Getting more power

[LEAKER]

Ok this is for people that know what they're talking about only please.

I'm looking to get the most from my gt4 i can without pulling the head off or loosing reliability.

Ideally i'd like a setup that has very little lag and smooth power through the rev range. I am not looking for 30psi boost.
Obviously, as with anything the cheaper the better but i'm not going to be buying poor quality parts.

At the moment the work done to the engine is:
Full rebuild 100kms ago
New pistons
Race bearings
Crank polished
Bored .5mm over
Decked
Steel headgasket fitted
Valve regrind
Adjustable cam gears
POS Stainless manifold
3" dumper into New 2.5" mandrel bent exhaust with turbo flow muffler only
500x230x76 Racepro intercooler with custom 2.5" alluminium piping
Hks SSQV
Brass 6 puk clutch

So that said i have been told the head will start peaking out at 350-400hp before it needs porting and the valves changed to shimless? type.
I'm not really interested in more than 400hp anyway so my thoughts are
Street cams (kelfords)
New custom Manifold
Turbo (What specs? brand etc)
2.5" down pipe for torque
38mm external (i have a tial one already waiting to be fitted)
Injectors (1200cc? What specs)
Would i benefit from going to 2" intercooler piping for torque?
FPR
Link LEM or plus G1?
Will i need to upgrade ignition to a wasted spark or indivdual coils or will a simple lead and coil upgrade suffice?
Fuel pump (what specs)
Do i need a fuel surge tank for street, strip or track driving?
What gauges would be reccomended, i would assume oil press and boost pressure would be the main ones?

I'm not an idiot, please don't try and treat me like one. This is so i can gauge what sort of money i will have to spend based on other peoples experiance with brands, parts etc. I don't expect to run 25psi from my ct26 and have 400hp for the next 20 years.

[Dell'Orto]

GT28RS, Wolfkatz fuel rail, Gen 3 injectors, Link.
What sorta power are you after though?

[LEAKER]

My ultimate aim would be 400hp with full boost at 2500-3000rpm.
Just put your foot down and there's power there you know? My 382rwhp 1ggte supra hit 21psi (full boost) at around 4500rpm and the power was just wasted, i mean it really $&#$% took off at 4500 but by that time the person you were racing has crossed the finish line. You reckon gen 3 injectors will do the job?

[Dell'Orto]

Unlikely to happen with a 2 litre man, 298kw is a buttload of power!

[LEAKER]

it was, and we truley smashed a 911 porsche (granted it wasnt a turbo or anything) that had a massive run up on me one day but standing start was just piss poor. What would be realistic?

[Dell'Orto]

If you're wanting instant boost like that, you're gonna be limited to a fairly small frame turbo (unless some of the newish BW ones can do the trick - Lith?)
I think even a GT3071 will be >4000rpm
Edit: Good example here http://pic20.picturetrail.com/VOL1466/1 ... 694481.jpg

Clint/TRDGT4's ST205...250awkw on a GT30, full boost is over 4k

[tsoob]

throw out the old link

get a g4 to start with

lem or g1 a waste of time

[LEAKER]

throw out the old link

get a g4 to start with

lem or g1 a waste of time

How so? I havent purchased one yet but i would have thought that it would come down more to the tuner than the ecu. I mean the old links are tried and tested through and through and for the sort of hp im looking for i would have thought a link plus g1 would have done the trick and spared me a few hundred dollars to spend elseware?

[Heylin]

KO Racing, EMS Powered or ATS Racing USA will be the place to get your bolt on turbo kit with the US$ crazy at the moment youd be mad to get something in NZ.

They also have dyno charts (for MR2 anyway) so youll know what sort of performance to expect.

For the 300-400HP range youll deinfately be wanting a wolfkatz rail or to mod your stock one to dual feed and oversize. Cost around $600-700

SARD 280LPH pump or higher $400-$500 or Aeromotive if you got the $$$, steer clear of Walbro.

Clutch masters FX300 or 400, or ATS Clutch Kit, or if aiming for 300-350hp an Autoclutch Auckland upgrade for around $600 ay work well (Full faced kevlar with 2500 lb pressure plate) good street drivability.

800cc injectors $160ish each X 4

The G4 would also be the best ecu for $$, especially for controlling the bigger injectors while maintaining a good idle. Motec is also reccomended but >$2000, (Link G4 is $1800). Dont quote me on the injector size thing, but its my understanding bigger injectors are harder to control at low rpm.


Try eBay with the US$ good you may get some bargains, also try MR2OC.com to see what high HP MR2s are being parted out.

Finally hit up ATS Racing, they may be able to do you a package deal on everything you need.

I should have done this to get my 300-400HP but ended up using a NZ company and got burned, spent a bomb and got 275rwhp. All I can say is take it somewhere reputable to get the work done.

[Akane]

GT3071R kit from ATS
wolfkatz fuel rail
800cc injectors
Link G4 or your decent ECU of choice.
I'm using oldstyle warlbro no problems. Don't know about others.
to go past 330hp-ish without putting the pressure ratio way off, you'll need cams, go HKS 264 on both intake / exhaust.
your choice of intercooler.

That'll put you on the high 300's if not 400's. But start to stress the internals. Don't forget it's all in the tune.

I'll rather TD06SH-20G, but that's because they're mean

GT28RS... yeah... nah...... hmmm, not for the power levels you're after. You have to run a pressure ratio of 2.15-ish while having the head flowing around 35lb/min to get that almost-impossible-to-attain 330hp (some will say 350hp). But they're quite responsive when you go .64 housing.

[tsoob]

throw out the old link

get a g4 to start with

lem or g1 a waste of time

How so? I havent purchased one yet but i would have thought that it would come down more to the tuner than the ecu. I mean the old links are tried and tested through and through and for the sort of hp im looking for i would have thought a link plus g1 would have done the trick and spared me a few hundred dollars to spend elseware?

cleaner more up to date tec, more tuners are competent in them, they dont lose their tunes and the firmware is better.

I have been thru 2 ecu's already. by trying to do it cheaper in the first place

[Lith]

My ultimate aim would be 400hp with full boost at 2500-3000rpm.
Just put your foot down and there's power there you know? My 382rwhp 1ggte supra hit 21psi (full boost) at around 4500rpm and the power was just wasted, i mean it really $&#$% took off at 4500 but by that time the person you were racing has crossed the finish line. You reckon gen 3 injectors will do the job?

How does your priority lean (400hp, or full boost by 2500-3000rpm), and how worried about spending money are you? Do you mean 400hp @ wheels?

I also notice you are talking about a G1 Link instead of G4, strictly speaking the old "Money - performance - reliability, pick two" addage really comes into it here. If you are worried about the money difference between a G1 and G4 Link then you probably can't justify the R&D required to meet your targets, you could easily end up spending the difference just resolving gremlins you haven't hit yet.

Seriously, there are so many reasons to go for a G4 Link - I am sure you'd regret the compromises in performance/drivability associated with getting a G1 Link more than the extra cost of buying a G4 in the long run. In regards to being down to the tuner, a tuner can only do as good as a combination gives them the ability to do.

[jaypines]

My ultimate aim would be 400hp with full boost at 2500-3000rpm.
Just put your foot down and there's power there you know? My 382rwhp 1ggte supra hit 21psi (full boost) at around 4500rpm and the power was just wasted, i mean it really $&#$% took off at 4500 but by that time the person you were racing has crossed the finish line. You reckon gen 3 injectors will do the job?

twincharge ... best of both worlds. though havent seen one yet on a 3s.

[Akane]

twincharge ... best of both worlds. though havent seen one yet on a 3s.

Because nobody is "reckless" enough to put something that much more complex and expensive for minimal gain.

[Lith]

It shouldn't be THAT complex, and its not THAT minimal a gain... if you do it right.

[Heylin]

My ultimate aim would be 400hp with full boost at 2500-3000rpm.
Just put your foot down and there's power there you know? My 382rwhp 1ggte supra hit 21psi (full boost) at around 4500rpm and the power was just wasted, i mean it really $&#$% took off at 4500 but by that time the person you were racing has crossed the finish line. You reckon gen 3 injectors will do the job?

twincharge ... best of both worlds. though havent seen one yet on a 3s.

2 a point, the supercharger will eventually become a restriction in flow thus limiting maximum power.

Now if you could bypass the supercharger at certain points and bring it back into the system via some sort of solenoid controleld valve that would be awesome (but complex to tune)

Imagine a nice SC12\14 supercharger running 14 psi for fast 1500rpm to 4000 rpm, with a nice big turbo to cover the 4000+ rpm range of power .

Someone do it.

[JustinSpiderholden]

My ultimate aim would be 400hp with full boost at 2500-3000rpm.
Just put your foot down and there's power there you know? My 382rwhp 1ggte supra hit 21psi (full boost) at around 4500rpm and the power was just wasted, i mean it really $&#$% took off at 4500 but by that time the person you were racing has crossed the finish line. You reckon gen 3 injectors will do the job?

twincharge ... best of both worlds. though havent seen one yet on a 3s.

I rember a few years ago Jono form performance metal works was building a DX with a twin charged 3sgte

[pureadrenalin]

We are almost in exactly the same spot on our car modding path, Except mine is in an SW20
I have:
Full rebuild 120kms ago
New forged pistons
Race bearings
Crank polished
Bored .5mm over
Decked
Steel head gasket
HKS 264 in/ex cams
Slight port, only to match the stock inlet manifold really
Link G2 plus with link ignitor - running dizzy setup
5 puk clutch
Modded CT26 with 38mm external wg
HKS 550cc injectors
Fuel surge tank with external Bosh 044 pump

Next in my steps are:
New fuel rail (ATS) and injectors (1000cc top feed).
Turbo (probably looking at a GT3071/76)


My advise to you;
Get some cams, forget about porting/shimless buckets. Head will do more than 350/400hp.
Get a good fuel rail, FPR and 1000cc injectors (means if you want to run E85 later you can)
Go big on the downpipe
Leave the 2.5” intake piping as is
Get a G4 and aftermarket coil (link, MSD) and leave the rest of ignition system alone
Get a good fuel pump, many options here
You will spend heaps more than you think on AN fittings

[Lith]

2 a point, the supercharger will eventually become a restriction in flow thus limiting maximum power.

No it won't, if you match and build everything right.

[Distrb]

i managed to get >this< from a GT2871R at 16psi boost strapped to the side of a virtually stock 3S (alebeit in an altezza). Is a fairly good example of what many consider a smaller framed turbo will do but still not at full boost till 3700rpm. Ultimately it is a responsive and very streetable setup and is pushing the limits of that turbo at that figure.

TBH i dont think you are going to get a turbo to bring both the response and the top power figure you are wanting