This is not a bash on either option but rather some observations,first off which kit will produce more power? with equal pulley sizes the Ass kit will produce more HP ,why your starting with a ported LIM and ported blower and by chance or not this design moves the injectors about 3/4 of an inch farther away from the intake valves which by all accounts gives better fuel /air atomization,now the cons the pulley system is adequite but not nearly as good as the stock L-67 setup,now as far as the top swap I would recommend this to anyone with higher mileage it would be a good time to get your heads freshened up and possibly ported and you would get a chance to look at the condition of your cyl. walls,if you plan on doing a cam at the same time I would say pull your motor and do a top swap a cam swap in the car is not that easy and you can freshen all gaskets when you have your motor pulled,like I said tyhis is not a bash or prop for either side but just some thoughts to ponder for people contemplating going FI .Chico.

Good info.

Wasn't there some complaints about the Ass kit availability?

yes

Chico- depending on how you do it. Porting the blower and LIM is not too difficult to do, i did it myself. Granted the installation seems easier with the Ass kit (i.e. instructions, CD) which is a very good thing. The Top-End swap has no instructions. But I liked having the piece of mind of having new head gaskets, valves, springs, retainers, etc. which make 1.9's or a cam much easier for the future. (Changing springs and retainers in the car is no fun, people who have done it both ways will agree) I think there are pros and cons to both ways, but it all came down to the fact that ZZP was constantly out of stock with their fuel logs.

Price for the ZZP ss kit
Install kit- $200
Fuel Logs- $380
Blower Porting- $200 + $400 core charge
Machined Intake- $175 + $100 core charge

Total- $955 + $500 in core charges. So depending on if you can get your hands on the M90 and LIM, it could be close to $1500.

Price for the Top-Swap:
Ed Morad's entire kit: $725
All gaskets- $225

Total- $1000

No core charges. Also, you dont have to pay shipping for the Blower and LIM back and forth from ZZP.

ordonez, got any info on the porting? I've got the M90 and lower intake sitting in my room right now, and porting them with my dremel would be great. Plus, with this cold spell I'm not getting back to the engine for almost a week.

i didnt port the inlet, but for the outlet, i just used the pic from ZZP's website and a few local members pics and used a dremel on it! Took some time, but it was rather easy

I couldn't agree more. I have 146k on my short block and when I pulled off my heads, the cylinder walls were absolutely perfect. no ridges or anything, but they could've been much worse and I was glad to know they were good for sure. I also had my new heads decked and cleaned, although I left them stock. The cam install took me all of 30 minutes give or take with the motor out of the car, pulling the motor (and putting it back in) is definitely a chore but it made the whole job much much easier, and also torquing the head bolts/rocker bolts etc is much easier on a stand.

I did the same thing. Take your time but use pics for a reference and have at it. Beats shipping back and forth and paying out the butt for it!

Just to add to the vs., what about a total engine swap? Pros/cons in comparison to a top end or M90 kit?

Have to swap the tranny too, and in most cases (I think) the wiring harness and PCM as well. The GT PCM cannot control the GTP motor or tranny since it's the 4T65e-HD. Definitely doable but I think it would be more of a PITA. Plus you're stuck with those crappy 2.93 gears :rolleyes:

I rode in a GTP the other day with a 3.4" and supporting mods... and the crappiness of the gearing blew my mind. I thought it would be so much faster than it was. It was definitely a fast car but I honestly believe my car would have no problem keeping up, even with the stock 3.8" pulley.

Yeah 3.29 gearing all the way! Screw 3.69 though.

Well a stock L-67 puts down about 195whp and a M-90 kit with a 4" pulley puts down 250whp so you decide ,the higher comp. of the L-36 block will make around 50hp over the L-67 block.Chico.

Compression!!! 9.4.1! You dont get that with an L67!

The M90 isn't the most efficient supercharger out there due to the heat it generates. The added compression is like dropping some pulley sizes without the additional heat. It's one of the reasons I've pretty much decided on getting my heads cleaned and probably around .010" knocked off the bottom. Resurfaces and bumps up compression a bit.

so if you do a ass kit from zzp what size pulleys should you do and what heads would be the best

depends on the mods with the car. I would start with a 4.0 or 4.2 with a near stock car