Ok i plan on swaping out my pathetic sohc ka for a ca18. now i don't want to keep the stock small and potentioly blown turbo on the ca. so i was thinking of what to replace it with and i am stuck between 2 turbo's.
- gt2871r- gt3076rnow i know the 30r will spool later but i'm trying to figure out how much later then the 28r? also what would the responce be at higher rpm. like when exiting a corner or w/e?
Now i have rode in a evo8 with a gt3076r and it was fantastic and prolly one of the most reponcive and fun cars to ride in.... so how does the ca18 flow compared to the evo's 4g63?
i'f i havn't mentioned i will be useing this car as a weekend track car heading to the local road course and drift event...
turbo size question???
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falling rock
- Posts: 2
- Joined: Wed May 16, 2007 10:11 pm
- Car: 90' 240sx fastback
Re: turbo size question??? (falling rock)
You don't want a 76 wheel in the rear for a CA18.I ran GT28/76R, totally unresponsive. I've taken it off for a HKS GT2530.That'll get torque monster required for some hot laps of the twisty kind..
A CA18 is not an SR20... trust me on this one. Even the GT2871R is too large in my opinion, unless it's a drag only application.
A CA18 is not an SR20... trust me on this one. Even the GT2871R is too large in my opinion, unless it's a drag only application.
Re: turbo size question??? (dattodude)
Also your turbo application is going to depend on the rest of your setup.
Will you rebuild the motor first? Upgrade valvetrain or bottom end?What kind of intercooling will you use?How much charge piping will it have?Will you upgrade the fuel pump, injectors, and get an adjustable pressure regulator?Will you get an aftermarket intake manifold or bigger TB or both?What PSI range do you plan to run?
All this directly or potentially affects turbo size. I'm sure there's more I haven't thought of.
Will you rebuild the motor first? Upgrade valvetrain or bottom end?What kind of intercooling will you use?How much charge piping will it have?Will you upgrade the fuel pump, injectors, and get an adjustable pressure regulator?Will you get an aftermarket intake manifold or bigger TB or both?What PSI range do you plan to run?
All this directly or potentially affects turbo size. I'm sure there's more I haven't thought of.
Re: turbo size question??? (dattodude)
Too large?...even the .64 A/R hotside version?dattodude wrote:A CA18 is not an SR20... trust me on this one. Even the GT2871R is too large in my opinion, unless it's a drag only application.
-m
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falling rock
- Posts: 2
- Joined: Wed May 16, 2007 10:11 pm
- Car: 90' 240sx fastback
Re: turbo size question??? (wewders)
I will run the motor for a bit just to get the stuff built that i want done right away. then it will get built.
I'm stuck on if i should build a v-mount setup or go with a basic fmic setup...this will be a track car mostly so i'm leaning towards a v-mount.
i do plan on upgrading my fueling needs as needed for the given hp i will make.
well i'm going ot be making a sheet metal intake manifold with volosity stacks and a 4 runner style instead of the 8 runners with the butterfly valves. it will incorporate a larger throttle bady as well.
I don't really have a given psi range i would like to run. But i would liek around 350+ hp and i would like to get there efficiently....
My other question is wouldn't the t2 housing choke the ca up top in the 8k-9k rev range? my concern is it just not flowing up there.
I'm stuck on if i should build a v-mount setup or go with a basic fmic setup...this will be a track car mostly so i'm leaning towards a v-mount.
i do plan on upgrading my fueling needs as needed for the given hp i will make.
well i'm going ot be making a sheet metal intake manifold with volosity stacks and a 4 runner style instead of the 8 runners with the butterfly valves. it will incorporate a larger throttle bady as well.
I don't really have a given psi range i would like to run. But i would liek around 350+ hp and i would like to get there efficiently....
My other question is wouldn't the t2 housing choke the ca up top in the 8k-9k rev range? my concern is it just not flowing up there.
Re: turbo size question??? (falling rock)
i have the s14 t28. havent driven it with that turbo but it should be interesting. the ca with stock turbo at 11psi shocked the hell out of me..definately a fun car.
Re: turbo size question??? (dattodude)
wha?????? More info pleasedattodude wrote:You don't want a 76 wheel in the rear for a CA18.I ran GT28/76R, totally unresponsive. I've taken it off for a HKS GT2530.That'll get torque monster required for some hot laps of the twisty kind..
A CA18 is not an SR20... trust me on this one. Even the GT2871R is too large in my opinion, unless it's a drag only application.
Re: turbo size question??? (adam-gtX)
Ok, I've got a pretty full house CA18det. Forged pistons, all tomei head internals, big intercooler, flowed head, all sorts of fancy bits in the region of US$10k spent on engine and attached bits for the engine, Autronic ECU/CDI. Remember, none of this is labor costs.
I ran a GT2876R with 0.86 housing first. Nothing until 5 grand, might as well have a ca18de for driving in traffic or on 40% of a race track. I'm dead serious about that. I could barely spin the wheels on 2nd gear changes. I've been in L20B Nissan Urvans with more power. Spent another $600 on a 0.63 housing, most 0.63 housings in dealer stock have to be machined out to suit the bigger exhaust wheel on the 76R. This made the car better, but still not a powerhouse on the street, even with 16psi boost..
My point is that if 80% of your power is in 20% of the usable rev range, you won't enjoy driving your car. You'd need to be running 22-25psi boost to get the most out of the big housings, and the benefit would only be seen on the dyno graph.
Go get a big turbo..I dare anyone. It will be a big waste of money, and you'll spend months making up typical BS stories on these forums about why you aren't getting that 400hp you expected.
Yes the stock T25 is too small...but getting a replacement that is so much bigger is not the answer.
I've almost finished fitting an HKS GT2530 (as my engine builder recommended in the first place 6 years ago) and I'm going to get on with life.
There is so much false information on turbos on Internet forums, I know it's hard to determine who is telling the truth.
Regards,Chris
I ran a GT2876R with 0.86 housing first. Nothing until 5 grand, might as well have a ca18de for driving in traffic or on 40% of a race track. I'm dead serious about that. I could barely spin the wheels on 2nd gear changes. I've been in L20B Nissan Urvans with more power. Spent another $600 on a 0.63 housing, most 0.63 housings in dealer stock have to be machined out to suit the bigger exhaust wheel on the 76R. This made the car better, but still not a powerhouse on the street, even with 16psi boost..
My point is that if 80% of your power is in 20% of the usable rev range, you won't enjoy driving your car. You'd need to be running 22-25psi boost to get the most out of the big housings, and the benefit would only be seen on the dyno graph.
Go get a big turbo..I dare anyone. It will be a big waste of money, and you'll spend months making up typical BS stories on these forums about why you aren't getting that 400hp you expected.
Yes the stock T25 is too small...but getting a replacement that is so much bigger is not the answer.
I've almost finished fitting an HKS GT2530 (as my engine builder recommended in the first place 6 years ago) and I'm going to get on with life.
There is so much false information on turbos on Internet forums, I know it's hard to determine who is telling the truth.
Regards,Chris
Re: turbo size question??? (dattodude)
Friend of mine runs this same turbo with 0.86 housing. He is getting full boost by ~4300rpm.He has stock valvetrain, lowered CR, and stock manifold. So why you have nothing until 5000 is something to think aboutdattodude wrote:I ran a GT2876R with 0.86 housing first. Nothing until 5 grand