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Old 05-30-2009, 07:43 PM   #1
ATXRex
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Default HTA68 + 2.0l + E85

Got my 02 WRX back from Revolutions Performance in Colorado Springs today. After going from stage 2 to this, is like night and day. The car is blast to drive, but still seems awesome for a DD.

Mod list:
FP HTA68 - port option
APS 3" catless turbo-back
STi uppipe
Blitz SUS intake(short ram)
TurboXS RBV
SSAC tmic
Modded injectors(830cc)
Walbro 255

I am told by Revolutions a stock 2.0l WRX puts down around 150whp on their dyno, and a 18g'd 2.0l with supporting mods puts down around 260whp. My mods, with the HTA68 put down 262whp and 243ft/lbs.
At first I was kind of disappointed by the numbers themselves, but this thing hauls.

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Last edited by ATXRex; 05-30-2009 at 08:38 PM.
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Old 05-30-2009, 07:51 PM   #2
All4bSpinnin
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dont be so concerned about numbers... like everyone will tell you, its all about the trap speed!

i remember a friend of mine was bummed out that his SRT-4 only did 260 on a very hot day... when he took it to the track he was trapping 110+ which means he was a 300ish whp car
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Old 05-30-2009, 09:41 PM   #3
ScooobaSeth
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whats with that HUGE dip in power around 5300rpm?



good numbers thou! what boost was this at?
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Old 05-30-2009, 09:46 PM   #4
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dyno dynamics read lower than anything BUt but how low

specially on E85

how much boost? If I were you I would be crying and looking for a new tuner. Try camtuning.com I think he is the most experience tuner in here with E85
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Old 05-30-2009, 10:27 PM   #5
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Yeah, thats a big big dip. Spools pretty late also.
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Old 05-30-2009, 11:02 PM   #6
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not impressed for the hype this turbo is bringing.
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Old 05-30-2009, 11:11 PM   #7
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Yeah the spool is whats killer, I dont see the "16g-like spool" everyone says this thing has...
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Old 05-30-2009, 11:22 PM   #8
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I bet the 262whp was with the 1.0cr on the DD....if you used a 1.2cr (which reads close to a dynojet) you would get 314.

I like the power it makes pass 7k
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Old 05-30-2009, 11:37 PM   #9
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the dip is just a boost oscillation, i dont see an ebcs or mbc in his mod list.

i bet this things picks up quite a bit of power with an external wastegate.....
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Old 05-31-2009, 12:24 AM   #10
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Quote:
Originally Posted by Paul View Post
I bet the 262whp was with the 1.0cr on the DD....if you used a 1.2cr (which reads close to a dynojet) you would get 314.

I like the power it makes pass 7k
DDs in CO are heartbreakers, had he dynoed at Mac or any other DJ shop here in CO, everyone would cumming themselves about a 325 whp HTA68 2.0L.
I think that Dyno is 1.15 CF and at 6000 ft.
As for the spool I think the curve is misleading, I dynoed on a Dyno just like that in Boulder, same CF, made 256whp on a small 16G, spool showed late just like that but I was hitting full boost by 36-3700 on the street.
Load ramping that doesn't match the road.
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Old 05-31-2009, 12:52 AM   #11
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Quote:
Originally Posted by godforbid67 View Post
Yeah, thats a big big dip. Spools pretty late also.
Quote:
Originally Posted by trex616 View Post
Yeah the spool is whats killer, I dont see the "16g-like spool" everyone says this thing has...
Dyno Dynamics are notorious for mis-representing spool up. They show the curves shifted way right for some reason. Good power but still on a DD dyno with E85 this should be higher. Trap speeds will help.
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Old 05-31-2009, 01:41 AM   #12
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All the original hype about this turbo seems to be absolutely true. Although maybe not exemplified here, 2 reputable tuners have had great experiences with this turbo. It spools like a stock vf and holds 20psi @ redline.

Even at elevation and on 1.0, something may be up here. Even on 1.2 CF and 314whp, thats still 10-15 whp short of a run of the mill stg 2 STi.
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Old 05-31-2009, 02:36 AM   #13
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Quote:
Originally Posted by ATXRex View Post
Got my 02 WRX back from Revolutions Performance in Colorado Springs today. After going from stage 2 to this, is like night and day. The car is blast to drive, but still seems awesome for a DD.

Mod list:
FP HTA68 - port option
APS 3" catless turbo-back
STi uppipe
Blitz SUS intake(short ram)
TurboXS RBV
SSAC tmic
Modded injectors(830cc)
Walbro 255

I am told by Revolutions a stock 2.0l WRX puts down around 150whp on their dyno, and a 18g'd 2.0l with supporting mods puts down around 260whp. My mods, with the HTA68 put down 262whp and 243ft/lbs.
At first I was kind of disappointed by the numbers themselves, but this thing hauls.

are the numbers so low because of were you live? sorry if this is a noobish thing to ask haha. i am stage 2 protuned and i put down 253 whp and 253 ftlbs torq..just trying to understand the numbers someone please help..
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Old 05-31-2009, 04:18 AM   #14
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i have to agree, i am happy that you are happy with this turbo, but i have contested from the begining that there is something off, yes it make decent power, but the spool on all the 2.0 i have seen is pretty bad, i have seen 20g's with that spool, but 50+whp more
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Old 05-31-2009, 07:40 AM   #15
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Wow I'm surprised the spool isn't better, especially with E85. For comparison here is my dyno plot from same type dyno, CF, and altitude. It's the other Dyno Dynamics in the state (in Boulder), but has been demonstrated to read the same as the one in Revolutions.



I don't think that the DD shifts the curve to the right, nor do I think altitude affects spool much at all. Mine is an 05 LGT (so big difference here, 2.5L), also running E85 but catted DP. This is with a VF52. (My tune wasn't 100% done at the time.. I've since increased and smoothed boost and given more attention to high rpm power).

It looks like maybe the HTA68 will hold boost better up top than the VF52, but the spool..... huh.

Last edited by Guy on the corner; 05-31-2009 at 07:52 AM.
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Old 05-31-2009, 01:00 PM   #16
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Quote:
Originally Posted by Guy on the corner View Post


I don't think that the DD shifts the curve to the right, nor do I think altitude affects spool much at all. Mine is an 05 LGT (so big difference here, 2.5L), also running E85 but catted DP. This is with a VF52. (My tune wasn't 100% done at the time.. I've since increased and smoothed boost and given more attention to high rpm power).

It looks like maybe the HTA68 will hold boost better up top than the VF52, but the spool..... huh.
I hope you fixed that power dropping off, thats a crazy amount of power youve lost to red line.
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Old 05-31-2009, 01:54 PM   #17
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Quote:
Originally Posted by Guy on the corner View Post
Wow I'm surprised the spool isn't better, especially with E85. For comparison here is my dyno plot from same type dyno, CF, and altitude. It's the other Dyno Dynamics in the state (in Boulder), but has been demonstrated to read the same as the one in Revolutions.



I don't think that the DD shifts the curve to the right, nor do I think altitude affects spool much at all. Mine is an 05 LGT (so big difference here, 2.5L), also running E85 but catted DP. This is with a VF52. (My tune wasn't 100% done at the time.. I've since increased and smoothed boost and given more attention to high rpm power).

It looks like maybe the HTA68 will hold boost better up top than the VF52, but the spool..... huh.
It absolutely skews the graph. Your car doesn't spool even faster than that graph shows on the road? If you set the ramp rate on the DD (the little dial next to the switch on the handheld) to ramp more load in sooner it will skew everything to the left, if you go the other way it skews everything to the right, the trick is matching road acceleration with dyno ramp rate with the gear you're in. Harvey does a great job producing repeatable data and smooth curves but I don't think anyone can expect a road test on every vehicle to find road ramp rate on flat ground.
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Old 05-31-2009, 02:20 PM   #18
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Your car spools fast because of the 2.5 liter. I've seen a 150ftlb gain on an 18g wrx when we switched the block from 2.0 to 2.5 with no other mods. The car will spool 1000rpm's earlier with a 2.5 liter but choke off up top.
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Old 05-31-2009, 02:25 PM   #19
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Quote:
Originally Posted by Batman wrx! View Post
are the numbers so low because of were you live? sorry if this is a noobish thing to ask haha. i am stage 2 protuned and i put down 253 whp and 253 ftlbs torq..just trying to understand the numbers someone please help..
A stock wrx on this dyno makes about 155-165whp. Stage 2 WRX's make 190-205 and stock sti's make 215-225.
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Old 05-31-2009, 03:38 PM   #20
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Quote:
Originally Posted by Drac9 View Post
A stock wrx on this dyno makes about 155-165whp. Stage 2 WRX's make 190-205 and stock sti's make 215-225.
it also depends what you mean by stage 2, a stage 2 pro tune can make significantly more power than an ots stage 2
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Old 05-31-2009, 03:44 PM   #21
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Drac9 I acknowledge that 2.5L vs. 2.0L would make a difference, but didn't realize it was that much of a difference. I'm waiting to see a dyno plot from you or Harvey with the HTA68 on a 2.5L to see how it compares with the VF52. It sounds like the HTA68 should be the better turbo but tough to tell how much is hype..

As for my tune, Harvey also commented on the power drop up top. I wasn't 100% done tuning but had my car at Super for a repair and had a dyno run while there. Next time I'm there I'll get another run on my finished tune. I'm expecting a modest increase to 290/325, but more AUC, smoothness, and less of a taper in power. The top-end power was good enough at that level for a 12.9 @ 107mph at Bandimere, will be better next time.
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Old 05-31-2009, 05:51 PM   #22
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What boost and AFR in gasoline scale?
Without knowing it would be unfair to comment on the power.

Last edited by project_skyline; 05-31-2009 at 06:41 PM. Reason: my mistake :)
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Old 05-31-2009, 06:11 PM   #23
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Quote:
Originally Posted by project_skyline View Post
What boost and AFR in gasoline scale?
Without knowing it would be unfair to comment on the power.

It shows spool late because they use a higher load then what you would see on say a flat road. I would know because i've used both revolutions and supers.
I disagree Will. If you raise the load ramp, it shifts left and torque goes up.
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Old 05-31-2009, 06:22 PM   #24
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Well I got the same set up with a fmic an ewg and a 3 port boost controller I'm hoping for better numbers than that
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Old 05-31-2009, 06:39 PM   #25
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Quote:
Originally Posted by DSM_Outback View Post
I disagree Will. If you raise the load ramp, it shifts left and torque goes up.
Lol your right i was thinking completely backwards.

Spool still seems some what disappointing from a graphical stand point, maybe the OP could comment on street spool.

Either way im interested to know boost and AFR because i really want my friend to put this on his legacy.

Last edited by project_skyline; 05-31-2009 at 06:45 PM.
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