Hey everyone,
I recently joined up on the ZPI forum asking some questions, and recieved some pretty good information about what to expect with their Xb. Atleast, the first stages anyway. I hope ZPI doesn't mind me sharing, i know they have a lot to do so i hope they look at this as helping them out instead of putting more pressure on the build.

Anyway, heres the deal thus far:
They xb arrived late due to some unknown errors. The paperwork had been done, and completed but a hold up took place so it was late getting to them. (don't know details) They plan to take out the motor sometime next week, hopefully, to check out everything and see how the 1nz works. They will then start to plan, design and build parts for us.

Some parts out/will be out first:
1. ZPI Pulley - The pulley weighs 1.1lbs and is available now. $135 dollars i believe it is more expensive than the Perrin, however there are no fitment issues like we have all experienced, heard about with Perrin. Also, the ZPI pulley is lighter than the Perrin to give best results in acceleration.
2. ZPI Pistons - These pistons are not out just yet, but will be soon. They have two, one for N/A and one for F/i. The price will be roughly $595.00 for either/or. The N/A compression will be 11:1 where as the F/i will be 8:5:1.
3. ZPI Head Package - Kenny didn't give me any specific details on this part, but i can imagine its going to be worth the price. He told me that this product will hopefully be ready in the up coming weeks. Price is still unknown obviously.

I started this forum to keep everyone updated with their progress, because i know there are others like me just waiting for products to come out from ZPI, and other great companies. Information can be provided on their website, i suggest those who are interested in the company to sign up on there forums, its free obviously and i have found its one of the best ways to keep in touch with them.

Thanks ZPI!

Cya

 

mmm more compression for the N/A....good. Can someone calculates possible hp gains on this......

 

good info!!


ive been watching this also, a gain for na would be sweet as hell if it could be done

 

Thanks, figured a lot of you would like to stay in the know. Since i'm on here all the time and constantly talking to people, i tend to know about parts before they come out on the market. I guess im lucky. heh

Anyway, n/a gains will, and can be done. New head, new pistons, new rod, intake, header, exhaust, hopefully someone can come out with a cam upgrade, someone figure out our crisis with the fuel/ecu management and you'll be set with a good amount of power. Good amount for power to weight, pick up and so on. Buy a light weight crank pulley, if you have a manual short shifter performance clutch, if you have an automatic ATF cooler and bam. I bet all of this would give a n/a 1.5 a good 125-130whp tuned correctly.

I'm tired.

Anyway, as for the estimated whp gains off the pistons. Its kind of hard to make a good estimate as far as gains go. If i had to take a reasonable guess i'd say give or take 10whp. Maybe 15whp. I don't know, its a small motor so i don't know how significant the gains would be on this. However, its a great investment definitely if you plan on putting down power. Its a must.

Cya

 

I would spend the $$ on the pistons alone even if the gain was only 6-10hp. because I would get even more hp out of my car without having to go f/i which I cannot afford in one shot.

I know I could likely save for a while and do it, but just thinking on a simple and easier level.

 

Is the ZPI Pulley Underdriven??

I have yet to get a straight answer to this.

 

No, just lightened.

 

um yeah... a lot of money to spend in hopes that the ecu can keep up and that the motor doesnt blow.....

 

head, pistons and crank pulley shouldn't blow this motor. Its not that weak overall, it just has some very weak points. Mainly ecu/fuel and rod. Which honestly, is typical for a small 4cyl. ECU should be able to keep up with these mods and header, intake exhaust with it. When i had the gs-r, i didn't have to worry about ecu until i broke in the 200whp mark. I had these mods, once i did a cam swap thats when the ecu failed to hold its own. I wouldn't worry about it with these, ZPI or some company should be putting out a ECU re-map or complete swap kit soon hopefully. Theres been lots of talk, and if we keep asking for ZPI to do it they might be the company to push for it. When they were getting their xb, they asked us on the forum what we wanted. Most people said "motor swap", but i don't think thats something they are looking into right now. I'd much rather them fix our existing limit problems and go from there. Thats just me. I know theres a few people out there that would like to see the same thing, i'm sure theres more that i haven't talked to yet.

And no, the ZPI pulley is not underdriven. All it is, is light weight.

Cya

 

Finally a straight answer, Thanx Rubs.

 

something that everyone also seems to overlook is the timing. When you start to boost a motor that wasnt made for it, theres a lot more to worry about than rods. I would love to see what kind of timing people were running when their motors blew. Unfortunately, as we all know piggybacks wont be able to fully resolve a problem like this. I would say that its the timing thats the issue, then the rods, but what do I know

 

Well timing is a big concern, but i feel certain this is something ZPI will take care of. Their care with planning their products are something most major companies tend to overlook, which is one reason why i'd go with ZPI over another. Of course, this is generally speaking. HKS does an amazing job delivering products and product help with fuel, timing, everything. Companies like Greddy, however, tend to overlook details. Not always, but they do slip more than others i've discovered. Nothing too major per se, but can be costly for fixes and repairs if not taken care of.

With this said, this is in part why i don't discuss timing when i talk about ZPI. However, if they do overlook it they will be attacked with concern. I'm sure they will do just fine.

But speaking in terms of n/a and f/i, rods, fuel/map/ecu is my major concerns with any company. I hope ZPI understands this flaw with the 1nz, its a weak and cheap motor from the factory. And in order to put out some very respectable numbers, and high numbers (not talking about 300whp) then these things are a must as far as the check list.

Good post though, a lot of people do tend to forget about timing.

You know my friend, you know.

Cya

 

*sigh*


They need to be developing some type of swap rather than parts IMO.

 

cant you do swaps now?? I know some have already done swaps on this site..though I dont know much more than that lol

 

exactly!!!!

 

What exactly is it you want? A 1zz is a direct bolt up with motor mounts, and should be minimal to virtually no modifications to install it. The 2zz you would have to change some motor mounts (i believe) and a few other things, but thats a swap thats not even worth it. A 1zz is worth it and more of a practical, logical swap. It can be done already, so theres nothing ZPI would need to deliver for it. Except parts, but theres already a good amount of aftermarket for it.

Just my thoughts.

Cya

 

the 1zz cannot use stock motor mounts and the tranny's will not intermingle.

 

i thought it would, oh well. that explains why there are no kits available, like we talked about it would be expensive. at least, thats where my knowledge leads me to believe. it may be semi-cheap, but to build the 1nz would be cheaper than a motor swap than build, although it may give you more whp its not something everyone wants to go with. who knows, i think building the 1nz is fine. thats what i've been doing, and will continue to do so.

cya

 

I know some folks hoping to get the 4age 20v swap complete and boltable by summer (roughly). That means you can buy the kit or parts of the kit to drop in your xB. Problem is your gonna be running older JDM equipment. 20v with quad throttle bodies and a nice turbo with equal length runners off to the side by the battery should be sexy. Should EASILLY make 250hp. Thats my plans in the next year or so. This is of course with a standalone and complete swap, including tranny. Sure, Ill only be able to go 150mph but thats plenty in a box.

 

20v. lol. hello no smogability in cali ever. it's jdm only meaning it has no ports in the head for egr... lame.