Fairlady piston

[zulfadly]

guys,i need your help..

i use evo engine and fairlady piston..but i have a big problem with my engine..1st,my fairlady piston always crack at piston ring..2nd,my compression is too high=14.3..i use evo crank and vr4 conrod..but i was modified a conrod to make a piston go up level with my block..i want suggestion anybody use a evo engine with fairlady piston..

 

[zulfadly]

guys,i need your help..

i use evo engine and fairlady piston..but i have a big problem with my engine..1st,my fairlady piston always crack at piston ring..2nd,my compression is too high=14.3..i use evo crank and vr4 conrod..but i was modified a conrod to make a piston go up level with my block..i want suggestion anybody use a evo engine with fairlady piston..

 

[DonJuanDeMarco]

bro..

it not the right way to tune you ebo...

firstly decide how many Hp & torque do you want to..then select the material..
2nd do the calculate compression ratio (not the CR test)..if turbo the cr 8.1 to 8.6 depend
how big your turbo & the hp that u want to do...

last do the BLUEPRINT & BALANCING..

 

[zulfadly]

now my evo hp is 4++..how to calculate a cmpression ratio?and i use AR50 trbo..so how to solve my prblem?plz tell me detail..coz i want rebuilt my engine in thiz month..

 

[DonJuanDeMarco]

your tuner should know leerr...

 

[killerloop25]

Don Juan,
Please help explain to us how you calculate compression ratios? Do we need any special tools or etc?

 

[zulfadly]

yup..the cmpression ratio must know when rebuit the engine..so why you say the tuner must know?now my question is how to calculate the cmpression ratio?n not who know to calculate the cmpression ratio..:rolleyes:

 

[n/a_tune]

u send yur block to gt auto lah,, orr pm me,,, not more garage know to calculate c/r la,,

 

[jinkl]

hehehe just wanted to say a quote
"material , kite orang pilih" hehehehe :wavey:

 

[killerloop25]

Question here is how to calculate compression ratio since compression ratio was mentioned earlier. Its very true that not many w'shop know to measure compression ratio. FYI....sending your block alone to GT Auto won't help get your compression ratio.

Bump: Question here is how to calculate compression ratio since compression ratio was mentioned earlier. Its very true that not many w'shop know to measure compression ratio. FYI....sending your block alone to GT Auto won't help get your compression ratio.

 

[zulfadly]

yes..but now i want to know why my cmpression is to high when i use vg piston..so now i need your help what i must do to use vg piston in low cmpression..bcoz 3 times my vg piston crack at piston ring..i use 1.5mm matal gsket..n 280deg cam inlet & ext..but i modified my cnrod to make a piston go up to same with my top block..if i not modified my cnrod,the piston not go up same at my top block..n i use evo crankshaft..so the question is why my vg always crack..what a problem?what i should to do to safety if i use vg pston..so u all plzz give me ur suggestion to me..i really penng kpala think about that..

 

[DonJuanDeMarco]

fomularnye

J2 x Bore x Stroke =( ) devide CV

ok....

 

[zulfadly]

yes..but now i want to know why my cmpression is to high when i use vg piston..so now i need your help what i must do to use vg piston in low cmpression..bcoz 3 times my vg piston crack at piston ring..i use 1.5mm matal gsket..n 280deg cam inlet & ext..but i modified my cnrod to make a piston go up to same with my top block..if i not modified my cnrod,the piston not go up same at my top block..n i use evo crankshaft..so the question is why my vg always crack..what a problem?what i should to do to safety if i use vg pston..so u all plzz give me ur suggestion to me..i really penng kpala think about that..

 

[killerloop25]

Huh.....fomularnye

J2 x Bore x Stroke =( ) devide CV

Are you sure or not bro....hope you're not misleading us. Don't end up one blind person leading another.

 

[chrissyong]

custom make your piston cut abit firing surface and use 2mm gasket maybe will help u abit haha

 

[DonJuanDeMarco]

bro..

it not the right way to tune you ebo...

firstly decide how many Hp & torque do you want to..then select the material..
2nd do the calculate compression ratio (not the CR test)..if turbo the cr 8.1 to 8.6 depend
how big your turbo & the hp that u want to do...

last do the BLUEPRINT & BALANCING..

this the answer for your question bro....
tak paham gak i dont know wat to say anymore.....

Bump:

Huh.....fomularnye

J2 x Bore x Stroke =( ) devide CV

Are you sure or not bro....hope you're not misleading us. Don't end up one blind person leading another.

hahahhahahha

 

[killerloop25]

Sorry lah bro....but that's not the way to calculate compression ratio....sorry but your formula is irrelevant.

Moving ahead....which piston is giving you trouble? There are 4 of them so which one is the problem one? Was the fairlady pistons recommended by your mechanic?

 

[Nats autoparts]

guys,i need your help..

i use evo engine and fairlady piston..but i have a big problem with my engine..1st,my fairlady piston always crack at piston ring..2nd,my compression is too high=14.3..i use evo crank and vr4 conrod..but i was modified a conrod to make a piston go up level with my block..i want suggestion anybody use a evo engine with fairlady piston..

you may have those piston ring gap wrongly - too tight - thus causing expansion overly and cracked the piston ring
reason supporting for this may due to

-fuel
-spark plug
-turbo
-tuner

 

[tajulsans]

i'm wondering, how do u actually know ur CR is 14.3..

 

[Havok_KiD]

i am wondering why are u having so much issue with VG piston
i have been running a 2.2l crank with vg30 piston.....whacking on gt30r turbo samo
i am using 1.5mm metal gasket...all the way till i sold my engine it was working fine...
there would be only 2 reason for me if the piston melt at the side is
1) your fuel is not enough to support your hp
2) your tuning or its been set up rongly
as far as i know vg piston can take high pressure and i was whacking at 1.5bar happily...

anyway its my 2 cents bro