New thoughts on my build, new parts are here....Holset question!!!

[KEMP]

so as some of you know i melted my head and ill be using a 4port head now. i got my stage3 AEM Meth kit(boost dependant) and a bigger fmic.

i can get a Holset HX52 for very cheap, and was wondering what you guys think about that turbo on the CA, i know its not gonna spool very quick but im reving to 9k so i have a little room to spare.

What do you guys think about that turbo on my car, and wht do you think would be an ideal holset turbo for my car if you dont agree with the hx52 idea.

Thank you

[ca18detgabby]

I would think anything bigger than a HX35 is over kill for most CAs, but that just me.

[Frankenfourty]

I picked up a H1C for my newly acquired build. I personally would go with a little smaller turbo. Holsets are great turbos. I would just suggest going a little smaller, even with an H1C. The only defense I have for getting a bigger turbo like that is that you can get the same volume of air on less boost. Therefore you can get essentially the same power while putting your engine under less stress. Granted, there are some drawbacks as far as lag goes but there are some "tricks" you can do to increase response time. But even given that, the hx52 is too big. If you really want to run an hx52 then go for it, but I really think you would be much happier with a smaller holset.

And before I make a suggestion on which model specifically to recommend, can you give some more info as far as your power goals, where you want your power band, etc.

[float_6969]

Even at 9K, you're gonna have a tough time with that HX52. It'll spool, but from looking at the few cars running it, you're not gonna spool till around 7K on a stock displacement CA18. Even if you bored it out to 89mm and made it a 1.9L, you're still gonna have trouble spooling it.

I'd run an HX40. It'll still be a little laggy (4-5K), but should support your 9K RPM redline and still be pretty streetable.

[fabio240]

HY35 OR HX35 thats what Im looking at after I get tired of my big 16g....

[Reno]

if i ever go CA id use a holset he351ve that i have in my garage waiting to be put on my KA, spools like a t25 but flows 67 lbs/min (gt40) if done properly

[bentvalves]

id be looking at something from there new lineup along the lines of a T50R. T25 turbine housing, v - band outlet on compressor housing, internal wastegate; but an actuator right out of the box that will allow no less the 2.1 bar boost pressure.

the price is the drawback. Look into it a bit moe and also look into what holset recommends for manifold diameter to spool their turbines where they shine

[KEMP]

welll my power goals are a little more to have a t25 housed turbo.

im lookin for ATLEAST 450whp, and that is what i will be satsifid with.

ive been lookin at like t70's and stuff, but im most likely not doing the hx52.

i'm thinking more along the lines of something that can spool by5k, and still hold power all the way to 9k red line.

more thoughts nad turbo suggestions please.

FYI im used to the spool of a 50trim with a .63 hotside... so im not to pressed on having quick spool.

[KEMP]

http://cgi.ebay.com/ebaymotors...ories

this seems like a good turbo, i would mostlikely use my external wastegate, and use the t4 to t3 adapter, so the turbo would raise up about an inch to help clear the shock tower and brake master.

[Reno]

that loks like a counterfit holset....

more info here...

http://www.youtube.com/watch?v=Za0DieZHMKc

[Frankenfourty]

An H1C would get you to your power goals and then some. Otherwise you could go HX40. Either of those will suit you needs. I think the HX series might be a bit more efficient though (I don't remember for sure).

[float_6969]

A real HX40 is a T3 flange.

eGhey turbo's are crap. Stay away.

I think the HX40 is more efficient.

[bentvalves]

what are you doing for a manifold? depending on if the holset you get is from their new lineup, you really need to look into manifold diameter.

what are you doing with injectors for this power goal and what ECU?

Greg

[dash]

Quote »FYI im used to the spool of a 50trim with a .63 hotside[/quote]50 trim t3/t4 is a classic, and still one of the best performing 1.8L turbos to date.Has hit a record 585hp on a sick street miata 1.8L! Why would u wanna get rid of it when u haven't even touched anywhere near its limits ?

Quote »eGhey turbo's are crap. Stay away[/quote]seen too many 1st rate CA18 performances to say that - dyno & ETs.Paid a hundred bucks for a ebay t3/t4 recently dyno'd 300 atw on a "wounded" rb25 (one bad cylinder). Hit 20psi almost instantly, tire smoke 1st 3 gears. No play, no leaks.

Two of club4ag record setting corollas use $250 chinese turbos

[boost_boy]

50 trim t3/t4 is a classic, and still one of the best performing 1.8L turbos to date.Has hit a record 585hp on a sick street miata 1.8L!

I'll agree that a T3/T4 is still a good turbo for most daily bangers, but referencing a 585hp "sick street miata" just doesn't prove much here unless you're the builder and can prove exactly what's been done to the car in detail to support your case.

Why would u wanna get rid of it when u haven't even touched anywhere near its limits ?

I agree again. If the OP hasn't pushed the turbo to it's limits because he keeps tearing-up engines, then he shouldn't be so quick to change turbochargers. But then again, it his choice and he's going to do whatever it is he wants to do, regardless of our opinions.

Two of club4ag record setting corollas use $250 chinese turbos

Maybe so, but I'm pretty sure the tuning was done by someone who knew what they were doing and the turbo did what it needs to do as well. But CA guys are cheap which is one of the reasons why most purchase this motor. To them it is a cheap, entry level turbo platform. But to me, it's a venerable 110 CID monster that has proven to bigger and stronger than what it appears to be. Luckily for me, I have the recipe to have a reliable, internally stcok CA18DET, that's capable of handling 400hp abuse all day in and all day out (I drive one everyday to work). It's not rocket science. You can make any engine produce good power, but size will limit their peak output and squeezing massive power out of a 4AG series engine is more of a challenge than the Toyota boys swapping in a CA18DET and attempting the same feat as we have seen them do time and time again which says alot about the CA18DET. Again, preference rules this topic. But if you have no real experiences with any of these motors, then you're in for a lot of heartaches and money losses.

Dee

[bentvalves]

welll my power goals are a little more to have a t25 housed turbo.

im lookin for ATLEAST 450whp, and that is what i will be satsifid with.

ive been lookin at like t70's and stuff, but im most likely not doing the hx52.

i'm thinking more along the lines of something that can spool by5k, and still hold power all the way to 9k red line.

more thoughts nad turbo suggestions please.

FYI im used to the spool of a 50trim with a .63 hotside... so im not to pressed on having quick spool.

e s

^That sounds like a good turbo to run 25-27psi on and see what comes to light. On a side note, I am making damn close to 400whp with a t2 turbo @ 26psi netting me 100% duty cycle on my 700cc injectors at an 11.2 AFR.

[dash]

Quote »I'll agree that a T3/T4 is still a good turbo for most daily bangers, but referencing a

585hp "sick street miata" just doesn't prove much here unless you're the builder and can prove

exactly what's been done to the car in detail to support your case.[/quote]I posted a link to his build thread on this forum at least three times, for anyone to see. Considered it an excellent recipee for a high strung street 1.8L. Doesn't matter which one....

CA18, mazda BP or toyota 4/7AG hybrid, results would be outstanding regardless;Wrang the 50 trim to 29psi on stock cams(493hp), then installed reground intake, followed by

exhaust cam. Dyno'd after every change.Point was, the 50-trim has attained "monster" status. Good balance

These weren't "inflated" E85 numbers either btw - pump gas + injection (just like the buick GN

camp did for eons).Preferred the 50 over his GT3076.Torque was amazing at a staggering @505 ft-lbs! Never seen a CA or 7A as torquey or efficient as

the mazda imo, based on observations of course.... but all are still adequate nevertheless.To put it in perspective, the miata ET'd 11.1sec at only 380hp atw.

Racingmazda.com bone stock miata 1.8L smoked the competition ($$$ built integra 1.8 &

built sr20), in the highly publicised sport compact car 400hp street shootout way back. 50 trim

@25psi + fmic/pipes + exhaust + standalone.Only one holding a 10sec timeslip when the dust settled.

4/7AG fwd and rwd street rolla gone 10s; t3/t4 @25-27psi. Good stuff

Quote »Luckily for me, I have the recipe to have a reliable, internally stcok CA18DET, that's

capable of handling 400hp abuse all day in and all day out (I drive one everyday to work). It's

not rocket science.[/quote]Impressive indeed. Many of us would luv to get to that level some day

Quote »squeezing massive power out of a 4AG series engine is more of a challenge than the Toyota

boys swapping in a CA18DET and attempting the same feat as we have seen them do time and time

again which says alot about the CA18DET[/quote]Yup, to me, it says the CA is the most sensible/feasible option hands down. Nissan already performed the "upgrades" for ya, added a good gearbox and stock electronics that

has far surpassed 400hp.... all at a very reasonable price.Way too fussy and co$tly to boost a 4/7AG.

[Vetal]

There is smth. strange about torque of that Miata. Most 1.8 400whp+ engines make around 120lbs/ft at 3000, when turbo is spinning slow and engine is almost N/A. But this 1.8 Miata produces 160lbs, 33% more than average. That's why I'm not convinced about those results unless he's running 2.0 with 15:1 comrpession ratio