How many 7A user here?

[normality78]

Would like to know how many bros out here is either having 7A engine conversion done or experince with 7A engine. I do have some question needed sifus help here.

 

[tom's]

in here i don't think so........but someone already did 7A 20v and another 7A 20V turbo..............tried the turbo but not the na.......power..........

 

[turbo10]

HI bro..my engine converted to 7agze last year and never faced any problem since.i also got a fren with 7agte and a fren with 20v blacktop 7age..torque wise..it's very torquey and even in 5th gear u can really feel the difference..but i guess for a 20v the upshift point should be lowered from 8000rpm to 7800 rpm because it loses breath a bit due to long stroke compared to 4ag but that doesnt effect much to it's power gain (the engine is standard except fot the block conversion).from my experience driving it, the difference from 4ag are quite significant..reliability wise..the conversion of the 20v already passed the 1 year mark without any problem to the engine although constantly abused and the car entered some local drag event and managed to get cups on some event..i dunno..some people think going for 7a is not a good solution for some reason.mebbe they are right but for me..driven it and competed with it..i think it's quite impressive..mebbe 'mat salleh' is right.."there is no substitute for cubic inches" or in metric - "there is no substitue to c.c " hehehe..and i believe a lot of sifu inside here are playing with 7a..from sabah and sarawak the most like notorius 400+ hp sifu nos_7agte, te27 and more..

 

[normality78]

torque wise..it's very torquey and even in 5th gear u can really feel the difference..but i guess for a 20v the upshift point should be lowered from 8000rpm to 7800 rpm because it loses breath a bit due to long stroke compared to 4ag but that doesnt effect much to it's power gain (the engine is standard except fot the block conversion).quote]

yeah, i 100% agreed with it. the torque was simply amazing. even in the final gear, u can feel the diff. however, this is my problem. As u mentioned it loses breath abit due to long stroke, mine wasnt abit. its hell alot.

it was pulling amazingly all the way till 4500rpm but after that it started to lose it breath. it just wun go anymore after it reach 5000rpm. Well it will go but damn kao slowly and my speed meter isnt climbing as well so no point.

im still using back my stock 4AFE throttle body and ECU. could that be the reason? my mech suspect could be running lean on that high band. what do u think?

 

[LevinTE27]

urs is 7AFE is it? 4AFE ecu?
no idea..should settle all ur ecu, fuel system first, then u go trouble shot..
nothing is easy as u just swap the block then u got the gain.

FE head is not for racing, the most u can go is 6krpm on 4afe, with longer stroke now it wont rev as high as 4afe does , it cant breath enough air at high rpm.

 

[turbo10]

i think it needs more air.y dun u try to fit the 7afe intake?when we done the 20v, we also faced the same problem..and got knocking summore..we swapped the injectors to 1jz's injectors and re-adjust the fuel regulator,adjust abit the campulley..the problem gone..but not all because it still loses breath around 7800 upwards..but better than loosing as early as 5000rpm.at last quicker than before...much quicker.felt relieved because before settle it seems like it;s a mistake changing to 7a..but now really satisfied.y dun u try tuning using wideband sensor..from there u'll know wether it's lean or too rich..just my 2 cents

 

[normality78]

urs is 7AFE is it? 4AFE ecu?
no idea..should settle all ur ecu, fuel system first, then u go trouble shot..
nothing is easy as u just swap the block then u got the gain.

FE head is not for racing, the most u can go is 6krpm on 4afe, with longer stroke now it wont rev as high as 4afe does , it cant breath enough air at high rpm.

im using 4AFE ecu here. i do know FE head is not for performance but i the thing is on my 4aFE head, i could rev to 6000rpm without problem but now this cant even rev over 5000rpm. I do understand about the 7A haing longer stroke hence it may not be able rev as much as 4A but it cant be as bad as this right?

 

[normality78]

i think it needs more air.y dun u try to fit the 7afe intake?when we done the 20v, we also faced the same problem..and got knocking summore..we swapped the injectors to 1jz's injectors and re-adjust the fuel regulator,adjust abit the campulley..the problem gone..but not all because it still loses breath around 7800 upwards..but better than loosing as early as 5000rpm.at last quicker than before...much quicker.felt relieved because before settle it seems like it;s a mistake changing to 7a..but now really satisfied.y dun u try tuning using wideband sensor..from there u'll know wether it's lean or too rich..just my 2 cents

bro,

im not just swapping the block but entire engine. so im using 7AFE intake manifold except the 4AFE TB. there r plp advised try to swap back the 4AFE head and see how.

im glad that you do experinced it. So its the same only can rev up till 5k intially until u've done something on the fueling side? did you guys change fuel pump as well? so far, on all respond i have, its all advised to change ECU but i think to get 7A ecu is not that easy.

 

[BlackSamurai]

i thought it's a SPM thread. :p pai seh.

 

[PuristOfRacing]

nice info. im using 7afe as well. try drag with 4agze but i lose naturally. need more power. my question is this, going for the g head, 16v and 20v how much difference? does the 20v bring significant advantage?

 

[normality78]

purist bro,

I do thought of this before. As u know as you're using the 7A now, the up front torque was amazing. however, frm the info i get, once we change to GE head, the torque band will affected and we will not be able to enjoy the torquey anymore.

 

[PuristOfRacing]

so to extract more power from 7a is to go force induction?

 

[normality78]

u can say so. i may looking in supercharged it but my mech dun reco it

 

[PuristOfRacing]

why not? there a guy name rolla pat in club4ag have done it and with good result.

 

[normality78]

me mech said alot of bracket need to custom made

 

[PuristOfRacing]

we should meet man. btw, why my top speed only 180kmh?

 

[normality78]

hm... i havent try out my top speed yet. you're using 7AFE ecu?

 

[turbo10]

i've already had 7agze in my lump and now going for turbo...what i can say the block is not much differ from the 4ag,i did mod the bracket but only to plug in the sc14 blower..

 

[PuristOfRacing]

yes im using 7afe ecu. turbo10, for 7agze conversion, what g head is best? can the 4agze be fitted without much difficulty of the oil squirters?

 

[LevinTE27]

oil squirters is not important, as long as u run good oil then it will be ok,
u need bigger sc to feed a 7ag, if not u will end up "REGRET". sc12 is cant even feed enough air for 4agze above 6000rpm, dont talk about 7ag longer stroke hahaha..
turbo is a best choice.