Opinions on the Holset HX40 Turbo

[sleepydsm]

I am kinda worried I'll buy a Holset and it will be a big POS. I am starting not to want to spend $1500 just on the turbo (FP 3065). I dont know what to do! The Holset from what I've read seems great! But thats the key;what I READ.

[MustGoFaster]

Follow the pack, lead the pack, or be a stray and get picked off by the wolves. Pick your poison. With just about every turbo out there someone has built a car that preforms to the best, average and worst of it's capability. Try and be one of the first two. :D

[JET]

I am kinda worried I'll buy a Holset and it will be a big POS. I am starting not to want to spend $1500 just on the turbo (FP 3065). I dont know what to do! The Holset from what I've read seems great! But thats the key;what I READ.

Get a SCM61BB and call it good.

[wheelhop]

Well, you have dynographs, logs, and videos. Other than actually running any turbo yourself, what other way do you have to make your decision.

The first video posted (http://www.mitsustyle.com/forums/showthread.php?p=270084#post270084) was of the bolton hx40 2.0L car going 11.08, 13 degrees peak timing, stock exhaust manifold, stock weight.

Hx35:

Here's now a second video. ford 2.3 guys are happy to get 90% VE with major head work and a very aggresive cam. It's safe to say that the 2valve ford 2.3 doesn't have the same advantages as the 4g63, even though it is .3 L larger, from my personal experience with my T-bird TC. Stock SMALL 12cm^2 turbine housing, each volute is the size of 6cm^2 14b volute. Divided runner manifold makes sure that each exhaust pulse only sees a 6cm^2 volute. 585hp @28psi on an engine dyno:

http://www.youtube.com/watch?v=Fv1-omYCb9c

Comparison logs (http://www.dsmtuners.com/forums/turbo-system-tech/274459-holset-turbos-part-3-a-14.html#post151442325) of my holset h1c (same turbine wheel as the hx35, 2mm smaller compressor inducer) vs. my small 16g to show the spool speed.

Add these to the dyno graphs and track results on tuners with the bolton hx35.

HX40:

Compilation video of the dyno session of the 653whp hx40 w/ .55 a/r housing. You also get a great view of how fast it spools on the street. Non-billet 60mm hx40:

http://www.youtube.com/watch?v=PMC2nPrbJvs

Datalogs of the hx40 (http://www.dsmlink.com/forums/showthread.php?t=30000) in the bep housing showing spool speed. Stock Block/Head/Intake mani, BC272, FP Race Mani, FP Intake, 3" DP w/ 3" Cutout, over 50lb/min at 26psi. 20psi by 3900rpms. You can easily see how it can flow 60ish lb/min at 35psi.

Add these to the dyno graphs and track results on tuners with the bolton hx40.

If you don't have dsmlink, here's the above log:

[4g63tcrazy]

WOW that thing spooled up quick! Much faster than I thought.. To me the hx40 with the .55 a/r housing sounds like the way to go!

[Halon]

What kind of boost are people able to hold to redline in these small internal gated bolt on housings?

[niterydr]

Follow the pack, lead the pack, or be a stray and get picked off by the wolves. Pick your poison. With just about every turbo out there someone has built a car that preforms to the best, average and worst of it's capability. Try and be one of the first two. :D

Well said!:mj:

[sleepydsm]

Get a SCM61BB and call it good.

They are priced right, but I don't think it'd spool up by 4k on my stockish 2L with 272s.

I was thinking about the HX35 with the "shitty BEP housing" but where can I get an HX40 with a billet compressor wheel?

[Halon]

I also thought I heard a rumor that the housings are getting hard to find as vendors are starting to run out. Might want to check into that.

[joesushi]

But dude it's awsome cause I say so.

Yes you are correct. But to be serious why are we still hassling wheelhop?

-These turbos are cheap because they have avoided the "STREET RACING" mark up!
-They will last. They are running on diesel trucks with hundreds of thousands of miles.
-thousands of people use them on their gas race cars, and just google for ten minutes and you will have the proof.
-It's hard to answer all these questions about spool and specifications because there are MANY combinations and new ones being made constantly.
-Would you like a variable geometry turbo on your dsm? talk to this dude. http://www.homemadeturbo.com/forum/index.php?topic=96770.0


I now have chosen my brand turbo for my build.