Difficulty achieving top speed

[Shinjite]

His is a 4G15, his low end also a bit too lean but still okay
4000 rpm onwards rich all the way till high end. His power delivery is linear so its okay

With ECU mods, expect close to 90WHP ;)

 

[meltan7]

u what engine liao ah??... why ur AFR drop so drastically??.... power no increase drastically also... after 4k rpm AFR consider rich for NA engine... if get about 13 u can have more power gain...

4G15 bro. i suspect my GB is dying.

 

[blind_lan]

my advice..
better go back to powerzone..
seems many thing u had done there..

"ade jugak yg bikin dgn powerzone tak menjadi.."

 

[Shinjite]

4G15 bro. i suspect my GB is dying.

Is your GB slipping?

 

[SkYwAlKeR]

"ade jugak yg bikin dgn powerzone tak menjadi.."

saya tau siapa... haha...

---------- Post added at 06:03 PM ---------- Previous post was at 06:03 PM ----------

Is your GB slipping?

gearbox can slip??... or u mean clutch??...

---------- Post added at 06:04 PM ---------- Previous post was at 06:03 PM ----------

4G15 bro. i suspect my GB is dying.

4g15 svdo??..

 

[fstr]

meltan using auto maa heheheh

 

[jombiee]

just throwing you out something to consider.
how about doing some compression test first, its easy. lost compression might be the culprit.
since u have upgrade cam & header etc, you have dyno for AFR right, where is your piggyback ?
sometimes worn out main & con rod bearing & others rotating part will makes your engines heavy & could not go further.
Do you really needs adjustable fuel regulator for your setup ? I dont think so. Why not remove it & tell me if you gain significant results by using fuel AFR.
cheers

 

[meltan7]

Is your GB slipping?

the gear changes are not smooth. slight jerk whenever it changes.

saya tau siapa... haha...

---------- Post added at 06:03 PM ---------- Previous post was at 06:03 PM ----------


gearbox can slip??... or u mean clutch??...

---------- Post added at 06:04 PM ---------- Previous post was at 06:03 PM ----------


4g15 svdo??..

MMC bro.

just throwing you out something to consider.
how about doing some compression test first, its easy. lost compression might be the culprit.
since u have upgrade cam & header etc, you have dyno for AFR right, where is your piggyback ?
sometimes worn out main & con rod bearing & others rotating part will makes your engines heavy & could not go further.
Do you really needs adjustable fuel regulator for your setup ? I dont think so. Why not remove it & tell me if you gain significant results by using fuel AFR.
cheers

haven't got a EMS yet. probably later on. what's the diff between AFR and fuel AFR?

 

[WhiteLighter82]

Me 4G91(manual) also having problems achieving top speed......suppose to be able to hit 180km/h.
But current top speed is only 150km/h - 160km/h........
I wonder if the TPS setting has anything to do with it...........

 

[blind_lan]

gi jer kt Pzone tuh..
say to him...

"bang ape nih bang,..? ckp bleh bg power..160 pn tak sampai..tak kan nak suruh sy sumbat supercharger pulak..??"
"rugila camni.."

hehe... no heart feeling yeh..gurau2

 

[jombiee]

the gear changes are not smooth. slight jerk whenever it changes.



MMC bro.



haven't got a EMS yet. probably later on. what's the diff between AFR and fuel AFR?

argh...sorry, its the same, just remove the afr & test, by using & not using Adjustable Fuel Regulator.

 

[meltan7]

gi jer kt Pzone tuh..
say to him...

"bang ape nih bang,..? ckp bleh bg power..160 pn tak sampai..tak kan nak suruh sy sumbat supercharger pulak..??"
"rugila camni.."

hehe... no heart feeling yeh..gurau2

hahaha.. good point bro!

 

[Shinjite]

Do compression test needs money and not cheap too
So taking out the AFR and test again is the better alternative :)

Mel, time for a manual GB ;)

 

[SkYwAlKeR]

gi jer kt Pzone tuh..
say to him...

"bang ape nih bang,..? ckp bleh bg power..160 pn tak sampai..tak kan nak suruh sy sumbat supercharger pulak..??"
"rugila camni.."

hehe... no heart feeling yeh..gurau2

 

[meltan7]

Do compression test needs money and not cheap too
So taking out the AFR and test again is the better alternative :)

Mel, time for a manual GB ;)

won't the fueling be inaccurate without the AFR?

 

[fstr]

i still can reach 178++ on my stock (same kaler as meltan wira) also wat

your emanage havent tune properly izzit?

what psi is on ur regulator WOT??

 

[meltan7]

don't have e-manage bro.

don't remember the psi setting. will check.

 

[fstr]

mine is at 49psi WOI and 46 WOT

as far as i know from ur description, u are running lean.

have u check ur plugs?

 

[meltan7]

so far, plugs are okay. as in "no subaru sound" wise. i'll check the condition of it.

 

[fstr]

i mean the plugs kaler