High FC for BT

[Oldae92]

Hello Sifus out there..

I have a problem here, i just converted my AE92 from stock engine to BT20V(manual). Somehow the FC is abit high. I though I need to run in the engine sometime to make it better. However after 2 months of using, plus 5 trips from Penang to KL. The FC is still around 10km/Litre for mostly highway driving. I drive around 110Km/h - 120km/h with RPM at 3.5K to 4.0K.

So anything could suggest anything could be done to help FC ?

:confused_smile:

 

[KHWONG]

haha,.. me also have same problem.. but my car is running SVT on ae101;..FC sae as urs.. also looking for the answer y fc so bad....

BT on Ae92 running Rm 30 =180km... hihi

 

[LuXun]

Oldae92,you are 5 speed or 6 speed gear box? 120km/h with 4k rpm i think is a bit high. Anywhere i'm using 6spd, at 120km/h is like 3.6k rpm. FC around 11.5km/L.... best best 13km/L.... 100% highway at 120km/h average.

 

[Oldae92]

Hi

Mine one is manual 5 speed, I also feel that the RPM is abit high !! Based on the engine sound and also my previous engine (4A FE manual) gearbox, usually around 120Km/h the RMP is only less than 3.3K, Is there any need to tune the timing ? Does EFI engine need tuning ?

 

[4agze]

BT engine is high rev engine thus you reach 4k RPM although you running at 120km/h only, and RM30 = 180km is consider very good FC already. If you want higher, better stick to original engine or best buy Kelisa

 

[sache]

does decreasing the degree a thing in the distributor will not help?
or replacing to a longer fuel wire connect to injection?

 

[hansonchen]

if the rpm is high, it could be the differential ratio. check if it's 3.9

 

[george8724]

BT engine is high rev engine thus you reach 4k RPM although you running at 120km/h only, and RM30 = 180km is consider very good FC already. If you want higher, better stick to original engine or best buy Kelisa

WHat sifu 4agze said is true. RM30=180km is consider very good liao. Bear in mind that 20v be it svt or bt is a high rev engine. It is meant for high rev and of coz the fc will be a lil bit higher if u compare with those 4afe or other family type engine(non high rev eng). u wan good power of coz u gotta compromise a bit of the fuel lah. U wan good power of coz automatically the fc is higher.

my svt oso around RM30=180km or RM50 = 280-300km and very depending on how u drive and the stuffs that u loaded into ur engine. For example, my svt running on ori ecu can reach RM50=300km on highway. Now i m using Toms ecu(test unit from kenny) can only reach RM50=250km. Of coz the power is there lah.

Hope this explain all ur queries...