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post #1 of 14 (permalink) Old 10-03-2006, 02:14 AM Thread Starter
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Choice for New Engine

So next summer once I have some more cash I wanna dump some g's into the car. With 160,xxx almost at this point, modding the engine seems like a waste. Now I wanna just buy a new engine. Would it be better to get a Mark 8 DOHC engine, or a PI engine? Now a difference of a thousand dollars isn't the issue, I'm looking for best performance and what can be modded more easily.

96' 4.6l LX Sport - Modding put on hold for awhile
91' Chevy 1500 - Can't wait for the 383 Stroker
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post #2 of 14 (permalink) Old 10-03-2006, 02:23 AM
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i would like to see someone drop in a 3V motor theres actually alot of good ones circulating around because of 05-06 GT owners swaping the 3Vs out for the DOHC there performance is close to a DOHC and they are a very efficient setup...you would get great gas milage with the VVT!!
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post #3 of 14 (permalink) Old 10-03-2006, 03:13 AM
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I have no idea if the VVT is even an option with our factory EEC's, it would probably require a total harness hack job. The 3v head isn't bad, but I would not want that thing for any application that would see boost, that one exhaust valve is poised to go up in smoke.

I would say that no matter what head you go with, a big bore block is the way to go. Obviously, 32v has the most potential, but eventually any head work will cost a small fortune with all those valves, runners, retainers, cams, and springs. But, which is the best really depends on how much you'd ultimately like to spend and what your goals are, since the best totally depends on what you're looking for.

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post #4 of 14 (permalink) Old 10-03-2006, 04:01 AM
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VVT is variable valve timing it rotates the cam profile a few degrees to help promote minimal valve overlap for great torque and open up the overlap for better higher rpm power..they do respond to boost just fine but the stock computer system on the new GTS is very sensitive and it would be better ran with an aftermarket programable ECM. just and i dea Im sure someone will do the swap in these cars someday if they havent already?

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post #5 of 14 (permalink) Old 10-03-2006, 06:20 PM
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There is no way to adapt the 3V motor to the MN12 EEC and use the VVT from the 3V motor. Fitting the 3V motor under a hood on the MN12 is no easy task either, I seriously doubt it will fit under the aftermarket hoods available. This is due to the front air entry on the intake Manifold from the 3V motor.

Personally, I would get the Mark VIII motor, do a Big-Bore to it. Choose either a good set of ported 2V heads or good 4V heads( 99 +4V or FRPP 4V heads ). But what do I know...

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post #6 of 14 (permalink) Old 10-03-2006, 07:15 PM
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I'd go with a BB DOHC as well if you can afford it.


Quote:
Originally Posted by twin turbo 281
custom low budget twin turbo 281 with comp cams and many other bolt ons!
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post #7 of 14 (permalink) Old 10-03-2006, 07:40 PM
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If money is tight, an aluminum '02+ Explorer engine would be good. Throw a set of P and P'd heads and some cams (VT, Comp, SHM....).

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post #8 of 14 (permalink) Old 10-04-2006, 01:03 AM
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02 exploder.....and cam it. Crower 2 is a good choice.




"Booyah". Stu Scott.
1996 Braincoated, all Aluminum PI powered and obscenely loud Pearl White Tbird [email protected] AKA Dyrdek.
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post #9 of 14 (permalink) Old 10-04-2006, 12:27 PM
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If you have the money, the late 90's cobra motor would be awsome. It has a great built bottem end, heads are good and the rpm limit can be cranked up to 7,000rpm. Those motors at 7,000rpm sound sooo awsome.

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post #10 of 14 (permalink) Old 10-04-2006, 12:28 PM
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Quote:
Originally Posted by David_viny
If you have the money, the late 90's cobra motor would be awsome. It has a great built bottem end, heads are good and the rpm limit can be cranked up to 7,000rpm. Those motors at 7,000rpm sound sooo awsome.
too bad that arent that fast.




"Booyah". Stu Scott.
1996 Braincoated, all Aluminum PI powered and obscenely loud Pearl White Tbird [email protected] AKA Dyrdek.
2013 Black on black FX2 Supercrew Ecoboost F150. Roll onto the scene with the ceiling missing.
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post #11 of 14 (permalink) Old 10-04-2006, 02:05 PM
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the aluminum 4.6 motors are getting tougher to find guys.

They aren't making em anymore

When there was a ton of smashed suv's that motor used to be 900 bucks.

Not any more
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post #12 of 14 (permalink) Old 10-04-2006, 08:48 PM
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Quote:
Originally Posted by The Great Obucina
too bad that arent that fast.
Faster then a PI

1995 T-bird 4.6l - Eibach lowering springs, Cobra R hood, One 12" sub woofer, Alpine type-R front speakers. 16.249 @85.11mph 1/4 mile
2001 Pontiac Trans Am WS6 - Cam, headers, HPtuned by me.
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post #13 of 14 (permalink) Old 10-05-2006, 12:15 AM
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Quote:
Originally Posted by David_viny
Faster then a PI
the car in the left lane was just over 3 tenths quicker and 500 lbs lighter than me on my only run with the PI. Joe wasnt impressed. For our cars, they really seem to need short gears and a high stall to really take advantage of the lack of torque the 4v exhibits down low.




"Booyah". Stu Scott.
1996 Braincoated, all Aluminum PI powered and obscenely loud Pearl White Tbird [email protected] AKA Dyrdek.
2013 Black on black FX2 Supercrew Ecoboost F150. Roll onto the scene with the ceiling missing.
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post #14 of 14 (permalink) Old 10-05-2006, 02:12 AM Thread Starter
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What kind of numbers can one see from a cammed 02 exploder engine?

96' 4.6l LX Sport - Modding put on hold for awhile
91' Chevy 1500 - Can't wait for the 383 Stroker
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