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407 HP by Frenchrafe
Started on: 06-11-2021 11:05 AM
Replies: 17 (243 views)
Last post by: Frenchrafe on 06-14-2021 03:00 PM
Frenchrafe
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Report this Post06-11-2021 11:05 AM Click Here to See the Profile for FrenchrafeClick Here to Email FrenchrafeSend a Private Message to FrenchrafeEdit/Delete MessageReply w/QuoteDirect Link to This Post



'Nuff said !

Bonne journée.

Link to video:
https://youtu.be/M6URzFspngg

------------------
"Turbo Slug" - '87 Fiero GT. 3800 turbo. - The fastest Fiero in France!
https://www.youtube.com/cha...1wZvWQlkYxTjivW_0XNg

[This message has been edited by Frenchrafe (edited 06-14-2021).]

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Blacktree
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Report this Post06-11-2021 11:47 AM Click Here to See the Profile for BlacktreeClick Here to visit Blacktree's HomePageClick Here to Email BlacktreeSend a Private Message to BlacktreeEdit/Delete MessageReply w/QuoteDirect Link to This Post
That's a nice torque curve! For us Americans, 491 Nm is about 362 ft-lb.
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fishsticks
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Report this Post06-11-2021 12:07 PM Click Here to See the Profile for fishsticksSend a Private Message to fishsticksEdit/Delete MessageReply w/QuoteDirect Link to This Post
Look at that. 3500 RPM range within 10% of peak torque.

Yeah, that thing's a monster exiting a turn...
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Frenchrafe
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Report this Post06-11-2021 12:11 PM Click Here to See the Profile for FrenchrafeClick Here to Email FrenchrafeSend a Private Message to FrenchrafeEdit/Delete MessageReply w/QuoteDirect Link to This Post
Yes, we tuned it to give max torque.
On 1 dyno pull, we got 447HP but it was too lean!
Backed off a bit, and tried to go for a nice linear power curve.
I am pleased with the result 👍👌😀

------------------
"Turbo Slug" - '87 Fiero GT. 3800 turbo. - The fastest Fiero in France!
https://www.youtube.com/cha...1wZvWQlkYxTjivW_0XNg

[This message has been edited by Frenchrafe (edited 06-14-2021).]

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Frenchrafe
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Report this Post06-11-2021 12:16 PM Click Here to See the Profile for FrenchrafeClick Here to Email FrenchrafeSend a Private Message to FrenchrafeEdit/Delete MessageReply w/QuoteDirect Link to This Post

Frenchrafe

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Member since Feb 2017
And yes, Turbo Slug is unbeatable coming out of a turn !
😜🤘

------------------
"Turbo Slug" - '87 Fiero GT. 3800 turbo. - The fastest Fiero in France!
https://www.youtube.com/cha...1wZvWQlkYxTjivW_0XNg

[This message has been edited by Frenchrafe (edited 06-11-2021).]

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Notorio
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Report this Post06-11-2021 01:01 PM Click Here to See the Profile for NotorioSend a Private Message to NotorioEdit/Delete MessageReply w/QuoteDirect Link to This Post
What is physically happening at around 6200 rpm that causes HP and TRQ to drop like a rock? Are the valves no longer able to seal?
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Frenchrafe
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Report this Post06-11-2021 01:14 PM Click Here to See the Profile for FrenchrafeClick Here to Email FrenchrafeSend a Private Message to FrenchrafeEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Notorio:

What is physically happening at around 6200 rpm that causes HP and TRQ to drop like a rock? Are the valves no longer able to seal?


Probably being over cautious on the dyno.
Anyway, there's a 6500rpm cutout in the tune.
The dyno guy knew this and lifted his foot before. In his experience, he doesn't push an engine to it's absolute limit.
He (and I) wanted max perf and reliability😉

------------------
"Turbo Slug" - '87 Fiero GT. 3800 turbo. - The fastest Fiero in France!
https://www.youtube.com/cha...1wZvWQlkYxTjivW_0XNg

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Report this Post06-11-2021 11:18 PM Click Here to See the Profile for NotorioSend a Private Message to NotorioEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Frenchrafe:

Probably being over cautious on the dyno.
Anyway, there's a 6500rpm cutout in the tune.
The dyno guy knew this and lifted his foot before. In his experience, he doesn't push an engine to it's absolute limit.
He (and I) wanted max perf and reliability😉



OK, got it. Just curious how much boost you are running and how that would compare to the boost in the SC version. I guess that will be Apples vs Oranges no matter how you think about the two.
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La fiera
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Report this Post06-12-2021 12:02 AM Click Here to See the Profile for La fieraSend a Private Message to La fieraEdit/Delete MessageReply w/QuoteDirect Link to This Post
Awesome Rafe!!
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Frenchrafe
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Report this Post06-12-2021 12:39 AM Click Here to See the Profile for FrenchrafeClick Here to Email FrenchrafeSend a Private Message to FrenchrafeEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Notorio:


OK, got it. Just curious how much boost you are running and how that would compare to the boost in the SC version. I guess that will be Apples vs Oranges no matter how you think about the two.


I don't run alot of boost ; between 0.75 and 1 bar. Yesterday, we were just running at wastegate spring pressure. So more in the 0.75bar range (11 psi ?).
It was mighty hot yesterday as well and I saw a 40°C intake temp. My intercooler works better on the track/road than on the dyno! Not enough airflow even with dyno fans.
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Report this Post06-12-2021 12:40 AM Click Here to See the Profile for FrenchrafeClick Here to Email FrenchrafeSend a Private Message to FrenchrafeEdit/Delete MessageReply w/QuoteDirect Link to This Post

Frenchrafe

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quote
Originally posted by La fiera:

Awesome Rafe!!


Thanks Rei👍😉
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Report this Post06-12-2021 01:23 PM Click Here to See the Profile for fishsticksSend a Private Message to fishsticksEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Frenchrafe:


I don't run alot of boost ; between 0.75 and 1 bar. Yesterday, we were just running at wastegate spring pressure. So more in the 0.75bar range (11 psi ?).
It was mighty hot yesterday as well and I saw a 40°C intake temp. My intercooler works better on the track/road than on the dyno! Not enough airflow even with dyno fans.


Your IC is just in front of the engine with a spoiler directing air upwards, correct?

Maybe put together some flexible ducting and get some dyno air under there next time?
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Frenchrafe
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Report this Post06-13-2021 04:05 AM Click Here to See the Profile for FrenchrafeClick Here to Email FrenchrafeSend a Private Message to FrenchrafeEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fishsticks:


Your IC is just in front of the engine with a spoiler directing air upwards, correct?

Maybe put together some flexible ducting and get some dyno air under there next time?


That's exactly what the dyno opperator said!
He suggested extra tubing in my engine bay as well to duct cold air towards the turbo. He thought it was mighty tight and hot in there.

------------------
"Turbo Slug" - '87 Fiero GT. 3800 turbo. - The fastest Fiero in France!
https://www.youtube.com/cha...1wZvWQlkYxTjivW_0XNg

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Frenchrafe
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Report this Post06-13-2021 04:10 AM Click Here to See the Profile for FrenchrafeClick Here to Email FrenchrafeSend a Private Message to FrenchrafeEdit/Delete MessageReply w/QuoteDirect Link to This Post

Frenchrafe

173 posts
Member since Feb 2017
A few of photos of the dyno day :







------------------
"Turbo Slug" - '87 Fiero GT. 3800 turbo. - The fastest Fiero in France!
https://www.youtube.com/cha...1wZvWQlkYxTjivW_0XNg

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Report this Post06-14-2021 10:22 AM Click Here to See the Profile for TrintenSend a Private Message to TrintenEdit/Delete MessageReply w/QuoteDirect Link to This Post
C'est manifique! Vous avez pris soin de votre voiture. Ca a l'air bien!
(that is the most French I've used since I took classes in high school... hopefully it made sense).

[This message has been edited by Trinten (edited 06-14-2021).]

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Frenchrafe
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Report this Post06-14-2021 12:28 PM Click Here to See the Profile for FrenchrafeClick Here to Email FrenchrafeSend a Private Message to FrenchrafeEdit/Delete MessageReply w/QuoteDirect Link to This Post
Merci.
Tu maîtrises bien la langue française 👍😉

------------------
"Turbo Slug" - '87 Fiero GT. 3800 turbo. - The fastest Fiero in France!
https://www.youtube.com/cha...1wZvWQlkYxTjivW_0XNg

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Will
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Report this Post06-14-2021 01:02 PM Click Here to See the Profile for WillClick Here to Email WillSend a Private Message to WillEdit/Delete MessageReply w/QuoteDirect Link to This Post
So far zero pics of the turbo engine... Looks like a 3800 from your YouTube vid?
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Frenchrafe
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Report this Post06-14-2021 03:00 PM Click Here to See the Profile for FrenchrafeClick Here to Email FrenchrafeSend a Private Message to FrenchrafeEdit/Delete MessageReply w/QuoteDirect Link to This Post
It's not a pretty engine to look at from the top, and yes it's a 3800 S2.
Next time I drop the cradle, I'll try to remember to take some photos !

Here's a photo from last year:


Otherwise, check out the build vid for lots of engine photos :
https://youtu.be/zFp07WovKXk

------------------
"Turbo Slug" - '87 Fiero GT. 3800 turbo. - The fastest Fiero in France!
https://www.youtube.com/cha...1wZvWQlkYxTjivW_0XNg

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