As I get more involved with the replacing of various components on my 84' SE, the possibility in recouping my investment even this early in the process seems low. So I am planning ahead for the future over the next few years. The suspension is the next item to be completely replaced as well as removing the control arms and everything else to be blasted/replaced/painted.
1. Which leads me to my engine, I would like to rebuild it if I am going this far into the project. What is possible with the 2.5 in terms of very modest power requirements/expectations, like 120-130HP? With the rebuild kit offered by FS 1984 4cyl Rebuild Kit w/pistons, the port matching and a good exhaust is it possible and what are the downsides? Will SD4 parts be the way to accomplish this, if so, which?
2. Which manual would best pair with the above combination?
As I stated, I don't expect nor want high performance. I want my car peppy/spirited and handling well with good reliability/MPG. I do not have the room or time to do a swap and would rather keep the car as close to original as possible.
I'm aware of those, but most are expecting significant gains, which is why I was adamant about modest expectations. I also proposed the SD4 bolt on bits as a way to get these modest gains. I have used the very useful Search function quite a bit before asking questions, some are close but none have been "on the money" related to my questions so I thought best to seek further clarification before drawing any final conclusions.
Yep, read that a few times. The TRW stuff is NLA, was hoping the FS kit would get me close, along with matching the ports, a new exhaust and freshening up every system to like new. The SD4 stuff seems a tad easier to locate than the aforementioned TRW cam and pistons.
I got my 85 2M4 last year, it had been parked for 7 years or so. I have it on the road now and I have no idea what the hp is but it is very fun to drive and its responsive and peppy, I have not had the engine apart but here's what I've done: Removed the throttle body and rebuilt it and cleaned it and drilled out the solder on the fuel pressure regulator so I could turn up the fuel pressure a little. Blocked off the egr. Removed the stock cat and placed a high flow unit on. Replaced the stock coil with a high output accel coil and 8 mm accel wires. Removed the manifold baffle. Replaced the tire with 195/70-14 tires for lighter weight and less rolling resistance. Replaced the fuel pump with a new Bosch pump. Replaced the plugs with Halo plugs from LGS Brisk. Now the car sounds good and is very responsive to the throttle and believe it or not it even pulls decently from 40 mph in fourth gear. I have the Isuzu 5 speed. I also have the timing advance a couple of degrees but can still run regular with no pinging. The car is really fun to run thru the gears.
If it will work I would go with an 87 block, S10 head, grand am intake or I may have it backwards but there are some good threads. If I still had my 88 I was going to the head and intake swap. If you would like I can find the theads and list them.
[This message has been edited by solotwo (edited 03-24-2014).]
The biggest impediment in your plan is that the 84 Duke was not intended for performance. The later engines quite rightly are the better choice.
But, any Duke build to get 35 hp is going to cost more than a swap for a more powerful engine. I built up a 2.8 and it cost me more than my 4.9 swap
The other thing is that the 84 transmission is weak. If you can find an 87 with a 5 speed attached it would be a better starting point, if you really want the 4 cylinder as your preference. Good luck with it. It can be fun to build up an engine, but like the man says, your later model Duke is the better platform for your project.
I just spoke with PO, said the father in law believes the engine was replaced at the dealer in 93'. Where can I find casting marks on the engine? And rod length is the only easy way to determine roller lifters?