4g91 modification

calvin9683

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emanage + safc???
care to explain wat's the use of having 2 different type of piggyback???

oni heard before ppl fit waja crank for their 4g15....
never heard before fit in 4g91...mayb i too noob edi.....

as for pistons....y get gen2 pistons while u can choose to use 81mm from 4g92/93 SOHC/DOHC/Mivec????

porting head to me can feel very minimal improvement....
4g93 cams + setting cam can feel a bit of improvement....
piggyback sure can feel the improvement in terms of power n fc....
 

speed2horizon

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i new kaki play 4g91, pls give some advise for me :wavey:
my current MOD i already put:
+ adj cam pulley
+ 2" piping ( haven get extractor )
+ light wheel pulley
+ fuel regulator
+ apexi filter

May i know e-manage or SAFC for long term use, which better for me to buy?
Can PM me, soli for the trouble :wavey: ?

+ apexi mushroom filter
basically, e-manage n safc are also piggyback. But the parameters involve in tunning are different. An safc is user tuned based piggyback. It only involves rpm n +- fuel with 2 different throttle position. Hi or low throttle. So, total 16 set point.

Where e-manage is more sophicated. It involves rpm, throttle position in percentage, input of fuel injection n also reading for maf/map. So, total of 256 set value. So, which one do u think would be more reliable in the product's reliability.

hi bro, i m new here,
juz wanna ask u about ur conversion...
what type of car u r convert to 4g91 wira or saga?
is that any problem with ur old fuel tank?

sorry zero knowledge about car....

tq
fuel tank should be given together with the halfcut. If using iswara, just change the fuel pump.

Hi :wavey:
Actually i just use this 4g91 no long time. This 4g91 i very like it cause compare with stock 4g15 very big gab. About fuel so far almost like time use 4g15. I use wira aeroback with 4g91. Halfcut thing, you need search make sure that thing you want is ok, example like get yourself wife :)
I been thinking get a extractor 4-2-1 for him. Later on go for e-manage to him too.
heard Jian Hang at batucaves created a set of 4-2-1 for campro @ neo according to the mugen design with the bryon detachable. Heard he say will feel the engine lighter.

emanage need together with safc easy 4 u to setting,if u buy 1 off the mngmnt all same coz still piggyback...suggest emange...if u have money better buy microtech use stand alone much better!!..
try + high cam
+crankshaft waja
+pston 1.6/gen2
+Porting head
+Important do cam timing..!

see the result..
high cams?? Gti/putra cams already have higher lift compare to 4g91. To achieve a 1.6 stroker, all u need is the bore up to 81mm. Cause the stroke are the same as 4g92 mivec, 77.5mm. By choosing 4g92 mivec pistons, u'll achieve 1.6L with 11:1 compression ratio. High enough for an NA. Equivalent to vtec b16b. So, why gen2 pistons? Piston pin all different, why all thVe hassle where u can use something plug n play...

Porting head is something relative to individual. But a proper port n polish will require a bench flow test to make sure the flow in each port n runners are even. So far, only matspeed n nasty port flow have the benchflow.

E manage + safc??? WTF is that? Microtech??! No need la. The ecu good enuf to handle.

Btw, bro please give correct infomation n not just bantai only. Some ppl really get info from Zth. But if thigs.

emanage + safc???
care to explain wat's the use of having 2 different type of piggyback???

oni heard before ppl fit waja crank for their 4g15....
never heard before fit in 4g91...mayb i too noob edi.....

as for pistons....y get gen2 pistons while u can choose to use 81mm from 4g92/93 SOHC/DOHC/Mivec????

porting head to me can feel very minimal improvement....
4g93 cams + setting cam can feel a bit of improvement....
piggyback sure can feel the improvement in terms of power n fc....
if the BTDC of the cams are set properlly. Can really feel the diff.
 

metal333

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Jun 9, 2009
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bro not bantai lah!.....already do R&D with 4g91 engine also test in drag race...result is excellent
Come on lah open minded this forum for discuss&share ma....i got my xperience so just suggest lah here..if cant accept my suggestion is up to u lor...try 1st& see de result...

de stndard ecu enough but for get more powerfull result try standalone..u can satisfied..

aiyaaa!!byk susah lah ini olang..all cannot...
 

speed2horizon

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bro not bantai lah!.....already do R&D with 4g91 engine also test in drag race...result is excellent
Come on lah open minded this forum for discuss&share ma....i got my xperience so just suggest lah here..if cant accept my suggestion is up to u lor...try 1st& see de result...

de stndard ecu enough but for get more powerfull result try standalone..u can satisfied..

aiyaaa!!byk susah lah ini olang..all cannot...
So, u use e-manage + safc in ur drag and rnd..?

Here are some basic specification of the engine and parts u mentioned...

MITSUBISHI 4G91
78mm X 77.5mm(BXS)

CAMPRO S4PH
76mm X 88mm(BXS)

MITSUBISHI 4G18
76mm X 81.3mm(BXS)

How do you put a smaller pistons into a bigger bore and u expect it to compress..? Add on sleeves..? And the sleeve is 2mm thickness...?

Please educate me...
 
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metal333

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all already test for drag..to get much better powerfull use stand alone lor..
depend owner budget lah...

Bro, sorry my mistake lah!!!...aiyaaa...i though 4g15...this topic 4g91.....
SORRY!!..hahaha:banghead:.....aduhai!!!!
 

speed2horizon

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all already test for drag..to get much better powerfull use stand alone lor..
depend owner budget lah...

Bro, sorry my mistake lah!!!...aiyaaa...i though 4g15...this topic 4g91.....
SORRY!!..hahaha:banghead:.....aduhai!!!!
No worries. We all make mistake...

BTW, bro boy2900 and hb015369 may use their car for daily drive... So...
Not necesary to upgrade to standalone...

Set up is all depends on the purpose of modification. So, there is not 1 fix set up for 1 race car/engine...
 

hb015369

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Thank speed2horizon, metal333 & other ahbang suggestion :)
I think i will go to emanage, & 421 extractor 1st. coz budget problem.

---------- Post added at 03:53 PM ---------- 6 hour anti-bump limit - Previous post was at 03:50 PM ----------

No worries. We all make mistake...

BTW, bro boy2900 and hb015369 may use their car for daily drive... So...
Not necesary to upgrade to standalone...

Set up is all depends on the purpose of modification. So, there is not 1 fix set up for 1 race car/engine...
Yes..i use for daily drive, so i think i won`t go to stand alone MOD. I want my 4G91 became more lighter than b4.
 

asid_b

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i just got 4G91A for my wira.. what must i do to make the engine more lighter than std ones.. i just change my muffler to MIT twintip ones..

i've plan to fit in powerzone tuned length/Wira Se extractor.. is there anyone selling it around putrajaya and how much is it in the market?
 
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contreasjun27

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i just got 4G91A for my wira.. what must i do to make the engine more lighter than std ones.. i just change my muffler to MIT twintip ones..

i've plan to fit in powerzone tuned length/Wira Se extractor.. is there anyone selling it around putrajaya and how much is it in the market?
powerzone extractor is a good modification
if you want alternative try to search for zth member call zendengoh he do sell aftermarket extractor too...price is cheaper than powerzone and the performance not bad as well...

to make your engine lighter and better pick up maybe you can try to buy lighten crank pulley
 

speed2horizon

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Thank speed2horizon, metal333 & other ahbang suggestion :)
I think i will go to emanage, & 421 extractor 1st. coz budget problem.

---------- Post added at 03:53 PM ---------- 6 hour anti-bump limit - Previous post was at 03:50 PM ----------



Yes..i use for daily drive, so i think i won`t go to stand alone MOD. I want my 4G91 became more lighter than b4.
With tunning, u can achieve better AFR. With a better AFR, engine feels lighter and fuel efficiency also better.

i just got 4G91A for my wira.. what must i do to make the engine more lighter than std ones.. i just change my muffler to MIT twintip ones..

i've plan to fit in powerzone tuned length/Wira Se extractor.. is there anyone selling it around putrajaya and how much is it in the market?
FOr both of you, u want to fell the smoothness of the engine, send your engine for balancing use better bearings, example Kings racing and ACL racing. But those bearing are 2X the $$$ compare to the good bearings like ALUGLIDE... Good, Economical and durable, try looking for ACL DURAGLIDE.

But only worth doing it before the engine went into the engine bay or when u need to do a overhaul.
 

contreasjun27

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With tunning, u can achieve better AFR. With a better AFR, engine feels lighter and fuel efficiency also better.



FOr both of you, u want to fell the smoothness of the engine, send your engine for balancing use better bearings, example Kings racing and ACL racing. But those bearing are 2X the $$$ compare to the good bearings like ALUGLIDE... Good, Economical and durable, try looking for ACL DURAGLIDE.

But only worth doing it before the engine went into the engine bay or when u need to do a overhaul.
bro mind to explain more on the bearings? how does it function to make the car run smoother compare to the stock bearings?
 

speed2horizon

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bro mind to explain more on the bearings? how does it function to make the car run smoother compare to the stock bearings?
Err.... Different series bearings are made of different composition materials and receipe. Bearings looks all the same with bare eyes. However, u can see used bearings with some scrathes on the contact surface may have different color.

Regarding the race bearings improving performance/making the engine feels lighter. Example, The ACL bearings. The ACL Race Series Bearings contain an X suffix have an extra +0.001" oil clearance. So, the engine run smoother...
 

contreasjun27

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Err.... Different series bearings are made of different composition materials and receipe. Bearings looks all the same with bare eyes. However, u can see used bearings with some scrathes on the contact surface may have different color.

Regarding the race bearings improving performance/making the engine feels lighter. Example, The ACL bearings. The ACL Race Series Bearings contain an X suffix have an extra +0.001" oil clearance. So, the engine run smoother...
oh i see i see bearing do play important role eh...
haha ACL bearing is so expensive haha sob sob cant afford to do buy it at the moment
 

speed2horizon

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oh i see i see bearing do play important role eh...
haha ACL bearing is so expensive haha sob sob cant afford to do buy it at the moment
No need to buy n use it purposely la... When u rebuild or overhaul ur engine, then plunk in 1 shot. Save the labour ma...
 

skytech

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To all sifu , Want to ask .

Can 4g93 airflow sensor and also fuel injector 240cc install at 4g91 ?

My 4g91 still stock stock ecu, stock wiring , and stock engine . Only gearbox is 4g93 .

If i put the 4g93 airflow sensor and 240cc , what will happen ?
 

speed2horizon

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To all sifu , Want to ask .

Can 4g93 airflow sensor and also fuel injector 240cc install at 4g91 ?

My 4g91 still stock stock ecu, stock wiring , and stock engine . Only gearbox is 4g93 .

If i put the 4g93 airflow sensor and 240cc , what will happen ?
No point, waste time, waste fuel...
Engine running rich. And will feel heavy. Iddling rich...
 

skytech

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OOO, N what about 4g91 auto ecu and 4g91 manual ecu , izit same function ?

Can i plug in 4g93 ecu in 4g91 ?
 

speed2horizon

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OOO, N what about 4g91 auto ecu and 4g91 manual ecu , izit same function ?

Can i plug in 4g93 ecu in 4g91 ?
Well, every engine set up will have their own ECU setting or mapping. 4G91 manual and auto is different. But they can be used. Auto ECU are tuned a very slightly richer to overcome the load of the Auto gearbox to provide better power. Provided air is sufficient.

4G93 ecu can plug n play... but just imagine. U have a horse, it consumes 100KG grass/day for normal activity. All carbo will be consumed fully. But suddenly, u felt itchy and forced the horce to eat 130KG/day for the same activity... Where do u think the remaining 30KG of carbohydrate will go..? come out from the back right..? As shitz....

U operate the horse with a bigger brain and a bigger lung... But the activity will still the same.... Unless, u change the heart with a higher metabolism and can pump faster...

Why la u wanna do that..? It won't be more powerful...
 
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