Top swap, or motor swap?

[grandprixgtx00]

hey everyone. So...winter project is going to be supercharging my GT. i ordered the ZZP SS M90 kit but still have a few things i need to buy obviously.

question is...my dad can get a used L67 delivered to his shop for around $600 thats with the harness and most of the parts. thats the price range for motors with around 60K on them

i do have someone locally that is interested in buying the SS M90 kit off from me, so i was wondering what your opinion is. would it be easier (and cheaper) to just do a whole motor swap? i have never really talked to anyone that has done this...so im not sure how tough it is. (cant be too tough?)

i know I'm gonna need a PCM, which i will most likely just order one from ZZP since i didnt order one with the M90 kit. Is there anything else that i would need? any input would be greatly appreciated

[GTP Dad]

The best thing to do is to buy a GTP. If you decide to do the swap you will need the following items. Engine, PCM, wiring harness, fuel pump, fuel lines and radiator. The tranny from the GTP along with the axle shafts if also a good idea. It will take a good deal of time to do the swap so I hope you have a garage you can use. If you decide to use the old engine and put the kit on that engine you will need the heads off a GTP along with the lower intake and fuel lines. The fuel pump from a GTP would be a good idea too. Good Luck!

[grandprixgtx00]

Originally Posted by GTP Dad

The best thing to do is to buy a GTP. If you decide to do the swap you will need the following items. Engine, PCM, wiring harness, fuel pump, fuel lines and radiator. The tranny from the GTP along with the axle shafts if also a good idea. It will take a good deal of time to do the swap so I hope you have a garage you can use. If you decide to use the old engine and put the kit on that engine you will need the heads off a GTP along with the lower intake and fuel lines. The fuel pump from a GTP would be a good idea too. Good Luck!

my dad owns an automotive shop, and is an ASE Master certified tech, so a shop wouldnt be a problem. He gave me a hand with the top swap on my SE so i dont forsee it being a problem.

i was not aware that i would need a radiator? could you maybe elaborate on this a bit?

as far as the transmission, it was rebuilt 15K ago, and alot of the parts used were not OE. somewhere down the line i might get the HD axle shaft, but not right away.

[CrazyHorst]

Personally I think you are building a grenade if you intend on keeping the L36 compression ratio and adding positive intake pressure.

Don't get the idea it's gonna blow up when you first turn the key because it won't, but some combination of high altitude, dry hot air, poor fuel or a slug of oil that got ingested under boost is gonna mess up the day. The L67 has been already beaten 6-1/2 ways to Sunday to make sure the package will hold up over time.

[grandprixgtx00]

Originally Posted by CrazyHorst

Personally I think you are building a grenade if you intend on keeping the L36 compression ratio and adding positive intake pressure.

Thanks for the feedback CrazyHorst, however i am very well aware that the L36 has much higher compression than the L67. i have a 1997 SE that i top swapped 2 summers ago, and have put apx 40K miles on it since then. the stock L67 comes with a 3.8" pulley, which i DO NOT run on my SE. i run a 4" pulley and running about 6.5psi.

[GTP Dad]

The GTP and GT radiator are different part numbers. Although I don't know what the exact differences are. You may also want to add a tranny cooler to make sure you don't build up too much head due the the HP increase.

[tblake]

I have heard of horror stories from people doing the ssm90 kit. Run a search. One guy could just not get his car to run no matter what he tried.

I myself for 600 bucks might just swap in the L67. It seems like a pretty reasonable price for the motor and all the wiring. It might be the hardest, but it would be the easiest to add aftermarket onto in the future. Like if you did the ssm90 kit, you would have to only order zzp pullies from then on out as no others would match up to the offset.

[grandprixgtx00]

The GTP and GT radiator are different part numbers. Although I don't know what the exact differences are. You may also want to add a tranny cooler to make sure you don't build up too much head due the the HP increase.

yeah, i was planning on buying an external tranny cooler. I'm not sure the difference between the GT and GTP radiator. i will be sure to do some research.

I have heard of horror stories from people doing the ssm90 kit. Run a search. One guy could just not get his car to run no matter what he tried.

i actually have heard a few horror stories also...this is the reason i am second guessing, and looking for prices of used L67's

I myself for 600 bucks might just swap in the L67. It seems like a pretty reasonable price for the motor and all the wiring. It might be the hardest, but it would be the easiest to add aftermarket onto in the future. Like if you did the ssm90 kit, you would have to only order zzp pullies from then on out as no others would match up to the offset.

i actually thought the motor swap would be easier. in the long run it might be cheaper also. i didnt think i could get a motor that cheap, but had my dad call around. $600 seems like a great deal IMO.

EDIT: btw, $600 includes a 2 year warrenty which is nice

[grandprixgtx00]

Originally Posted by GTP Dad

The GTP and GT radiator are different part numbers. Although I don't know what the exact differences are.

i did some research on this. the GTP radiator is 1" thick, while the GT is 5/8" thick. I am running a 180* T-stat and dont think the thinner radiator should cause any problems

[tblake]

I see your in Wisconsin.....Take a look into external tranny coolers and what can happen to your trans if you run one in a colder climate before you buy one.