Been there done that. Had two blown cars previous to the vette. While the SC cars were fun, they got to be a hinderance to having fun. Small problems with big boosted cars (plus 12psi) turn into big problems VERY quickly. I got greedy when I hung the SC on my first car. Started with 400RWHP and then it just went downhill from there. ALWAYS wanted more. Kept adding boost, which meant more money for fuel systems, drivelines, etc. Then parts started breaking. Then more power. It was a never ending snowball effect. I ended up not having fun anymore, and that was the only reason I started, to have fun. I ditched the SC route and now am going with a stroker. LS2 bored and stroked to 407CI. With all of the supporting goodies (cam, exhaust, heads, etc.). The car lives 99.9% of its life on the street so I wanted incredible stop light - to - stop light performance. I could care less about 1/4 mile performance. The car will be FUN on the street, where I want it to be fun. I probably wouldnt get the neck snapping acceleration from idle with a blower, but I will get it from the stroker motor.

Bottom line be absolutely true to your self. If you want big peak numbers for bragging rights, then SC. If you want street performance around town, I say stroker. If you want 1/4 mile performance, then either stroker or SC take your pick.

Neiether will be cheap when it is all said and done. Pick one that best suits your requirements and HAVE FUN!!!!!

 

This is a good point, and I now see that my last post may have made me look stupid. I said "crank up the boost" but what I meant was just to "add" boost. Throwing 7lbs on a stroker is going to give you a bigger bump than 7lbs on the stock motor. So, to clarify my "vote" I think you should build the stroker (and yes you should definitely do something about the heads and cam, or it's kind of pointless) making a stronger, more powerful N/A foundation to start with. Then, if you decide to throw a blower on, not only will you create more power than you would on the stock motor, it will be able to handle it better.

On that note, however, my experience with forced induction has been a roller coaster ride... Constant changing of boost levels requiring more or less fuel and non-stop tuning. Just a pain in the a$$. That and, you run the risk of possible catastrophies like a vacuum line falling off your blower, leaning your car out and burning up pistons (just a random example, but you get my point).

PS - Yes, if you're going to build a stroker, go for the 402, not a 383. As someone mentioned earlier in this thread, there is no replacement for displacement.

 

I vote for boost. 8-10psi with a safe tune and you'll be happy...at least until you want more power . Boost is addicting. A supercharger even on a stock 346 will give you more power then any radical H/C stroker setup and will drive like stock until you lay into it. Don't get me wrong, a stroker (402ci+) is alot of fun for sure, but you will be limited on the power you can make N/A. Now a blown/stroker setup would be icing on the cake!

You have to ask yourself what you want out of the car and your budget realistically. Always expect to pay more then what you initially planned. Don't forget about supporting mods and drivetrain upgrades etc...

 

I work in the software industry... so computer tuning is something I pay attention to in detail.

I prefer aggressive ignition timing (all you can get without knock) being that a crisp motor is better than a soggy one. As a rule of thumb, you gain 10 rwhp for every degree of timing you can safely run.

On my last twin turbo motor I gained 60 rwhp in a few spots because of timing alone! Big difference in feel on the street. Much more responsive too.

Running 7-8 psi at a certain timing figure is far different in personality than an identical engine running 10 psi with it's ***** cut off as far as timing goes.

I prefer a sharp 7-8 psi engine.

Good luck with your stroker or boosted engine.... there's a lot to read before you make your choice. Measure twice, cut once.

 

i would say sc. i have 507whp on a safe tune stock everything xcept for pump and injectors to back the boost. u dont have to buy a new sc kit u could have a sc with 500+ at the wheels for less then 4k done if u went used.then u would have money left over for whatever. i just waited for a smokin deal on a used kit and got it im very happy with it and i didnt spend that much. jmho

 

What? A radical stroker can make pretty good power, see sig.

I totally agree with the second paragraph. Every setup has it's pros and cons. Your end goal should determine the path you take.

 

Nice numbers. What compression ratio are you at?

 

MPM IV,

Sick #'s for sure! Don't get me wrong, I'm not knocking a stroker motor at all. Just sayin' depending on what the OP's goals are and how he wishes to reach them...a blower might get him there with room to grow in the future. Or he just might be happy with a N/A monster such as yourself! Different "strokes" for different folks

 

The more power you get the more you want, it never ends until the money ends.

I went from a C4 to a supercharged C5 this last year. The difference was night and day, but now it seems like the power is lacking. You get use to it and want more.

Just to have 1000hp to say you have a 1000hp is different from having 500hp and using all of it.

Choose what you want to do with the Car as the others have said, then make a decision. Either way it will be fun.

 

 

Without looking at the build sheet I'm pretty sure it's 11.2:1. I'm limited to 91 octane here.

Thanks. I think we could all provide better info if we knew the OP's goals. I realy like blowers, and if he wants over 600, or lived at high elevation FI would be the awnser. I just bought a direct port nitrous kit for the occasion that I'd like a little more.

Almost forgot- I looked at OP's profile and he has 4.10's. Thats going to create taction problems with big power. I believe someone said measure twice cut once.

 

i have been in MPM's car and its nothign short of sick. too bad he never took me up on my offer to borrow my drag back. LOL. i heard threw the grape vine a 200 shot is going on it!!!!

 

When all else Fails ask Google...

http://www.google.com/products?q=LSX...=on&scoring=pd

 

Boost!!! The stroker will make next to nothing without better heads/cam. A little more power and a good amount of TQ, not enough to justify the price tag. The $5700 budget definitly doesn't include an upgraded top end. Run low boost now and when you feel the need for more power you can forge the bottom end and go as nuts as you want.

 

ok, I am going to go with the supercharger

 

Now that you have made a decision, consult with the experts

 

Way to go Tom!!! Marc L.

 

I built 2 different stroker motors for my 72 Camaro. The first was a stroker forged short block with a mild cam and some 993 GM heads. It ran good but needed much more. The second motor was another stroker short block with a hotter cam and aftermarket heads and wow-o-wow its hot as hell. I would love to have a supercharger on my Z06, but a stroker with heads is a good option for some guys.