a good ca18det turbo size?

[Chinamandrift]

ok ive read up that a GT25-10 will do up to 300WHP with the least lag

and if u dont want to max out the turbo go with a GT25-30... and that supposed to go up to 350WHP with the least lag possible

i read this somewhere, just checking to make sure the ca18det gUrus agrees with this.

whats a T3 or t3/t4 series turbo thats close to the same as the GT25-30? i plan to run a top mount but they only come in t3 flange.

im just looking for an upgrade with most response .....least lag possible...i guess you can say im looking for the disco potato turbo for the CA18DET

[c-rad]

Why not just get an S15 T28? I got mine for less than $700 shipped.

[OverBoosted180]

Yeah! C-Rad is right. U can go the Gt route or if u wanna go a little bigger, a str8 t/3 or t3/t4 with a .48 back is perfect! Orrrrr......if you've got the bread to spare and wanna go all out..There's always the Gt35r

[mbmbmb23]

ok ive read up that a GT25-10 will do up to 300WHP with the least lag

and if u dont want to max out the turbo go with a GT25-30... and that supposed to go up to 350WHP with the least lag possible

i read this somewhere, just checking to make sure the ca18det gUrus agrees with this.

whats a T3 or t3/t4 series turbo thats close to the same as the GT25-30? i plan to run a top mount but they only come in t3 flange.

im just looking for an upgrade with most response .....least lag possible...i guess you can say im looking for the disco potato turbo for the CA18DET

If I'm not mistaken the hks gt2510 is, in essence a full ball bearing version of the S13 Sr T25, thus....250hp max but spool is insanely fast.

-m

[tyrannix]

Yeah! C-Rad is right. U can go the Gt route or if u wanna go a little bigger, a str8 t/3 or t3/t4 with a .48 back is perfect! Orrrrr......if you've got the bread to spare and wanna go all out..There's always the Gt35r

wouldnt a .48 be just a tad small for a t3/t04? (ive been thinking t3/t04e with like a .57ish turbine housing.. my quick skechy math says full spool a little under 3500 and more top end flow (more max power) than a .48

am i illogical?

CJ

[themadscientist]

.48 is what the HKS kit true T04E uses. The FJ20 uses a .63 T3 on the non-intercooled model and .48 on the turbo C with the intercooler so a .48 T3 might be fine on the CA18 for response purposes.

[nocwage]

My T3 Super-60 has a .48 turbine housing and it spools pretty fast.

Boost threshold is around 3000rpm and I make 17psi before 4k.If i'm already at 4000rpm and floor the car it spools VERY fast to full boost.

[Chinamandrift]

when does the turbo start to spool ? ........my friend used a HKs GT25-10 on his ca18det its spools super fast...let me ask him for info on it....i want to do a top mount set up ...the ex manifold only come with a t3...t3/t4 flange... so im looking for a t3 or t3/t4 turbo thats the same as the gt25-10 or gt25-30.......im not looking for massive amounts of power....im looking for response and less lag as possible. something with a quick spool time... i will look into the T3 .48........is this turbo a ball bearing turbo ?

i talked to a guy with a 4agte with a T3 .48 and he said it dont start spooling until 4000 rpms .....but then again thats a different motor....but i still dont think thats right

[float_6969]

A T3/(T4,T04e) w/a .48 is a great turbo for the CA. It's not horribly laggy, but still flows well at the top end.

[nocwage]

Mine is a plain old fashion journal bearing T3, nothing fancy because it's my 'learner' setup. I'd rather need to $120 rebuild a $500 T3 than buy a $1000 ball bearing CHRA for a $1500 turbo...

Although I have a RHD car so I had a lot of room to 'optimize' the downpipe etc from the turbo.. i.e my exhaust from the turbine travels straight for a good 5" or so before any 'bends'.

'start to spool' is boost threshold, on my setup it seems to be about 3000rpm.I need to borrow a laptop and then I can graph it for you with my zeitronix.

[Ca_Silvia]

Why not just get an S15 T28? I got mine for less than $700 shipped.

Highjacked

Where from C-rad?

[float_6969]

Yea, that's $150 less than what I paid for mine. Ofcourse mine is fubared now, but I leanred my lesson. No more BB turbos. $600 for a new CHRA for an $800 turbo is stupid.

[themadscientist]

My S14 turbo has served me well for eight years. Bought it new from Nissan for about $800.00

[Ca_laurier]

i have to totally agree. my engine came in with a t28 and wow, now thats a difference

[asher4857]

im about to start running an SR T25 which ive heard is a night and day difference even though its stilla t25.. Im stoked.. im addicted to boost!

[float_6969]

I'm building a T28, it just won't be BB.

[Chinamandrift]

are those turbos BB?.....the GT25-10 i experienced was BB ....it spooled up really really quick .......almost no lag....

.the T3/(T4,T04e) w/a .48 ...u said its not horribly laggy .....is there something a step under so it doesnt lag as much ?........

My CA is going into my AE86 .....these cars with 170hp is more then enough .......thats why im not looking for power.....im looking for response.....the less the lag the better

anyone else run any other turbos comparable to the GT25-10?

[dattodude]

On my CA18det (in a 1800 pound datsun) I'm running a GT2540, which is laggy in any man's language. I am running 2.5inch intercooler piping and frontmount, although it's as short as possible in length.

I originally had the 0.86 exhaust housing, and got a 0.63 housing from a GTRS machined to suit. The lag dropped about 500rpm, and really started to feel better at usable revs.

I've got big cams, worked head and forged internals, so I'm heading for peak power at high revs, which isn't everyone's aim.

So we'll see. I might have to fallback to the larger Disco Potato if peak power isn't below 9000rpm. I'll know more in the next couple of weeks.

Cheers.

[float_6969]

What about a simple SR T25? I mean, if you want a turbo spools quickly, but doesn't fall off at the top end like the stock turbo does, and you're conent with 190-220rwhp, it's a good little turbo. Plus it's a journal bearing and is rebuildable. The GT series turbo's are great, but if ANYTHING happens to them, you have to buy a new one. You can't get parts and nobody has the special machine needed to balance it.

[r34 gtr]

i was kind of unimpressed with my gt28 at 17psi. ive found my car has enough fuel to do it safely, and itll make 17+lbs before 4k in 2nd-5th. kind of makes me think of what i need to do. if only i had the money for a built bottom end. its plenty quick, but i just know if its got the grunt. my dad's new bmw seems to have way more go.

[Chinamandrift]

isnt the GT25-10 the same as the t25 from the SR's just ball bearing??? .......u should really try the GT25-10....its spools up even quicker then the t25 from the sr's ....i love the response on that turbo .....but my problem is ......how am i going to get something similiar to that in a top mount set up ?......the ca18det is going in my ae86 ...the lower i go ...the less room i have.....i figured moving the turbo up ...will give me more room to work with......but all the top mounts are t3-t4 flange set up .......

[Chinamandrift]

yeah the gt28 is a bit too big and laggy for where i want to be haha........many of us are barely making the living ...so its ok ....but if u save like maybe $20-30 a day .....eventually it will add up and u can get wat u want ....it takes longer but its a sure deal unless u pull the money out for something else

[nocwage]

i was kind of unimpressed with my gt28 at 17psi. ive found my car has enough fuel to do it safely, and itll make 17+lbs before 4k in 2nd-5th. kind of makes me think of what i need to do. if only i had the money for a built bottom end. its plenty quick, but i just know if its got the grunt. my dad's new bmw seems to have way more go.

It's called torque, a 3.0L i6 NA car will instantly punch, our CAs build..

My daily driver is a Spec-V and that car 'feels' faster than my CA when I gun it.. except that my CA can go from 120km/h to 180km/h in under 8 seconds where as my Spec-V cannot.

With so little torque you lose the perception of speed..