Author Topic: Few FC3s questions  (Read 1079 times)

Offline re japi

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Few FC3s questions
« on: December 30, 2018, 07:29:40 PM »
Well I have strugling to get answers to these questions. I have done lots of research but cant find any desent answers.
So, if some rotary builder can give me straight answer. Or some of you guys see notorious engine builder, can you do me a favor and get answer to these questions:

1:
So, Im doing semi bridge port for S5 and I got desent size turbo. My question is that what kind/size of exhaust ports when I want that turbo to spool up as early as possible, and power delivery smooth as possible? Pineapple racing ports is my best option at this point..?

Its Schwitzer S300 hybrid 60/68 1.16 ar... In previous setup(in my friends car) it made 530hp @ 1,6bar, semi bridge. With quite agressive D shaped exhaust port, straight opening, round closing. It spooled quite fast, around 3500-4000rpm, but then it hitted hard

Im actually not going for big power, I want drivebility, well at this point anyways. ;) At first I was leaning towards large street port, but desided to do BP, for couple reasons actually. But when I was considering that street port, then too my problem was that exhaust port shape. I havent found desent comparison between different port shapes

2:
S5 rotor gearings and bearings are supposed to be crap. Should I get FDs or Rennys or Im ok with these?

3:
How much stock fuel rail flows? Or stock fuel lines anyways?

4:
I have (at the moment) 50g difference between rotors. To what tolerance should I try to get them to be safe?

Any info is much appriciated! :)
Cheers
Japi

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Power is nothing without control. Weight is enemy of performance, handling and braking.

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Offline RE5

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« Last Edit: December 31, 2018, 11:25:29 AM by RE5 »
Current: RX7s   FB S3 & FC S5 Vert

Previously owned:  2 x NSU Ro 80 - 2 x RX7 FB S2 - Suzuki RE5 -Norton Commander - DKW W2000

Offline re japi

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Re: Few FC3s questions
« Reply #2 on: December 31, 2018, 11:57:27 AM »
I did. Basically no good answers

Lähetetty minun E2303 laitteesta Tapatalkilla

Power is nothing without control. Weight is enemy of performance, handling and braking.

http://s1293.photobucket.com/user/japi_laukkanen/library/Japi?sort=3&page=1

Offline RE5

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Re: Few FC3s questions
« Reply #3 on: December 31, 2018, 12:02:08 PM »
I did. Basically no good answers

Lähetetty minun E2303 laitteesta Tapatalkilla

How about:-

http://www.ausrotary.com/index.php
Current: RX7s   FB S3 & FC S5 Vert

Previously owned:  2 x NSU Ro 80 - 2 x RX7 FB S2 - Suzuki RE5 -Norton Commander - DKW W2000

Offline re japi

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Re: Few FC3s questions
« Reply #4 on: December 31, 2018, 12:05:43 PM »
I did. No answers at all

Lähetetty minun E2303 laitteesta Tapatalkilla

Power is nothing without control. Weight is enemy of performance, handling and braking.

http://s1293.photobucket.com/user/japi_laukkanen/library/Japi?sort=3&page=1

Offline rickkyyp

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Re: Few FC3s questions
« Reply #5 on: January 05, 2019, 08:02:32 AM »
I would suggest searching and posting on the American RX7 forum. Its far more active than this place so you have a better chance of getting a good answer.

Offline re japi

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Re: Few FC3s questions
« Reply #6 on: January 05, 2019, 09:43:59 AM »
I didnt post on US forums, but I did to some FB pages... I dont want to post to them cause answers are usually some bull**it, taunting or something like that, "Dont you know you moron" kind of answers...

Weird thing is that research actually cant get you very far, cause some stuff no one just wont talk about. Like my exhaust port shape question. I can found some answers, but not those what I need to find. Nothing solid anyways...

Anyways, one helpful guru did send me PM´s so I think I have those things covered now.  :notworthy:
Power is nothing without control. Weight is enemy of performance, handling and braking.

http://s1293.photobucket.com/user/japi_laukkanen/library/Japi?sort=3&page=1