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Hypergear Turbochargers and High flow Services Development thread

hypergear

By hypergear,
in Engines & Forced Induction

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SeanR32GtSt Community Regular

SeanR32GtSt

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Got my 34 gtt tuned last week. Car made 362 wheel horsepower at 19 psi. Turbo was the ATR43SS. Only other upgrades were haltech 2000 series. 650cc injectors, walbro 250, fmic. Pro hub dyno reads 6% lower than actual figure according to my tuner. Car is a real ripper now. 

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Edited by SeanR32GtSt
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Lithium
Lithium

I was reading through the thread and was going to weigh in anyway, though looks like you're very much on the page I am reading from - so I'll +1 with with a bit more anecdotal evidence to support it

hypergear
hypergear

The ATR28SS15 would be a perfect turbo for your application. I didn't look into some thing even smaller as it doesn't make that much of a difference in response but did loses quite a lot of power. I'

Dose Pipe Sutututu
Dose Pipe Sutututu

^ lol... maybe I'll use a 3" intake pipe and add in more bends.. that usually gets the suuuuuuuuuuuuuuuutuuututuutut going LOL. Anyhow, some real world facts to back up the results.. errbody likes ti

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GTSBoy Grand Master

GTSBoy

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Posted
1 hour ago, SeanR32GtSt said:

Pro hub dyno reads 6% lower than actual figure according to my tuner.

Lower than engine, or lower than it should at the hubs?

Either way, that is a nice power figure and I'm not surprised you say it rips now.

What stopped you from turning it up any more? Injectors? Or did it just stop responding to boost?

SeanR32GtSt Community Regular

SeanR32GtSt

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Posted (edited)
40 minutes ago, GTSBoy said:

Lower than engine, or lower than it should at the hubs?

Either way, that is a nice power figure and I'm not surprised you say it rips now.

What stopped you from turning it up any more? Injectors? Or did it just stop responding to boost?

Lower at the hubs. Funny I forgot to mention that part. Do this pull here I turned the camera off too soon but the graph shows a drop at the top and that was because the pipe from the turbo blew off. The tuner said we could’ve made possibly another 15 whp. He also added if I switched to ethanol we could up the boost some more as well. I was comfortable capping it at the most of 20 pounds. Turns out the turbo pipe just needed a new worm clamp. Got home replaced that then did a third gear pull from 3k to 7200 rpm and the power was great to the top. I just got an ecu mounting bracket from IEE that I need to try and get everything to fit well. It’s a PITA to get the harness and ecu fit properly behind that kick plate 

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