Hi guys,
I m currently in the planning stage of a bolt on turbo for a 4g15 efi engine on a proton wira. Im still in the designing and idea stage,just want to bounce some ideas about and see if its feasible and what are the modifications that need to be done.Im hoping more of you senior members,especially those with experience in turbos to give me some constructive comments.
Here are the parts im able to source if i decide to go ahead:
-TD04 single fin
-GSR intercooler
-Turbo manifold
-Intercooler pipings
-Exhaust downpipes and other connections
Ive friends in workshops who are willing to get the piping work and other connections done for very minimal,what im concerned in is the fuel supply requirements.
What i dont know is the stock 4g15 engines fuel pumps maximum pressure and the injectors max cc.
Besides that,whats an appropriate AFC that can be used effectively for tuning.(Currently looking into SAFC)

Please bear in mind that this is still in the planning stage and im just trying to gather as much information as possible.I dont really want comments like change your engine or dont waste your time as ultimately this is my decision,not yours and Im intrested in a BOT,not swapping my engine.All others are welcome to discuss,help,give constructive comments and learn together.
Thanx guys.

Forgot to add, intially im looking for a modest 0.3bar of boost.Sounds pathetic,but i wanna learn to walk before i can run..

(Any one with a BOT 4G15 who is willing to spare some time to show me his setup will be treated to some Starbucks and hailed as god )

This post has been edited by ryan_hustler: Nov 3 2008, 05:48 AM

cool. I'll keep an eye to this thread.

just a question, you dont intend to swap the pistons for a reliable pistons which meant for turbocharged engine?

Or you want to stick with the standard pistons and thinking of ceramic-coating it? Ceramic coating could help in making the piston able to stand more heat and more rigid. Not really sure tho. But the price..

I think you need a thicker head-gasket too.

Also, you need fuel pressure regulator besides fuel pump. Sorry, I dont know 4g15 fuel pump rating and the injectors cc. Perhaps its 375cc?


hmm.. I wonder, does SAFC is enough to give the needed tuning with fuel and ignition timing? I mostly think that an e-manage should give a better outcome.

wait for tuning experts to give more details.

I have considered the pistons and head gasket,but the main reason they seem to fail is from detonation.I figured if i can get an adequate fuel supply and keep temperatures to a low with proper intercooling and suitable spark plug heat range,it wouldnt be a problem. Thicker head gaskets can reduce the compression ratio,which for a high strung turbo application would be a good idea,i just dont see the logic for one with what i want to achieve.

As for e-manage,yea i guess it has more points,but im not too versed in AFC's.Thanks for the feedback man.All points taken into consideration.

change your engine AND dont waste your time

or u enjoy conrod shooting out from your block?

ahh..an idiot.i was wonderin where they were..

so much effort on it..and stock 92 mivec or 93 dohc will still pass u like u never existed..not need to say gsr

the risk of getting conrod flying out...plus higher fc than gsr when using afc to tune fuel..

1 week = 3days car in workshop, 3days on the road, 1day being towed

all this happen to my fren who bolt on his 93 na

This post has been edited by thelulz: Nov 3 2008, 10:14 AM

That line says it all.Im guessin you have a 2fast 2 furious complex?

if not for the performance why u want bolt on? for saving the earth?

oh ya..not yet finish..enjoy the tok-tok-tok-tok con rod bearing sound

having oil in ur radiator is fun too..good luck getting that head gasket changed

This post has been edited by thelulz: Nov 3 2008, 10:31 AM

Hi Ryan.
Just go on with your project.

I had a member which even did BOTs on a unmodded, stock Nissan Sunny 1.5L block.Low boost of course

But I think you need new, and bigger CC injectors to cope with the "boost on" fuel supply demand.
And you will need a new computer box, I dont think the standard Wira ECU can cope with the new,added increase of fuel supply demand and AFR.

All the best.

This post has been edited by SleeplessEyes: Nov 3 2008, 10:35 AM

Hey bro, based on calculations, with 0.3bar, the hp will be border lining on 100hp.I have calculated the cc/injector for 100hp,prob is i dont know the original value to know if it can sufficiently meet the fuel demands.
As for computer box, im goin with a piggyback

---

Added on November 3, 2008, 10:55 amMost active in Kopitiam
( 50 posts / 44% of this member's active posts )
hey child,this isnt kopitiam la..

This post has been edited by ryan_hustler: Nov 3 2008, 10:55 AM

i am just saying what is happening in the real world

good luck getting pwned by kancill tebo with ur 4g15 bolt on

I give up,just keep spamming child.

jangan layan. continue this discussion, maybe i can get BOT on my 4g13 as well.

now where's the sifoo?

Oh i forgot to add,BOV and variable fuel pressure controller. Dont know much about the latter,it doesnt function as a fuel pump right? only increase/ decrease the fuel pressure based on how much boost is produced?

from my little knowledge, fuel regulator just to ensure the fuel pressure remains constant while full boost. Running lean is not what every ones want. If you know what I mean..

fuel pump is to pump the precious fuel and to be burnt and gives the powah... lol

vr interesting yet quite common project...
yeap, all the setup u mentioned feasible...
dont forget ur BOV... u need to stand out from the crowd and be noticed when u have a turbocharged engine... heck, even tiny L2s blowing their BOV a few times in a vr short stretch....

btw, ur car is svdo rite??... safc wouldnt be helpful here i guess.... couldnt think of alternative fuel computer now which can "piggyback" ur svdo, unless u willing to go for standalone ecus... hehe...

compression ratio... ahh... as we all know forced induction engines need low compression... perhaps u can source for thicker head gasket... of coz if its made of metal would be definitely better.....

as for ur fueling... i would recommend u to get uprated injectors such as mivec injectors.... good to upgrade throttle body as well if it is allowable (since urs is svdo, i dont have much info on upgrading it)... oopss....

i think ur oem fuel pump is manageable... get a fuel pressure regulator as well....

as for boost level, try be conservative and run it at lower boost for sometime and see whats what... if everything goes well, slowly increase ur boost level moderately...

bot 4g15 mmc quite alot and i would say rather easy project.... but svdo, i'm not sure...

in sabah, they used to run 4G15 tebo with AE92 4AGZE MAF ecu

change to 4agze cam angle sensor, injector, maf, coil pack, throttle position..

it can detect boost and inject the correct amount of fuel unlike 4g15 na ecu

some ppl just dont understand the beauty of modifying ur engine maximising it's potential..

if everything is done right, you won't have reliability problems

You guys monitor your oil temp most of the time? question refers to all BOT users