The TURBO topic

How much do ya think it would cost to put twin turbos on a 383 stroker? I'm guessing around the 8 or 9 grand area by the time the engine is complete.How much hp do ya think I could make?

If you were to build a 383 with twin turbos (which would be the best way to go) it would probably cost 6-9 thousand. If you just wanted to put twin turbos on an already existing 383, that would only cost about 3 grand, but you are asking for trouble by putting twin turbos on a motor that wasn't built to be boosted.

I have a friend with a 69 datsun pickup with a TPI, alcohol injected (only at higher rpm to prevent detonation), twin turbo 350 that puts down 591 rear wheel horsepower and gets twenty something mpg. With a 383 you could probably count on about 650-700 rear wheel horses.

[ February 05, 2003: Message edited by: drgnwgn289 ]</p>

I want to build the motor for the turbos.Its a 350 right now but I am boring it out to 383.What mods do you think would be the best for this? <img src="confused.gif" border="0">

I just bought a gale banks twin turbo set up for my 454 for 1000.00 and I figure another 3-4 to build up the engine with forged pistons rods and crank. I am trying to decide if i want to spend and extra 2000 and put a multiport FI on....oh god think of it a twin turbo injected 454 with race gas I figure about 1000hp

big block turbo <img src="graemlins/drool.gif" border="0" alt="[drool]" /> <img src="graemlins/drool.gif" border="0" alt="[drool]" />

alot and a whole hell of alot

can you bore a 350 out to 383? I don't know about sbcs and I don't really care to, but I thought you had to stroke them and bore them to make a 383 (350 with a 400 crank or something like that).
You need a forged crank and pistons, H beam rods and a high capacity oil pan. You want the strongest bottom end possible with plenty of oil and probably and oil cooler to keep wear to a minimum. You'll get the best results with a TPI set up but that is really pricey.

ya you have to bore it and stroke it.You can buy kits for that.

383 is a 350 block taken to 4.030 bore, then fitted with a 400 crank, 3.75 stroke. The crank has to be turned .200 to fit the 350 mains. And then you balence it externaly like the 400.

If you want to put the turbo set up together on the cheap, check out this link. It's the Junkyard Turbo message board. <a href="http://autos.groups.yahoo.com/group/jyturbo/" target="_blank">http://autos.groups.yahoo.com/group/jyturbo/</a>
These guys will have answers to all your questions. As for your motor, you definitely want forged pistons and low compression. My current project is powered by a turbocharged and injected 454.

Somehow CHEAP and TURBOCHARGE are two words that just dont seem to have much in common!

[quote]Originally posted by oldred:
<strong>Somehow CHEAP and TURBOCHARGE are two words that just dont seem to have much in common!</strong><hr></blockquote>

They fit together perfectly if you add RESEARCH and IMAGINATION.

I have less than $300 in my turbo for my 408 SBC. I spent $40 on a set of ebay headers to get all the parts to build my own. As for the engine, I will have around $3000 in the entire combo. That is with all the parts to handle 800-900 ponies. Just takes time and patients to round up all the parts at a good price. Of course you also have to know what to look for.

There is no better power adder in my opinion. You can build 1000plus horsepower engines that can be street driven. Of course when you start doing this the CHEAP and TURBOCHARGE start to not go together.

Chris

actually cheap and turbocharge goes together perfectly, just take a look at KA67,s profile, granted if you were to contact kenny dutweiller and ask fro a quad turbocharged 454 with digital injection and 1000 horsepower you would end up paying 25000 dollars for the engine, but if you are a little handy with a welder and do your research you can do the same for about 1000 bucks, if ofcourse you have the engine allready.

what i dont understand si why on earth you want to spend money building a 383 when you allready have a 350, i mean if all you want is more power then stick with the 350 and turn up the boost a pound or two.

a friend of mine (he is on here as 100kg) had an old POS toyota pickup with a stock headded 305 that put out 640 Hp at 24 pounds of boost, and thats with a junk yard semi-tractor turbo (volvo FL6 engine) and blowing through a 600 holley with no intercooler just plenty of water injection. I think he had about 50 bucks in the complete waterinjection system (and if you want to go racing just add 50% methanol to the water and you can raise boost another 4-8 pounds with no detonation...

take a look at this link of a guy building a twinturbo 1970 nova (with less than 1000 bucks in parts)

http://www.turbofast.com.au/TFmatch.html

stick with your 350 and spend the money on building a turbo setup, it i smoney much better spent instead if spending 2 or 3000 on increasing your displacement 9% (from 350 to 383)it will only equate to a 9% increase in power compaired to a simmilar 350

but with regards to your question on horsepower a properly built 350 should put out arround 700-750 horsepower at arround 6000 rpm and 14-15 psi. a 383 will be about 50 horses over that number. BUT a couple of twists in the wastegare actuaor rod and your 350 will have made up thad deficit easy... if you were to up the boost to 20 pounds and spin your 350 7000rpm you are well past the 1000 Hp mark, and i am sorry to say but i dont think any person in their right mind would like to take a ride in a stock suspension mid 70´s camarro with 1000 horsepower, and not be wearing a flak vest for when your tranny explodes or the car goes flying of the road..

so i think you need to set a limit, 14-15 up to 20 pounds MAX and some sane desicion on RPM and HP and you should be fine, also budget wise (28 pounds of boost is about four to eight times as expensive as 14)

i am actually also building a turbo car, its a screamer of a 1,3L (79 cubic inches) vw polo, can you hear the crowds roar?? i have so far spent 450 bucks and the power increase is from the stock 55Hp to 125Hp, That i a little over 6 bucks per pony (you dont get them any cheaper than that on such a small engine (next turbo project is on my soon to be (1-5 years from now but you all know projects) seaworthy 18 foot v-drive skiboat.. i am planning to find a cheap steel crank 327 for that one but now we are leaving the realm of reality and entering future plans and dreams..