The Turbo Super Duty Build. (Page 2/62)
CaddyRob SEP 29, 08:12 PM
Lookin at your main Caps, I was wondering.. arnt these engines pretty much a 307 with half the cylinders lopped off.. or something like that.. I was wondering can you get some SBC splayed Caps installed.. would add even more reliability.. since I know your Turboing... the more solid the bottom end the better right?
82-T/A [At Work] SEP 29, 08:25 PM
As I understand, it's a Pontiac 301 cut in half, not an Olds, Buick, or Chevy block.

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Todd,
2002 Ford Crown Victoria LX
1997 Pontiac Grand Am GT
1987 Pontiac Fiero SE / V6 5-Speed
1987 Pontiac Fiero SE / V6 (3.2L) Auto
1984 Pontiac Fiero 2m4 SE
1981 Pontiac TransAm (sbc 350)
1973 Volkswagen Type-2 Transporter

baldlobo SEP 29, 10:25 PM
could you measure what you measured on the iron duke as on the super duty
FastIndyFiero SEP 30, 12:11 AM

quote
Originally posted by baldlobo:

could you measure what you measured on the iron duke as on the super duty


Yes, that same block wall measurement was around .60". Consequently, the SD block is heavier, but well worth the added weight. On the main bulkheads you will find thicknesses of around .75". It is very beefy.

I actually have looked for 4-bolt main caps somewhat for this motor. These stock SD4 caps are very strong ductile iron, and when I talked to Kansas Racing Products about them they said that there haven't been any problems with them.

Btw, Cam For Sale

More tomorrow.
Nate

FastIndyFiero OCT 01, 12:40 AM

Now THAT'S what a crank is supposed to look like. I'm upping the stroke a bit from 3.00" to 3.100" inches. With the larger 64cc head volume, I'll still be right at 8.3:1 compression, perfect for a turbo.

Nate

FastIndyFiero OCT 01, 01:48 AM
Doh! I guess it would help to show the car that it's going in:

No, that's not me, it's my nephew. Smiling "wasn't cool" that day.

JamesCurtis OCT 01, 01:50 AM
now that's a thing of beauty, something I usually don't say referring to 4 cylinder's lol. I'm gonna be adding this one to my fav's, I've always been curious as to how a sd4 sounded, maybe i'll make it down to wichita one of these days and check it out.

James

Doug Chase OCT 01, 01:10 PM
Very nice, keep it up. A couple questions for you:

Where are you getting the Super Duty parts? Is this new stuff from KRP, or genuine GM SD stuff that you've come up with somewhere?

What's your bore size going to be?

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Doug Chase
Chase Race
Custom roll cage and exhaust fabrication

FastIndyFiero OCT 01, 01:49 PM

quote
Originally posted by Doug Chase:

Very nice, keep it up. A couple questions for you:

Where are you getting the Super Duty parts? Is this new stuff from KRP, or genuine GM SD stuff that you've come up with somewhere?

What's your bore size going to be?


The crankshaft and connecting rods are from KRP. They often have SCAT make billet cranks for them. The crank that I got is used, but still in very, very good condition. I managed to pick it up for pennies, relatively, as the race teams were all alowed to upgrade to a larger stroke than this one. One downside: the crank has a SBC output bolt pattern. I'm probably going to put an aluminum spacer in between the engine and tranny, and have a custom flywheel made.

The block and head I just basically scrounged the country for. I'm going to try to get some better pictures of the rods before it gets assembled, but everything is it the shop now. Here's a cruddy webcam pic:

They are forged I-beam rods with 7/16" ARP hardware, rated to about 10,000 RPM. They cost over $100 a piece new from KRP. It's a pretty good upgrade.

Bore size is 4.005".

Nate

FastIndyFiero OCT 01, 02:06 PM
Here was my project a couple of months ago:

A quick upgrade for the brakes. I would've done the 12" Corvette brakes, but the only thing limiting me there was my wheels, 15-inchers. And I like my wheels.

This images is larger than 100K. Click to view.

Sadly enough, I don't have time or $$$ to take the rest of the suspension off and give it a good rebuild. If I did though, I think I could turn it into some kind of crazy autoX machine. Revving to 9000 RPM at 16 lbs of boost with a short first gear could be VERY interesting. I think I smell rubber...

I'm planning to gain 100 lbs at most over stock 2.5. I also have no plans to remount the A/C compressor on the SD4. I would like to keep the weight lower, but hell, my turbo weighs 30lbs by itself. Hmm, 30lbs minus 20lbs of boost. It won't be too much slower with it on there.