NA 20B's ??
07-03-05, 02:31 AM
#2
S3 RX-7 - 20BT 450 RWHP
Join Date: Dec 2004
Location: Brisbane, Australia
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Originally Posted by eyecandy
I am curious as to how many NA 20B's are out there. If you have one what kind of internal mods, external mods, ecu, etc do you have? What kind of power are you making?
Internal mods: Extend port. Full rebuilt.
ECU: Microtech LTX12
07-04-05, 07:32 AM
#7
This is what I have in mind for a 20B NA motor, I am still uncertain if I want to stay 13B or go 20B, since I could get the same power from a turboed 13B.
-9.7:1 rotors w/radiused edge like renesis rotors
-Renesis Statinary gears
-Balanced rotating mass
-Water Jacket mod
-Lightned Flywheel and pullies kit
-CerMet coated rotors and possible rotor housings
-Street ported (nothing to aggresive)
If going on the extreme side add or change with the following:
-Machined Renesis rotors
-Guru Racing tension rods
-Front main bearing loop line
-Clearanced rotors
-Entire engine CerMet coated
Then I have been thinking of the reprogramed AEM ecu, Haltech E11, or Motec.
-9.7:1 rotors w/radiused edge like renesis rotors
-Renesis Statinary gears
-Balanced rotating mass
-Water Jacket mod
-Lightned Flywheel and pullies kit
-CerMet coated rotors and possible rotor housings
-Street ported (nothing to aggresive)
If going on the extreme side add or change with the following:
-Machined Renesis rotors
-Guru Racing tension rods
-Front main bearing loop line
-Clearanced rotors
-Entire engine CerMet coated
Then I have been thinking of the reprogramed AEM ecu, Haltech E11, or Motec.
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07-07-05, 03:00 AM
#12
S3 RX-7 - 20BT 450 RWHP
Join Date: Dec 2004
Location: Brisbane, Australia
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Originally Posted by eyecandy
Were the 20B's under rated from factory? They must have been seeing that those numbers are close to the 13Brew with the twins.
Cosmo 20Bs were rated at 276 hp (206kw) however real output is supposedly 320 hp
