tsitalon1

iTrader: (3)

Hey guys,

I just downgraded from the Green to the HTA 71 and I have some results.

I tried to make this an apples to apples comparison, but there are some differences in the temps, tune and boost, none-the-less, I think you'll get the point.

My goals were to pick up mid-range torque, think i did that in spades with very little sacrifice in top end.

Notice points at 3000 and 3500 rpm's, there's an increase of ~100 & ~75 ft/lbs respectively.

Also note that from 5200 to redline is almost a wash, a bit more tuning should be able to get my top end in line.


Also note the 4.11 FD and 10º air temp change.

The car feel MUCH more responsive, actually feels much faster

93 octane
HTA71
ETS 3.5” Intercooler
ETS Lower intercooler pipe
272 Kelfords
FIC 1100 injectors
walbro 255
Open air filter
tephra v7
ecu boost with gm bcs
3" full exhaust with Tanabe Medallion touring catback

GaBe511

iTrader: (12)

nice! thanks for posting

revhappy

What are your list of mods? Is this on 93?

tsitalon1

iTrader: (3)

Updated with mod list..on 93 octane.

kaj

iTrader: (60)

Wow. The green was a LOT laggier than they claim it is. Good thing I kept one of these turbos when I bought my Green.
Do you think the green would have been closer if AFR were the same for both?
It baffles me that the 71 pretty much makes the same power.

e_kobz

iTrader: (36)

Good stuff here! More reasons why I love my 71hta

LetsGetThisDone

iTrader: (1)

The green looks like it right where it should be. Turned up on E85 it could probably hit 35psi at 4k, especially with an HTZ compressor. Which would make it about 500rpm faster than my red.

wickedep

nice..but how is it possible that a 68mm compressor wheel makes more power than a 73mm at similar boost and same octane fuel ?? faster spool is expected. but power?

tsitalon1

iTrader: (3)

At 3k, the 71 makes 12psi, while the green only makes roughly 6.5psi

tsitalon1

iTrader: (3)

Maybe slightly, I tried everything that I could think of and read...I couldn't get mine to spool much faster.

Kaj, you are going to miss this lower end, no doubt in my mind....I'd almost recommend sticking with the 71 and maybe getting some more aggressive cams/intake/SD to open up the top end some more.

I've been self tuning for 20+ years on the dsm platform, but I'm sure they're things I'm not doing "properly"

Example, I'm only able to get 6-8 ° running at the top with rich afr 10.8 or so. I've never been one to consistently achieve 15 ° @ 11.5 at these load levels (270-280) like others seem to be able to get....maybe it's rich knock and I'm too nervous to lean past it...lol

kaj

iTrader: (60)

I'll miss the low end, absolutely. But, it had to be done. I am swapping some s1 cams. No doubt that would have helped with the 71 as well.
All in all, when I'm booking around the track at 5-7 rpm, I need that power..especially on the long straights. The 71 was trying best it could to hold up LOL.

kaj

iTrader: (60)

Im still trying to figure how both wheels are making the same power.
LOL

tsitalon1

iTrader: (3)

Lol, I don't know, but the car feels about the same with much faster lower end pull.

[TK]

man and I was so undecided between the 71hta and the fp green cause I wasnt sure if the 71 would make me satisfied. Happy with my choice for the 71 hta! I'm gonna keep this jewel as long as I can lol.

e_kobz

iTrader: (36)

The 71hta is the ultimate "all around, do everything" turbo for the stock 2.0L motor in my opinion. To this day the most amazing part about it the price. Its a steal at only $700 bucks.