Turbo Setup

R

ROADBLOCK

New member
So far I've accumulated the following parts:

Complete 350 Small Block Chevy
305 Cylinder Heads

One of my options im considering is a carb turbo setup, since i havent seen that many. I know i would need a blow-through carb(wtf is this and how do they work?), turbo, intercooler, etc... all that crap. Just wondering if anybody knows anything about turboing a carbureted motor

any help would greatly be appreciated. I'm considering turbo SBC or Nitrous SBC
 
Most of the blow through turbo stuff I have seen carburator wise cost so much money its cheap to EFI most of the time.



ROADBLOCK said:
So far I've accumulated the following parts:

Complete 350 Small Block Chevy
305 Cylinder Heads

One of my options im considering is a carb turbo setup, since i havent seen that many. I know i would need a blow-through carb(wtf is this and how do they work?), turbo, intercooler, etc... all that crap. Just wondering if anybody knows anything about turboing a carbureted motor

any help would greatly be appreciated. I'm considering turbo SBC or Nitrous SBC
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Turbo's are never cheap.. spend the $ and do it the right way or run nitrous if you're on a budget with a set of vortec heads and a decent nitrous cam.
 
What knid of power are you looking for? To add a little or alot? To add alot, send the block back, count on spending alot of money and I mean alot. Aftermarked block, forged everything within a tenth of a tenth, transmission upgrade, rear end up grade and so on, four link system or ladder bars, shocks and the list goes on and on.
 
ROADBLOCK said:
So far I've accumulated the following parts:

Complete 350 Small Block Chevy
305 Cylinder Heads

One of my options im considering is a carb turbo setup, since i havent seen that many. I know i would need a blow-through carb(wtf is this and how do they work?), turbo, intercooler, etc... all that crap. Just wondering if anybody knows anything about turboing a carbureted motor

any help would greatly be appreciated. I'm considering turbo SBC or Nitrous SBC
Click to expand...


Call csu, they will hook you up, dude is awesome. Talked me thru alot of shit over the phone and I hadn't even bought one of his products yet.

Carb is way cheaper than efi trust, your injectors will cost as much as the carb to support the same hp..

the 305 heads in a low buck boosted app wont hurt you to much, there is a guy who just went 9.91 on some junk iorn heads and a stock hyper bottom end 302 with a aod full weight car..


i knwo fo one small blaock chevy makeing well over 900 at the crank with vortec hads untouched ina blow thru app.
 
My only issue with blow through is that you wind up with oddly shapped AF curves. CSU builds a great carb I have been privy to play with one or 2 on some blow through big block stuff and even then its still some work to get right.


Either way a low power setup should be easy to inject with factory mangement parts. If he;s interested in something like this try the DIY-prom forum over at thirdgne.org. Some good info there on how to EFI Small chevys with factory junk.

igotaneed4speed said:
Call csu, they will hook you up, dude is awesome. Talked me thru alot of shit over the phone and I hadn't even bought one of his products yet.

Carb is way cheaper than efi trust, your injectors will cost as much as the carb to support the same hp..

the 305 heads in a low buck boosted app wont hurt you to much, there is a guy who just went 9.91 on some junk iorn heads and a stock hyper bottom end 302 with a aod full weight car..


i knwo fo one small blaock chevy makeing well over 900 at the crank with vortec hads untouched ina blow thru app.
Click to expand...
 
It will be easier to turbocharge an efi system, and any efi car an be boosted up to 5 psi on stock equipment. 9.2 to 1 compression and lower is what you want for you motor. What you need to invest in is:

Msd Boost Timing master - this will allow you to retard the ignition timing to every pound of boost. Usually .5 to .75 degrees to every pound of boost, this is good for 5 psi. (starting at 0 psi on Msd's boost scale)

FMU - Fuel management unit will increase the pressure in your fuel rail to every pound of boost. The ratio you will need for the FMU is a 1 to 7, seeing that you are only going to boost 5 psi. I have a tweecer to tap into the ecu, but it is not necessary. Jack Roush doesn't chip his supercharged 5 psi mustangs, he uses a FMU instead, check it out for yourself.

Larger fuel pump - at least 190 gal/hr

Msd Blaster coil - you need a coil that will be able to ignite the 94 octane you will now be using.

Copper tip spark plugs - You will need to run the copper plugs because they get rid off heat better. The best part is that they are always the cheapest ones to buy. Set the plug gap at .25 to .30.

Recirculation valve - I use one valve for the whole system, it is off a 88 volvo 740 turbo. It is completely adjustable.

The best set up that I like to use is a twin turbo set-up on my cobra. The smaller they are, the cheaper they are. I run two garrett t3 off a 87 turbocoupe. I got them rebuilt at Michigan turbo for around $500 each. A 2.3l motor is half the size of my 5.0l and that is why I used them. With this set up I have around 500 wrhp and about the same for torque. I built/fabricated this set up for under $1700.00. The biggest problem I have is over boosting. I designed my systems for around 500hp, I figured that is what the motor, trans, and rearend can hold. I have been driving this car daily for the last 3 years and I have no problems. I ease into the boost after second gear going into third so I have traction and so I won't beat up the drive tran.

Hopefully this will help you out if you are still deciding to go efi or carb. All my vehicles are turbo charged, boost is addictive. By the way, get rid of the cats!!!
 
dadnova said:
What knid of power are you looking for? To add a little or alot? To add alot, send the block back, count on spending alot of money and I mean alot. Aftermarked block, forged everything within a tenth of a tenth, transmission upgrade, rear end up grade and so on, four link system or ladder bars, shocks and the list goes on and on.
Click to expand...

Amen!
 
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