Getting the most out of a 1G

[Quint]

Thinking bout throwing a whole heap of $$ at my GA-70.
Put a manual in it so thats the first step taken car of. Now i got a few small issues, such as its dreaded turbo lag and the fact it has _no_ power below 2.5-3000 rpm. Was thinking about putting bigger injectors on it, as i think that its just starved of fuel so thats why it has no go go. but as for the turbo lag, anyone got any good suggestions, was thinking about buying a Ct26 and strapping that to it, tho that'll probably cause a metric $&#$% more turbs lag :/ so i got the brilliant idea of putting it in a sequential setup with one of the ct12s but i'm not sure on how a setup like that'd work, would i just have to put two individual wastegates on the larger and smaller turbo allowing them to regulate thier spooling? and then mount the larger turbo higher up? Or is their some tricky combination of computers that you need to be able to do this? Would a larger exhuast system help, or just make things worse? currently running a 2 1/2" system should i fork out for a 3 or would that just be silly?

[deaf_rattle]

get a lighter car?
or strip out your current one.

1ggtes are good motors, but not that well suited to the heavy mk3 supra.

if i had a ga70 id go manual, single turbo, larger fmic. more boost
2.5" exhaust and a decent intake

that would be enough to get it up and boogying

[Malcolm]

I agree, don't waste the money on the engine, get a 7M, 1JZ, 2JZ, or 1UZ for it. Sell your's to someone with an ae85/6, early celica or something, those are the kind of cars in the weight range that would suit the 1G-GTE. To be honest a 3sgte would even be better as it makes more torque, and weighs less

But, if you must stick with it, the ct26 wouldn't be too bad, many people run the Supra ct26 on 3sgte's without much additional lag. I wouldn't bother trying to stuff about making a sequential turbo set up, if you're that fussed get a GT series ball bearing turbo or similar.

Also the 2.5" exhaust should be fine if it's a good one (mandrel bends, good mufflers), unless you're aiming for more than about 200+ kw @ wheels

[Quint]

I know that i could always could stick a new engine under the hood, except, what'd a 1UZ or a JZ cost 1.5g roughly? What'd go harder, a standard 1UZ/JZ or a 1G with the equal amount of money spent on it?

Also thinking bout playing around with some fibre glass to get the wieght down, fibre bonnet, front gaurds etc. Just something a little differant maybe.

[Malcolm]

1UZ or 1JZ would be somewhere around 2K by the time you've installed it I would think (unless you pay someone to do it). Don't know how much you could sell your old motor for to offset cost..?

You're going to need a lot more than fibreglass bonnet and guards to cut the weight down, guards weigh stuff all but the bonnet is a bit heavy.

The simple fact is that although you could modify your current engine for the cost of swapping, to produce equal or more power, you're probably going to be making the power higher in the rev range, with less torque. If you put a 1JZ in there you would be making similar power to a modified (boost, exhaust, single turbo conversion) 1G, except the 1JZ would take a few dollars to get to make much more power, and do so more reliably. This was the basic reasoning behind why I put the 3sgte into my aw11. I was nearly finished a turbo conversion on the 4agze, but decided it would make far more sense to put a motor in that made more power stock than the current one would when modified.

I guess at the end of the day it comes down to personal preference, and if you were willing to strip your car out you could see some decent weight savings and will make any modifications you make even more worthwhile...

[Stephen]

Ive got a supra with a 1g in it making 282KW @wheels.Ive got a custom manifold with a hiflowed ct26 and 38mm external wastegate,decent front mount,7m throttlebody,custom manifold,modifyed fuel rail with bigger injectors with a walbro pump and malpassi fuel reg.running a link computer.you may have seen it at the toyspeed drags.I am making 10psi by 3000rpm because of the small diameter manifold.I made 208KW@wheels before I hiflowed the ct26 so a 2.5" exhaust may be alright if thats what you want,Ive got a 3" exhaust.

[Quint]

sounds interesting, how much did it cost to get the setup done? And what sized injectors are u using/ would u recommend?

[Stephen]

Im using flowed and balanced 7mgte 440cc injectors,it probably cost around $5000,as I made all the parts for it and did basicly all the work on it apart from the tuning.

[Quint]

are you using the gen3 computer? and are those injectors the yellow ones?

[Drifter4ag]

hey stephen .. have you a dyno printout ? i would be well keen to see it !

[Stephen]

Im using a link computer,the injectors have a black top.I will try to scan a dyno sheet and post it.

[Adamal]

Yes... I would LOVE to see a dyno sheet of a 282RWKW engine running a CT26...

[Malcolm]

how about 422RWHP?


supra ct26's are a slightly different kettle of fish. Apparently they have a larger exhaust housing (internally) that flows a lot better. I've heard of guys doing low 12's in lard-ass mk3's with upgrades ct26's

[Quint]

god damn, thats bloody impressive O_O

[Malcolm]

that's a 7M, mind you

[Adamal]

that's a 7M, mind you

Hahaha you dick

[Adamal]

Heres Stephen's Dynosheet, but I can't be bothered resizing it.

http://adamal.orcon.net.nz/dynosheet.jpg

Impressive, but thats a nasty dip at the top there...... Fuel needs sorting I think!

[Stephen]

The dip is boost related we got it a little better on the dyno,but it doesnt do it on the road ,so after an hour or so we left it .A electronic boost controller may fix it.We might upgrade the link to run more boost and get better controll and probably over 300kw,but its crazy enough as it is so I might leave it,as Im considering selling it.