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Old 04-08-2010, 10:19 PM   #31
masterofthepuppets99
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so if im planning on a cobra intake anyway it doesnt matter. are there any differences between the 93-98 mark heads and the 96-98 cobra heads?
the 97-98 MK VIII heads are the same castings as 96-98 cobras. the MK VIII from 93-96....i dunno. 93-96s also have a different intake manifold than the 97-98s, which i have heard flows more (not as much as 96-98 cobras). the 93-96s did not have beehive valve springs although the heads themselves may have been the same, not sure on that.
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Old 04-09-2010, 02:40 AM   #32
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Originally Posted by GTRACER88 View Post
Is this a sticky yet??? Awesome write up!
Not yet, but it gets plenty of exposure. Thanks for the compliment.

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so if im planning on a cobra intake anyway it doesnt matter. are there any differences between the 93-98 mark heads and the 96-98 cobra heads?
Nope, not really. The 93-96 heads have shrouded valves, the 97-98 and the Cobra heads don't. The intake cam is slightly different on the Mark VIII as well. Lemme see if I can find the comparison pics of the shrouded and unshrouded valves.
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Old 04-18-2010, 03:31 PM   #33
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could you please take pictures of what all your coolant hoses look like thats running from the radiator and etc i am in the middle of this swap and i have no clue how there susspose to be ran
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Old 05-06-2010, 12:24 AM   #34
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CRAP! Sorry that I missed your post man, I normally don't. If you still need them, I will get them ASAP.

I helped another guy out with a swap and he gave me the results of a dyno pull.

All motor, GT tune, nothing but a bassani ORX and flowmaster catback.

276HP@3800RPM
288ftlbs of torque@3500RPM.

I was shocked to say the least. Not only at the RPM's, but the power to the wheels.
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Old 05-06-2010, 12:39 AM   #35
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Do you know how many miles these engines are good for? I currently have 112k on my 96 GT, and the Mark VIII engine I found has 110k.
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Old 05-06-2010, 02:24 AM   #36
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I had one with 196K miles on the original engine and it was still going strong. I have seen Mark VIII's go 300K without a rebuild.
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Old 07-09-2010, 12:08 PM   #37
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any updates as far as numbers on the track or dyno? im gonna get serious about this swap now. i want the aluminum block and 4v potential for a 500hp max street monster .
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Old 07-10-2010, 10:38 PM   #38
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any updates as far as numbers on the track or dyno? im gonna get serious about this swap now. i want the aluminum block and 4v potential for a 500hp max street monster .
On mine no, but I helped a guy do this same swap. The only difference between him and me is that he has an ORX and flowmasters. He made 276/288 to the wheels. He ran a 15.1, but he was on 2.73 gears, which are crap for a 4V.
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Old 07-11-2010, 03:49 AM   #39
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so a factory 96-98 MK VIII engine with a high flow mid pipe laid down 276hp/288tq. NICE! i wonder what im gonna be puttin out when i get mine dynoed
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Old 07-11-2010, 05:01 AM   #40
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so a factory 96-98 MK VIII engine with a high flow mid pipe laid down 276hp/288tq. NICE! i wonder what im gonna be puttin out when i get mine dynoed
Yep. It was a completely stock 97 Mark VIII engine with an EGR delete. Stock GT tune, Bassani ORX, and flowmaster super 44's. I ran a 2010 Camaro SS automatic on an empty highway and BARELY lost. I mean, my fender was at his door and that was with non 4V friendly 3.27 gears.
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Old 07-11-2010, 05:01 AM
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