just something i've been wondering. i see the awesome turbo and sc stuff tc owners are getting and wonder why not the xa or xb? i'm mainly wondering what are the technical problems tuners are having or is it just a lack of interest? is 200 hp on an xa that far fetched?

 

The 2.4 liter in the tC is a much more stout engine from the factory. The 1NZ is a good little motor but under boost, the rod angle contributes to rod failure if you boost the motor pretty much over 10 psi, limiting power making.

Right now, the only way an xA or xB will make big power is through the 4efte swap, something I would consider down the line.

 

It is a 1.5L motor. I would contribute it more to lack of interest, which is dumb considering how simple the 1NZ is. If someone would make some cams, high comp pistons, and a fuel computer that plugs in, I might be on board to do some actual motor work. But unti there is a REAL plug and play computer with anti-knock, VVTi support, and OBDII compatibility, I say nay. There is nothing worse than hacking up the wires on your 1-2 year old car, then not having the ability to tune it perfectly, and then not be able to get it inspected. If someone is listening out there, make a plug and play box with all those features. I have a feeling with as light as the xA/xB are, with a good solid 150whp, they would be quite quick.

 

the problem is two things

1 . learning ecu. doesnt like mods or piggy backs.
2 . 15% offset crank. which honestly isn't too much of a problem. the major one is the ecu.

 

i always thought 150 whp would be beast on the xa. i won't spend any money on intakes or anything like that since it seems the performance gains are minimal. i'd consider a motor swap but they are usually a pain and from what i've read i'd have to go with an older toyota motor and i'd rather keep my stock low mileage motor anyway. so i guess the only option is to wait for a serious turbo or sc kit to hit the market.

 

there will NEVER be one. it will be totally custom and one off if anything. add bolt ones. trust it isnt a waste and if yer smart will be cheap...

and just wait for 1zz/2zz swap kits within the next few short years

 

if boltons could make the power i'd like, i'd do it, but i don't see that happening so i'll just chill. i'm sure they make the car a little peppier but they aren't going to give me the result i'd like.

maybe a motor swap one day. it would probably be cheaper and more reliable than a custom turbo anyways.

what are the specs on the engines you're telling me about? how old, displacement, na or fi, what cars were they in, etc.? i don't know much about toyota engines so the engine codes don't really tell me anything.

 

no offense but th xB and xA are more show than go. i could somewhat understand if they made a sc for the xA but the xB is not high speed friendly. Here is an example. The origanal shelby cobra was a great car and could kick a$$ and take names but later the car ran into a bottleneck. Aerodynmanicly the car hit a brick wall at 160-165 mph. It obviously had the hp but the body wouldn't alow the car to go any faster. So you could could have sc tc motor in the xB it wouldn't help that much Also, the xB trans has very high gearing. Good idea but bad car to work with.

 

i agree but i'm not trying to break speed records. i think all scions are sharp in their own way, but the xa and xb are the slow pokes and a little more punch would make them wicked fun to drive.

 

define "real power" though, how much power do you need to make a quick car on something so light

i would think 130-140hp on an xb or xa is pretty darn quick and peppy...and people are doing that now, not sure of xa's but ive seen some on this site alone who can hit 125-135hp

125+ hp on these light small cars is a good chunk of power i think

i wonder how much you can try just making the cars even lighter, with these it may become something where every tiny bit adds up like carbon fiber items here and there, no spare tire ...no back seats etc.... can add up

 

i want 200 hp. i know that's high but it's not a ridiculous number. tc's are making 220 or more at the wheels so 160 whp on a xa shouldn't be viewed as an impossible goal. though what i want vs what i can have might be different.

 

but remember the 1.5 liter motor the xA has was made for high fuel milage not for preformace so you may be pushingit on that motor. The compression ratio is high which isn't that good for SC. I understand what you are saying. The xA is 2300 pounds. that is 200 pounds lighter than a civic coupe. Although toyota wanted the scion to be modified the 1.5 liter motor gearing it to high. If you were to some how transplate the tc gearset into the xA and then SC maybe just maybe you could get a quick little car for what you are asking for

 

As it is right now, someone has 150whp on a 1nz motor, i believe in a Xb. I forget who it was, but they are on here.

The 1/4 isn't the Xb's strong side, however, autocross and road courses are. With a few suspension mods the Xb can handle very strong, and out handle a lot of things. I know, i autox and so on. So with the xa/xb, don't tune for 1/4 mile runs. No matter what you do, you won't the fastest time.

160whp isn't impossible. However, as it stands right now lots of parts would have to be custom, you would have to go with a turbocharger or supercharger. Turbo being more effient, with that much power in this car i would recommend it vs. super. You are looking at spending anywhere from $6,000-$10,000 to get 160whp as safe, and durable as possible.

120-130whp is all we need to be very quick. We are light cars, and yes, weight reduction helps a lot. I have an automatic with mods listed in sig, and i took out back seat, spare tire, jacks, back seat brackets.. And ran 16.4 in the 1/4. Thats my fastest time, with weight reduction i averaged 16.5-16.7 1/4. Makes a difference.

Good luck,
Cya

 

who said we were going for topend? top end doesnt help much. it isn't too useable. and i know an xb could go like 140 or so aerodynamically.

 

you can get 115whp on boltons. a vast improvement. but you do what you do.

the 1zz is a 1.8 liter with 130-140hp it is in corolla's , mr-2's , celica gt , and matrix's

the 2zz is the 1.8 higher comp vvtLi motor 173-180hp corolla xrs , matrix xrs , celica gts , modified for use in lotus elise with 190hp.

they were first sold in like 2000 or so and are still sold to this day and will be in use for at least 2 more years.

the 1zz can be had with a trd supercharger which bone stock will produce 163whp which is the same as the 2zz yet will cost less , be more abundant and have SOOO much more torque. add header , an intake , and full exhaust coupled with iridiums , lightweight pulley and hell you could even up the boost. but with stock boost plus bolt ons you're looking at about 180-200 whp.

and with the 1zz you dont have to worry about bending valves from an accidental miss-shift like you do in the 2zz

 

killerxromances know what he talkin about. If all you want is a quick town car then mod your suspention then begin with the power mods. Here is another example of this. The Abrams m1a2 has a top speed of 55 mph (i know that is so fast) and it has a 1500 hp engine. Englands tank is light and has a smaller engine but can go just as fast if not fast because of it better suspention and lighter weight.

 

good points all around. for now i'm not doing much to the suspension. eventually i'll go with some coilovers but not until i have the power to warrant making an investment like that. as of right now i'm enjoying the car for what it is, which is a nice little ride that gets great mileage and looks great.

i'm not looking for 1/4 mile or autocross, just something i can take on the road and enjoy. i'll have to start doing some homework on the 1zz. once i see someone else do it and figure out what problems are, i'll throw my hat in and see what happens.

 

what is the service weight difference going to be on a 1ZZ motor and trans VS a 1NZ? If they are roughly the same it wouldn't change the weight a lot and the car's handling dynamics wouldn't change much. I think the 1NZ is 190 pounds dry....

 

it wont be much more than 75 pounds.

 

I'm not really too big on power really...not say that power isn't damn rad. but i've come to terms with my little monster 1.5L engine...as long as I can make it quicker...not faster, but quicker...I'll be happy!! The thing that I care most about and most certainly REALLy do something about is the car's suspension set up. As alot of you may or may not know I like to run alot of mountain roads, and IMO 3/4 of what really matters is suspension set-up. the rest power. Whatever gains I can get from I/H/E a better clutch, flywheel, and lighter pulley, is fine enough for me!!