Pros and Cons of TWIN TURBOS ON A MODIFIED 20B

Started by Mir, December 08, 2011, 11:30:57 AM

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BlitzBoy

#15
December 08, 2011, 04:15:26 PM
I would go 5 inch down pipe into 4 inch exhaust system on a 20B
"Piston Killa" 3rd Gen\'94 \'Oldone Racing Full Bridge Ported REW 13b engine with SCR seals\'. HKS T51 KAI turbo BBM mapped Motec ECU

JDS/HKS Street Class Championship Runner up 2011
Rotorstock winner 08,09
http://pistonkilla.blogspot.com/
old spec HB T51 470 @ wheels @ 1.2 BAR, 555 @ fly 10.46 @ 130 @ 1.25 Bar
new spec FB T51 482 @ wheels @ 1.15 BAR, 570 @ fly

New Project
"el fénix" RX2 by Mark & Mark

gsb876

#16
December 08, 2011, 04:18:39 PM
This is going to be just a bit quick me thinks
"Every generation has the chance to change the world"

Mills & Bains guest author :Giggle

Mir

#17
December 08, 2011, 04:22:11 PM
Quote from: BlitzBoy;801767I would go 5 inch down pipe into 4 inch exhaust system on a 20B

Blitz, I am listening.....go on, keep explaining?????? Need a bit more info please......
 
dont stop there :Nono!
 
So you were saying ?????
 
Advantages and disadvantages please?
 
Mir
I am building a Genuine Fastest Street Rotary!
No Cutting and No Removals
Love FDs. Currently own:
20b-Triple Rotor,Single turbo FD
13B- Two Rotor, 2000spec on Stock Twins-FD
13B- Two Rotor, Single Turbo FD
Quote:
Originally Posted by youngone 
It takes some money for engineering a proper 20b

My C

BlitzBoy

#18
December 08, 2011, 04:33:51 PM
simple its a big turbo, you have 3 rotors instead of two , therefore more exhaust volume will be generated hence more chance of back pressure, going bigger on the diameter on the downpipe will help top end power
"Piston Killa" 3rd Gen\'94 \'Oldone Racing Full Bridge Ported REW 13b engine with SCR seals\'. HKS T51 KAI turbo BBM mapped Motec ECU

JDS/HKS Street Class Championship Runner up 2011
Rotorstock winner 08,09
http://pistonkilla.blogspot.com/
old spec HB T51 470 @ wheels @ 1.2 BAR, 555 @ fly 10.46 @ 130 @ 1.25 Bar
new spec FB T51 482 @ wheels @ 1.15 BAR, 570 @ fly

New Project
"el fénix" RX2 by Mark & Mark

Mir

#19
December 08, 2011, 04:40:15 PM
Quote from: BlitzBoy;801775simple its a big turbo, you have 3 rotors instead of two , therefore more exhaust volume will be generated hence more chance of back pressure, going bigger on the diameter on the downpipe will help top end power

Umm, so this will give me a better top end, however; from a street racing point of view, this set up is not ideal isn\'t?
 
Mir
I am building a Genuine Fastest Street Rotary!
No Cutting and No Removals
Love FDs. Currently own:
20b-Triple Rotor,Single turbo FD
13B- Two Rotor, 2000spec on Stock Twins-FD
13B- Two Rotor, Single Turbo FD
Quote:
Originally Posted by youngone 
It takes some money for engineering a proper 20b

My C

BlitzBoy

#20
December 08, 2011, 04:49:58 PM
yes it is ideal, the less back pressure the better on a turbo car , its not NA where you need back pressure. Back pressure hurts spool as well as choking top end.
"Piston Killa" 3rd Gen\'94 \'Oldone Racing Full Bridge Ported REW 13b engine with SCR seals\'. HKS T51 KAI turbo BBM mapped Motec ECU

JDS/HKS Street Class Championship Runner up 2011
Rotorstock winner 08,09
http://pistonkilla.blogspot.com/
old spec HB T51 470 @ wheels @ 1.2 BAR, 555 @ fly 10.46 @ 130 @ 1.25 Bar
new spec FB T51 482 @ wheels @ 1.15 BAR, 570 @ fly

New Project
"el fénix" RX2 by Mark & Mark

Mir

#21
December 08, 2011, 05:24:49 PM
Thanks for the input Blitzen. I should be speaking with a fabricator soon.
 
Cheers
Mir
I am building a Genuine Fastest Street Rotary!
No Cutting and No Removals
Love FDs. Currently own:
20b-Triple Rotor,Single turbo FD
13B- Two Rotor, 2000spec on Stock Twins-FD
13B- Two Rotor, Single Turbo FD
Quote:
Originally Posted by youngone 
It takes some money for engineering a proper 20b

My C

HaywardRotary

#22
December 08, 2011, 05:26:30 PM
Quote from: BlitzBoy;801778yes it is ideal, the less back pressure the better on a turbo car , its not NA where you need back pressure. Back pressure hurts spool as well as choking top end.

With the exception of a rotary engine where back pressure is the enemy for both turbo and N/A but more so on N/A for squeezing every pony you can out of the motor.
We warranty our rebuilt engines for Detonation, track day\'s and RWYB and NOW for 30 months which is two and half years or 30,000 miles
We also build all types of race or road engines.
We build race and track cars too.
Any kind of porting undertaken.
Single turbo conversions.
S

m1tch

#23
December 08, 2011, 09:36:35 PM
I see no back pressure here!



I see no apex seals still inside the engine very soon!

Grant Monkhouse

#24
December 08, 2011, 09:45:38 PM
Nitrous for spooling huge turbo??

m1tch

#25
December 08, 2011, 09:51:04 PM
Quote from: Grant Monkhouse;801834Nitrous for spooling huge turbo??

Im guessing so :) also in the first photo you see why I have fitted FD rims to my FC, I don\'t seem to need 12" rear wheels to get enough traction for power lol

Grant Monkhouse

#26
December 08, 2011, 09:52:03 PM
Quote from: m1tch;801838Im guessing so :) also in the first photo you see why I have fitted FD rims to my FC, I don\'t seem to need 12" rear wheels to get enough traction for power lol
I also have FD wheels for my rx4:Thumbsup!:2eek:yes:yes

Grant Monkhouse

#27
December 08, 2011, 09:55:09 PM
Syed i hav emailed AET turbos to get some spec sheets for you on the s475, im sure they can be found online though. i have asked for what size exhaust housings they do etc

m1tch

#28
December 08, 2011, 09:55:12 PM
Quote from: Grant Monkhouse;801839I also have FD wheels for my rx4:Thumbsup!:2eek:yes:yes

:D I think we win more :D you fitted a cut down turbo II bonnet to it? :)

Grant Monkhouse

#29
December 08, 2011, 09:56:32 PM
Quote from: m1tch;801843:D I think we win more :D you fitted a cut down turbo II bonnet to it? :)
Nope just the heavy arsed rx4 bonnet. I need to find a light weight one as it is too heavy.
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