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Mark VIII engine questions...

  • Thread starter Thread starter Outlaw97GT
  • Start date Start date Sep 17, 2006

Outlaw97GT

Member
Sep 10, 2005
234
0
16
Redneckville, Tx
Sep 17, 2006
#1
  • Sep 17, 2006
  • #1
A freind of mine has 2 Mark VIII's, his wife wrecked one last year and he got one for a parts car. Well he just bought her a new car and is making me a great deal for both. He has a 96 ( wifes) and a 94 ( parts car, running). The 96 got rearended and runs, it has 73K. The 95 is rough, straight body it has 143K.

Ive been use the search button all day. But I have a few questions.
The engine swap doesnt seem like it would be a big deal, And it looks like using the GT ecm (with tune) and harness is the way to go.


Do they have a forged crank?
Is the flywheel flange a 6 bolt or a 8 bolt?
Are the tranny's the same as the GT's? <----- spare parts....lol
And do you guys think the swap would be worth-while?

Any advice would help, thanks.
 

RedDaemon

10 Year Member
Mar 31, 2005
3,470
9
108
Atlanta, GA
Sep 17, 2006
#2
  • Sep 17, 2006
  • #2
Outlaw97GT said:
A freind of mine has 2 Mark VIII's, his wife wrecked one last year and he got one for a parts car. Well he just bought her a new car and is making me a great deal for both. He has a 96 ( wifes) and a 94 ( parts car, running). The 96 got rearended and runs, it has 73K. The 95 is rough, straight body it has 143K.

Ive been use the search button all day. But I have a few questions.
The engine swap doesnt seem like it would be a big deal, And it looks like using the GT ecm (with tune) and harness is the way to go.


Do they have a forged crank?
Is the flywheel flange a 6 bolt or a 8 bolt?
Are the tranny's the same as the GT's? <----- spare parts....lol
And do you guys think the swap would be worth-while?

Any advice would help, thanks.
Click to expand...

1. prob not (99 cobras didnt come with one [right?])
2. mostl ikely 6...theyre all autos [to my knowledge]
3. trannys are prob different
4. only worth while if u know a guy who can machine it and put some forged rods and pistons in it with a nice cam for a cheap price
 

68torinogt

Hey guys, guess what--I have a bi-pass!!!
Mar 21, 2006
0
0
53
Welcome my son, welcome to the machine
Sep 17, 2006
#3
  • Sep 17, 2006
  • #3
if its the right block it will go to like 1500 hp with new internals another bonous is its aluminium and dohc
 
S

san~man

O-G
Founding Member
Nov 29, 1999
8,546
3
78
A little grass shack on a big lava rock
Sep 17, 2006
#4
  • Sep 17, 2006
  • #4
It's a Teksid block, which is a damn good starting point to build a built block with.
 
P

PioneerCrazed

New Member
Jan 13, 2004
3
0
0
Sep 17, 2006
#5
  • Sep 17, 2006
  • #5
Just stumbled upon this, thinking about grabbing a 96 GT for a pretty good price. Anyways, I've had a 94 Mark for over 2 years now.

1. Cast crank
2. All Mark's were auto's
3. 4R70W
4. I think it'd be worth it if you've got the time and know how. The engine makes my big boat pretty quick, and that's with 3.08 gears in the rear. In a Mustang especially with 4.10 gears, you'd be looking at high 13's pretty easy... And as long as it was taken care of it will a lot longer, I'm about to roll 150k on mine...
 
T

TGJ

New Member
Mar 30, 2005
1,049
4
0
Sep 18, 2006
#6
  • Sep 18, 2006
  • #6
Outlaw97GT said:
Do they have a forged crank?
Click to expand...

No

Outlaw97GT said:
Is the flywheel flange a 6 bolt or a 8 bolt?
Click to expand...

6 bolt

Outlaw97GT said:
Are the tranny's the same as the GT's? <----- spare parts....lol
Click to expand...

They have 4R70Ws, the 94 transmission is junk. I wouldn't use any part out of it. The 96 transmission is better but not much.

Outlaw97GT said:
And do you guys think the swap would be worth-while?
Click to expand...

No, a 99 PI motor will put down the same power as the Mark VIII motor. Guys on the TBird boards have done both of these and the numbers are quite similar between the PI motor swap and Mark VIII motor swap. The 4V swap is more complicated with no gain over the PI motor swap. I would however keep the 4V blocks as those are the Aluminum blocks everybody wants.
 

RedDaemon

10 Year Member
Mar 31, 2005
3,470
9
108
Atlanta, GA
Sep 18, 2006
#7
  • Sep 18, 2006
  • #7
TGJ said:
No, a 99 PI motor will put down the same power as the Mark VIII motor.
Click to expand...

yea..stock for stock.
 

Outlaw97GT

Member
Sep 10, 2005
234
0
16
Redneckville, Tx
Sep 18, 2006
#8
  • Sep 18, 2006
  • #8
He backed out of the deal today. His son wants them to rebuild and make 1 good car.
Its all good.....

Thanks for the reply's
 
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