Help stuck at 230kw only $2700 left in budget

[Lazin]

Ok I'm putting it out there to see what you guys can come up with.

I have $2700 left to spend on her and have a few options.
I know what direction I'm thinking but would like a couple opinions.

Here is where I'm at.
4.2 come bottom end 8.2:1 comp.
Smallish cam.
Stock heads with heavy springs.
Pacemakers + System.
Ported maf and tb.
Mildly ported manifold.
Mildly ported m90 2.8" pulley over driven crank. (11psi @2000-5600rpm)
240kw @ 5000rpm
460nm @ 3300rpm

Running gear is.
Th700 St2 2400 stall
3.45 lsd. with over sized rolling diam tyres = 3.23:1

Will need retune regardless of what I do so lets call it $1500 budget, can be stretched a bit.

Problems are little M90 running very hot and cam too small.
Solution are....
#1. Bigger cam + port heads $1800 ish +9hrs
#2. Bigger cam + IC $2100 ish +7hrs
#3. Hi ratio rockers + port heads $1600 ish +6hrs
#4. Hi ratio rockers + IC $1800 ish +5hrs

So Power+reliability V work+cost?
Opinions please.

[Krisp]

save on your budget with buying good second hand

[immortality]

intercooling is your best option. either W2A or A2A. seeing as your going for a full tune anyway i'd recommend A2A as it's more efficient and then you can run a much smaller pulley then you have on now.

also use a 82 degree thermostat and have the thermo fan on/off temps reset to suit

[Lazin]

Thanks for your input Immortality.

Don't want to mod the bonnet so can only fit a 25mm IC under M90 so options are Yella's or Mace's small ICs, which they say drop temps around 30 degs c.

Also can't get much more puff out of little blower I would love to toss on a tvs 1900 but thats another $2k on top.

Already have Davis Craig Elec water pump and adjusted thermo to suit slightly lower running temps,

and all the other little bits like copper plugs, Walbro, CAI, so on.

P.S Because of the small cam and hot discharge temps I have a good whack of retard, so what I'm after is the mods I'll get the most timing out of.

[Pub247]

$1700 Gt35/40 turbo
$1000 turbo mainfolds
problem solvered

[one_and_only2004]

Intercooler for sure - you'll pick up a heap of torque.

[Zeussy]

Two of the big ones. Just tell Harry you need them by tonight...

[Adam_88]

$1700 Gt35/40 turbo
$1000 turbo mainfolds
problem solvered

plus 1000 in fittings,piping and plumbing

[Adam_88]

Two of the big ones. Just tell Harry you need them by tonight...

cheep to $500 for a wet kit

[Pub247]

plus 1000 in fittings,piping and plumbing

well he wont need all his old charger shit sell that theres your money for it

[ToMMMaY]

go turbo dude thats where the numbers/power is at

[one_and_only2004]

go turbo dude thats where the numbers/power is at

Yeah, tear all that supercharger stuff off and start again. You should be able to do that for under $2000, right?

[acarmody]

If your doing most of the work yourself, there is no reason you can't go bigger cam and intercooled.

EDIT: MACE even have thier cams on sale, you know you want too.

[Pub247]

To be serious here. If your gone down the s/c root and you seem to spent a lot money on it and want to stick to it.

What most people dont understand with charger and turbos is the efficiency maps. All your older eaton are only meant to do 13,500rpm at their max efficiency. these people with 19psi pullies are way over-spinning them and the end result is 19psi of heat.

As said there's 2 ways to go here either cool down your intake charge or buy a bigger/better supercharger like a whipple which is more efficiencent. In your case and budget cooling will probably be the best choice and throw in a set or roller rockers (proper ones) that wont push you lift to high.

A2A cooling is going to be cheaper W2A is better IF done right. With your budget go the A2A.

These mods should net you a decent gain for your budget and you need to find some mates with good mechanical knowledge and decent welding skills you'll be able to get it done with rockers or cam within your budget.

And best bit of advice your going to get is power figures dont mean shit. You have a genuine 12sec car there id say if best case scenario.

Theres people with strokers and centrifugal chargers that your car should make lunch of as it is

[Lazin]

She is pretty quick heaps of torque from 1800rpm I just know that there is another 30-50hp sitting in there restricted by heat and lift.

If i can drop temps by 30 odd degrees and grab another 25thou of lift bump the curve a little higher then hopefully they will show up.

So any one got some good second hand 1.7 or 1.8 lifters? (Rockers thanks!)

[Pub247]

She is pretty quick heaps of torque from 1800rpm I just know that there is another 30-50hp sitting in there restricted by heat and lift.

If i can drop temps by 30 odd degrees and grab another 25thou of lift bump the curve a little higher then hopefully they will show up.

So any one got some good second hand 1.7 or 1.8 rockers?

i'll fix your post for you

[immortality]

the MACE A2A should fit under a standard bonnet. better then W2A but needs tuning. then you can chuck on a smaller pulley as well

[Pub247]

better than w2A how so? or you reffering just to the ones available for l67's?

[Adam_88]

if you put a w2a with a seperate cooling system with an ice box it will be way better than any a2a. you could also put a methanol injector into the back of the throttle body to cool the blower then you can run more boost

[one_and_only2004]

if you put a w2a with a seperate cooling system with an ice box it will be way better than any a2a. you could also put a methanol injector into the back of the throttle body to cool the blower then you can run more boost

That's a good idea really - W2A intercooling is a lot more efficient than A2A when done properly. Regardless of the methanol injector that poor little blower will be running way out of it's efficiency range so I suggest leaving the boost at the current levels.

[Adam_88]

That's a good idea really - W2A intercooling is a lot more efficient than A2A when done properly. Regardless of the methanol injector that poor little blower will be running way out of it's efficiency range so I suggest leaving the boost at the current levels.

agreed, id be saving my pennys for a whipple and aluminium heads

[Lazin]

That's a good idea really - W2A intercooling is a lot more efficient than A2A when done properly. Regardless of the methanol injector that poor little blower will be running way out of it's efficiency range so I suggest leaving the boost at the current levels.

Definitely not planning on pushing baby blower an harder.
Totaly forgot about meth/water inj decent kits are about $400 i think?
Damn more options!
"W2A intercooling is a lot more efficient than A2A when done properly." So do mace do it properly?
I've spoken to them a couple times, use and rate their TBs, & MAFs but would like someone who has one of their W2A coolers opinions

[one_and_only2004]

I haven't dealt with their blower applications but I always thought they just sold the plate that goes in between the blower and the motor, and you make up your own intercooler setup. My old ute was tuned through chiptorque and they said A2A intercooled top mount blowers go a bit funny due to the throttle being before the charger (I didn't really know or care what they were talking about at the time) but they said they were on top of it - and this was close to a year ago.

W2A intercooling is a lot harder to make from scratch too - you've got your radiator, pumps, reservoirs, Intercooler and plumbing to worry about - which is also a lot of weight. You loose about .2psi through the system though, which is very efficient. I've seen some systems with a 1% pressure drop on the internet.
A2A requires an intercooler and plumbing - I managed to get a mate of mine in Brisbane to do the whole thing for me, it cost $1500 using stainless steel piping TIG welded including all the brackets and intercooler. It lost about 1psi in a 10psi system, but gained about 60NM of torque. using silicon and alloy piping you could do it for a fair bit cheaper I reckon.

[delcowizzid]

air to air is the best way for the street theres so much air round to cool your charge water to air is good if you can keep the water cold with ice but most w2a kits for l67 are a restriction in the inlet under the blower its only a small hole under there why block it with a radiator in there LOL.i myself would stop spending money on the charger and sell it heads and all and go turbo like suggested above youll gain more than your 50Hp extra straight away LOL

[westerlybreeze]

My 2cents would be turbo

But that depends if you like the superchargers early torque addition or want to chase more hp.
I saw a clip on youtube of a guy in the states blocking off the water gallery from the lower manifold into the S/C. (This lowers intake air temps a little of the S/C and T/B).
Do the Aussie M90's have this water gallery to block off?