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HTA GT35R Dyno results right here!

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Old Oct 7, 2007 | 05:57 PM
  #46  
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From: Nashville Metro
Originally Posted by scorke
If I dynoed my car on a DD dyno it would be the same shape as yours, it just wouldnt climb as high.

I had a 30R too, I think the 35R feels slower honestly. To me the place you feel the difference between the 30R and 35R is 4-7k in 3rd gear and higher. If you were to tip in to the throttle below 4k in a 30R vs the 35R I would have to assume that if both cars were going equal speeds it would take a good few seconds or a gear or two for the 35R to catch up.

My 30r was gone more than 2 weeks, about 3-4 months ago but I know what your saying,I completely agree with how similar it feels to the 30R, however I think you and I both forget exactly how much low end/mid range tq we gave up for the higher numbers up top.

Great numbers btw, car must haulllll ***!

Scorke
Thanks man. I think spool up of the HTA is all the difference. I think you'd have to get your 35R to FP and get it HTA'd to see what I mean about spool and feel
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Old Oct 7, 2007 | 06:06 PM
  #47  
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Originally Posted by bigric09
the curve should not change from dyno to dyno.... peak numbers sure... but curve should be the same to so similar that it doesnt matter
This isn't accurate. Different dynos load the car differently effecting both spool time and the shape of the curve.
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Old Oct 7, 2007 | 06:23 PM
  #48  
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From: NO
Good job catching me in a reading FUBAR. I didn't even catch that they were using a
.82 housing.
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Old Oct 7, 2007 | 06:29 PM
  #49  
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From: Spec-Ops Motorsports, Fayetteville, NC
Originally Posted by robertrinaustin
This isn't accurate. Different dynos load the car differently effecting both spool time and the shape of the curve.
you'd have to show me graphs... ive been on two different dynos with my car and both curves were almost exactly the same.... i was just 10hp higher than the other.

Mustang to Dyno Jet

notice i didnt say exactly the same, but the curve would be similar. You arent going to spool up 500 rpm's sooner or later from one dyno to another.... if so, i havent seen a chart yet to prove that. There may be 200 rpm difference or something in that ballpark. The only numbers that seem to really change are peak numbers and then the numbers as they carry through the graph, but the curve is always similar
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Old Oct 7, 2007 | 06:30 PM
  #50  
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From: Nj
Originally Posted by LT1runner
Thanks man. I think spool up of the HTA is all the difference. I think you'd have to get your 35R to FP and get it HTA'd to see what I mean about spool and feel
I might just have to do that The gains up top honestly would be worth it alone. For another 40-60whp on pump over my current setup I would be ecstatic, even with no gain in spool.

If they really do help spool up that dramatically I might consider it

Scorke
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Old Oct 7, 2007 | 06:32 PM
  #51  
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From: Nj
Originally Posted by Jasil
Good job catching me in a reading FUBAR. I didn't even catch that they were using a
.82 housing.
It's cool No doubt its a killer turbo, a 35r in any variant is going to produce some killer numbers no matter what powerplant its bolted to, 4g63, EJ25, F22, B18....

Scorke
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Old Oct 7, 2007 | 06:35 PM
  #52  
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From: Nj
Originally Posted by LT1runner
I ran the.63 hotside because I had AMS' kit already. To continue to use it, I dropped the .63 housing on it to keep down time to a minimum, plus to avoid having to buy or alter the AMS kit. That kept more money in my pocket. That's what I needed because I have a Z-28 project as well. Cash goes quick with two projects.


If I already had a kit that used the four bolt pattern on the .82, then I would have kept that. So are you saying it would have spooled slower if I kept the .82, or it does spool slower due to the .63?

Remember full boost is nothing but a target boost setting to me. So full boost is 21psi on pump gas. So full boost(21psi) around 4000 would be slower than a standard 35R using a .63 hotside?
The .63 will spool quicker and produce more mid range up until about 5500-redline at which point the .82 will be more efficient.

I would imagine/assume that full boost (whatever it might be) would be hit later with a HTA 35R (.63/.82) than a regular 35R with a .63.

Going from a .82 to a .63 is usually just an increase in response down low and an increase in tq. The advantage of a .82 on a 35R comes up top, and at high boost levels.

The difference between a .82A/R 35R and a .63A/R 35R at full tilt is about 50-80 whp or so from what I have seen.

Scorke
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Old Oct 7, 2007 | 06:41 PM
  #53  
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From: Spec-Ops Motorsports, Fayetteville, NC
so what we need is a .725 hotside then
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Old Oct 7, 2007 | 06:43 PM
  #54  
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From: Nj
Originally Posted by bigric09
so what we need is a .725 hotside then
Hehe, I don't want to be that guy, but what would be probably the best all around (read: most dramatic increase in performance with the least amount of trade-offs {loss in low end whp/tq and spool}) would be one of these compressor wheels with a twin scroll manifold.

Or for costs sake a .725 hotside


Scorke
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Old Oct 7, 2007 | 07:40 PM
  #55  
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From: sc
AFR is perfect!
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Old Oct 7, 2007 | 08:10 PM
  #56  
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From: Work - New York, Alaska, Mexico or the Caribbean. -Home - Tx Hill Country
Originally Posted by bigric09
you'd have to show me graphs... ive been on two different dynos with my car and both curves were almost exactly the same.... i was just 10hp higher than the other.

Mustang to Dyno Jet

notice i didnt say exactly the same, but the curve would be similar. You arent going to spool up 500 rpm's sooner or later from one dyno to another.... if so, i havent seen a chart yet to prove that. There may be 200 rpm difference or something in that ballpark. The only numbers that seem to really change are peak numbers and then the numbers as they carry through the graph, but the curve is always similar
It's pretty basic, load dyno v. inertia dyno, Mustang/ DD v Dyno Jet. That's why you always get people commenting on how their car builds boost much better on the street than their DJ graph shows. It made 300 rpm difference on my car switching from a Mustang to a DJ and the curve was much flatter, obviously. For you, 200 - 300 rpm may not seem like much, but that is exactly what improvement we're talking about with the HTA.
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Old Oct 8, 2007 | 06:05 AM
  #57  
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From: Alabaster, AL
Originally Posted by scorke
I might just have to do that The gains up top honestly would be worth it alone. For another 40-60whp on pump over my current setup I would be ecstatic, even with no gain in spool.

If they really do help spool up that dramatically I might consider it

Scorke
I wonder if his "gains" over your standard GT35 are due mostly from his ported head? Assuming yours is still stock.
Buschur found peak power to be the same between the two variants of this turbo if I remember correctly, but the
mid range power was improved a good bit with the HTA.
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Old Oct 8, 2007 | 07:14 AM
  #58  
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Stop the press!

Buschur's HTA comparison was done comparing a .82 GT35R to a .82 HTA GT35R?

Wow I totally did not notice that. Hmmm, very strange considering like 95% of all Evo GT35R installs are .63 right?

Also, is this particular DynoDynamics corrected at all to read more like a DynoJet? What does a stock Evo 8 do on it? Why is it that all DynoDynamics sheets I see in the UK have info like intake temp, dyno mode, etc listed on the bottom but this doesn't?

Totally NOT doubting this car runs awesome... but for those interested in understanding what the HTA offers we need a lot of detail.

And just to be clear, this dyno sheet is of an HTA with .63 hotside, 2.3 stroker, ported head, and HKS 280 cams.
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Old Oct 8, 2007 | 07:24 AM
  #59  
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From: Nashville Metro
Originally Posted by crcain
Stop the press!

Buschur's HTA comparison was done comparing a .82 GT35R to a .82 HTA GT35R?

Wow I totally did not notice that. Hmmm, very strange considering like 95% of all Evo GT35R installs are .63 right?

Also, is this particular DynoDynamics corrected at all to read more like a DynoJet? What does a stock Evo 8 do on it? Why is it that all DynoDynamics sheets I see in the UK have info like intake temp, dyno mode, etc listed on the bottom but this doesn't?

Totally NOT doubting this car runs awesome... but for those interested in understanding what the HTA offers we need a lot of detail.

And just to be clear, this dyno sheet is of an HTA with .63 hotside, 2.3 stroker, ported head, and HKS 280 cams.
The mods you listed just about sums the car up. If you want, just call the shop that dynoed the car for any dyno questions you may have. The phone number is on the dyno sheet. Andrew (shop owner) is an awesome guy, and knows his stuff. I'm sure he can explain anything dealing with his dyno, and the evos that have dynoed there(which is alot). Hes messed with more evos than you can shake a stick at.
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Old Oct 8, 2007 | 12:51 PM
  #60  
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From: Nj
Originally Posted by Drifto
I wonder if his "gains" over your standard GT35 are due mostly from his ported head? Assuming yours is still stock.
Buschur found peak power to be the same between the two variants of this turbo if I remember correctly, but the
mid range power was improved a good bit with the HTA.
Not sure Walker, my head is still stock though, you are correct.

Scorke
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