Faster spool than a Holset?

[rarson]

Higher compression has been known to increase exhaust heat slightly. And higher heat affects spool greatly since the amount of work done on the turbine is a function of exhaust temp.

But exhaust gas heat is going to be affected by the air/fuel ratio, timing, etc. If you've optimized fuel and timing for the particular setup using the same tuning methodology, I doubt you'll see much difference in exhaust temps. Even if optimal tuning for two different compression ratios didn't negate the difference, I doubt the extra heat generated from an extra point or two of compression is going to make a discernible difference.

You will, however, notice the improvement in off-boost response, which will still make the car reach boost in a shorter period of time.

 

[jm1080]

Yes I'm on a 7 blade with T3 housing, my fault I should have said that. I don't have dsm link, best thing I can do is a video...I need link

Videos good proof too

By the way, how are you tuning if no link? Link is like the most important .

 

[big_d]

Looks like he is tuning with maft gen2. It's pretty much a glorified safc. Before you jump straight to link V8killerturbo4, check out dsmap

 

[standard235]

Looks like he is tuning with maft gen2. It's pretty much a glorified safc. Before you jump straight to link V8killerturbo4, check out dsmap

Another vote for DS-MAP/Jackal.

Super easy to work with. Awesome guys to help with problems.

And they don't just fix stuff with clamps and sliders and checkboxes.

 

[dsm-onster]

And they don't just fix stuff with clamps and sliders and checkboxes.

Please don't start with the misinformation . . .

 

[JusMX141]

will probably try out the hx35 7 blade in bep housing, prices are getting steep on these turbos though.

Doesn't that tell you something? When has demand ever driven the price of a certain turbo upward?

You can't dent that an Evo III 16G is the most popular DSM turbo out there, and it's price has been on a steady decline even though guys are still buying the shit out of them.

And they don't just fix stuff with clamps and sliders and checkboxes.

I'll be sure to let Curt Brown know that his ECMLink is holding him back on his current setup.

 

[untouchablecc]

I'll be sure to let Curt Brown know that his ECMLink is holding him back on his current setup.

Hahaha Yeah i never should of bought the damn thing, worst mod ever

 

[TSimage]

Oh no... Another Holset thread turned into a benchracing VTec fest..

 

[viperlp01]

I see over 20 psi before 4k.... More like 3700.. It does hit hard.. Hard enough on a rainy day that i will loose traction in second.. Im not putting out huge numbers but going from a 16g to this was discouraging at first because you don't hit instant boost but the numbers don't lie.. My 70-90 was way faster, I had more lb/min at a lower boost level, and I didn't have to worry about knock as much... and sitting in my buddies car with a 16g then getting back into mine you can tell night and day.. The holsets are crazy man.. In kalamazoo we have like 5 dsms cruizing around with holsets from the 8 blade hx35 to the hx40 pro.. We will have alot of data to bring to the table when the track opens and the weather gets nice..

I havent touched my laptop in like 2 months.. I hate this weather and I don't even try to make my tune any better which I should but with literally a maf comp and boost est match with my fuel set to match my 850s and I think I took away 1 degree from 4.5k up I haven't seen knock at boost levels around 24psi... My Wideband was damaged due to the ice on the road but I set my CEL to knock at 1 degree and I havent made it light up yet.. The 16g I had to take away like 3 degrees.

 

[Cassera]

Oh no... Another Holset thread turned into a benchracing VTec fest..

Ya know what, than let us benchrace, obviouslly you waste your time reading everything that was said. Next time you start a thread about ANYTHING besides parts you already have in your car, im gonna call you a benchracer.

 

[jm1080]

I see over 20 psi before 4k.... More like 3700.. It does hit hard.. Hard enough on a rainy day that i will loose traction in second.. Im not putting out huge numbers but going from a 16g to this was discouraging at first because you don't hit instant boost but the numbers don't lie.. My 70-90 was way faster, I had more lb/min at a lower boost level, and I didn't have to worry about knock as much... and sitting in my buddies car with a 16g then getting back into mine you can tell night and day.. The holsets are crazy man.. In kalamazoo we have like 5 dsms cruizing around with holsets from the 8 blade hx35 to the hx40 pro.. We will have alot of data to bring to the table when the track opens and the weather gets nice..

I havent touched my laptop in like 2 months.. I hate this weather and I don't even try to make my tune any better which I should but with literally a maf comp and boost est match with my fuel set to match my 850s and I think I took away 1 degree from 4.5k up I haven't seen knock at boost levels around 24psi... My Wideband was damaged due to the ice on the road but I set my CEL to knock at 1 degree and I havent made it light up yet.. The 16g I had to take away like 3 degrees.

Yea the 16g is no fun on pump, but on e85 it is a night and day difference as well. What are your 70-90 times on hx35? If you have any 3rd gear log as well to show the numbers, it would be great! But yea I might try one of these 8 blade or 7 blade ones, I do love their sound though, sounds much better than a 16g .

 

[dsm-onster]

Yup....This thread is clean tho...no arguing like it should be. The less you argue the more information gets put out there.

Oh no... Another Holset thread turned into a benchracing VTec fest..

Ya know what, than let us benchrace, obviouslly you waste your time reading everything that was said. Next time you start a thread about ANYTHING besides parts you already have in your car, im gonna call you a benchracer.

Bah, you jinxed the thread, Joey.

Still looking for advice for your 1000whp build, "image"? . . .

And, bench racing, "image"?

You must be logged in to view this image or video.

. . . Knowing the denotation of basic internet lingo certainly should be foremost on your plate when researching on the internet concerning how to build an 1000whp I4.

 

[dsm-onster]

I see over 20 psi before 4k.... More like 3700.. It does hit hard.. Hard enough on a rainy day that i will loose traction in second.. Im not putting out huge numbers but going from a 16g to this was discouraging at first because you don't hit instant boost but the numbers don't lie.. My 70-90 was way faster, I had more lb/min at a lower boost level, and I didn't have to worry about knock as much... and sitting in my buddies car with a 16g then getting back into mine you can tell night and day.. The holsets are crazy man.. In kalamazoo we have like 5 dsms cruizing around with holsets from the 8 blade hx35 to the hx40 pro.. We will have alot of data to bring to the table when the track opens and the weather gets nice..

I havent touched my laptop in like 2 months.. I hate this weather and I don't even try to make my tune any better which I should but with literally a maf comp and boost est match with my fuel set to match my 850s and I think I took away 1 degree from 4.5k up I haven't seen knock at boost levels around 24psi... My Wideband was damaged due to the ice on the road but I set my CEL to knock at 1 degree and I havent made it light up yet.. The 16g I had to take away like 3 degrees.

Yep. By 5Krpms, I logged 2lb/min more airflow at 2psi lower boost than my 16g. The 16g was only seeing 36lb/min with a stockish long block and at 22psi. So the 16g was certainly not tapped out. My 70-90 time dropped to 2.1sec from 2.4sec. This was a direct swap same manifolds same cams same exhaust and intake everything except for the 4" adapter to connect the intake to the h1c compressor inlet and an adapter for the outlet to the intercooler piping.

 

[viperlp01]

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I got a new phone so I was messing with it and decided to do a 5th gear 70 mph highway pull.. This is from what 3.2k maybe?? The boost comes on pretty quick.. I can take some more videos tomorrow along with some logs.. Im taking my laptop with me to school so I will tune alittle

 

[1gDSM4g63]

...5th gear 70 mph highway pull.. This is from what 3.2k maybe??

Who cares, that's in fifth gear. It will boost even faster if you do it in third or fourth gear or if you brake boost!

 

[viperlp01]

Dude are you serious.. Im showing it takes practically nothing to make this turbo spool.. Did you read I said Im going to make more videos tomorrow?? I dont know if your trying to be a dick or what but this was pretty much a test to see how my phone make videos and how it was to upload them...

I was suprised when I watched the video.. I didn't think it spooled that fast from cruising..

 

[1gDSM4g63]

Yet again, I'll say the exact same thing. Who cares, you're doing it in fifth gear. My HX52 probably won't be that much off spooling in fifth gear either.

If the OP wanted to he could have spools even faster in fourth gear. I think the OP was asking it how fast will it spool from a stop.

 

[jm1080]

thanks for vid, but how much boost was that at?

Also when you get the chance can you do a 3rd gear pull or like from a stop just to compare?

Definitely post a log when you tune! That is what I really would like to see

 

[viperlp01]

Ok i did a log but Im only showing like 40lbs/min at like 23 psi.. Thats what it is at right now.. I will post the videos and log around 5ish... I am going to tune it alittle better and get the maf comp right..

 

[jm1080]

That not too bad, I just checked my 16g log on regular pump gas at 20psi, I was getting 36lbs/min, can't wait to see your log and vid!

 

[viperlp01]

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That is 21 psi and from about 3k to redline and then shifting into 4th to see how fast the boost comes back.. My logs are here...

So it is only 21 psi and dont pay attention to the WB readings.. Like i said I ruined my wideband this winter..

P.S. sorry for the led zeppelin.. I like hip hop and rap and then theres led zeppelin

 

[dsm-onster]

Isn't it hard to get a good video of how fast she spools? The hx35 spool stoo fast. You really need to have a handle on your torque steer.

The main component is that the spool is that fast yet you're seeing 40lb/min at 21psi with the stock intake manifold!!!!

 

[viperlp01]

Ya i have a line on that magnus SMIM that is in the marketplace.. hopefully I get that for cheap and get some cams... Im debating on taking a couple bucks on a student loan to rebuild this motor.. Its getting old and its hard to make money when your in school full time..

 

[dsm-onster]

You know that the wh1c has older tech than the hx35 in the turbine wheel. It has square turbine tips instead of rounded. And different thickness in the blades for a different laminar flow pattern. Still seams to do VERY good. . . The wh1c was designed in 1991-1992 and used in the cummins pickup in 1994. This was when the 1g was still in heavy production .

 

[viperlp01]

Ya this is off a 94... It is old as balls and has never been rebuilt to my knowledge.. Has a little side to side play but thats it...