Hey guys,

I'm trying to plan out what I want to do to my Slant. I'm wanting a street demon, my wife has the street friendly fuel efficient 4 cylinder, so I want something a lot more aggressive on the street. Not that fuel efficiency isn't important but it's not my primary goal. I honestly don't care about it's ability to turn a certain time in the 1/4 mile because in all likely hood it'll never see the track. I'm a big fan of the idea of not having to rev the hell out the slant so I want to stick to a long rod set up, in fact, the 260 build of Doc's is really appealing to me. I'm just wanting to lay out my plan and get some feedback.

Engine rebuild
-.105 over bore
-.Longer stroke per Doc's article
-Roller Mechanical lifters (heard they are too expensive per the benefit?)
-New cam (not sure the specs, the more I try to learn about cams the more confused I get as it changes so much downstream)
-New Oil Pump (not quite sure about this one, I see things mentioned here and there about medium capacity oil pumps)
-timing roller chain? (Can some explain this to me? It seems like a common upgrade that people make when rebuilding. What is the benefit of a double to a single?)
Head rebuilt
-Ford 300 valves (heard those are quite large and shouldn't have shrouding issues with .105 over)
-Not sure about springs
-Port & Polish
MPFI
-Megasquirt
-Sequential (I figure that I can always fall back to batch or atleast dual bank injection if I need to but if I'm already putting out a lo of money for the conversion, I figure I should go all the way and do it right)
-Controlling Spark via Megasquirt (probably get it professionally tuned per Matt Cramer's book's advise)
Turbo
-Twin or single? I'm thinking twin since I already have dual exhaust. Using two tiny turbos should give me boost throughout the entire rpm range where I plan to be (1200-2500, I've only rev'd it up to 3k once or twice)
-I'd like Megasquirt to control boost
-Boost up to X (determined by how much it can take on premium pump gas)
Rear Gear & Tranny
-I'm pretty sure I'm running the 2.74 gear ratio at the moment, need to swap it for a 3.23
-If the wildcap thing works out great for others, install a 200R4

All this being said, it's obviously a lot of thing I want to get done and I ain't rich. So my thought was to do one or two of these things at a time and slowly make my slant to be the street demon I want it to be. I'm trying to figure out what order I should do things in as well. The rear gear change should give me some immediate results without interfering with other things or cause duplicate work. While doing MPFI prior to the rebuild will result in re-tuning. Adding the turbo after that would result in even more re-tuning.

I need some guidance with the whole thing as it is a bit daunting. In all likelihood, I'll probably have to hire someone to do the whole rebuild for me as I live in an apartment complex. Most of the major changes won't be for at least a year but I'd like to get a plan down so I can start keeping an eye for parts and good deals. Well there my idea, all feedback and suggestions are greatly appreciated. Also, if anyone can point me in the direction of some good resources on the questions I had above, that would great as well.

Thank You,
Aspen76

_________________
76 Dodge Aspen
225 Super Six w/ Dutra True Dual Exhaust

http://i1245.photobucket.com/albums/gg5 ... AG0095.jpg
http://www.youtube.com/user/BZuko1?feature=guide

Looks like a plan, you'll need some money to get it all done.
If running overdrive, why bother with 'street' gears? The final ratio in OD is so high that you won't get out of 3rd to be "fun"...with OD you can easily run 3.55's or 3.91's to help move your heavy car with or without the turbo. If your car has a 7 1/4" rear axle, before the turbo goes in, you might want to scope out a craigslist 8 1/4" FMJ rear axle (some guy might have deeper geared rear for cheaper).

-D.Idiot

How much would 3.91 limit me on the street/highway with a 3 speed auto (prior to trans swap)? Like you said D.I., money is needed but I'm substituting it with time. I think the axle and rear ratio seem like a good place to start if I can run the 3.91 (or 3.55) with 1:1 being my best trans ratio for a few months until money builds up for the wildcap and 200R4.

After that, I think fuel injection. Re-tuning seems to be something that will have to happen regardless.

Thanks for the help,
Aspen76

_________________
76 Dodge Aspen
225 Super Six w/ Dutra True Dual Exhaust

http://i1245.photobucket.com/albums/gg5 ... AG0095.jpg
http://www.youtube.com/user/BZuko1?feature=guide

Rear gearing for a 1 to 1 final drive is a lot different then what an OD trans set-up will need.

Keep in mind that a nice highway RPM for a SL6 is 2600 to 2800 RPMs
So with a 1 to 1 trans, a 2.94 is a nice gear. (24.5 dia. tire x 70 mph = 2822 RPM)

Use a 3.55 and the RPMs are now 3408 at 70 mph.
Go to 3.91 and RPMs are 3754.

You can adjust your tire size or driving speed to off-set some of the gear ratio but not a lot.
Use an on line calculator to help "run the numbers".
DD

http://www.advanced-ev.com/Calculators/ ... index.html

Doc is correct. I wasn't sure whether you were progressively tackling the grocery list or taking it on at once (easier to overhaul the engine and attach the tranny and dump it all in at once usually if both are out).

If staying with the 904 then 2.94/3.23 is good for now.

-D.Idiot

That makes sense. I was going to attempt to progressively take on my list but it seems like you're both right. As I've never rev'd my engine past 3.2k on the road, I don't think 3k+ will be good for 70 mph (even though 90+% of driving for me would be under 60).

Not sure what my current tire size is, just went out to check but couldn't find my tape measure (wife doesn't remember where she put it after she was measuring windows...)

It just gonna suck saving up that much money to get it all done at once. I think I'm looking at least 5k for the engine rebuild, 2k for Fuel Injection, 2-3k for the trans swap, and I'm not sure on the price of a rear axle and rear gearing. It'll definitely be awhile before I can comfortably sit on and spend 10k. Please feel free to adjust my guesstimation if im way off.

Thanks for the help guys,
Aspen76

_________________
76 Dodge Aspen
225 Super Six w/ Dutra True Dual Exhaust

http://i1245.photobucket.com/albums/gg5 ... AG0095.jpg
http://www.youtube.com/user/BZuko1?feature=guide

There is a craigslist add for someone in your area parting down a 1976 Volare Station Wagon...because of the weight those generally got 2.94 rear ends, and most got 8 1/4" rears...you could see if you could pull it for $75 and make a 'deal deal' with the guy to start.

-D.Idiot

Do the engine... or the trans first, then keep moving thru your list.
The day will come when you will need to make a rear end gear choice but that choice will be easier if you have the other major items, already in place.
Oh... and your driving habits have a lot to do with gear selection...
Currently, my DD Dacuda is 98% across town "commuter car", all posted speed limits are 45 mph and under... I currently run a 3.73 in the car.
I take a different car if I need to go long distances on the freeway.
DD