m20 turbo questions

[dougie30]

first of all yes i have done alot of searching and build thread reading.
im looking to turbo my m20 and i have a good idea on what im looking for i just have a few questions. im looking for around 300hp and i plan on building the head with hd rockers and the duel pattern bimmer heads cam. I also will be using megga squirt but im not sure on the size of the turbo.

Im not looking to spend a billion dollars and yes i know it wont be too reliable but i have been looking at the cx racing turbos. they sell the gt35 with their kit but i have read that it spools pretty late and it a bit to big, so i was thinking maybe a gt30/28? not sure if they would be to small or not?

for the manifold i have narrowed my choices to these two

http://www.amazon.com/gp/aw/d/B007BS7AS4?pc_redir=1398684061&robot_redir=1

http://m.ebay.com/itm/181401547470

I really like the adaptor but im not sure about how it will flow and if a 44mm waste gate will be to big?

and the full manifold im not sure on the quality and fitment. im just seeing if anyone has used either of these or have any input.

thanks,


Sent from my SPH-L710 using Tapatalk

[Nutzy]

Having seen (and tried to fit) the option 1 manifold in person, I would take the adapter! 44mm WG is fine.

HX35 is a cheap and plentiful turbo for you to use. Forum members often have these up for sale. The "GT" Chinese turbo's you are looking at are a poor clone of the Garrett dual BB GT's. Don't expect them to perform as well or spool as well.

The saying that goes "The poor man pays twice" can very well apply when it comes to turbo gear.

[paulyfresh]

with the obx shown in ebay add what else aside turbo is needed for a full pieced together kit? intercooler EMS and ....? id like to boost also but also "boostin on a budget" looking for a good kit that id pay once for done right...
whats reccomended set up's? im looking at kamotors

[dougie30]

thank you for the input nutzy i apreciate the input, and you dont think the hx35 is to big for the m20?

Sent from my SPH-L710 using Tapatalk

[TheTacoMan]

Definitely too big, I would go with 20g Sized seems to work well.

[dougie30]

what do you mean by 20g?

[Nutzy]

Definitely too big, I would go with 20g Sized seems to work well.

You're kidding me right? HX35 would have to be the most common M20 turbo I've seen used!

I used an S256, bigger than the HX35, on a stock B27. Full boost at 2800.

[sayed ali]

You're kidding me right? HX35 would have to be the most common M20 turbo I've seen used!

I used an S256, bigger than the HX35, on a stock B27. Full boost at 2800.

+1

HX35 is a common choice on m20, at least from my little experience :p

[blasphemy101]

The HX35 is commonly used because it's close to the right size for an M20, it's cheap, and it's durable. Most M20 turbo guys (like myself) just want boost at a cheap price. The HX35 definitely accomplishes that.

There are certainly better options but they either cost more or don't last as long. The HX35 is a good/easy choice, but not the BEST choice. You have to keep in mind a T3-flanged 20g is either an Ebay turbo or costs 3x as much as an HX35.

[dougie30]

what im worried about is when it will start boosting, i have the obx adaptor and im sure it dosnt flow to great so i dont know if it would spool the hx35 soon enough as a high flow manifold

Sent from my SPH-L710 using Tapatalk

[Nutzy]

That adapter looks about as good as it gets. Plenty of dudes have been making whopper power with stock manifolds and the original and OBX adapter. Having seen the ebay full manifold, I was less than impressed with its quality, port angles, and wall thickness. I sent mine back and got a refund. Big POS!

The Kinugawa TD06 20G would be a reasonable choice for your goals. 58mm turbine exducer so lets the M20 breath easy. $900

http://www.ebay.com.au/itm/Kinugawa-2-4-Turbocharger-TD06H-20G-T3-Flange-12cm-/271465493800?pt=AU_Car_Parts_Accessories&hash=item3f349ab528&_uhb=1

The GT3076 has a smaller turbine and BB centre and will spool harder. Russian Blue (IIRC) used one of these and reported he thought it was too small, too hard to modulate. But IF you are truly only seeking around 300 crank HP it'll be OK. It does cost around $1500 though....

[ak-]

One of the 18g Kinugawa turbo's have the exact same iducer/exducer specs on both compressor/turbine wheels as a gt3076R.
This was going to be my choice of turbo until I just rebuilt mine instead. My goals were higher than yours too.

[dougie30]

that is a nice looking turbo, the same type kamotors uses in his kit i belive. its just a bit to pricy for what im looking for.

this is my first turbo build and im learning how to tune. i dont belive its a good ide to strap a 900$ turbo on if im more than likely going to break something.
just looking for a some cheaper options

Sent from my SPH-L710 using Tapatalk

[speedracer 2002]

what are you planning on breaking? If you want to turbo an m20 successfully the right way once then you're going to need to spend the money or you'll have to do everything multiple times. M20 motors are fairly strong when they're not pushed to their limits and maintain properly.

I daily drove my M20 6262 E85 turbo e30 for over a year on 13lbs make about 315 to the wheels with no issues. I have since went wasted spark and turned it up to 19-20lbs making over 420 to the wheels. Take in mine my M20 is just a freshened up 885 head, headstuds, headgasket. Nothing else.

[dougie30]

i dont plan on breaking anything, im just saying im doing a budget build and its my first time so id like to start will some cheap parts anf work my way up once its tuned properyl anf i work out the bugs

Sent from my SPH-L710 using Tapatalk