mark VIII 4V swap to a sohc gt??

fast97gt

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Jan 2, 2007

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#1

• Mar 23, 2008

• #1

ive found a steel on a lincoln mark 8 4v car. my question is what all will i be facing on this swap, and is it worth it, and what all do i need? i can get the whole car and its a 1995 lincoln. any advice is welcome thanks to all. oh i can get the whole shoot'n'match for less the a 1000 bucks, and ive already herd it run and drove it.

 

RedDaemon

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Mar 31, 2005

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Mar 23, 2008

#2

• Mar 23, 2008

• #2

fast97gt said:

oh i can get the whole shoot'n'match for less the a 1000 bucks, and ive already herd it run and drove it.

Click to expand...

does that mean youre getting the whole car or just the engine + harness?

if you mean whole car, i dont see why you wouldnt have everything required. unless something doesnt work on the mark viii..

 

fast97gt

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#3

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yea im gettin the whole car. and im using the t45 thats in my gt for now if i proceed with the project. oh and is the mark 8 bottom end forged?

 

fast97gt

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#4

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-=NightHawk=- said:

does that mean youre getting the whole car or just the engine + harness?

if you mean whole car, i dont see why you wouldnt have everything required. unless something doesnt work on the mark viii..

Click to expand...

wouldnt i have to buy the cobra upper and lower plenum off a newer 96 to 98 cobra?

 

joshjwc9

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Jun 12, 2006

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Mar 23, 2008

#5

• Mar 23, 2008

• #5

fast97gt said:

yea im gettin the whole car. and im using the t45 thats in my gt for now if i proceed with the project. oh and is the mark 8 bottom end forged?

Click to expand...

I believe that it isn't it has the same heads as the 96-98 Cobra with an aluminum block I think...

 

billfisher

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Mar 23, 2008

#6

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the block is exactly the same as a cobra. the crank is a six bolt cast piece. same rods and pistons as a cobra. same heads with smaller cams. the intake on a 93-95 out torques the cobra intake, but the cobra intake is better in every other way.


imrc controls for the cobra has a controller your pcm will not control. 95 pcm's are hybrid EEC-iv.


my advice.... use your pcm, get it tuned and get cobra cams and intake. you will find it is slower than equal bolt-on 99+ gt until you add cams and 4.30 gears.

then the cobra-esk mill will shine.

our club has a bolt-on 4.30 geared 97 that runs 13.3 in the quarter. just a little slower than an equal bolt-on 05+ GT. and that was her first time trying the 1/4 mile.

 

billfisher

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#7

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i believe the top HP using the stock 95 Mark Viii intake is 350rwhp STD correction.

 

billfisher

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Mar 23, 2008

#8

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i decided against the mark viii i have in favor of 3 valve heads because of torque.
that 97 gt has 279rwhp/279rwtq. compare that to a bolt-on 05+ 3v with 300rwhp/310rwtq. the 93-98 B heads just don't torque.

 

fast97gt

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Mar 23, 2008

#9

• Mar 23, 2008

• #9

so what about gettin some P.I. stuff and slappin it on the the mark viii block. billfisher you are sayin that the block is the same. and the rods and pistons are forged with a steel crank, etc.?

 

B

bdcardinal

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Jun 10, 2003

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Mar 23, 2008

#10

• Mar 23, 2008

• #10

rods and piston are not forged. pistons re hypereutectic and the rods are the same cracked powered metal rods. the heads are the same as cobra head, cams are different.

watch out though as some of the rebuild components for the earlier teksid blocks are obsolete.

 

billfisher

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Mar 23, 2008

#11

• Mar 23, 2008

• #11

cobras did not have forged pistons or rods, but the rods are superior to 2v.

forged 8 bolt crank for the cobra.

 

billfisher

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Jul 17, 2005

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huntsville, AL

Mar 23, 2008

#12

• Mar 23, 2008

• #12

putting PI stuff is ok. overall it will be a beter motor than mark VIII, unless you really get into the motor. heads,cams, longtubes, etc.


if you can wait and aquire items the real hot setup is cleaned up, 3 angled 04-05 4v heads, lincoln aviator intake, bolt-ons. nothing is superior to that. use your short block and 04+ 4v components. forgings are for power adders over 500whp.
your mark viii crank rods, and pistons will live to 7000 rpm.

 

billfisher

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Mar 23, 2008

#13

• Mar 23, 2008

• #13

btw 4v pistons are different dish. you need pi pistons if you switch to PI.