[takid455]

the 73 & 73 tails are completely different. what do you have?

[eaglesan13]

I always thought the 73 tailpanel was identical to the 73 tailpanel

Originally Posted by takid455

the 73 & 73 tails are completely different. what do you have?

[bhakola]

Im an idiot....I have a 74. Thank you fo the help.

Bryan

[SD455DJ]

takid455 - Thanks for your car's bio. That is one steep 1st gear. A 3.04 first with a 2.73 rear would work like a 2.43 BW first gear with a 3.42 rear gear if they made such a number. That is a wide spread to 2nd, but, like you said, the grunt of the SD455 doen't really see or feel it. The previous owner installed Rhoades lifters on the original Y cam, I always thought it had the HC-02 cam in until we tore teh motor down a few weeks ago. The cam lobes and lifter bottoms looked great still, so we left it that way. Now I understand why it had such a non-lopey idle. I just thought the Rhoades were doing a great job of cutting down the low rpm duration from the 230 degree intake spec. Now it probably is closer to the 068 cam's specs between idle and 3000 rpm.

Who has both the numbers 13 or 14 cast into the right end exhaust port? My '73's original heads have the 14's. The trim tag's date is 07C if the means anything. Is their any difference between the two? Or just time of casting differences. I have a pair of NOS SD heads, one with 13 and the other 14. They have casting dates of J182 and K182 respectively. I'm sure ther are no physical differences except for the numbers and dates. Just wondering if anyone has any insight on this.

DJ

[johnta1]

I would figure it has something to do with the mold box (or whatever it's called)
They were probably a few mold housing that the cast iron was poured into.

[Larry Navarro]

Those HC cams are great. I used the HC-63 in my old SD 4speed car with regular lifters. That car was awesome fastand had a mean idle.
I bought Ken's last SD cam, the HC-62, which I plan to use in my '73.

[SD73]

Hey Guys, got an odd one for you. A friends 1973 SD has this valve on his intake. Originally it was screwed into the drivers side of his intake. It was thought to be originally there because it was a low mileage car. Under 40k at time of purchase. What looks like the metal version of the egr thermal valve was on the passenger side of the intake. His restorer reversed them.

I've never seen one of these with that odd looking connector on the bottom (check what I have circled in red in the first pic). Any idea what this is and a definitive answer as to which side it's installed on? My first thoughts were this was for the EGR, but then I thought that connector looking thing may actually be a vent that the valve for the distributor advance control has. Any insight would be appreciated.

The second pic is the type I usually see for EGR. Later ones were made of metal with a reduced sized upper portion.

[johnta1]

1st, I thought the SD intake only had the hole on the passenger side?

There was the mid-year EGR 'fiasco', which probably had different valves.
There were also 2 different ones on some 400 equipped cars.

The SD would have the later type valve, but don't know which of those might be correct. (if either one)

[SD73]

'73 SD's had holes for both valves. The early cars had a slightly different emissions setup, but by the time the SD's rolled around a system was firmly in place. In 74 tthey revised the intake with a single valve setup. That may be what you're thinking?

[johnta1]

I knew 74 had just one.
Saw some pics of the 73 and it only had 1 also.

[SD73]

Can't speak for all the '73s, but the SDs definitely had two.

[takid455]

I think that is the thermostatic vacuum valve. I need on for my 74 as it does not function . anyone have one. Doesn't have to be NOS, just a decent working unit.



I have a question regarding oil consumption on the SD engines. My service manual states that oil consumption is less than 1000 miles / quart. Like to see if that is experienced by others. also state if the engine is original or rebuilt.

[njsteve]

Saw the TAKID455 at Musclepalooza today. Nice to see someone driving the heck out of their car!

[muscle_collector]

i like that one.

[Brewster]

Yeap, kick ass. Enjoy that ride it looks original and awesome!

[spb350]

Sold my SD SR motor so I'm going to sell the extras I don't think I'm going to need. I have an Delco Remy HEI dist for SD's, I know this didn't come on them originally but its got the right gear. I'm wondering what its worth. Thanks

[SD455DJ]

Originally Posted by Larry Navarro

Those HC cams are great. I used the HC-63 in my old SD 4speed car with regular lifters. That car was awesome fastand had a mean idle.
I bought Ken's last SD cam, the HC-62, which I plan to use in my '73.

Larry - What are the specs on the HC-26 & 63 cams? When I rebuild the motor one of these blue moons, I would like to try the HC-02 cam with new lifters.

We found the culprit of the TA's breaking down on the way to Dayton a couple of weeks ago. It was the 'R' wire to the starter solenoid grounding against one of the bolt heads that connect the solenoid cap to the solenoiod body. We drove the car last Friday morning checking fuel pressure with a gauge while driving, which was just fine and, wham, it died again. Started up easily and not more than a mile later, quit again. Started for the third time no problem, and maybe got a half mile further it died again, except this time it would crank, but not fire. Luckily, we were only a half mile from Dan's place and had a tow strap (Dan was following in his van) and hauled it home. We got out the test light and found there was no voltage getting to the coil when the key was in the "on' position. We had voltage evrywhere else, just not at the coil. So, we dropped the starter and discovered the problem. Sure enough, the rubber insolation at the connetor was cracked enough to allow the wire to make contact with the bolt head. We wrapped the wire with electrical tape and rotated the terminal away from the screw head, reinstalled the starter after double checking the rest of the connections, and it started right up. We reconnected the MSD-6A (noticable difference in idle quality with it) and test drove it with no issues. It's frustrating that something so simple can ruin your plans, but, at least we found it and now have a heightened awareness should this ever happen again.

DJ

[takid455]

Steve - nice to meet you in person with the hemi in tow. Funny that your car was the one from the story on 287. I would say that would be a hard challenge to pass up if it were me. Keep up the good work on the 72 as it provides inspiration to many. Glad you enjoyed seeing the poncho. perhaps we could arrange a meeting when the 72 is on the road.

Brew MC - thanks for the complements. means a lot coming from you considering what you have in your stable. I really do enjoy driving this car. put over 3500 miles on this year. Can't see how some, regardless of condition, don't drive them more as it would be too tempting for me not to drive the SD. I'm the goon in the red shirt in the photos.

bob 350- probably not much as most swicth the SD to a smaller gear to mesh with modern (more available) cams with the bigger gear. I could see someone building an SD from scratch using the sleeve, however, that can be easily machined. I'd say 50-60 for the setup.

DJ - glad your problem was fixable with minimal effort. chalk it up to sh!t happens and enjoy. There are various grinds to the HC-62 (02) & HC-63 (03) cams throughout the years as cam manufactures changed lobe designs. However, each grind variation is close the others. I may install the HC-02 cam in 72 HO one day. It depends on what you want. the -03/63 cam is more aggressive than the RA4 cam but really rips. the 02/ 62 cam would be slightly less. If you search this site, specs are posted somewhere. I know the -03 is 242/252 @.050 and around .500"/.524 valve lift on a 112 LSA.

[1qikta]

TAKID455,

Thanks for coming by Sunday. After we talked I went over and got some good shots of your car. Chatted with your wife a few minutes as well.

Shoot me an email if I can help further... delaiglej@bellsouth.net

[KEN CROCIE]

The NEW HC-02 & HC-03 (since crane cant grind them anymore) spec out as follows:
HC-02 @ .050" 232int. 243ex. lift 478 int. 483ex. 108int. 118ex. C/L
HC-03 @ .050" 243int. 252ex. lift 499 int. 523ex. 108int. 116ex. C/L
All will work with stock installed height SD springs or my custom VS-13 springs