ross

Has anyone used a Holset 35 on their Miata? Or any thoughts on installing it on a 1.6.

zoom2zoom

iTrader: (5)

someone tell this kid how dumb he is so I don't have to!! do you have any clue AT ALL about how engine size and turbo size correlate? ok, deep breath....

Braineack

iTrader: (62)

what are you talking about?!




In all honesty, the Holset 35XXX is probably comparable to the 3076. So if you're looking for that 2000RPM bandwidth making killer torque, then power to you brah! Depending on the turbine housing and where you sourced it, it may never spool...it really depends, but Holset makes very efficient turbos if you can size them right.

Splitime

iTrader: (24)

Pictured turbo is either a HY35w or an HE351CW.... both have smaller hotside housings than the HX35....

I wouldn't put an hx35 on a miata motor. I would however... try the HY or HE on a built one....

urgaynknowit

iTrader: (5)

nothing new here in new england,

my cousin is doing it to an mr2, it already runs and drives
first pass on the dyno it put down somthing like 330 at the wheels




my friend johns celica





both of these cars are aiming at somthing like 500 whp

Braineack

iTrader: (62)

yeah it was a HE351CW

ross

Well for the record I'm not a kid. And yes I'm new to this forum but I'm not entirely clueless. Thanks to all the other members who responded. (Et tu Brute)

ripracer

iTrader: (4)

holset also makes a hx30 that might be more suitable for a 1.8, i think the hx series goes as small as 25.

ripracer

iTrader: (4)

I think this would make for a sweet bottom mount setup and good power. Should spool well
Turbocharger SR20DET SILVIA S14 S15 TD05H-18G Turbo - eBay (item 270306228589 end time Dec-20-08 23:47:29 PST)

Though I guess the deal here would be looking for a turbo with a $300 or so price tag, greddy 18g t2 flanged turbos can be had for $200-$400

ross

I haven't got it in my hands yet I have to make a trip to go get it. But if it turns out to be on the large size I'll hang on to it anyway. The price is right.

BoostedR

iTrader: (1)

I'm thinking of running a HX35 on a 1.8 plenty of honda guys with 1.6 and 1.8 liters are running them and countless DSM guys Holset Turbos, RESULTS ONLY (COMPLETE INSTALLED SYSTEMS) - DSM Forums. The turbos spool a lot faster than you guys think. You want high horse power number for cheap holset and Borg Warner are your best friends.

Saml01

iTrader: (9)

^ Remember one thing. Powerband, civics have like 2000 more useable RPM's so if the turbo spools by 4k, its ok. For us, if it spool buy 4k, its useless.

neogenesis2004

iTrader: (12)

Also, those motors have a higher NA VE so they spool those turbos sooner anyway.

wildfire0310

iTrader: (1)

That and DSMs are 2.0, 2.3 or 2.4L and even on the 2L the Holset are late boost building.

Not to say it can't be done but don't expect to be building boost to at 3K and full boost by 4k. But still I like to see someone do it just so it be said was done.

DontPassTheFence

I was about to say, the 1.6 OR the 1.8 dont flow nearly as well as the mitsu 4g63 OR the honda b18 motors, sorry.

adjemin

+1 on experimenting with the 30 size. I've seen favorable reports on Turboford several years ago with the 2.3 and the HY35 (smaller ex. housing than the HX) having decent spool and big power potential--someone tried a 30 (HY or HX--don't remember) and the power peaked at something like 4500. With the Holset's ability to maintain efficiency at boost levels over 20 psi, I've been curious how well the H-30 would perform on a 1.8 or 1.6--plus they don't drain one's wallet to the tune of 1K for the turbo alone.

BTW, while the Honda heads are clearly superior to the Miata's, the Miata's is certainly closer to the Honda's than that of the Ford 2.3, dating to something like 1970 with it's single-cam 2-valve technology

I'd say go for it and let us know how it goes.

neogenesis2004

iTrader: (12)

Without having flow charts of said 2.3 I'd say your claim is baseless. Also not forgetting the fact that said 2.3 has a full 0.5 L more displacement than the largest miata motor. That is a very significant player in spooling these large turbos.

BoostedR

iTrader: (1)

1k I can buy like 7 holset for that much I have 2 sitting in my room I paid $140 for the HX35 and $90 for a 351. I originally bought the turbo's for my type R integra but since I'm trading it for the a miata I will use the turbo on the miata. The Honda does have a advantage of being able to rev to 9200 like it's nothing but I think I can make it work I have seen ls which only revs to 7500 make good number with them. If I want to make 350+ horse power I have to use a decent size turbo.

adjemin

Neogenesis2004, with all due respect, my claim of the HY35 "working" for some people on the Ford 2.3 is not baseless--it's based on similar DIY'ers trying different things and finding "what works", and finding that this particular turbo had decent spool with good (even awesome) power potential for a given powerplant. This trial-and-error approach is definitely not a scientific approach, in regards to people doing things like finding (and understanding) compressor maps, making flow calculations of their motors based on such basic assumptions (much less measurements) as BFSC--it's people trying this and that, which is the nexus of the most basic DIY'ers principals, which basically states that "we'll try it until it blows up, and if it does, we'll try something else" (see homemadeturbo, among other sources, plus the entire history of hotrodding). And, before too long (usually), people end up finding a workable fitment that suits their needs, however unmathmatical or unscientific--not that I'm against this stuff, but sometimes the math and the science don't work like expected, and we look to what works by looking to what people have already done.

So, based on what I've seen in regards to how well a Holset HY35 performs on an "ancient" design like the Ford 2.3, I'm especially curious to see how an efficient turbo like the HX-30 (not the much larger HX- or HY-35) performs at high boost on a Miata motor. Quite frankly, I'm surprised no one has tried a Holset yet (that I know of), as they are known to be most efficient at higher (20psi+) levels.

So, to the OP, I say try a Holset 30 and see what happens...you just might turn us onto a whole 'nother DIY thing....

samnavy

iTrader: (7)

Here's how you do it:

1: PICK A POWER GOAL!
2: SET A BUDGET!
3: ASSESS YOUR SKILLZ!
Ensure that 1-2-3 are compatible, if not, revise until all are in line, then spreadsheet a build plan.
4: BUY PARTS!

Guys who start out "Will this turbo work on a Miata" are starting at the end of the problem. "Will this $150 turbo that will make 350whp I got from a buddy work after I spend $1500 on a custom DP and Manifold and $6k on a built motor?" It's ******* backwards guys!!! Buying parts should be the last thing you do, not the first... and starting a build around one part that happens to be lying around the house that's the cheapest thing in the whole equation is a recipe for disappointment.

Ross, not picking on you, but the BP motor is nothing like the 4G63 and B/D/H series Honda motors you might be used to... whole different animal. The majority of this board is partial to Garrett turbos, flanged in T2 and T3 because the major Miata turbo-centric companies use them. Going custom will get any size turbo you want to work as long as it will fit between the block/fender/crossmember/hood... but spooling anything larger than a GT2860 on a 1.6BP motor is nothing I would like to hit an onramp with.

If you gave us a general idea of what you had in mind for your Miata, maybe we could suggest a route to research. Do you have goals, a budget, some skillz???