200 I6 rebuild for Turbo sugestion's?

[matt1967]

I want to rebuild my engine for the Turbo now, I have the funding I need to do so ( to a point ) I have a stock '67 200 with 9.2:1 comp. I would like the comp as low as it can be for the turbo, the engine will be driven 90% on the street and need to be reliable. I'm willing to get new heads/ pistions. what should I get?

 

[addo]

I'd start with a whole new motor. Either a crossflow six, or an OHC. That will enable you to gain better control of the fuelling, via EFI. There's also more people who've added turbos to them, than the log motors.

If you must stay with a log head, look into fuel injection and electronic spark control as a first step. That will do nicely on an N/A motor, and can then be transplanted and tweaked for a turbo setup.

 

[matt1967]

I'd start with a whole new motor. Either a crossflow six, or an OHC. That will enable you to gain better control of the fuelling, via EFI. There's also more people who've added turbos to them, than the log motors.

If you must stay with a log head, look into fuel injection and electronic spark control as a first step. That will do nicely on an N/A motor, and can then be transplanted and tweaked for a turbo setup.

I wish we had cross flow and OHC small 6's in the US, but we don't. were stuck with log head pushrod engines to work with. I was thinking of using a DSII electronic distributor. and have been thinking about EFI, but the cost would kill me, even doing it with junkyard Chevrolet parts.

 

[Funky Cricket]

EFI has to be cheaper than a new head.

I would try to find another block to build up, 1980 or new (for the E0 head).

Mild cam if you can find one, and a FAST EFI on off the DUI distributer with an inline fuel pump on the frame rail. ( i know some people don't like using the distributor as the cam sensor, but hey, less parts to buy, and this is budget)

get that running well, then plumb a turbo on to it, retune, and your good to go.

(sounds easy doesn't it... )

 

[matt1967]

EFI has to be cheaper than a new head.

I would try to find another block to build up, 1980 or new (for the E0 head).

Mild cam if you can find one, and a FAST EFI on off the DUI distributer with an inline fuel pump on the frame rail. ( i know some people don't like using the distributor as the cam sensor, but hey, less parts to buy, and this is budget)

get that running well, then plumb a turbo on to it, retune, and your good to go.

(sounds easy doesn't it... )

I was thinking about a 1980 Head, My head needs rebuilt and it has smaller combustion chambers, 58cc where as the '78 up heads have 62cc, so lower, safer compression ratio for turbocharging. what is a FAST EFI? sounds like somthing to look into.

 

[wallaka]

One of the simpler standalone EFI controllers. It's definitely workable and supposed better for beginners than MS would be. Of course, it's lots more $$$.

 

[matt1967]

One of the simpler standalone EFI controllers. It's definitely workable and supposed better for beginners than MS would be. Of course, it's lots more $$$.

I could use this controller with GM 2.8 V6 parts tho?

 

[CZLN6]

Howdy Matt:

Simply going to a late model, large chamber head, milled .010" to level and using a .050" FelPro head gasket will drop the CR to 7.8:1.

I would encourage you to deck the block at least .010" to level. Assuming your block is a typical .025" deck height block, that would leave a CR of 8:1. Decking to zero, which I'd reccommend, would give you 8.2:1.

If necessary you could go to a Calif Emission 13cc dished piston which would drop your CR to 7.6:1

Be sure to build the bottom for strength, lightness, balance and proper turbo clearances.

Adios, David

 

[wallaka]

One of the simpler standalone EFI controllers. It's definitely workable and supposed better for beginners than MS would be. Of course, it's lots more $$$.

I could use this controller with GM 2.8 V6 parts tho?

No clue. I know they sell a 'kit' with all of the sensors and whatnot, and that GM and Ford sensors are supported, just not which ones exactly.

 

[matt1967]

Howdy Matt:

Simply going to a late model, large chamber head, milled .010" to level and using a .050" FelPro head gasket will drop the CR to 7.8:1.

I would encourage you to deck the block at least .010" to level. Assuming your block is a typical .025" deck height block, that would leave a CR of 8:1. Decking to zero, which I'd reccommend, would give you 8.2:1.

If necessary you could go to a Calif Emission 13cc dished piston which would drop your CR to 7.6:1

Be sure to build the bottom for strength, lightness, balance and proper turbo clearances.

Adios, David

Thanks for the help. I plan on getting a remanufactured head of the right casting, should I still mill or check it with a flat bar ( the kind with the machined str8 edge, for checking cylinder and deck straightness with the bar and feeler gauges, and mill if it's out of spec? I take an auto shop class and we have all the resources, such as the flat bar, cylinder hones and such, would need to have it sent to Napa down the road from the autoshop to have it decked the .010 , and possibly bored out if need be.
are the california 13cc dish pistions the Cast dished TRW pistion's that Mike sells on classic inlines?

 

[matt1967]

One of the simpler standalone EFI controllers. It's definitely workable and supposed better for beginners than MS would be. Of course, it's lots more $$$.

I could use this controller with GM 2.8 V6 parts tho?

No clue. I know they sell a 'kit' with all of the sensors and whatnot, and that GM and Ford sensors are supported, just not which ones exactly.

Thanks for the help. I could always go to affordable Fuel injection and get 1 of there tunable box's, there designed around the GM parts

 

[Anonymous]

I plan on getting a remanufactured head of the right casting,

Eeehhh....I don't like the quality coming out of the "volume" rebuild shops.
I would get a nice core yourself and do it right.

If you plan to turbo the car, you WILL want to do some upgrades to the drivetrain. Your stock trans may not handle much more power. If you plan to make a fair amount of HP, think about getting the E0 block also (Big Bell) so you can use a better trans.

 

[matt1967]

I plan on getting a remanufactured head of the right casting,

Eeehhh....I don't like the quality coming out of the "volume" rebuild shops.
I would get a nice core yourself and do it right.

If you plan to turbo the car, you WILL want to do some upgrades to the drivetrain. Your stock trans may not handle much more power. If you plan to make a fair amount of HP, think about getting the E0 block also (Big Bell) so you can use a better trans.

How much do you think a 6cyl C4 will hold to? that's what I have. If I get a new block, I'd start with a rebuildable 250, a SBF C4 shouldn't be hard to find. if I go this route.

 

[Anonymous]

1) How much do you think a 6cyl C4 will hold to? that's what I have.

2) a SBF C4 shouldn't be hard to find. if I go this route.

In stock form...not much. They didn't get the good internal parts like the V-8 trans got.

Small bell (157 tooth) V-8 C4's are getting pretty dang hard to find.
Lots of AOD, FMX and C5 out there, and 164 tooth (large bell) but 157 tooth are getting rare.

 

[matt1967]

1) How much do you think a 6cyl C4 will hold to? that's what I have.

2) a SBF C4 shouldn't be hard to find. if I go this route.

In stock form...not much. They didn't get the good internal parts like the V-8 trans got.

Small bell (157 tooth) V-8 C4's are getting pretty dang hard to find.
Lots of AOD, FMX and C5 out there, and 164 tooth (large bell) but 157 tooth are getting rare.

what about rebuilding my 6cyl C4 with later C4 parts? We also have all the tools and Spec manuals for most any Transmission rebuild.

 

[Anonymous]

what about rebuilding my 6cyl C4 with later C4 parts? We also have all the tools and Spec manuals for most any Transmission rebuild.

That's an idea.

here's a good thread to learn from:

http://www.fordmuscle.com/forums/c4-tra ... _9911.html

 

[matt1967]

what about rebuilding my 6cyl C4 with later C4 parts? We also have all the tools and Spec manuals for most any Transmission rebuild.

That's an idea.

here's a good thread to learn from:

http://www.fordmuscle.com/forums/c4-tra ... _9911.html

Thanks for the link. I read most of that, will read the rest tomorrow.

 

[Anonymous]

what about rebuilding my 6cyl C4 with later C4 parts?

Be careful about input shaft spline sizes....if you are looking for a lot of power you may have to have a custom converter made with a 26 spline input shaft bore.

 

[matt1967]

what about rebuilding my 6cyl C4 with later C4 parts?

Be careful about input shaft spline sizes....if you are looking for a lot of power you may have to have a custom converter made with a 26 spline input shaft bore.

I don't know what I'm looking at for power, but probably in the range of 200-300 HP.

 

[Anonymous]

I don't know what I'm looking at for power, but probably in the range of 200-300 HP.

That won't kill a trans or converter anytime soon.
It will actually depend more on how much torque it makes, not HP.