extremeracer

Manifold design is key

Take advantage of the divided housing and use a split pulse manifold
I see 12psi (wastegate pressure) at 4600 rpm on a HX40 16cm2 housing variant on a 9:1 84x89 LS/Vtec

rat city rex

I have a 7 blade hx35 and Im using a splog manifold.

sosxbmx

yeah i have an undivided drag log manifold, and my hx35 housing is divided, yes my tune is fairly conservative atm, mmmm looks like i need to put some more easy miles on this for break in and then off to the tuner for a good tune. anyone using an aftermarket .63 ar exhaust housing on their hx35/40 hybrids? i found one the other day and was kinda considering it, anyone have any thoughts?

EsotericImage

iTrader: (8)

im just kicking myself for not researching these further..

now im in the market for a new snail since mine is running out of breath..

but after some research, the friggin map looks great for my set up

rat city rex

You need to turn the boost up....lol This is what mine looks like once I lay my numbers on it.




These holsets dont even really come alive until after 15lbs, and even then they really start to get down once you get over the 20+ lbs of boost.

scottdh20

damn....

fyi anyone who has a choice make it....twin scroll reallly wakes these things up, its spooling much faster than my ramhorn, power seems to roll in smoother too

my new manifold consists of 1.25 piping for maximum velocity, paired 1/4 and 2/3 running two wastegates with 16psi springs and the best part......turbo placement

extremeracer

You have the right setup ;-)

90% of Holset users forget that the turbine housing is sometimes twice the size of what you'd normally run in Garrett/Turbonetics/Precision terms

So you have to design your setup to work with this (and take advantage thereof)

rat city rex

So I was thinking about it the divided manifold bit, And I remembered that I swapped hot sides with a friend that was making a twin scroll mani for his hx35. And that the one I got in return was a ported housing.

So divider on the exhaust inlet was cut down about 1" from the inlet and smoothed to a sharp edge for the divider. Might be why I see good boost so early with a splog manifold. I should have taken pics of it b4 I put it on for everyone to see.

EsotericImage

iTrader: (8)

your pushing way out of the efficiency zone and just pumping hot air. as long as you stay on the island, even at a lower psi, im still in the efficiency zone

scottdh20

man i hit like 10-15psi in first gear yesterday....twin scroll ftmfw!!!!!

and that wasnt even trying, i just went like you would from a red light, and i didnt even rev it all the way out....and this is on a 7.5:1 compression motor...i never got into boost in first last year unless i was launching the car

rat city rex

So this is just on paper that it shows Im just pumping hot air. If I was pumping so much hot air then my iats would be up there pretty good. Seeing as how they were below 105* after 7 4th gear pulls in less than 20 min (ambient temp was 85*), I would say its not really just pumping hot air.

EsotericImage

iTrader: (8)

alright

.. that calculator is just a ballpark anyways..

1999EK9Vtec

hey guys i just bought my first turbo setup off my boy, and it going into my jdm dc2
i really don't know that much about turbo first time ,hopefully i would put it in my car soon
motor and tranny
b18c1 stock motor and tranny just lsd with act 6puck
motor mod
apr, skunk2 intake with tb68 and AEM fuel rail
turbo
-GOSPEED TOP MOUNT CAST IRON MANIFOLD
-COMPLETE 2 1/2 PIPING WITH INTERCOOLER
-3 INCH DOWN PIPE TO VBAND
-HOLSET HX35W 7 blade
-1000RC INJECTORS
- tial wasgate 11 spring
it ecu either gonna be hondata or neptune don't know yet
oh and yes 3in straight pipe with hi power muffler
hopefully i should be around 300
here a pic on my boy car

sosxbmx

what kinda cams is everyone running?

hardcore97

i will be running pro1's in my build

1999EK9Vtec

at what rpm does the turbo start spooling?

red11secondcivic

Here is a video of my run using a 7 blade hx35g which has the 50mm wheel
My setup is
84mm sleeved lsvtec
9:1
itr cams
Open diff ls trans
e85.
I think it can go some 10.3 with more boost and fixing my fuel starvation problem when shifting gears.
http://www.youtube.com/watch?v=qxX5c...e_gdata_player

hardcore97

any idea how much power are you making? i was hoping i could get in the tens on my build, this gives me hope haha only difference is im stock bore and running a pretty nasty head with pro 1's and a gsr lsd trans

rat city rex

trapping 130 in a hatch................. I bet he's around 420+whp

red11secondcivic

Idk. I did some tuning on the two passes I made that night. Very conservative timing and 10.5-10.9 af at 20psi. I would say around 450to if I had to you my butt dyno.

wantboost

iTrader: (2)

im still debating on running my he351ve on my ls/vtec for giggles or putting it on one of my built sr's...
it'd be nice having 20psi or so by 4500

Schlitzjr

I run a D16 with an undivided ramhorn to an hx35 12cm housing to 3in full exhaust. 22psi at 5500 in third.

13g-crx

75.5 vitara motor
fj rods
Bisi 3.6 cam and springs
Home made twin scroll top mount
dual 38mm Tial gates
Edelbock performer X intake
BBK 70mm TB
1000cc Precision injectors on e85
Hopefully be tuned and on the road by mid july

JDM809

Hi everyone, i'm new to the whole holset scene. i didnt even get this turbo purposely honestly. i am putting together a side project for the street to have fun while i finish my sfwd car. its somewhat of a budget build with parts i had laying around. so i was on the market for a low cost turbo when a friend of mine at work mentioned i could use the same turbo's our aircraft pushbacks use.there t3 divided flange but they work once i welde off the integrated wastegate he told me. so sure enough spoke to our lead and got my hands on a rebuilt hx35w 7-blade. lets see how it performs. the build is as follows...

bottom end:
gsr block 81.5mm with supertech block guard
GE oil squirter block off
eagle rods
wiseco 10:1 pistons
acl bearings
new oem pumps

head:
b16 (stock ports)
supertech valves, springs, retainers, keepers, seals, guides
edelbrock victor-x manifold
skunk2 74mm throttle body
ID1000's

transmission:
jdm gsr with original lsd
competition stage 5 clutch setup

turbo:
Holset hx35w 7-blade
RLD Fab top-mount or ram-horn (havent decided yet nor have i contacted RLD, but most likely will be a top-mount)
tial 44mm wastegate
tial 50mm bov
ebay intercooler
ebay piping

plan on tuning on EcTune with e85.
currently all i have is gsr cams laying around. hopefully ill find some itr/ctr or some blox somewhere.

looking to make 450-520...

See_5

iTrader: (1)

Recently picked up a Holset h1c. Its in awesome condition. The exhaust housing is 16cm.Been through this whole thread and I have a few questions.

Im running a JDM GSR with GSR b17 cable trans rebuilt with synchros and mFactory lsd.

I dont mind a little lag if it helps with traction but im worried about spike. I just bought a PFab log.

My question is should i run the Holset 16cm^2 exhaust or look into a BEP .70 a/r. The car is usually used as a weekend warrior and occasional 1/4 track car. I am also considering all other variables such as piping length, innercooler size, etc..

Im still a newb when it comes to all this.
Any input is appreciated, Thanks.