getit

Hello guys I have a 3rd gen that Im wanting to build a turbo motor for. I have a 350 4 bolt block and a 2 bolt as well. I am planning on a carbed application most likely upgrading to a FAST efi in the future. I will be using a 700r4..the intended use of this car is a street/strip car. My horsepower goal is around 600, from what Ive been told by machine shops a sbc block will last to about 650.(Im sure this varies). Here are my questions:

What turbo would you guys recommend. I have looked at maps..and well thats why im here! lol BTW I can get a turbo but im working on the size thing.?

What size motor would you build considering the above?
355-391. Oh I have a victor jr intake as well.

BTW the fabrication/piping/chassis work will be done by a friend..

compression should be around 8.5:1..is this to low?

Im sure I missed alot of questions..please fill me in as I hope this is a informative post.

TransAm12sec

http://www.turbomustangs.cohttp://ww...omustangs.com/ is a popular site for information about turbos.

One of their links is
http://www.theturboforums.com/turbotech/main.htm

There are more details to look into in order to know what would be an optimum combo; cam, heads, intake.

Switching from a carb to efi may cause an issue with cam choice; however I don't know enough to give you an informative answer.

Calling manufacturers such as Garret and Comp Cams will also help your build. They will know their own product the greatest.

PETE

iTrader: (1)

Generally the theory is cams with a 115LSA are better in a turbo car!

Then again some turbo Buick motors run awesome with 110/112 LSA's

2 bolt blocks with a splayed conversion on the mains will hold whatever you might wanna throw at it(within reason). Steel crank, don't skimp on the rods or pistons! H beams, standard length.

Forged pistons are a not needed(hypers do work), but your tune better be on or they'll end up in pieces. Forged is good insurance IMO.

Mild heads(vortecs or something similar). Cam= your better off talking to a few companies. Some guys like single patterns others dual, LSA's vary as well.

Turbo size depends on what you wanna do! I prefer to buy once! A 66mm wheel would be decent on the street on a smaller motor. Might not flow enough for a larger motor. I would use a 70 minimum and go up from there based on your combos requirements.

Be prepared to spend some cash to get the 700 to live though. A 400 would be a better option for longevity.


Good luck with your build

junkcltr

iTrader: (1)

First things first, get your fonts fixed. They are obnoxious.

8.5:1 is fine. Go with a 60mm wheel or bigger. I run a 110* LSA cam. The LSA all depends on your duration, turbine, and exhaust. Carb is fine. Modify it for boost and adjust jets & PVCRs. Victor JR is good with the proper carb and cam.

shocker89bird

I agree with most of the guys so far. I would say as far as blocks you can either run the factory 4 bolt block set up and throw some studs in it or run the 2 bolt with splayed caps. It is better to have a strong piece of mind and not worry about it later. A factory 4 bolt will take around 800hp and a splayed block is around 1000hp.

getit

shocker..I disagree with the 800/1000 on a production block..maybe a motown or a Dart.

Sorry junk font is now fixed!!!!

The pistons I have picked are a forged 8.3:1 with a 64 cc which im thinkin a vortec head w/a 355 (splayed). The turbo i am looking at is a turbonetics (sp)? 62-1. Is this the right size?...Im new at this...blow thru carb..any suggestions on who I should deal with...or brands..etc. Vic jr intake. headers will be fabbed by a buddy. Any other suggestion I know I missed some things 6 inch rods or 5.7? of course a steel crank. any help would be appreciated.

xpndbl3

iTrader: (5)

go to the turbo mustang site and just read and read and read for a week. then come back with more questions than answers. Really you'll need to research the basics on your own off that site....the FAQs and stickies explain it all

D's89IROCZ

I like the font ... nice and easy to read . Yeah I would not try to go to big ... make it a sweet compliment to your power band ... I am no expert at all I just think some in the search for topend .... loose all the fun down low

getit

sounds good will do.

junkcltr

iTrader: (1)

I would go with something bigger than a 62mm inducer for the engine you described. A good steel crank, rods, pistons will be happy a very long time at 700 HP if clearanced properly. Maybe a 70mm inducer or a little bigger. Turbomustangs.com has a great website link on modifying Holley carbs for boost. Make sure you buy a Holley jet assortment kit if you go that route. A lot of people recommend CSU carbs for a "bolt on" blow through carb.

getit

Thanks junk I am working on the formulas that are at turbomustangs...alot of info!! Looking at compressor maps now. The class I want to run has turbo size restrictions so...I want to use what I have already....so cubic inches/turbo will play a huge part in making it somewhat competitive.

junkcltr

iTrader: (1)

This should help with the comp. maps:
http://www.gnttype.org/techarea/turbo/turbocalcs.xls
Download it and save to disk, then use MS-Excel or OpenOffice Calc to use the spreadsheet

Put in your RPM, engine VE, etc and it spits out HP, injector size, fuel pump requirements, etc. It gives boost pressure ratio and lb/min for reading comp maps.

Race class! Forget what I said about the 70mm inducer then. Pick one that works best for the class you are in.........basically, like you are already doing.

Check out that spreadsheet. It will make things easier on you with the comp. maps.

getit

Thanks junk!! I appreciate the help! You have been the most help so far. Granted you have a turbo car. I just want to spend the money once..although I have thought of a Junkyard build...I question how long my fun will last. Im going to figure two combos and see what they come to be. Then I can begin to build a short block.