Project 4G91

[LeBronJames]

Guys,

Please feel free to give comment. Trying to improve 4G91 Manual stock with the below setup:

1.) Perdana V6 throttle body
2.) 4G93 DOHC stock cam
3.) Adjustable cam pulley
4.) ECU 5660 to ECU 1234
5.) Fuel Regulator

Result. Car is not smooth. When I wanted to start to move the rpm idle will drop from 900 rpm to 100 rpm is this caused by the 4G93 cam or throttle body too big? tq.

 

[GEFORCEXTREME]

I'm guessing its the throttle body or the ECU. Btw, why change ECU?

 

[LeBronJames]

Change ECU because people say ECU1234 is the best for 4G91 follow by ECU5660 and last was ECU7375.

I used to use 4G93 throttle body, everything is good not until the TB solenoid spoil. Now try Perdana V6 throttle body. The pickup is slow a bit but top speed is better.

Could that be the 4G93 cam shaft not compatible with 4G91?

 

[GEFORCEXTREME]

Change ECU because people say ECU1234 is the best for 4G91 follow by ECU5660 and last was ECU7375.

I used to use 4G93 throttle body, everything is good not until the TB solenoid spoil. Now try Perdana V6 throttle body. The pickup is slow a bit but top speed is better.

Could that be the 4G93 cam shaft not compatible with 4G91?

First, ECU is not something you simply take from other cars and plug it in. Each ECU is tailored for each engine configuration, cams, set of sensors and others.

Camshaft, seeing that that the head of the 4g91 and 4g93 is almost similar, I don't think there is huge difference in cam profiles so I don't think it is something that will make your car's RPM go down to 100.

Is the Perdana V6 throttle body same as the 4g91? I mean, do they look the same outside?

 

[LeBronJames]

Looks the same to me. Now I feel like upgrading the intake manifold. Wonder to use Mivec intake or GSR intake. I want add more kick. Heard of Skunk2 and also B16B intake, that might not be suitable for daily drive.

 

[GEFORCEXTREME]

Looks the same to me. Now I feel like upgrading the intake manifold. Wonder to use Mivec intake or GSR intake. I want add more kick. Heard of Skunk2 and also B16B intake, that might not be suitable for daily drive.

Get skunk2 intake replica, they're cheap nowadays. They say MIVEC intake is different from GSR intake, so don't know can fit or not. If you want GSR Turbo intake, I have one.

 

[calvin9683]

I honestly dunno wats the difference n if there's any noticeable improvement from the ecu change... I'd believe a rechip or better a piggyback would give u more improvements...
I've used 4g93 cams on my old 4g91 last time wif evo 60mm throttle body... No idling issues...
Try digging some old threads in the 4g91 gang thread... Some of them said GSR intake is the best...