FIST stock turbo vs. Abarth

[madfiesta14]

I see, and have started chatter about the " To downpipe or not to downpipe" on our stock turbos. My Unichip stage 2 tuned by HPSI would peak about 26 psi and hold 24 then taper down. I know it was a Garret 1426 I think,any would upgrade to garret 1726 etc
I dont know if this helps but my old Abarth platform sees more HP with that snail then we do. On pump gas.

 

[madfiesta14]

Gt1446 is stock the next size that peopl go to is
gt1752

 

[Hijinx]

Something something, compressor map, something something less power.

 

[Bluedrank]

Excellent thread.

 

[madfiesta14]

Excellent thread.

I thought so, yeah AR are different etc. I want to learn, someone like me that has owned 2 of the most fun for your money under 25k vehicles wants answers........I am sure others would also

 

[madfiesta14]

My GFB+ diverter valve didnt claim HP, and many said it was a waste of $, that and some wastegate arm adjustment and a lightweight crank pulley all added up to a FUN ass hatchback!# oh yeah 3mm overbore throttle body was seen as a "waste"....

 

[Hijinx]

I thought so, yeah AR are different etc. I want to learn, someone like me that has owned 2 of the most fun for your money under 25k vehicles wants answers........I am sure others would also

I gave you an answer. I looked at the compressor map of the 1752, and you're probably gonna choke it on the top end trying to make the same power. I can't find one for the 1446, but since it's smaller, your gonna choke that one too. So, this is why I think it'd make less power since you'd have to dial the boost back more to keep away from the choke point.

 

[madfiesta14]

I gave you an answer. I looked at the compressor map of the 1752, and you're probably gonna choke it on the top end trying to make the same power. I can't find one for the 1446, but since it's smaller, your gonna choke that one too. So, this is why I think it'd make less power since you'd have to dial the boost back more to keep away from the choke point.

Gotcha

 

[Ryephile]

I used to have an Abarth too, but I'm not sure what your point is with this thread. Are you looking for a reason why Engine A with Turbo B is different than Engine C with Turbo D? There are 4 variables right there.

I can assure you that nobody is going to make an adapter to run a GT1446 on a FiST. Anything more than 200 crank HP on a GT1446 is a spinning time-bomb of over-revving.

 

[madfiesta14]

It was not meant to use Garret on FIST it was just curious of the differences between them from an output perspective and their reliable limits thats all.

 

[madfiesta14]

I used to have an Abarth too, but I'm not sure what your point is with this thread. Are you looking for a reason why Engine A with Turbo B is different than Engine C with Turbo D? There are 4 variables right there.

I can assure you that nobody is going to make an adapter to run a GT1446 on a FiST. Anything more than 200 crank HP on a GT1446 is a spinning time-bomb of over-revving.

And I remember you from Fiattech. My name was madfiat13.

 

[Ryephile]

It was not meant to use Garret on FIST it was just curious of the differences between them from an output perspective and their reliable limits thats all.

They're both small turbo's that prioritize low boost thresholds over high flow rates. The only real way to step up the game for a street application would be to go to a twin scroll manifold and turbine and only modestly increase the turbo sizing. That would retain the low RPM boost threshold and add legitimate flow rate for greater top-end HP and a flatter torque curve.

All the aftermarket turbo kits I see are either overly large twin-scrolls via the EFR range, or simply larger single scrolls. There's clearly room for a "mid-sized" turbo that offered balanced performance for satisfactory real-world boost threshold and rational power levels for a front-drive car.

 

[madfiesta14]

They're both small turbo's that prioritize low boost thresholds over high flow rates. The only real way to step up the game for a street application would be to go to a twin scroll manifold and turbine and only modestly increase the turbo sizing. That would retain the low RPM boost threshold and add legitimate flow rate for greater top-end HP and a flatter torque curve.

All the aftermarket turbo kits I see are either overly large twin-scrolls via the EFR range, or simply larger single scrolls. There's clearly room for a "mid-sized" turbo that offered balanced performance for satisfactory real-world boost threshold and rational power levels for a front-drive car.

Thank you sir, and BTW I did your boost mod on my Abarth!!!

 

[Hijinx]

They're both small turbo's that prioritize low boost thresholds over high flow rates. The only real way to step up the game for a street application would be to go to a twin scroll manifold and turbine and only modestly increase the turbo sizing. That would retain the low RPM boost threshold and add legitimate flow rate for greater top-end HP and a flatter torque curve.

All the aftermarket turbo kits I see are either overly large twin-scrolls via the EFR range, or simply larger single scrolls. There's clearly room for a "mid-sized" turbo that offered balanced performance for satisfactory real-world boost threshold and rational power levels for a front-drive car.

Have you seen the Cyborg?

 

[madfiesta14]

Have you seen the Cyborg?

I doubt RYephile has he joine 03/08/16. We both came from Abarths and had no hybrid options. Hijinx is right check out the cyborg threads. You will be pleasantly surprised. Hijinx didnt you run a Cyborg before you stepped up to the BT?

 

[1azst]

Have you seen the Cyborg?

This x 2

 

[Hijinx]

I doubt RYephile has he joine 03/08/16. We both came from Abarths and had no hybrid options. Hijinx is right check out the cyborg threads. You will be pleasantly surprised. Hijinx didnt you run a Cyborg before you stepped up to the BT?

That is correct. I had v1 and v2 (thanks to a certain "quick lube" joint). I saw a best of 235whp at redline with a pretty flat torque curve from about 2.5krpm or so. That was on e30...long story. Sour has seen 290something on methanol.

 

[twolf]

I'd love to hear that story about the quick lube place.

 

[GateCityRadio]

That is correct. I had v1 and v2 (thanks to a certain "quick lube" joint). I saw a best of 235whp at redline with a pretty flat torque curve from about 2.5krpm or so. That was on e30...long story. Sour has seen 290something on methanol.

Why such low numbers? I would of figured at least 250 on E30. After talking to adam at tune+ I'm looking at between 235-245 on 93 and 260 on E40. I was really hoping for more but I got my cyborg used for a good price so I'll take what I can get.

Edit* nevermind I see where you said at redline...what was peak whp?

 

[Hijinx]

Why such low numbers? I would of figured at least 250 on E30. After talking to adam at tune+ I'm looking at between 235-245 on 93 and 260 on E40. I was really hoping for more but I got my cyborg used for a good price so I'll take what I can get.

Edit* nevermind I see where you said at redline...what was peak whp?

My peak was at redline. I didn't have the external with mine. The condensed story is that I was with Panda w/ Matt tuning and it was being done very slowly, especially when it was cold. There was a lot of instability with combustion on the top end when the weather was 40° and below. We backed it down and held through the winter off until spring. This was all back half of 2014 to spring 2015 when the v2 went on. Anyway, once spring came around, tuning was sparse, maybe one revision a month. So, by the end of spring 15, I gave up on it. It seemed like Matt already had. My DHM kit came in summer 15.