Maybe at most better throttle response, otherwise your adding higher flowing items to an enine that can't flow that much air anyway, with more drastic mods (heads/cams/intake) they will help a bit more. The tune alone will make a much much more noticable change than the "upper engine bling" will.
Let alone an engine swap? Engine swap is a whole lot easier trhan head/intake swap. That is unless you can just bend over into the engine bay for several hours at a time. It's just as easy to pull the motor out of the car to do a PI swap. Take it from someone who has done a PI swap. Just get a whole explorer engine. It will end up costing just as much to swap everything, and I bought used heads and intake.
A headswap is pretty involved, however a PI intake swap is quite easy, and will give you noticable gains, certainly more than changing out your plenum and TB. I would spend the money on PI intake, and cams if you are feeling ambitious, and a tune, and that should get you a noticeable power gain.
A tune won't make a difference with a bigger throttle body or not. The MAF sensor will read any additional air if there is any, and the computer will adjust accordingly. Like it was stated above, the tune alone will make a drastic difference.
I bought a 97 Mark VIII engine with 68k miles for $500.
One that is perfect at that mileage will be ~$1000... Mine required some serious cleaning internally, as well as other stuff.
There are some great deals on same year model direct swap stuff, but expect to pay more for new stuff. Any modular motor over 10 years old needs new valve stem seals at a minimum; other seals are easier to replace while it's out...
Mercury Gran Marquis long blocks are a fairly straight swap, with 96/97 intake and fuel rails and stuff. Almost the same as stock. I've seen these for $800 with low mileage.
IMHO, The totally awesome JY find would be a Lincoln Aviator DOHC engine for cheap; Aluminum block, and C heads with more mellow intake and cams. No, it wont fit under a stock hood. I haven't seen anyone swap one of these yet.
First I want to say just about everything I’ve fixed so far on our new-to-us T-Bird cane from suggestions, and past posts here. This site has been a huge help! I did read a lot of old posts regarding the code I’m having, but nothing seems to have a solution, nor my exact symptoms..
Since day 1...
Hey guys, it has been quite a while but it's good to be back!
I am in need of some guidance regarding a recent engine swap in my 97 bird.
The back story:
It has been quite a while since I have posted, mostly due to the fact that my motor exploded roughly 6 years ago. Since then the car has...
I've been screwing around with this all day. Short of removing the cam, is there any way to get to the lower head bolts on this car? My socket wrench (all 4 that I've tried) is obstructed by the shock tower. I had a hell of a time removing one of the valve cover bolts on the bottom, but...
Hey guys; I've been posting in a few threads talking about the various mods for our cars, and I thought I'd start a thread where we could pull a bunch or the info together, and link to the various Howto threads.
So, in our best free-for-all fashion, lets discuss the various mods, and kick...
07-25-2005 Post removed due to off topic chest pounding!
This thread was about a 5.4L DOHC installation that another member was planning to develop as a kit for the Thunderbird. Due to the overwhelming bashing by Jerry's crew the kit was canceled.
Why do you ask this happened. The story...
A forum community dedicated to Ford Thunderbird, Mercury Cougar and Lincoln Mark owners and enthusiasts. Come join the discussion about performance, modifications, troubleshooting, maintenance, and more!