metal, etc. that make it impossible to create a 12k rpm engine out of the ecotec. Not for less than ~200 grand anyway.

 

Well I'll figure it out I think it can be done I know the pistons and rings need to be replaced with the ones I used in my gtp federal mugol claims the short hight of the piston hats and the superlight pistons are made for high rpms. I't's a matter of piston ring clearence and alot more but it should be able to be done.

I'll try it and let you know I'm using freakta's car and I'll do everything to the T! I will also keep ZZP updated just so they can try it with there 2.3 crazy stroker!!

By the wat the GTP is fen awsome!! You customer support was awsome now it's impossible to call you guys???? I need you guys on the phone sometimes when I'm stock with lifter preload which by the wat took the shims you sent plus another one. I think the machine shop milled the heads more then a thosandth!!!!!

You should here this beast idle OMG!

 

YOu seem interested in advancing the platform. Please use your resources and time into something that has a possibility. There are probably 50 reasons why 12,000 rpm isn't feasable let me present you with a few.

1. ignition system. You'll never get spark that high
2. blower rpm, if you have it supercharged, the blower wouldn't work well up there.
3. valve float. You cannot get heavy enough springs to not have valve float at 12k rpm. If you did, they would break the valves and sink them into the seats.
4. intake runner tuning. The car would be out of tuning and air wouldn't flow well
5. pumping losses. these would be too great on a 2 liter motor at 12k
6. head flow. The idea of spinning more rpm is getting more air in and out of the engine. The heads won't flow enough to feed the engine at 12k.
A Hayabusa is limited to 11k rpm and is 1.3 liters with heads that flow similar to the LSJ. http://www.competitioncnc.com/pdf/hayabusa_stage_1.pdf
There is no point in spinning a motor faster than what the heads will feed it.

I could go on and on and haven't even touched on the crank, rod, piston angle parts. It's not a good idea to even investigate..

 

refer to post 119
https://www.cobaltss.net/forums/show...=189149&page=3

also, suggesting that ZZP try and rev their stroker motor to 12kRPMs?
not to be a dick...but...do you know anything about high RPM engines? You're looking at like a $30k bill in mods to try and rev that high.

 

you want rpm. build a honda.

 

****, just buy a used Formula 1 motor and drop into your Cobalt!!

 

ok, got me there!

the shop cars spin to 10,500-11k. built b-series honda's with off the shelf parts
::shrugs::

spinning an engine to 12-13k is all fine and dandy. why? no idea. no point. you want that level of rpm. go build a rotary engine.

 

So realistically, what do you think is a semi-good guess for power with the following....

2.3L Stroker w/ TVS on a 2.9" pulley.
Full 3" exhuast, upgraded clutch/flywheel, engine/tranny/rotated mounts, valve springs
3" intake, 60lb (or maybe 79lb injectors), h/e, meth, dual pass with option b

...that's all I can think of right now 'cause I just got out of being in a car for 10 hours and my brain is shot haha

 

So then what should we be looking at? maby 9000 rpms? I can shim springs to get more seat pressure. I think I'm just trying my damndist to get freakta's car to break 400whp with a supercharger! I like the feel of the TVS. I've been in a turbo car and it feels like every other turbo car, fun for like 3000 rpms.

I need as many rpms as I can get. I will restructor his head intake runners to accomadate this airflow. The most work I spend on the LSJ is in the exhaust side! I'm going to try my hardest to squeeze every last bit out of this head! I just wanted to try something diffrent. But your right there is no valve spring yet that can handle these RPM'S!


I would recommend if your ganna use 60's to direct inject methonol! You will be able to better tune you engine with 60's.

With the 2.3 strocker I would assume 280-310 with your setup on pump gas...

Due head work, and at the minimum adjustable cam gears or get Zooomers cams his power band on the dyno sheet looked rediculous!