4G15 tuning and related info

Dave · Posted: Fri Mar 17, 2006 7:34 am Post subject:

there u go, average cost for a homemade/bamboo project is $4-6k

as for the tranny, since its not a sudden onslaught of power as in the case of NOS, a tranny cooler independent of the stock one would suffice

Rudman · Posted: Fri Mar 17, 2006 7:51 am Post subject:

venum · Posted: Fri Mar 17, 2006 8:28 am Post subject:

^^^ considering carefully

blazing · Posted: Mon Mar 20, 2006 7:57 pm Post subject:

Rudman · Posted: Tue Mar 21, 2006 7:30 am Post subject:

^^ You did the upgrade? ABS in your setup as well? Im interested, what other parts did U have to swap out? Master cylinder or just front spindles and calipers?

No ill effects with ABS afterwards?

BTW, what hole spacing did the spindles come with, 4 x 114? What's the minimum rim clearance needed for the rotors, 15"? We talking new rims if U don't have 8 hole universal?

venum · Posted: Thu Mar 23, 2006 9:26 pm Post subject:

Ok

latest research into some acceleration improvements

consulted my mechanic, whose mitsu advice I consider greatly and in high esteem.

he advised me of some extractor work

was thinking bout using a 4g92 stock header

but we think that it may not work, we need to measure it though, so this is yet a hypothesis until measurements proove it

the 4G92 stock headders are 4-1 and therefore not well adapted to the application that i want.

in keeping with my desire for low-end torque improvement

4-2-1 extractors, 1.5" mandrel bends

2" down pipe and a free-flow exhaust

also, if the $$$ running freely (which it currently is not)

3-angled head shaving - looking to take out bout 1/8"

saw a Evo head that he had shaved, quite nicely done

so my question is, where can I have the extractors made?

any thoughts on this improvement?

will post a pic of the stock exhaust manifold as soon as I can

the heat shield has been removed temporarily

Dave · Posted: Fri Mar 24, 2006 7:39 am Post subject:

the 4g92 is not a header and doesn't even begin to comapre to what the aftermkt makes, they actually disturbed flow in one pipe to make way for another, first rule of a good aftermkt header broken

shaving the head would make for possibly wrong cam timing and thus would require the need for cam sprokets to dial back in the cams

Rudman · Posted: Fri Mar 24, 2006 8:17 am Post subject:

Hmmm..........this thing getting expensive now boy, adjustable cam sprockets with that upgrade.

Venum, U ever check uot the RPW website? They list a number of stage1 (5psi) stage2 (8psi) etc upgrades for the 4G15 SOHC engine.

I think it might give a good idea of the work that needs to be done, and how an engine swap (they recommending a 4G93) might be the first thing to start with. There's only so much U could do with the DOHC 4G15. If U looking for moderate gains, upgrade it. If U looking for more, U might have to start with an engine swap.

my 2 cents, but check out the RPW site, its good reading.

RA40-GTE · Posted: Fri Mar 24, 2006 8:44 am Post subject:

^^ once he starts to order from rpw be prepared to shell out plenty $$...not worth it IMO in a 4g15. By the time cams etc ordered and shipped, he practically pay for a 4g93 sohc engine and box..

rpw no doubt has the knowledge, but its the $$ that will kill Crying or Very sad

if its just a small increase you looking for, slap on the turbo with stock internals and small psi..best bang for the buck there.

venum, just careful you dont end up spending 5-6k on an engine worth prob 2k and still not get the performance that you want..

invest in a v6 Wink

just kidding

EDIT: oh, rudman, thanks again for the manual, coming in very handy

Rudman · Posted: Fri Mar 24, 2006 11:46 am Post subject:

Yea man, no probs. Glad to help out a mitsu bro. After seeing how a V6 engine fit up in the CK engine bay, I really thinking an engine swap is one of the better ways to start from a DOHC 4G15.... Very Happy

venum · Posted: Fri Mar 24, 2006 12:43 pm Post subject:

Here is a copy of an e-mail conversation between myself and an RPW representative concerning the engine performance improvements

----- Original Message -----
From: "Shawn Bridglal" <venum4802@yahoo.com
To: "RPW Representative" <rpwinfo@iinet.net.au
Sent: Thursday, March 09, 2006 11:20 AM
Subject: performave improvements for a 4G15 DOHC

Name: Shawn Bridglal
Country: Trinidad & Tobago
State: Other
Alternative means of contact: Very Happy

-

Make of Vehicle: Mitsubishi
Model of Vehicle: Lancer
Year of Vehicle: 1999
Motor Capacity: 1.5L
Cylinder head: SOHC
Model of Motor: 4G15
Any Modifications done to date: RPW Short Ram free flow intake
Future plans of vehicle: to be determoned

Their Message:
I have a car as specified in the detalis above. It is the CK2A model Lancer.

The car is currently totally stock, with teh exception of an RPW Free-flow intake and an OBX cone air filter.

I would like to further modifiy the engine and suspension to produce greater torque and acceleration.

I am not interested in modification to increase my top speed, but mainly the acceleration.

I have one RPW performance accesory and I am quite satisfied.

I would like to inquire about the diferent products that you stock, to increase the performance of my car.

all your advice is welcome

Thank You

Shawn

RPW's Response:
We do manafacture for this a RPW 4-1 race extractors, whic I recomend
Followed by a FSE Fuel pressur regulator and then a RPW 55mm throttle
body upgrade

----- Original Message -----
From: Venum
To: David Thomas
Sent: Saturday, March 11, 2006 12:15 AM
Subject: Re: performave improvements for a 4G15 DOHC

Mr. Thomas,

Thank you for your response.

Could you supply estimated performance improvements that can be expected with the addition of the quoted performance parts.

please treat my car as stock, if necessary, that is ignore the existing RPW Short Ram intake

please include a link to a catalog if possible

Thank You

RPW's Response:
Usually he package of twin tb, rpw extractors and fuel pressure reg with exhaust will take car up to around 100kw at teh flywheel

I have the RPW parts catalog if any one wants it, just PM me with an e-mail address and I will e-mail it to you

I do not think that I will be interested in sourcing parts from RPW - too much $$$

so going local with this opne, or aftermarket that is not as $$$

RA40-GTE · Posted: Fri Mar 24, 2006 12:55 pm Post subject:

^^ check ur pm buddie Twisted Evil

blazing · Posted: Sat Mar 25, 2006 12:28 am Post subject:

venum · Posted: Sat Mar 25, 2006 3:31 pm Post subject:

did a lil looking around for a place to have the extractors made

the most popular place in south - Imraj Bro quoted the following for me:

4-2-1 extractors (1.75") - $800.00
not mandrel bend, but the bends would not have kinks in them

2" downpipe - $800.00
from the end of the manifold to the muffler
inclusive of resonator

free-flow muffler - $800.00
or I can get my own muffler

aluminized pipe

the O2 sensor also gonna be returned to its original position

I asked bout replacing the heat shield

he advised that I remove it to allow better air flow

cuz the heat build up cracks the pipe

I thought that the purpose of the heat shield is to prevent the following:

1. hands touching the hot manifold and resulting injury

2. heat from getting to the radiator

IMHO, not bad for the headder or the muffler

but I think that the down-pipe is a lil high

any opnions?

still have a couple of places to check

Rudman · Posted: Sat Mar 25, 2006 7:45 pm Post subject:

O.K Blazing, where does one look to get a pair of eclipse front rotors, calipers and a master cylinder in Trini? How does the caliper offer up if the spindle is not changed?

The same length of brake lines would work back in the front, or these will have to be changed as well?

Dave · Posted: Mon Mar 27, 2006 7:32 am Post subject:

again don't make an extractor for this engine
what is the stock style of the manifold
4-2-1 or 4-1

venum · Posted: Mon Mar 27, 2006 8:51 am Post subject:

Dave,

the stock is a 4-2-1

will post a pic when I can

why not make extractors?

Dave · Posted: Mon Mar 27, 2006 8:56 am Post subject:

you cannot get a properly made one here esp if not mandrel made
late model cars have pretty good flowing manifolds and thus any made up unit can easily detune the engine
thats good then
wait for it......

scooby · Posted: Thu Mar 30, 2006 10:49 am Post subject:

what about a chip to boost performance for our engine?

is there any? etc....

mitsu_crazy · Posted: Thu Mar 30, 2006 11:33 am Post subject: