355 small block

ok i have bad speeling so i sorry befor hand! but i needed to know some things!

im buying a 355 small block for my 86 firebird, now i need to know wich one is better for the small block for my car a supper charger or turbo charger??? i wount the max tork and hp i can get so i can show up theas rice heads!

You will get answers from "both" sides. A turbo is more "efficient" in that it takes nearly no power to drive it. A turbo will have a certain amount of "lag" no matter what brand it is or how it is set up. It can be overcome by driving style. A turbo may or may not become a maintainence nightmare. Buy the "good stuff" and don't base it on budget, and the chances of a long life are very good. An intercooler is recommended, especially for a streeter.

A supercharger is more "positive". That is, boost is immediate. Generally SCs are more durable, but at the cost of some power, as it takes power to make power. ProCharger is currently the most popular method of supercharging. It combines the benefits of both a belt-driven blower and the superior efficiency of a turbine.

We recently built a 383 LT-1 for a ProCharged '95 Camaro, but no feedback as yet. Be certain to keep your compressoin under 10.5:1 to avoid detonation on 93 octane. Either type of blower will add to the risk. An electronic engine management system is also highly recommended.

Jim

ok right now i have a carbrated moter and i have also hurd that its better to go fule injected for what im wounting to do! a turbo guy that comes to the shop i work at said that im better off with turbos, how true i dont know! i was thanking in the long run twin turbos with a fule injected sistem and then change to a manial other then an auto! whats your thoughs about that also??

I believe twin turbos will make more power, but will be VERY complex, and probably a bit on the "high maintainence" side. The ProCharger will be the most simplistic and trouble-free.

With an engine built at this level (more than 600 HP), it will be a bit easier to find a TH400 to "live" behind it, but there ARE manuals out there that can take it. The Richmond 5-speed has shown me something, by "living" behind some pretty stout big Pontiacs (notorious for low-end torque, which KILLS a transmission). I know of several that have replaced "shelled" TKOs and other smaller units (including Jericho) with the Richmond, and have had success.

Jim

honestly, you won't need either to show up the rice heads.

ok in not thanking about putting in any nitros i dont wount to kill myself with overkill and not just stupedity!!!!

ok so ive decided to go with the twin turbos with my 355 moter that has 6" rods right now its carbed aver thing is stock right now so at the moment i have the 305 in it ive also have decided to stay with the auto :( i know but better for my power now i just need to know how to get even more power with out getting to much over my head in deat

i was posabley thanking (coming from a computer geek so probly all wrong) with larger domed pistens defrent camshaft that for startes at lest lol

Dracon,

A couple of things. If you're really a computer "geek", as you say, your education is much higher than your spelling would indicate. Work on that. It's very difficult to follow what you are trying to say. If English is NOT your "first language", I understand, but it is still difficult to follow.

Are you saying you want to slightly modify the 305 as an interim "fix"? Your comments about twin turbos and not getting in too deep are not consistent with each other. It doesn't get much "deeper" than twin turbos...

Higher compression and "more" camshaft WILL make more power, as long as the rest of the combination is up to the changes. That would mean headers, intake and carb (or larger throttle body and "bigger" injectors), superior ignition system, etc. Fuel quality also comes into "play" here. Do you want to use 93 octane? Race gas? 87...?

Maybe you should define your goals and your budget. Then, we can begin making solid recommendations.

Jim

ok im not upping my 305 moter im swoping a 355 in and wounting to work on that one to make it stronger, and all i need to worry about is what i spend by the end of the year because im getting a 10-99 so all i do to it is conserderd as vichel mantnice as a bessnes car so its all tax right offs

ok in not thanking about putting in any nitros i dont wount to kill myself with overkill and not just stupedity!!!!

you should read up on the facts about nitrous and proper use of it instead of judging it on what you have seen in the movies.

lol ok i gess you beat me there! i will do just that then

Dracon,

Do you want to use 93 octane? Race gas? 87...?

Jim

right now the 355 ill be getting is in need of ither midgread gas or primem not shoure to much about what the defrence between them so please do inliten me!

Wow! where to start... You do know that if you go the twin turbo route, the entire rotating assembly MUST be forged components? We're talking, crank, rods, pistons. You'll need to have 4 bolt mains, and they should be splayed main caps too...AND the compression can not be high, you'd need to stay right around 9.0:1 AND with that much engine you'll need to run 93 octane gas at the minimum.
A few other things to consider would be to get the heads and block O ringed..your stock transmission will grenade behind an engine like that. You'll need a seriously upgraded transmission.
Then there's the heat in the engine compartment to think about, 3rd gen F bodies have cramped, hot engine bays without thngs like a turbo in there, and with 2 you double your troubles.
Even if you go with a supercharger you'll still need the things above...it is going to get expensive. Figure $1500 MINIMUM for an all forged rotating assembly. Throw in a grand or 2 for the machine work. Then figure on $6,000 for the turbos WITHOUT intercoolers (add another grand for them). Then there is the custom exhaust system you'll need to run those turbos...figure on a grand or more for that... All in, you are probably looking at $10,000 (or more) if you do the install yourself and over $15,000 if someone does it for you.

Thanks, Morely.

Dracon,

Like I said, it doesn't GET much deeper... (:- If you really need to have octane and fuel requirements explained to you here, you're in WAY over your head. I would advise you find a local "guru", tell him what you want, and just sign the check... There are plenty of sites out there that describe the relationship between fuel rating, compression, power output, detonation, quality parts, etc. Do a "google" on octane and compression. Start reading!

It is not my intent to insult you here. But this is a bit more of an "advanced" site, for those with an understanding of "the big picture". You need to do some serious research and self-education to understand what you're getting into, and how much it's going to cost you. That, I'm afraid, is beyond the scope of these threads. We can't just create a "perfect package" for you.

Jim

ok i thank you guys for yalls in put and i have looked into the cost of things and i dont know if you know much about allspeed perfurmise (probly speeled wrong too whats new)! they bilt a 69 camaro for rob some thing has a show on mtv the rob and big show! and there also making a new one for josh some thing a nother border for DC , a 69 camaro too but way defrent this robs!!!!

i acchely work there the only reasen im asking yall instad of them is because there always making fun of me because i am more of a teck geek then a gress monky! this truly is the 1st time ive done any things like this in work! so i can get the mets for the coust of that the shop gets them at aslong as i pay my co-workers to help me out since i dont know 1/1000 of what i need to get done!!

and like i said befor its all tax right offs! so what aver i spend on it that extends what the goverment wounts ill just get the rest back, and its just $ they'll make more! and if not i have one hell of a printer :D

huh?