1800 sirius mods

nilgoat · Pumpum Conqueror Joined: 08 Dec 2006 Posts: 2

any advice? i'm looking to mod a 1800 sirius engine... is it really worthwhile in terms of output for the cost or am i better off swapping a sr20det or 4g63t?

Sanctifier · Posted: Sat Dec 09, 2006 9:20 am Post subject:

It depends on how much more power you want. Stock G62B 1800 = 158 bhp (flywheel.)
200 bhp. Easy to get...
Reasonably safe with OEM bottom end but use ARP head-studs + ARP con-rod bolts.
With a manual boost controller (MBC) in my first rwd 1800 GSR the performance was GREAT!
The only downside was increased fuel cut at the top end due to boost spikes and
primitive MBC. A Greddy Profec B Spec II may be a much better alternative.

IMHO replace the stepper motor and other sensors (Throttle position sensor etc.)
if you're staying SOHC. Less maintenance/tuning headaches in the long run.
FUEL:
US 2.6 Starion uses same wet-manifold twin-injector Throttle body as the JDM 1800 GSR.
New fuel injectors + other spares are available from Top End Performance USA. Click Here
Add a Bosch external fuel pump (swap) and Fuel Pressure Regulator.
I used one from a Mercedes Benz... You REALLY need a FPR after that! Rolling Eyes

TURBO:
Add a turbo from 4wd GSR (CM5A) with modified G62B exhaust manifold or adapter plate.
AIR:
I don't know for sure but check with Top End Performance to see if the MAF from the 2.6 US Starion flows more air than the JDM 1800 GSR. If so use it.
IGNITION:
Ask them if the 2.6 Starion ECU can be used as well.

Check Mitsubishi Lancer Register for more rwd LT tuning details... Click Here
DOHC:
Another (cheaper) alternative to a 4G63 is a DOHC head on your G62B 1800 block.
This is the easiest (not cheapest) way to another 40 bhp (flywheel) using stock bolt-on parts.
US Eclipse is maybe the easiest option to get.
Whatever your choice (Eclipse / 4G93 / 4G63 Gen 1 or Gen 2 head)...
use matching, stock DOHC turbo, ECU, fuel rail, injectors, cams, manifolds etc.

Over 250 bhp. ... $$$$
FIRST upgrade the con-rods and use ARP head-studs + ARP con-rod bolts.
You need bigger turbo + injectors + fuel pump + intercooler etc. OR a complete 4G63.

Brakes & Suspension:
BTW you already have serious brake fade with a stock setup + MBC. Trust me I know.
UPGRADE the calipers (+ rotors and master cylinder???) FIRST before you touch anything
else. You need more rubber too... Get 17" rims + bigger tyres if you use Brembos.
It understeers like a b!tch at the limit (all the time.) Rolling Eyes

Try stiffer front gas-struts
and springs (US Starion???) + rear gas shocks + rear LSD (very rare.)

... and try not to use an SR20... Very Happy

My $0.02�
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Guest · Posted: Sat Jul 12, 2008 12:59 pm Post subject:

Sanctifier.

would you be kind enough to explain how the gentleman did this... clueless on what and how he did this...

I have this at the moment...

on this car

i'd like to modify the fuel delivery on this car... the tbi is a pain... I'd like to go the multi point injector way

might swap a 4G63t... if it's this light, I'm seriously considering a swap

Sanctifier · Posted: Sun Jul 13, 2008 9:35 am Post subject:

sidewayz69 · Pumpum Conqueror Joined: 19 Nov 2008 Posts: 19

it looking beasty

ah find it looking like ah sirus turbo wit ah intake manifold modifacation so dat the 4 injectors can be used
not sure

some clarity please

Red Dawg · Posted: Thu Nov 20, 2008 3:25 pm Post subject:

sidewayz69 · Pumpum Conqueror Joined: 19 Nov 2008 Posts: 19

Red Dawg · Posted: Fri Nov 21, 2008 4:48 am Post subject:

Have you noticed the home made Cam Sensor
sticking out of the front of the can cover?
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sidewayz69 · Pumpum Conqueror Joined: 19 Nov 2008 Posts: 19

now noticing dat also
whey