Ok.i have a machine shop at my expense to start with. I want to be able to piush up to 16lbs of boost. I have a t3/t4 hybrid turbo. my block is a 350 LT1 out of a 93 camaro z28. I am looking for a good lower end kit. like 400 crank to create a 383 stroker? i kno a lot about cars and work at a napa. just need to research and i figure you guys could help. trying to get bout 600hp from the car. its going in my 92 rs....btw.I cannot find anything for a 350 with single turbo anywhere.thanx

 

Ive seen a car on here that has a stock l98 block(2or 4bolt IDK), stock crank gm 5.7 pm rods, and speed pro 8.5-1 forged pistons. stock heads zz9 cam and a single turbonetics 62-1 turbo intercooled. 570rwhp @ 10psi. says he runs 14psi and is capable of 18psi. he runs high 10s with 14psi and drag radials. Im looking to build a somewhat similer setup as this. but I personaly dont think strokers are needed with turbos honestly. cheaper and easyer to build 350 turbo then a stroker turbo.

 

The t3 ehahust housing is too tiny for a 350. Get rid of it and get, at least a T4. 16lbs of boost would more than double the power output of your NA motor, so it will be more like 700 hp at that level but your current turbo will never get you there. Go to turbomustangs.com and do some reading. More boost is not always better, and you dont want your turbo maxed out because then it is out of its efficiency range and just adding heat.

 

ive done a lot of turbo research and the t3/t4 is an amazing turbo.used in many different applications handling over 20+lbs of boost.so its not gonna max it out.plus ive alrdy got the turbo.got everything for it for 600$ including intercooler and bov et the whole kit.bought froma frind.might as well use it.i am thinking bout going with 383 forged kit from eagle.imma port and do full head work on my heads. but another question. what is the best cam for a 383 turbo?power band 25-6500? or mor like 1500-6000?

 

Don't take this the wrong way, but reading what you've written so far you need to do alot more research and get some more experience before doing this type of a project, or you're going to be doing it 2 or more times.

16 psi with a good sized turbo on a 350, assuming excellent cylinder heads etc will make MORE than enough power to annihilate an eagle bottom end.

you're looking to make power in a range thats going to require alot of very expensive, high end parts if you want it to be reliable and enjoyable.....what kind of bottom end? the answer is simple.....the best parts you can possibly afford.

In a perfect world, a forged callies crank, or crower/lunati etc.....and a VERY good set of rods.....oliver, manley, etc......that are rated for over 1,000hp with arp2000 rod bolts.....and at the power levels you'd be looking at with that kind of boost, assuming everything else survives you're going to be at wits end of a factory block....and you'd be looking to get into a dart little M block or the like.

there's alot more to this than you seem to be aware of, take it from people who've already done this.......as someone already said, go spend some time on the turboforums at turbomustangs.com......the best board on the internet for forced induction/turbo information.

 

i dont think u under stand the turbos fully a single t3/t4 turbo on a smallbock will not work out to well.

now twins on the other hand with t3 hotsides would work


im gonna have to assume the turbo u got has a t3 .63 or t3 .8x housing

now a single t3 .63 would choke the motor above say 3,000 rpms
twin t3 .63's would even choke the motor above 5,500

 

a 350 moves too much air for any and i mean any t3 housing. in a single setup. but dont listen to anyone currently running boost. install the t3 housing and floor it. then open a new thread about how you over sped the turbo and blew up your engine.

 

Thanks to you who r trying to help. Im in need of constructive criticism and knowledge thats why i made this thread. But to those who are being jerks....and telling me to try the turbo and blow my engine up I don't want it on my thread.thanx. so what ive gathered is i should sell my t3t4 and run a t4 housing turbo for this application. When i said 16lbs i didnt actually want to run that in my car i want to run around 10lbs but i want a lower end that could handle more just to give extra engine life(if that makes any since).to make it more streetable.Im trying to range 600hp will the eagle kit hold this?ive heard yes....but still unsure.i kno i can get super expensive parts and itll run better and last long when spending 10k on lower end but im trying to make a decent holding engine with low boost. anymore info is appreciated but pleez dont harass.

btw. wht kind of cam should i look into for proper single turbo application?

 

Im no turbo expert by any means but I do have a turbo diesel truck and have learned a fair bit about them. Example the stock turbo on my truck can make 550rwhp at about 30-32 psi, people have ran the stocker up to 50 psi but after 32 psi it is out of it efficiency range and is just over spinning and not pushing any extra air. People seem to think that more psi means more power but that just isnt the case. When upgrading to a bigger turbo most expect to see more psi but infact a larger turbo can move more air with less psi. Some aftermarket turbos will make 700+ rwhp but still only run 35 psi. Its all about the housing sizes. I dont know about turbo gassers much but I would think that you go to big and you will have lag issues also. I say research and you will find the perfect match. Good luck to ya

 

Ive done a whole lot of research online everywhere i can find.What ive gatherd is a T-70 is probably my best bet. but ive seen that is still a t3t4.yet you guys said it would die? most people say a T-70 will hold 750hp and will be easy spooling for a 383.is this correct or do i have something wrong? pleez help

 

A T-70 refers to a compressor with a 70mm inducer diameter. It says nothing about the turbine side. You chose what you want for a turbine. You want a T4 inlet flange minimum for a single setup on a 383ci engine. What is "easy spooling"?

 

here sell your turbo and get ahold of one of the turbo companys on turboforums.com formerly turbo mustangs. you can buy a master power t70 turbo with the correct 1.0+ar size for a single turbo in a t4 configuration.they sell these as cheap as 535 bucks for a brand new unit. and will make all the power you need and want. but will do it in a safe manner.
and im serious about the blow your engine apart. you will be over speeding the t3 frame by about 3000 rpm. get a turbo book and read it learn about compressor maps and area/radius for diff turbo sizes call turbonetics. or exile or precesion. they will tell you the exact same thing. when you overspeed the turbo you cook the bushing which cooks the oil which fries the motor and all the superheated air from trying to spin it too fast causes you to detonate and bang. great first try. now try again. we are trying to help you!
Sometimes help from people who know has to sound like bad news so you will listen.

 

here is a link to the turboforums page where they are selling at70 intended just for a good single turbo sbc. 350-400" motor

http://www.theturboforums.com/smf/in...96.0;topicseen
copy and paste

as far as cams go you can deff run a smaller cam with a turbo. as well as less gear and a way tighter converter.
shoot for a cam with a 114-115 lobe sep. you can getaway with 112 on a smaller hp level. just watch your spring pressures they need to be higher for the pressure on the intakes trying to push them open. and the valve seal is very critical. no less than a good 3 angle valve job.
lower end just get a used gm forged crank. or a eagle 4340 and h beam rods. and srp turbo pistons, cp, je, or evan trw. all have good pistons. .
get file fit rings and open them up some from stock motor settings. for the extra cyl tems.
proably on your motor .022-.024 top and second would be a good place to start.

oh yea if your doing blow through look for kevin at CSU. he did my e85 bt850. its dead on. tell him matt with the s10 and t88 told you to call.

 

twin t3 turbos will support 600 hp . IMO it is a waste.... 600 hp could be achieved all motor ,u might not know that working for Napa .

if you insist going turbo i would talk to precision or turbonetics.

using a small turbo will choke the motor before it will overspin. Engineers did not worry about "overspeed" as they equiped plenty of factory turbo cars with undersized turbos.

 

I am up for positive help but the first post u did was just attacking me. I will def look into the turbo though. Anyone have any ref on cam for the single turb?

 

look at nos cams any mfg just pay attention to the lobe sep. like i said look for 112 at least more would be better. it mostly depends on your heads. and intake. but also what kind of cam. are you wanting a hydro, solid, hydro roller, solid roller all that makes a little diff. the master power turbo are awsome units for the 535 price. my t88 was 2899. new so quite a price diff. they also have a s480 wich will support 1000+ for arround 650-700.

i know i was kinda attacking you. but like i said sometimes good info has to sound bad to get someone to listen.
if i was wanting to build a turbo setup for the first time and someone said yea go ahead and use a t3 turbo and blow your motor up. i would be like ok now why will it blow.. you can easily sell the t3t4 to any import kid looking to go turbo they will be able to spool it fine. and that will help you to get a good proper turbo. and deff not a china made unit that will blow apart.

look at this cam at lunati listed under supercharger cam.
would be a good cam low lift would work good with a vortech style head and 112 lsa.
http://lunaticams.com/Product.aspx?id=2000&gid=265

i hate comp cams so i dont recomend them . crane is ok i just love lunati custom solid rollers. they are bad

 

I have an lt1 so i figured ide try to use the alum heads.Ill do major head work new valves springs etc.ported too.I have a ram air intake from a 93z28 u said intake manifold will make a difference. it seems to look ok. ill try to port the intake too. whn it comes to cam. i have no clue wht would be a good type cam. hydrolic or not.not really sure with a turbo. wht cam do most people run? what would be more durable for the rpm a turbo needs to spool well?

 

gieven your intake ports are smaller and your exh ports are smaller the velocity will be higher so spool time should be faster. use a 1 5/8 header with a 2 1/2 crossover will help too. no reason why you should have to turn 6800. so look for cams that make power to about 6500 and good low end tq. your figure a turbo will add about 500 more rpm on top of the cam since its forcing in the air. the intakes a dual plane dosent work as good as a single plane. your intake should be good for a lt1. the lt4 intake is evan better. with the masterpower t70 id see no reason for it to start spooling arround 2800 and full boost by 3600. that gives your about 3000 rpm of full boost spooling and pulling. which will equal way fast.

 

Thanx matts. Ive learned alot. i found a gt66 turbo for 375$.The T70 turbos i found were all t3t4. would the gt66 spool correctly you think?

 

do you know what size the exh housing is.? the gt66 would work for your power level. so long as its a t4 style housing. proably needs to be a .96 or larger. spool will still be lightning quick.

 

did you look at the master power t70s? they usually have a 1.00 or larger ar. and are t4 housing.

 

Whats your budget? A scat crank would do you fine if you kept your rpms under 6500. Forged pistons.

Quality oil fittings and picking the right turbo to avoid as much heat as possible along with a must have good tune will keep you and your motor happy.

 

GT45 Full Tangential T4 Turbo .81 A/R V-Band Flange
Brand New in the Box with Vband clamp Included.
Contrary to most opinions - this Turbo spools early and
stays strong.

those r the specs on the site. .81 u think that will be fine.i lookd for the masterpower t70 but couldnt find a t4 style. i could only find t3t4s

 

i found a t70 with a .96 hot side. will this b big enough for the 383 or still too small?ive heard it will still choke the motor...heard a s400 is a better choice? if the t70 will work ide rather that but if a s400 is what i have to get does anyone know somewhere that sells them cheap?