3.0 SC to 3.x Turbo

[Drbraunsr]

As the title says - looking to raise my CIS 3.0 SC to something larger with a turbo.

Bruce Anderson's book shows: Mahle 3.2 liter turbo from 3.0 liter, 7.1:1 compression.
I've searched the forum and didn't find anything. If there is one, please direct me.
If not: is this only a piston/cylinder swap ?
I want to twin plug. Do the original SC heads stay ? (With machining).
Do the SC cams stay ? (maybe timed a bit differently)

Is the 3.2 the most recommended upgrade ?
Changing CIS to EFI

[tirwin]

What year 3.0?

Something to consider is that the later 3.0 motors have smaller intakes and are intake constrained compared to the earlier 3.0 motors.

Most people seem to talk about a 3.2 or 3.3 SS for the 3.0 with a higher compression ratio. I'm not familiar with a conversion to a 3.2 with a lower than stock compression ratio, but Bruce Anderson was the man. I just don't recall seeing the 3.2 turbo from 3.0 discussed here.

I know Porsche ran CIS on the factory turbos but if it were me, I would investigate an aftermarket EFI too. Seems like there are more good options than ever before.

Also I would count the costs of a 3.0 turbo conversion versus a stock 3.6 naturally aspirated. Lots of people have done the 3.6 swap.

Food for thought.

[scottrx7tt]

Check out the turbocharging forum for lots of threads regarding turbocharging a 3.0. I just completed my car a few weeks ago. My car already had 97mm pistons, and cylinders(9.5:1 compression)also carrera heads. I added the carrera intake a few years ago, along with a Tbitz megasquirt ECU.
Here are my mods
930 j pipe
Tial F41 wastegate
Kkk k27-7200 hi flow turbo
Straight through exhaust with a hi flow cat
Stock carrera fuel rails with 60 lb/hr Siemens/deka fuel injectors
Aero motive rising rate fuel pressure regulator
Microsquirt v3 ECU
Ford EDIS distributor less ignition
Ford Flex fuel sensor
Knocksense knock control
Ford crown Victoria spark plug wires
Gravity draining turbo Into the engine sump plate.
Large full bay intercooler
HKS blow off valve
My car is 9.5:1 compression, and I run 10 lbs of boost. I have not dynoed it yet, but seat of the pants dyno says 375-400hp. I run e85 fuel(e70 winter blend). I have not had a problem with knock. I run my ignition timing very conservatively, and like to see my AFRs around 11.5:1(still using gasoline scale)under boost. If I were to lower my compression, I would go in the 8-8.5:1 range. Running 7:1, or anything around that will give you very sluggish off boost power. That is a disadvantage with the 930 motors.
Obviously I am EFI, and EDIS ignition. You could probably not be able to get away with the HP or boost that I am making with CIS, or stock distributor set up. My recommendation would be to convert to EFI first, then add the turbo.

This last round, the actual turbo conversion, cost me about $2500. I sold a ton of parts, so that helped tremendously.

[Drbraunsr]

Before I move over to the turbo threads, I'm trying to get a consensus for the best platform to build a turbo motor.
To answer a few questions: year is 1980 SC - and yes, for sure moving away from CIS and into an aftermarket EFI.

Is it smart to build a 3.0 up to a 3.2 or 3.3 ? If yes, which is better ?
Does it mean simply larger pistons and cylinders - with same rods, crank and heads ?
(Will be twin plugged, so will the SC heads suffice ?)
Moderate boost, street only. Targeting 350'ish HP.

Want to turbo, just to say I did it - so not interested in a 3.6 conversion (at least at this juncture)

New to flat six's, not to big block stuff -- but the P-car motors are so expensive I want to get started on the right path.

(Old drag-type flatbottom guy. 1970 Hondo flatbottom big-block for 28 years. Those were the days...)

[Tippy]

3.2 is probably best for most power cheapest, 3.6 for peak hp and tq.

Older 3.0, rather newer 3.0.

Really think the 3.2 wins in the comparo for money to hp equation.

[scottrx7tt]

Stock 3.2 would make the most sense. BUT, if you could build a 3.2 short stroke with your 3.0(using 98mm pistons and cylinders, 8.0 to 8.5:1 compression) put 3.2 heads, and carrera intake, you will have a screaming engine that will rev faster than the stock 3.2 since it gets its displacement from a longer stroke. Or you could just turbo your stock 3.0 and run a little less boost, there are lots of guys on the forums doing just that.

[Drbraunsr]

I really do appreciate the input. I was stuck at a crossroads and this has helped me a lot. Probably go with a 3.2 with the shorter stroked 3.0
Looks like it's 70.4 vs 74.4 mm
Was planning on running a K27 7200 as you are and the Tial waste gate.
I'll look into the 3.2 heads since flow is the name of the game.

TRE is building me a set of 17" 9's and 11's and I'll run this past Dave B. for final blessing and then --- let the learning begin !

[jpnovak]

What engine are you starting with? What are your goals? What do you do with the car (Street, track, car shows, backroad bomber ?) What induction? What fuel system/ignition do you have in mind?

There are many options from mild to wild but you need to provide some more info to get a good recommendation.

[Drbraunsr]

Starting with 1980 SC 3.0 -- finished adding and painting an SC into a wide body with mild upgrade to torsion bars and brakes. Mostly street with periodic bombing around the hills of SoCal.
Out with the CIS and in with a twin plugged EFI from (Electromotive, I think)
Goal is 350+ HP. Basically want to build the car I could never afford to buy.
Was/is a father son project to this point.

[Tippy]

Originally Posted by Drbraunsr

Starting with 1980 SC 3.0 -- finished adding and painting an SC into a wide body with mild upgrade to torsion bars and brakes. Mostly street with periodic bombing around the hills of SoCal.
Out with the CIS and in with a twin plugged EFI from (Electromotive, I think)
Goal is 350+ HP. Basically want to build the car I could never afford to buy.
Was/is a father son project to this point.

If I'm not mistaken, a 3.2 in stock form boosted to .5 bar will net 350hp.

Keeping the stock compression coupled with modern EFI would be a beauty to drive on and off boost.

[DonNewton]

All this is great, but how do you expect to get past CARB on your bi-annual smog test. Your tag line says you're from north LA. As you well know, anything newer than 1976 must be smog tested and they (Smog Nazis) do look for modifications. So, good luck.

[scottrx7tt]

He could be in northern Louisiana?? If so, I don't think they have any testing there.

[Drbraunsr]

I am indeed in Los Angeles ---- "I know a guy"

[kevin.bodman1]

I grew up in Santaclarita and remember newhall hardware and Bills exhaust? I REALLY WOULD LIKE TO MEET YOUR FRIEND,as i have a 78 930 that needs some help with smog...nice to know that your so close as i live in pinion pines

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