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Yesterday I had Mark at tricky tune ( NZ Web Design + Ecommerce Agency: Business Websites + Facebook ) tune up my Charade Gtti race car. We managed 137.5kw at the wheels (184.3HP) on 20psi. Not bad for a little 1L motor! Whats more, as you can see from the 1st dyno sheet we started out with 71.3kw on abount 12psi boost on the factory ECU alone. Thats one VERY respectable increase in anyones books!
As you can see from the dyno sheets below we kept the fueling fairly rich at between 11 and 11.5 on full boost. We noticed there were good power gains to be had with leaner mixtures, but in the name of reliability (if there is such a thing in a race car!) we put more fuel in (as these little 3-banger 20 year old engines need it rich to stay in 1 piece).
Here are some relevant mods that helped achieve this power:
*MAPECU2 ECU
*Custom exhaust manifold
*External wastegate
*VF10/12R hybrid turbo
*2.50" exhaust all the way through
*550cc RX7 injectors
*Larger (56mm?) toyota throttle body on modified intake plennum
*Bar and plate front mount intercooler and 2" alloy intercooler piping
*Simota Urethane series air filter
*MSD ignition leads
*Walbro external fuel pump with surge tank setup
*Adjustable fuel pressure reg
The astute observers may note the lean then rich peak and trough in the fuel curve. For some reason we could not get rid of this - Mark suspected some harmonic issues / pressure waves, possibly from turbo surge?.
Click the thumbnails for larger pics:
Original
Luego de las Mod
El auto de Street Legal, antes que digan algo ese paragolpes es el original del charade detomaso. Y el flaco lo usa todos los fines de semana para track day.
Y lo que vieno despues cuando los chicos se aburrieron con el CB80
[YT]http://www.youtube.com/watch?v=XKQHa9ssEho[/YT]
[YT]http://www.youtube.com/watch?v=yrc1B3-rqTY[/YT]
As you can see from the dyno sheets below we kept the fueling fairly rich at between 11 and 11.5 on full boost. We noticed there were good power gains to be had with leaner mixtures, but in the name of reliability (if there is such a thing in a race car!) we put more fuel in (as these little 3-banger 20 year old engines need it rich to stay in 1 piece).
Here are some relevant mods that helped achieve this power:
*MAPECU2 ECU
*Custom exhaust manifold
*External wastegate
*VF10/12R hybrid turbo
*2.50" exhaust all the way through
*550cc RX7 injectors
*Larger (56mm?) toyota throttle body on modified intake plennum
*Bar and plate front mount intercooler and 2" alloy intercooler piping
*Simota Urethane series air filter
*MSD ignition leads
*Walbro external fuel pump with surge tank setup
*Adjustable fuel pressure reg
The astute observers may note the lean then rich peak and trough in the fuel curve. For some reason we could not get rid of this - Mark suspected some harmonic issues / pressure waves, possibly from turbo surge?.
Click the thumbnails for larger pics:
Original
Luego de las Mod
El auto de Street Legal, antes que digan algo ese paragolpes es el original del charade detomaso. Y el flaco lo usa todos los fines de semana para track day.
Y lo que vieno despues cuando los chicos se aburrieron con el CB80
[YT]http://www.youtube.com/watch?v=XKQHa9ssEho[/YT]
[YT]http://www.youtube.com/watch?v=yrc1B3-rqTY[/YT]
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