Rotary Car Club - View Single Post - high boost @ low rpm torque monster setup

88turboii · 08-31-2011, 10:04 AM

i came across a tech article on subaru WRC engine tuning..

http://www.i-club.com/forums/subaru-...popcorn-69783/

basically the WRC engines are limited to about 300hp due to a 34mm restrictor placed in the intake. this makes it advantageous to maximize power throughout the rpm band, and the result is a very torquey 300hp at 3krpm from 2.0 liters. some of the notes:

2.0L engine, 9.1 cr (1995)
boost is 30-45psi! at low rpm, then it is tapered off to half that at redline
anti-lag is used to generate boost at low rpm. uses retarded timing, rich mixture, and a throttle bypass valve
water injection is used at low rpm to prevent knock, injected between IC and intake manifold, and results in almost ambient intake temps at max boost. water injection amount is controlled via an ecu map. uses an ERL aquamist 2C kit:

http://www.rotorsportsracing.com/per...njection2c.htm

I want to try something similar with a rotary, but not as extreme. I am thinking using antilag to generate the boost at low rpm, but only during wot low rpm conditions. at idle and normal throttle inputs, it would not be active. but if you go WOT, it would be activated briefly to generate the boost, then once a boost threshhold is obtained, it would be disabled and go back to the normal map. I have a haltech ps1000 waiting to install, so im going to try it with that, which has a better antilag function than my current e6k. the only other thing i need to upgrade is direct fire ignition, which i will probably just use a pair of trailing coils. should be interesting

08-31-2011, 10:04 AM	#12
88turboii destroy, rebuild, repeat Join Date: Feb 2008 Location: Charleston, SC Posts: 395 Rep Power: 18	i came across a tech article on subaru WRC engine tuning.. http://www.i-club.com/forums/subaru-...popcorn-69783/ basically the WRC engines are limited to about 300hp due to a 34mm restrictor placed in the intake. this makes it advantageous to maximize power throughout the rpm band, and the result is a very torquey 300hp at 3krpm from 2.0 liters. some of the notes: 2.0L engine, 9.1 cr (1995) boost is 30-45psi! at low rpm, then it is tapered off to half that at redline anti-lag is used to generate boost at low rpm. uses retarded timing, rich mixture, and a throttle bypass valve water injection is used at low rpm to prevent knock, injected between IC and intake manifold, and results in almost ambient intake temps at max boost. water injection amount is controlled via an ecu map. uses an ERL aquamist 2C kit: http://www.rotorsportsracing.com/per...njection2c.htm I want to try something similar with a rotary, but not as extreme. I am thinking using antilag to generate the boost at low rpm, but only during wot low rpm conditions. at idle and normal throttle inputs, it would not be active. but if you go WOT, it would be activated briefly to generate the boost, then once a boost threshhold is obtained, it would be disabled and go back to the normal map. I have a haltech ps1000 waiting to install, so im going to try it with that, which has a better antilag function than my current e6k. the only other thing i need to upgrade is direct fire ignition, which i will probably just use a pair of trailing coils. should be interesting __________________ 1993 RX-7 Touring MB, stockport 13B-REW, 9.4CR rotors, T04S 60-1/p-trim single turbo 1986 RX-7 Base project track beast