She's finally mod time for the 91 marquis!

[1990LTD]

well done! I'm actually going to ditch the blue LEDs in my speedometer 'cause I like the look of yours. I never did check to see what the Grand Marquis speedo looked like with regular bulbs instead of LEDs, just did the swap, now I regret it!

[P72Ford]

It looks like you do really nice work, and this is a great build on an EFI car.

But, it looks lazy to me in the vids. I'm not trying to insult you in any way, shape, or form. I suppose it could be that I'm not used to a speedometer with km/hr... but I think there is alot more in your combo, here.

The transmission is definitely holding you back; what are the upgrades you have planned to fix that? With the 4000 rpm shifts, your shift rebound is probably extremely low. If it was shifting at 5500 (or higher), you'd probably rebound in the region where the cam is starting to really shine. I predict large improvements in performance just by raising the shift points. You should also look into a converter, though.

I'll be interested to see how you make out with the higher shift points, etc.

[tjc78]

But, it looks lazy to me in the vids. .

Once it passes 80 KM/h it really starts pulling. Looks to me that it hits 100 (60 mph) in under 8 seconds (starts at 2 sec in vid and crosses 100 at around 10 sec) Sounds great too.

[sly]

once he gets the trans built up (maybe include a higher stall TC)... and the fuel pump upgraded (like he plans on) it's sure to pull even better.

[merc91]

yeh when I hold 1st it pulls harder and harder right up to 5500+ RPM, but when I throw it into D their is to much power for the tranny at them revs to hold and the RPMs just keep screaming up without the tranny holding for the 1-2 shift. If the tranny is cold it will reluctantly grip sometimes and 0-60 mph timed with just holding the 1st shift to 5500RPM drops to 7.2 seconds and 2nd engages in the beginning of the powerband so its like night and day powerwise. But yes I would say the peak powerband of this motor is 2500-5500RPM so it is severely handicapped by the tranny at the moment, and the fuel pressure drops pretty good at WOT. Timed my 0-60 at 7.75 seconds with no passengers and an empty trunk and half tank of gas at 4000RPM shifts... I'm pretty happy with that under the circumstances, but seeing the potential in holding 1st really is pushing me to get the tranny done.

tranny build will include non-lockup 2400 stall, 1 piece input shaft, red alto clutches, Wide ratio gears, and a full manual VB from silverfox with 4th WOT, OD beefing and lots of other things but them are the main ones.

[hemihotrod402]

make sure you let us know how that valvebody and tranny upgrades work, I'm also looking into putting in a SF valvebody when I do that dream 351 swap. lol

[P72Ford]

I think you should consider more converter.

To have a non-lock-up transmission, don't you have to use a 1 piece input shaft?

[merc91]

To have a non-lock-up transmission, don't you have to use a 1 piece input shaft

yup thats on the old mod list.

I just gotta get my old "P" heads repaired (a super small crack in a chamber) then sell them, my 1.7 roller rockers, stang shorty headers, and some other odds and ends then I should have the money in january after workin, for the tranny work.

[merc91]

and this is my daily driver to school and work and that... and i live a half hour outa the city so i'm thinking 2400 stall would be good? I usually am cruising around 30-50mph for most of my A-B type driving.

[johnunit]

Good to see this working right-ish now.

That 100-140 range looks nice and beefy for passing on the highways around here.

[Grand_Marquis_LSS]

Lookin good man.. still want to see this car in person

[merc91]

Lookin good man.. still want to see this car in person

yeh this is starting to get a bit rediculous, if your ever down sarnia way let me know and when i get 2 seconds i'll see if i can take a trip to london. I just gotta see me another merc haha.