The World of Holset Turbo Charging

[Biggamehit]

yeaup... i am picking up the ams full forged rebuilt kit in a matter of weeks.. so when i get home its waiting for me... KA number 3 is all taken apart and waiting for me. but from the beginning until now, i have been completely stock. everything is running smoothly for me..

[Reno]

Excellent who wants dibbs on the new ZR1? or R35 hehe

a race i mean :P

Biggamehit you know u want to hehe

[Biggamehit]

hahaha only if it was on a road racing course and still my car is not up to the challenge of that lol... the only way i would beat it is if the driver sucked.... i pride myself on having more skill than power however.

[hannibal]

Great contribution biggame!!!

[boker240]

excuse me , but take a look see at dis.

[WDRacing]

What happened to the strut tower...lol?

[Biggamehit]

looks like someone was running Mega Booost LOL... wow... and or they going to run the piping over the tire

[tad_07]

+1

i could believe 300 but for 370whp i need some proof.

i'm pretty sure efeezi got 400 or 450hp on a h1c at either 14or 16psi i cant remeber and not hunting for the thread and yes he had a dyno to back it up, but thats been atleast 1.5-2 yrs ago.

[WDRacing]

i'm pretty sure efeezi got 400 or 450hp on a h1c at either 14or 16psi i cant remeber and not hunting for the thread and yes he had a dyno to back it up, but thats been atleast 1.5-2 yrs ago.

Noway, unless it was a motor run on a dyno by itself. The turbo does matter as far as size is concerned. But the Holset compressor isn't going to magically make more power then the garret compressor. The exhaust housing is a tad different, the internals are a tad different, but that's it. If Holset could make more power, EVERYONE would use it.

The average for a decent tune and well matched turbo is 10whp per psi of boost.

WD

[nelson8708]

[quote=""efeezi""]Went to the dyno today and found the limit of the H1C. 15psi hit 392, cranked it up to 25psi and only made 411 but had a ****load more torque. Torque started early and carried pretty far, it almost feels V8'ish. This is also with a 50/50 mix of E85 and 91 piss. [/quote]A little e85 / gas mixed must of helped. I didnt say it couldn't be done....i said i wanted proof.

[WDRacing]

Are we using regular pump gas or anything we want. Cause if the timing is ramped up and it's using alcohol for fuel, then that's not the turbo making the power, it's all tuning.

Admittedly though, if that is only on 15 psi, then 392 is a boat load of power.

[boker240]

Noway, unless it was a motor run on a dyno by itself. The turbo does matter as far as size is concerned. But the Holset compressor isn't going to magically make more power then the garret compressor. The exhaust housing is a tad different, the internals are a tad different, but that's it. If Holset could make more power, EVERYONE would use it.

The average for a decent tune and well matched turbo is 10whp per psi of boost.

WD

i heard from a reputable source that per lb. of boost increases hp's by 7% of what ur motor is n/a. so that would meen that the ka per lb. of boost would b around 10-11 hp's.check this out.

How it works:In order to understand how this calculator works, it is helpful to understand the basics of supercharger technology and why superchargers make more power (check out our tech section for more on info). A rough starting estimate to calculate HP gain is to take boost (say 5psi) and multiply it by 7% (a constant) to get your approximate power gain (in our example 35%). Why 7%? Because 7% is approximately how much more air and fuel gets into the motor with each pound of boost that is added. To get a more exact figure, take 1psi boost and divide by normal atmospheric pressure, 14.7psi at sea level. 1 divided by 14.7 equals 6.802%. Under ideal conditions, you can expect to burn 6.802% more fuel and air per pound of boost. This is the starting point for this calculator, however, as boost rises above 5psi, other inefficiencies kick in, so gains above 5psi become progessively less effective in making more power. When you need to retard your ignition timing, which is often necessary when running a supercharged engine to avoid detonation, other timing inefficiencies kick in. This is factored into the "HP Loss due to timing adjustment", which is an estimate as to the amount of ignition retard that will be required at a given level of boost. To offset these losses, you can run a higher octane fuel or an intercooler, both of which increase your detonation threshhold and allow you to run more boost without experiencing detonation. For more on detonation, check out "Detonation, Knock, and Pre-Ignition 101".

oh and by the way everyone has been askin bout the strut tower, and that was some stupid noob **** that i did before i knew how to clock a turbo,i just hacked that ****,hopefully i can weld that **** up and fix it back close to normal.

[boker240]

well its done . 3rd ka-t set up. let me know what ya'll think , couple issues but ill workm out , and a little laggy but ohwell ,hits like a train at 10 psi.

[sr20deTsomeday118]

freakin awesome, def considering. Kinda just getting into turbo setups...all i can say is search=godly and this was a big help! relatively cheap easy turbos ftmfw
Modified by sr20deTsomeday118 at 12:04 PM 2/3/2008

[GTR PrYdE]

VTA ?!

What turbo model?

[Reno]

looks like an HX40 with a bullseye housing

[nelson8708]

looks like a hx35w to me.

[Biggamehit]

loh and by the way everyone has been askin bout the strut tower, and that was some stupid noob **** that i did before i knew how to clock a turbo,i just hacked that ****,hopefully i can weld that **** up and fix it back close to normal.

haha dude.. i was thinking that was the issue when i first seen it... but when i seen the rest of the bay.. im like man he looks like he knows whats going on..

then im like ****, did he blow chunks out of the outlet, then i seen that your compressor shaft was still inplace..

looks good bro..

[nelson8708]

well its done . 3rd ka-t set up. let me know what ya'll think , couple issues but ill workm out , and a little laggy but ohwell ,hits like a train at 10 psi.

looks good. At what rpm do you hit 10psi?

[sr20deTsomeday118]

sorry about the threadjack but..

im looking into these and being that im new at turbo aps i have no idea how to tell which turbo meets with which manifold

[WDRacing]

Don't thread jack, make a new thread and ask your question. But befoe you do, read the FAQ and the artile I wrote about boosting a stock KA.

WD

[boker240]

well i hit boost late as fuk!!!! 4000 rpm ,it soundsgood and hits hard but way too late, i pmed u biggamehit from ur thread on ka-t.org and ask if u had a hy housing i could get???hope u look at it or this!!!!it is a hx35 for whoever was asking ,sorry i dont come over here that often. i worked reral hard on it ,the 5 speed is comn soon and i better get some good times out of this thing or i dont know what ima do

[Biggamehit]

no sir i dont have any housings.. try the link in my post... im in iraq by the way bro

[sunnys14]

What manifold do you Holset guys run?

Any clearance with the master cylinder with ABS?

Just paid a deposit for a ETD manifold and was looking into a HX35. Just wanted to see if there was any clearance or fitment issues.

[efeezie]

Are we using regular pump gas or anything we want. Cause if the timing is ramped up and it's using alcohol for fuel, then that's not the turbo making the power, it's all tuning.

Admittedly though, if that is only on 15 psi, then 392 is a boat load of power.

Yeah that was my car with the H1C. There were no abnormal timing changes at that time. The car just flat out made efficient power with that turbo. I believe I had stg 2 BC cams and custom intake at the time. And I was running a 50/50 E85/ 91 piss mix. The 392whp was on a 1 bar spring only, the boost controller wasnt even hooked up for that run.

[srblacks131]

This is my H1C on the car I just recently sold. Standard T3 ebay manifold. 16cm non-gated exhaust housing. Hit 25 lbs of boost at about 4800rpm. Miss the car

[BoostFab]

This is my H1C on the car I just recently sold. Standard T3 ebay manifold. 16cm non-gated exhaust housing. Hit 25 lbs of boost at about 4800rpm. Miss the car

that's huge, it probably stand still at idle. must be slaming you back violently when it hit.

[Ballboygordon]

Definitely interested in this. It would be a good idea to sticky this methinks.

[240sk]

hey i gonna go with the holset set up but with the holset turbo do you have to make custom downpipe and fmic pipes. would the sr20 douwnpipe work? and wht manifolds do yall use? thanks

[Biggamehit]

sorry i didn't see this on the 11th. but as explained bigger holset may require some cutting and pasting

they are not direct bolt up turbos. you will have to make your own dump.... if you don't have a welder.. you can still get some mandrel bends once you have the turbo mounted and mock up a dump/down pipe... mark it tape it and take it to a local shop and have it welded.