What would be the best Holset turbo for a B18b1/GSR tranny setup looking for 350-400whp for the street with decent spool time and possibly revving to 7500rpm. Also when the car see's the track the boost will be turned up so that must be factored in.

 

just get a normal garrett T3T4in like a 50,57,or 60 trim and .48 or .63hotsides for 550 or 600 or maybe less...........also depends on how much lag you want

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spoolin turbo s &raquo;</TD></TR><TR><TD CLASS="quote">just get a normal garrett T3T4in like a 50,57,or 60 trim and .48 or .63hotsides for 550 or 600 or maybe less...........also depends on how much lag you want </TD></TR></TABLE>

I was already planning on that until i started reading up on Holset turbos and checked on the pricing and for $350US for a nice turbo u cant really complain especially compared to $550-600US for a T3/T4.

Im thinking of an HX30 or HX35 but im not sure if those are too big for my application and if an HY35 would suit me better.

 

hx35

 

where did you find them that cheap?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sleepencivic &raquo;</TD></TR><TR><TD CLASS="quote">where did you find them that cheap?</TD></TR></TABLE>
b18bturbo, ebay, etc.

 

http://www.homemadeturbo.com/f...709.0

http://www.homemadeturbo.com/f...527.0

 

hx35 all the way, i have a spare one that needs a wheel, hint hint...

 

so reading through a few threads it seems to run a Holset ideally you need to change the manifold flange placement a bit so the compressor doesnt hit the block and if your running an HX model turbo ideally you would want to have 2 seperate collectors (1&4 and 2&3)?

Im planning on running atleast 15psi on my setup so will i need to run that type of manifold and will the HX35 be too big for my goals?

 

you dont need the seperate collectors

 

it won't be too big, the twin scroll (split mani) is ideal however many people grind some of it out so they can run a regular mani...but if you do use the true twin scroll mani your spool time will increase...clearence will depend on the manifold and the car you are putting it in...15psi with out the twin scroll will be scary...NO TRACTION 1st-2nd and into into 3rd I BET!

 

has anyone grinded down the divider completely or is that impossible to do? If i use a true twin scroll mani are you saying my spool time will go up (from 4500 to 5000) or go down (from 4500 to 4000)? Right now im stuck as far as manifolds but im thinking of a basic log manifold or a shorty style mani. The car is a 1998 dx coupe and im trying to retain A/c (no PS) and it has the B18b1 swapped into it. the reason im saying 15psi is what im thinking of running is because thats what im guessing ill need to reach 350-400whp for the street?

 

spool will go up if you take it out... leave
the split intact

 

it will be tough with a log to make it fit...no ac is a must and cold side on the drive side

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sleepencivic &raquo;</TD></TR><TR><TD CLASS="quote">spool will go up if you take it out... leave
the split intact</TD></TR></TABLE>

i guess i worded that wrong, sleepencivic said it...your spool will happen quicker...that turbo will get you the numbers you want, i would not focus in the psi numbers specifally though...keeping the a/c might be hard though...

 

hmmm i really wanna keep the A/c cause its only driven in the spring/summer/fall months and once the snow hits she goes away in hibernation. If im gonna lose my A/C than id really like to run a nice Topmount manifold or something similar to showoff the turbo so its kind of a 2-way street because i can go T3/T4 57 trim with a log manifold and keep A/C or lose A/C and go Holset with like a nice top mount. Damn decisions decisions.

 

hahaha lmao on this one...def this thread would have been better off in the holset post thread...but ill rant on...

the hx30 would be an ideal powerband for your b18b....but you want to put out decent numbers so id def stick w/ the hx35 or hy35....a 9cm turbine housing if you want a quick spool (i spool up a 12cm on a 1.8 ls/vtec by 5k w/ a stock exh or by 4k w/ open dp) so the 9 would be signifcantly sooner...id estimate somewhere in the 3700range open dp and 4500ish stock exh...

this turbo is capable of 5o+cfm/min its a big friggin turbo...

the divider tang can be ground out and will increase the a/r of the turbo...but allow for a slighty lease restrictive top end....

a split scroll manifold can be fab'd which will help in spoolin this huge firggin turbo...id shave off about 2-300 off full boost rpm....some say it helps alot...others like myself have stuck w/ a eq pressure manifold...and my car makes gobs of power....anything below 10psi is rather worthless w/ this turbo....hence a reason why it not good for a d-series....b16''s id def suggest the hy35...for the faster spool....but to hit your mark of 350-400 like myself.....15-16lbs will be your home...and id def switch back to that ls tranny if you had it...youll be grasping for traction!...get a decent 3" exh or e-cutout like myself and you willl love this turbo...did i forget to mention you can find them for about half what a t3 turbo goes for....in all coparision...its like a 60-1 w/ slighty better efficency

 

oh ya....good luck fittin the a/c compressor down there....im running a neukin ramhorn mani...and i had to cut my drivers side a/c mount in half! we ain't lying when we say this turbo is massive!!!

 

drumking what manifold do you run?

 

about 35lbs

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by scarlemthug &raquo;</TD></TR><TR><TD CLASS="quote">Im thinking of an HX30 or HX35 but im not sure if those are too big for my application and if an HY35 would suit me better.
</TD></TR></TABLE>

The hy35 and hx35 are very similar, the hx35 just has a bigger turbine housing and a less efficient compressor wheel. So the hx35 will have a higher boost threshold and not compress the air as efficiently. I don't know what engine management system you will be running, but if it doesn't offer traction control I would go with the hx35. But then if you are a good driver you might be able to get away with the hy35. Boost will be delayed a little bit with the hx35 so you will have an easier time hooking up. I went with the hy35 because, well becuase the damn thing was FREE! If I would have known then what I know now and had to make a decision, I would go with the hy35 only because the ems I have has the traction control option.

You would be best advised to learn to read compressor maps somewhat so you can understand a little about how different compressors react to different scenarios (then you can be like me, cause I understand VERY little of this). Check the faq's on the top of the f/i forum and read about comp maps. Then hit me up and me or one of the guys in the holset forum will shoot you those maps, so you can make an informed decision.

You will be able to make 400whp (though this is very tune and octane dependant) with either, remember these things love higher pressure ratios so keep the compression ratio of your engine lower than 10. Prolly 9-9.5 would b the best. GL. Check out the holset thread and post your questions in there if you are set on getting one (a holset that is). Hoped that helped some.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drumking15 &raquo;</TD></TR><TR><TD CLASS="quote">this turbo is capable of 5o+cfm/min its a big friggin turbo...</TD></TR></TABLE>

I assume you meant lbs/min.

The hy35 compressor will do 52.5lb/min @ a pr = 3.3 and be @ 70% efficiency. Overall it seems like a really good turbo.

 

thanks for all the replies guys, im really starting to think that this would be an ideal turbo for me and would help my budget. I still dunno if im ready to give up A/C but if your driving with the windows down its not so bad i guess.

As for the rest of my setup it will look something like this.
-manifold (log, shorty or top mount???)
-full 3" turbo back exhaust
-2.5" ic piping
-8" JRC intercooler
-750cc injectors
-Neptune
-tial 38mm
-tial BOV

etc etc.

I dont have the LS tranny left over as the swap came with the GSR so ill prolly end up keeping it and if anything swap to an LS 5th gear for highway fuel economy.

So would i be better off with an HY35 or an HX35? will the HY35 push 450-500whp?

 

kg/min what?


ok ok Move along folks, nothing to see here. Take it back to the Holset thread.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Si Shane &raquo;</TD></TR><TR><TD CLASS="quote">kg/min what?</TD></TR></TABLE>

Huh??