Hey guys. Been planning this for about a month now and did plenty of research just want to make up my mine. Maybe you can persuade me to lean on one side. I want to either go FI and get a Vortech supercharger for my 03 or build the motor by getting rods cams bearings the whole set up.

Anyone got a good idea on what compression I can go with if I so the internals also recommended parts.

As for the vortech, any major concerns that I might end up with.

Thanks Guys with any support cuz this way I can make up my mind.

Also if u think I shouldn't go ahead and let me know i don't mind

 

Depends on your power goals. Bolt on sc kit with a stock motor will make more power than a bolt on built motor. Some nice built motors can run more than a full sc setup.

 

Either way you go will cost you many thousands of dollars FYI. I'd go SC but that's just me.

 

True dat about the $$$. But I'm sorry I love my turbos

 

I would do both... Not sure why it's an either / or question, although it's often a matter of when - but not if. Build a high power NA motor now and add a Vortech whenever you want to later on. Don't go higher than 11:1 on the compression unless you plan to run water/meth inj. or E85 (and 11 is pretty much the top of what is probably just barely ok on 93 octane, assuming vortech later on). I can't think of anything offhand that you would put into a pure beastly NA build that wouldn't also carry over to a vortech setup with the exception of the intake tube.

 

if its one of the other, id do the supercharger... you will get more power..... but you MUST get a tune or you will blow it like plenty of people do by just bolting it on and beating it..... as far as a built n/a motor, you really wont see gains from upgrading rods and pistons unless you raise the compression, which lowers torque, and stroke it..... a 4.3 stroker kit with, 11:1, oversized valves, cams, and long tube headers MIGHT come close to the same numbers as a supercharger on a stock motor.... but it will cost more most likely... internal engine work labor takes more time than bolt ons. more time= more money

 

G35MM , I am in the process of getting FI. I have been going back and forth turbo versus sc.

What I have learned is what everyone is saying here. We need to know our power goals up front. What no body does tell you though is that if you never drove a FI car, been in one to really feel the difference between N/A, and then been in several different power levels of FI cars then YOU really have no idea what numbers you really want. So I really don't like that truth ... but it is a truth.

How I got around this is deciding that I want to max out the stock block engine. Meaning I want the most torque that is safely possible which is about 425 torques. And the vortec sc is one of if not the best kit out there for this. You will get the most torques without going over the max but have more horses then you would get from a turbo. This is because the horse and torque ratio is closer with the turbo then the sc. So for me this makes my decision a little easier. Also the price is a no brainer.

Next question you have to ask yourself (and be honest), "am I a good driver?" This question comes into play because of the way the boost hits you. SC is more linear while the turbo will slap you back in your seat. That slap might be fun but going around a corner, that slap might slap you into the hospital. Now thats extreme but true. My friend is +500hp at wheel vortec and he drove my other friends car +400hp at wheel APS turbo and thought the APS felt faster then him even though he wasn't but he also thought it was a little scary ... So just be safe.

Hope this helps. I can't wait to boost and I am sure you feel the same but we have to be smart about it.

Good Luck

 

You can get by with just installing the Vortech...for a while. If my intention was to go FI I'd start with a rebuild and add the Vortech. PM BigC (Chris) he's done both and will give you the best heads up and advice. He recently went with a rebuild and turbos, to quote Chris he says it's "Scary Fast" as the turbos spool up!
Gary

 

I like most of your post.......................but turbos will always give you more horsepower and torque then a supercharger on this engine...period.

 

Yes that's true. I am not saying that or at least did not mean to say that.

I am saying that because the turbo gives more torque with the Hp and at such a close ratio, on the stock block you can get more Hp with the SC because it produces less torque the a Turbo.

You get more Hp and less torque on the SC witch is perfect for a stock block.
With the Turbo because such high torque you will have to stop the turbo output before you blow the engine. And where you have to stop it will be at a point that is less in HP then the SC.

Thats my understanding.



OHHHHH SHYTT THIS IS MY 100TH POST ... AND IT WAS ACTUALLY MEANINGFUL

 

That really depends on the build and which turbos vs. which supercharger. That's generally the truth, but there are always exceptions. The guys that play it real safe and stick with < 500whp on a turbo setup end up making less than the guys with the fully built T-trim V2s or the few playing around with V7s. Only mention it all because of the wording. 95% of the time you're right, but it's not 100%.

Which is why I would recommend to OP, having stated his desire for a supercharger, build the hell out of the engine now in order to survive boost later. If the engine is built well, you don't have to stick with the standard V3 SCi, you have options.

 

turbos WILL always give more power, but if his motor is stock, a SC is safer... more linear power has a lower chance of snapping a rod than the instant surge at a certain rpm from a turbo... the whole point of turbos is cuz youre able to play with the boost and get so much more out of them than a SC... if he keeps the boost around 6psi, i think hes safe with either setup, as long as it is tuned properly... i think a dual disco potato at low boost would be a sick street setup... minimum lag, good power curve and potential for 700hp with a built motor.. i always recommend smaller twins on a street setup over a large single.... i myself HATE lag... if i was going for a fast 1/4 time, then id def go with the larger single since you are staying in the high rpm range the entire time after your first shift

 

It's a shame you started off that post the way you did, because the rest of it is pretty accurate. But I'm afraid people will disregard all the good info because of "turbos WILL always give more power"

You were just discussing a 400whp Turbo setup vs a 500whp SC setup a couple posts above, lol.

If you're looking for ***** out absolute best build money can buy, then yes turbos will get you more power in that case. But it's always going to depend on the entire build. Just having a shitty small turbo with low boost on a stock block won't get you more power than a V2 T-trim or V7ysi on a well built engine. But you know that (I hope). So when you speak in absolutes like that it makes the rest of your informative post seem suspect, and that sucks because the rest of your post is good.

 

Get the vortech over the built internals, you will be way happier.

 

Budget is the main restraint. The either or for a g is pretty much a no brainer.