So i am New to the Eagle family. I have an 82 $ door with the 258. On the highway the car runs amazing i can keep steady at 85 90 with no problem however i have 0 take off... that car will not even Chirp a tire. is that normal lol?
Quote from: AMCLOVER258 on June 20, 2014, 03:30:01 PM
So i am New to the Eagle family. I have an 82 $ door with the 258. On the highway the car runs amazing i can keep steady at 85 90 with no problem however i have 0 take off... that car will not even Chirp a tire. is that normal lol?
Yes, it is quite normal. I assume you have and auto transmission and would bet you have 2.35 gearing in your axles which don't help at low speeds. Also, the stock 258 camshaft is too "mild".
>:( Darn.. So a new cam and all that lovely head stuff would help get'r moving a little more?
Is your tranny shifting gears early by any chance?
NO, it is weak though, it doesn't shift very smoothly.. like even if i put it in 1st gear( its a 3 spd auto with the OD) it takes off a little better but wont turn those tires!
The 4.0l head and cam swap will turn them.
No overdrive unless it was swapped in. Just a lockup converter. Swapping to 2.72 ratio will help you a lot and STILL give good freeway performance. Taller than stock tires kill the power too, because it actually CHANGES the effective gear ratio. Low profile tires will give you take off power again.
So 2.72 Ring and pinion and find someone to put it in.. i dont think i could go Low prof's that would look rediculous lol
Quote from: AMCLOVER258 on June 23, 2014, 04:35:24 PM
So 2.72 Ring and pinion and find someone to put it in..
You have to change gears in both diffs.
With the 2.35 gears it's like having a four-speed transmission that will only start in second. The lockup will definitely feel like another gear, it's more noticeable with 2.35 gears.
Back in the old days you really had to suffer, I have a Pontiac with an ST-300 (another GM two-speed transmission mostly unrelated to the famous Powerglide) and a rear around 2.9. It is positively glacial until you got the thing up over 40, even with a V8. I guess the point of that is even with the wide-ratio automatic you should have it could be worse. ;)
With the '82 you probably have a better chance of being able to swap the front gears for a 2.72 set, and the 2.72 with the wide-ratio lockup transmission is a pretty good compromise, 3.08s in a sedan or wagon are a good choice as well, it depends on if you do more highway miles or not. There are a couple of threads here that discuss the things you have to look for to see if your front end can be changed, not all 2.35 gears can.
Play around at http://www.grimmjeeper.com/gears.html (http://www.grimmjeeper.com/gears.html) and you'll see the RPM to speed. The "Dodge TF 999" has the correct wide-ratio gears. To see the difference with the narrow transmission used in 80 and 81, first is 2.45 and second is 1.45. For fun, my two speed ST-300 is 1.77 in low. These are all 1:1 in high, but they slip and act like a lower gear if they don't lock up, the calculator does a nice job of compensating for that as well.
Quote from: AMCLOVER258 on June 23, 2014, 04:35:24 PM
i dont think i could go Low prof's that would look rediculous lol
Time for some Photoshop! :)
If you plan taller tires, 3.08 is far better and leaves room for O/D down the road. I'm surprised no-one has taken me up on the 2.72 vacuum front diff (70K miles and rarely in 4x4) and Model 20 with 2.72 gears for $100 for the pair.
Quote from: carnuck on June 24, 2014, 01:13:04 AM
I'm surprised no-one has taken me up on the 2.72 vacuum front diff (70K miles and rarely in 4x4) and Model 20 with 2.72 gears for $100 for the pair.
I probably would if I wasn't on the opposite coast :/
That's always the way! I know of a wagon for parts in Spokane, WA that will be crusher bound (if not already done)
Hello, Is your vacuum advance working ??? if it's not working you won't have power during accleration, but will cruse OK. Another thing to check is the kickdown linkage from throttle to transmission. This boosts the trans pressure when you step on the gas, and lowers the pressure when your stopped and in gear. If this linkage fails in the low pressure position the trans will slip and eventually fail. Just my two cents .... Later, Iron Horse :o
I highly doubt any of my vacuums with the exception of the 4x4 Vac, even works.... it has had quiet a bit of the vacs pulled out however everything that is left is chopped to bits meaning ( maybe 1 or 2 are still whole lines the rest have been broken or cut) im kinda iffy on going and messing with them because last time i did she didnt like it one bit....
If you have even a tiny vacuum leak, the car will most likely run terribly. At the very least make sure any unplugged hoses are plugged and any cracked hoses are replaced. You can spray brake cleaner around the intake gasket and carb base while the engine is running to make sure there are no leaks. If idle changes at all when you do this, you have found a vacuum leak. You cannot properly diagnose other systems if the engine doesn't get good vacuum.
I have a vacuum gauge hooked up in my engine bay to manifold vacuum at the intake, which is quite helpful to show changes in vacuum while tuning.
It would be extremely helpful to us if you took GOOD pictures and posted them here. Take pictures of the engine, linkages, wiring, and whatever else you think might need attention. Then we could potentially tell you what needs work done or what lines need replaced/rerouted. It might be good for you to start a project thread too so you can keep track of progress and others can give their 2 cents.
Well i've put one up of the engine bay but to be completely honest she does run like a terd... i have to molest the pedal to get her going but once she gets rolling shes good. im looking to get another car soon so i can drop her off at my buddies garage at the highschool and let the kids take a wack at rebuilding her. when that happens the only vac i should need will be for the 4x4 because everything else is going mech. So around feb if any has preferably an sx/4 i may be looking to buy. other than that i've been eyeing these to matadors near by.