most boost on stock internals

[burnout 180]

what is the most boost that can be used on a ca18det stock internals?

I plann on upgrading my turbo system exaust system and cooling system...

Basically I don't want to go into the expense and head ach of going into the engine.

[8ggalant]

there are plenty of people runnin upwards of 1 bar (14.7 psi or so) on stock internals...on the stock turbo this is pointless as that is past its effieciency (sp) range ...just make sure if yer upgrading the turbo u have enuf fuel to support the ammount of air yer gonna be forcing into the engine now... 10 psi on the stock t25 and 10psi on a gtir t28 (or other bigger turbos) is NOT the same...good luck

[CA19DET]

i am running 15psi on my stock block CA (no oil squirters) with a T3/T04E which is porbably about 30psi on a stock T25 hahah jk ... and while tuning my boost controller i hit 20+psi, and the engine is still going VERY strong.. i am running a HKS 1.6mm Headgasket & ARP headstuds so my comp ratio must be like 8.2:1 or lower and my head isnt going to lift jsut so...

i am going to run 18-20psi when i go to the dyno next week hopefully.

[boost_boy]

what is the most boost that can be used on a ca18det stock internals?

I plann on upgrading my turbo system exaust system and cooling system...

Basically I don't want to go into the expense and head ach of going into the engine.

I've had 25psi bursts on the stock CA18DET. It held up pretty good with no ill effects. I've dyno'd the car at 20psi on over 15 pulls. it's not what's in the engine , but what you you use to fuel and control the engine.

Dee

[burnout 180]

i want to know what is the highest boost a ca18det owner should run before they need to start thinking about upgrading any internals and also before the engine starts to become unreliable and unstable.

I want to know this so that i can determine the best turbo i should buy to meet the ideal boosting range of a ca18det.

I'm looking to make my ca18det fast, reliable, and efficent and it won't be smart for me to buy a big T4 turbo now just to find out later that the best boost to run on a ca18det with stock internals is 10 psi because that would mean that i would have uneccesary turbo lag when i could easly buy a smaller more efficent turbo to meet that kind of boost with half the lag.

P.S I plann on also upgrading my cooling system, intercooler and piping, down pipe, headers and fuel system (depending on weather the amount of boost u guys tell me that i should use on my ca18det can't be supported by the exsisting fuel system.)

[burnout 180]

The reason i don't want to go into internals is because where i live we don't have any facilitys that can bore out my cylinders or do any machining like a three angle valve cut.

Their isn't even a dyno down here that i could tune my engine with.

So me and other tuners around hear have to work with what we have or just build a grossly untuned engine. So we rely on our own ability to tune.

Baisically all the shops around hear focus on maintaining and fixing cars not on working on pushing engines to their limits

[boost_boy]

i want to know what is the highest boost a ca18det owner should run before they need to start thinking about upgrading any internals and also before the engine starts to become unreliable and unstable.

I want to know this so that i can determine the best turbo i should buy to meet the ideal boosting range of a ca18det.

I'm looking to make my ca18det fast, reliable, and efficent and it won't be smart for me to buy a big T4 turbo now just to find out later that the best boost to run on a ca18det with stock internals is 10 psi because that would mean that i would have uneccesary turbo lag when i could easly buy a smaller more efficent turbo to meet that kind of boost with half the lag.

P.S I plann on also upgrading my cooling system, intercooler and piping, down pipe, headers and fuel system (depending on weather the amount of boost u guys tell me that i should use on my ca18det can't be supported by the exsisting fuel system.)

Reliably, and on the stock fuel system, I'd say roughly 13psi of boost. You wanna go up in boost, you'll need to upgrade the essentials like injectors, turbo, intercooler, ecu, and afm. I hope that anwers your question about how much boost the CA18DET will handle and remain reliable.

Dee

[Turbogixxer]

Do not think PSI, think in CFM. You generally rate how much a bottom end can hold (with proper tuning) by wheel horsepower.

If you plan on uping the boost or getting a bigger turbo, make sure you get the right EMS and fuel upgrades.

[onevia1800cc]

this may and may not be off topic. but here goes, i have a FMIC,dump and down pipe 3" Xhast,chipped ecu,t28,255 fuel pump,arc box. what amount of boost can i push before I have to upgrade my injectors/maf?i have the stock ca maf and ka24e maf,which would get me farther??

[boost_boy]

this may and may not be off topic. but here goes, i have a FMIC,dump and down pipe 3" Xhast,chipped ecu,t28,255 fuel pump,arc box. what amount of boost can i push before I have to upgrade my injectors/maf?i have the stock ca maf and ka24e maf,which would get me farther??

You're about ready to start upgrading the injectors now. I want to say 15psi, but that's pushing those poor 370s to their limit. The KA24E's maf would work just fine.

Dee

[float_6969]

I personally think 13 is about the limit that I would run on my car safely. At least with the stock setup. As far has how much an untouched bottom end can handle I don't know that anybody has pushed a properly tuned CA18DET to the breaking point.

It's ALL about tuning...

[nismoplsr]

with stock fuel system i ran 14 PSI on the stock t25 that was about the limit of the 370s. This is about 22lbs a min of air.

Currently on my GT28RS i am running 18PSI which is about 33 lbs a min. I plan on upping the boost to 20-21 psi soon which will be about 35 lbs a min of air maxing out the turbo and the strength of the stock headbolts and gasket.

lbs or air a minute is directly related the the hp output. Every 100hp equals about 10lbs or minute of air.

[float_6969]

...lbs or air a minute is directly related to the hp output. Every 100hp equals about 10lbs or minute of air.

This SHOULD read, "...is directly related to the POTENTIAL hp output.".

[onevia1800cc]

ok so 15 lbs would be like only on the dyno and at the track 10-13 lbs to be safe for commuting? what injectors would i go for first 440's or 550'si don't want to buy one now then just need other's later. ka24e maf "POTENTIAL" hp rating?? i'm looking for around 300. is this possible with my setup?

[c-rad]

ok so 15 lbs would be like only on the dyno and at the track 10-13 lbs to be safe for commuting? what injectors would i go for first 440's or 550'si don't want to buy one now then just need other's later. ka24e maf "POTENTIAL" hp rating?? i'm looking for around 300. is this possible with my setup?

KAE maf is only good for about 240hp. And as for injectors, just go with the 550s.... no sense in buying them twice.

[onevia1800cc]

so 550's and a z32? or rb maf ? 300 hp is all i need. more power means less room for error. so i don't want to push it 300 is alot more than 175

[boost_boy]

so 550's and a z32? or rb maf ? 300 hp is all i need. more power means less room for error. so i don't want to push it 300 is alot more than 175

You have answered your own question. And the RB or Z32 maf will accompany you with your quest.

Dee

[onevia1800cc]

thank you to everyone

[CA19DET]

GT2871 .64 T25 HKS actuatorTOMEI 256*/260* Cams550cc injectors, Lightweight Flywheel, short runner custom intake...