buku_points

im trying to find out if anyone is running this turbo on a ka24de. if so how much power are you making? im almost ready to boost my s14 but im trying to find out if this turbo is good to get me to the 300 hp club with out the lag of a t3/t4 or a gt30. i really dont want to lose mid-top end power. if anyone has any info on running this turbo on a ka please let me know thanks.

poziden

there are a few people on ka-t.org that have gt2871r at 300rwhp, but i think they may be running .64ar. im sure .84 is good for 300hp.

Silverbullet

if ur concerned about spool time, GT28Rs are even smaller and will do 300WHP.

ppl have made 400WHP on the smaller 0.64 GT2871R.

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buku_points

really? i never thought about running a gt28rs ill do some more thinking to determine which turbo ill use. thanks for the info

KA-T_240

get the gt2871r. even with the .86ar, you dont need to worry about spool. You will have no problem getting 300whp out of it.(as long as your fuel and tuning are there)


On my ka-t, I have a gt32(non ball bearing) and hit 18-19psi at pretty much 3400rpm.

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buku_points

yea im looking for a turbo that will start spooling around 3k-3500 rpm and keep power all the way through to 6k and i plan on running 14-16 psi

Nismoknightska-t

get the .86ar for sure.. that turbo will hit full boost like mofo!!!

the ams gt32 is a great turbo.. im running the ams gt33 and i hit 18 psi by 3800

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Aoshi112

Got ur dynograph? I'd like to see the powerband of the GT33

buku_points

Damn 18 psi that quick? i havent looked into any ams turbos yet but i will now. do any of you guys know of a shop that has good deals on an .86 ar turbo? i really dont want to buy a used on unless i knew the person who was selling it to me.

Silverbullet

GT28R's. The s was possessive. Not that the GT28RS is a bad turbo, but for the price, you may as well stick with the GT2871R. You can get a GT28R for around 750 new, and 400-600 used.

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number80

You could probably even run a GT3071r 63a/r and get full boost within that range on a 2.4 KA. That would be my choice if you're looking to go with the BB ones.

louisdaboois

lol, surprisingly enough there are a few ka-t guys that have breeched almost 280whp with a T25. So, on that note, im pretty sure a gt2871 will be sufficient. Honestly, im looking into buying one for my ka-t, it sucks big ass with a t25. Hope youre project goes well man. kat's are the way to go, forget about those dumb sr's =P

number80

oh no you just started a ka vs sr thread LOL. It's 90% sr here.....just messing around. Anyways I only mention the 3071r since is ka24de spools up faster and should hit full boost by what the op wanted plus you have more room to grow since we all know you can never be satisfied for long.

buku_points

yea i saw a video of some guy running 21 psi on a gt3071r and that car hit full boost like around 3500 rpm my i have lots of options im just not decided on which set-up im gonna run with.

heiyuu

OH NO YOU DIDN'T!

Go with the disco potatoe just so you can say you have a disco potatoe

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((sr)) kelly

i have a .86 for sale.. just PM me

eek

GT2871 .64 will spool faster and you can easily hit your 300whp goal.

((sr)) kelly

300whp will get old .... trust me

Firestorm

go with the .86 2871. will spool fast enough and leave you room for more power in the future.

codyace

Ah, another .64 versus .86 debate hehe.

I'd personally go for the 2871r in the .64 housing. It'll spool majorly fast (I've got 20 psi at 3800 rpm in my SR), and still retain all of the top end punch you'll ever need (400 peak hp for me, and it doesn't fall off).

The .86, while nice, is IMO no better/worse than a traditional small housing and trim t3/t4 (in terms of spool up, response, and power potential). I often say on the SR side of the house, that in terms of turbos, I'd rather see someone go with a cheaper t3/t4, or simply get a 30r variant, than waste money with the .86 housing.

If you're concerned with response, and happy with 300-400 whp, the .64 housing on the 2871r is the way to go. Combine that with a 4.40 rear diff (or a 4.60) and you'll have a total street bruiser that will make cars with much more HP look silly, both on the track, the road course, and the street.


Are you Dan Quayle? Hehe

Haha, boost is like crack...I'll attest to that

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dirtdiggler666

ok assuming on a ka boost with .64 will kick in?
when will it kick in with the .86???

oh and because the ka has bigger displacement wont the boost come on quicker than it would an sr??

!Zar!

I'd much rather have a .64 over the 86.

To me the .64 would have more usable power.

Fuck peak.

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codyace

In terms of strict displacment, you'll usually see faster spool, but you also need to take into boost response versus lag. There may only be a 500-800 rpm difference in spool on the dynochart, but that car my rip up into the powerband almost twice as fast (look at it as power over time, and not so much power over engine speed).


I'd go as far as to say that with a 2871r .64, and a log(ish) style cast manifold (or a properly coated tubular), that you could probably see a full bar o fboost in the 3200-3500 range, depending on cams, total efffective gearing, and the sort. That would give you KA guys a nice fat torque plateau to work with (potentially 3000 rpm worth).

FWIW: If I ever had to turbo an altima again (yea, I'm wierd, I had a turbo altima as my first project back in highschool), I'd be running a 28RS or a 2871r .64.

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codyace

+1. The only way to fly.

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EDacIouSX

if you want response and linear powerband i believe gt28rs will be your best choice and it will make 300 @ wheel.

if you want power then gt2876/71 whatever is not a good option for the ka since you can spend the same amount of money on abigger turbo and get more. well, almost the same amount of money...

i wonder how much tq a gt28rs would make @ 300 hp

grips13

both turbos are very good.. but you could really take advantege of the .86 since you have a 2.4 liter

the .86 pulls ALOT harder from 5k up then the .64 could ever dream of.. and once the turbo is spooled, its spooled.. so if you dont care about a second or 2 extra spool time in first gear deff get the gt2871r .86... its all about what you want

codyace

28RS cars never make as much top end torque/hp as the 2871r do. 9/10 28RS situations (on SR20) veruss 2871 result in almost equal ramp up boost, and equal power per rpm. (similar exhaust housings FTW).

The main advantage of the 28RS is that off boost it reacts a SLIGHT bit faster (maybe due to the wheel differences/weights)...but nothing worth having over the complete power curve of the 2871r.


In my dealings, I rate the 2871r and 2876r are totally different turbos, and don't even remotely react the same on most cars. The only thing they share to me is the flange...aside from that, I don't ever suggest the 76r to anyone.

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Oo_Skyline_oO

does anyone know HOW MUCH faster the .64 spools??? enough to loose potential hp??

codyace

Did you read any of my posts?


The increase in spool and response is worth giving up the 10-20 peak hp.

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JVD

It's on a KA tho.

I think the car I rode in had a .64. It was retarded. Felt like an NA car.