Stock snail efficiency

[mazdaman]

What's the max PSI setting for the stock turbo on the CA motor before the turbo loses it's efficiency?

[boost_boy]

12psi........

Dee

[mazdaman]

12psi........

Dee

That's a bit low.... I kinda expected more. I had an 89 Ford Probe GT turbo that would pull 16 PSI from the stock turbo. Now the ECU had to be chipped due to a 12 PSI overboost fuel cutoff.

That being said. The stock setting there (Probe) was 7 psi with a 9 psi spike at 3k rpm. When the boost was upped, massive difference.

Could I expect similar differences, or should I look for another turbo to put on?

[c-rad]

That's a bit low.... I kinda expected more. I had an 89 Ford Probe GT turbo that would pull 16 PSI from the stock turbo. Now the ECU had to be chipped due to a 12 PSI overboost fuel cutoff.

That being said. The stock setting there (Probe) was 7 psi with a 9 psi spike at 3k rpm. When the boost was upped, massive difference.

Could I expect similar differences, or should I look for another turbo to put on?

The stock CA T25 won't even hold 12psi. It will drop to about 8-9 by redline. Honestly, you would be lucky to get 190whp out of a CA T25.

[boost_boy]

If it doesn't hold at 12psi, then your turbo is screwed! I've seen them hold anywhere from 10-13psi steadily. Unless you have an excessive amount of carbon holding your wastegate flapper open, they should hold 10-12psi.

Dee

[Sil40sK]

I'm running 10psi perfectly fine, no drops of anything, that's just via an HKS adjustable actuator.

I had an 89 Ford Probe GT turbo that would pull 16 PSI from the stock turbo.

Not to sound like a d!ck or anything, but CAs are not Fords! Just because Probes have similar turbos dosn't mean they are identical, and yes you can boost to 15 or 16 psi on a T25, but it's not really efficient, it will drop down after abou 4k just due to the fact that the motor starts spinning the turbo too fast for it to continue sucking in enough air to compress. It'd be like putting robotic actuators on a midget to make him run 20mph, yea it works and he can run fast, but it dosn't make it effecient. That being said, 12 is about the max you'll get out of your stock T25, consider upgrading to an SR T25, a non-bb T28, or a bb T28, or even possibley a T25 off of a VG, or a T3G from a Skyline. Just my 2cents.

[c-rad]

I'm running 10psi perfectly fine, no drops of anything, that's just via an HKS adjustable actuator.Not to sound like a d!ck or anything, but CAs are not Fords! Just because Probes have similar turbos dosn't mean they are identical, and yes you can boost to 15 or 16 psi on a T25, but it's not really efficient, it will drop down after abou 4k just due to the fact that the motor starts spinning the turbo too fast for it to continue sucking in enough air to compress.

Plus, don't the probes use IHI turbos? It's a turbo designed to be efficient on a 2.2L, the T25 on the CA was designed for a 1.8L. If you want efficiency out of a small turbo, go for a TD05-14b from a first gen DSM. You can run 18-19psi and get 260+ to the wheels out of them.

[nismoplsr]

The stock CA T25 won't even hold 12psi. It will drop to about 8-9 by redline. Honestly, you would be lucky to get 190whp out of a CA T25.

I pulled 195 whp running 14psi that if i remember correctly dropped down to 12 at redline.

[nissanic89]

If you want efficiency out of a small turbo, go for a TD05-14b from a first gen DSM. You can run 18-19psi and get 260+ to the wheels out of them.

ill be puttin one of those on here very shortly

[89'ClubK's]

I was going to keep my factory CA T25 but then it bit the dust. Due to the milage, it'll be best to swap it. With it's .48 A/R compared to the SR .80 A/Rit spools very fast, but will reach max boost around 50mph. My factory unit held 9 lbs. w/o a boost controller and using a SMIC. My car is also an AUTO.I had an SR unit for awhile, but then it went out. No shaft play, but the seals were bad. With the engines setting for a long time, the seals will dry out, and the turbo looks good otherwise. Use it until you can upgrade. Hopefully you'll be able to swap on your terms and not it's. It cost $400 to rebuild. I'll be getting a GT25 from my buddies AUDI soon."Sil40sk" is correct. Don't go to large or you'll just create alot of lag. Stay away from Skyline turbos. They're old and are ceramic. Worthless really.Hope that helps!

[mazdaman]

Soooo, lets suppose I can fab or have fabbed a manifold for the IHI I have in my possesion and mount that setup....

Any disagreements on this?

[89'ClubK's]

Sounds tricky and risky. It may cost you more to have everything fabricated.You'll most likely need to make custom oil lines as well. Will the factory "dump" pipe hook up to it? or would one need to be made?It would be alot safer and less headache to go with a decent aftermarket CA manifold and a turbo that'll fit w/o any mods. If the turbo in your possesion is good, consider selling it in order to help out with your upgrade.

[Rookieca18det]

If you want efficiency out of a small turbo, go for a TD05-14b from a first gen DSM. You can run 18-19psi and get 260+ to the wheels out of them.

I had a td05-14b and it was very responsive and fun as hell at 15psi, great turbo for a street CA.

[DrIft Ready]

man i wish my friend turbo fit..tdo418g shoulg get some mean power out of itcame on his engin

for sale 450

[mazdaman]

man i wish my friend turbo fit..tdo418g shoulg get some mean power out of itcame on his engin

for sale 450

I will keep this in mind.

[GoofyATX240]

TD06 20G is also pretty decent. I enjoy mine heh.

[Kittychubbs]

I know im in the CA forum but my friend has a KA24deT and hes not sure cuz he read Sstreet and it was said 9psi stock KA its safe. he has a to4e turbine running 9psi. he ask me but i have SR and im not sure i though it was like 12psi safely on a stock KA.Im gunna tell him tomorrow i told him lol can anyone help? thanxshould i tell him to sell his 9psi and get a diff

[89'ClubK's]

You can boost a KA higher than that. My buddy has a T3T04 running @ 14 lbs. Awsome! The factory CA and SR can go up to 13 lbs. I believe w/ 370cc injectors. Anything higher is kinda useless w/ a T25.

[Kittychubbs]

aight thanx man i told him he was like nah for reals.I have a hatch on the driveway with an 102miles KA so i say KAT for that one why not.i told him to get a E manage and SRinjectors he has a Z32 maf too.

[beans33]

I was about to say anything over 6-7 psi on a ka with stock injectors IS NOT SAFE ! Ive evpereinced bad things when leaning out a ka-t. I thought this was a CA forum ?

[Kittychubbs]

yeah i know it was just a quick question, but no he does have sr20 injectors actually the ones i had. since i upgraded thanx man

[89'ClubK's]

Yeah, my friend uses Sard 550cc on his KA. I thought the safe topic was on it's internals. It's still expensive whatever route you go. Enough KA talk!Lets get back to the JDM!!!

[5 Skware]

Sorry for the Noob question but I am a Noob (when it comes to CA's)! Will the 1st gen td05-14b turbo bolt on directly to the stock manifold or would I need a different manifold or some type of adapter? Thanks guys

[boost_boy]

Sorry for the Noob question but I am a Noob (when it comes to CA's)! Will the 1st gen td05-14b turbo bolt on directly to the stock manifold or would I need a different manifold or some type of adapter? Thanks guys

No! You will need a different manifold or an adapter like you said. Not worth it............

Dee

[5 Skware]

No! You will need a different manifold or an adapter like you said. Not worth it............

Dee

Are manifolds that work with the TD05 turbos readily available? I have seen some Greddy ones on EBAY but I am doubtful of whether they will work on left hand drive cars without major mods. In your guys opinion is this turbo a good way to go given price and performance or would it be better to just go with a T3 turbo and manifold setup? I know by going T3 the sheer number of available turbos will be much higher and I figure I can get different ones to meet my power goals at the time IE; start small and go bigger once I have the motor built. Advice??