4age 20v twin charge. - Toyota Nation Forum : Toyota Car and Truck Forums

kapone5684 · 06-05-2006, 07:43 PM

ok apparently I am told that there is a 20v twin charge out there. and I was interested in knowing more about it. lokking for advice,ideas, and help.

looking to find what the difference's are from the sc12/sc14.
I will be running at 8.0:1 compression arias pistons.
A ct20b turbo with cutom made turbo manifold and intake manifold top mount intercoller and front mount. also am trying to source out a blacktop 6 speed trans for this project too. I know it is going to take at least a year to finish but it is a tak that I am willing to concour.

Thanks

Rob

punter · 06-05-2006, 09:24 PM

Just would say that a c160 (blacktop 6 speed) is weaker than the 5spd box (not by much) and will not stand up to a forced induction 4age. Try looking for an e58/e51 from a 4agze.

And on the topic of twincharging, good on you for giving it a go but every thing i've seen indicates that its not worth the effort.

cuzman · 06-05-2006, 09:49 PM

seen it done on an ae92 4agze.......the charger starts off then the turbo took over...
its a top way to go but bloody dear and a pain in the butt to get right!
It wont increase the max h.p just smooth out the power curve a bit...
if ya got the time and money good luck
use an e58 box!
if you must have the c160 be very gentle..no hard take offs or burn outs..lol

kapone5684 · 06-05-2006, 10:38 PM

thanks you guys I was wondering if I had the c160 and had it bulletproofed whould that do me better than a 5 spd? also if you know of anywhere I could get a c106 and shifter assembly and drive axels. that would be great.
thanks again guys.

cuzman · 06-05-2006, 10:45 PM

Due to the cost of stenght a ing...a box its really unviable!
the six speed is'nt really needed with a twin charge system as you will have stacks of torqe...
so i'd say save some bucks and ya wrist and go the e58
the six speed was only meant for the 20v which likes to stay up high in the rpm range for best performance...
i have heard the 5 speed is a bit stronger but its only a rumour..
if you cant find an e58 the all trake has a e57....strong as but different ratios

toyotaspeed90 · 06-06-2006, 05:24 AM

Quote:

Originally Posted by kapone5684

ok apparently I am told that there is a 20v twin charge out there. and I was interested in knowing more about it. lokking for advice,ideas, and help.

looking to find what the difference's are from the sc12/sc14.
I will be running at 8.0:1 compression arias pistons.
A ct20b turbo with cutom made turbo manifold and intake manifold top mount intercoller and front mount. also am trying to source out a blacktop 6 speed trans for this project too. I know it is going to take at least a year to finish but it is a tak that I am willing to concour.

Thanks

Rob

sc12 is the more common s/c... found on the mr2's and corollas.... the sc14 is physically the same size in height and width... but it's longer....

why pay for the arias pistons when you can go to a dealership and pick up factory forged toyota 8.0:1 (for a 16V.... and i'm assuming that is what the arias are for as well.... the c/r will probably actually be different on a 20V since the combustion chamber has a different design & shape) pistons for around $200

why in the world would you run 2 intercoolers? i thought the purpose of this project was to increase engine efficiency....... not weigh the car down with random spare parts and have changing air flow sizes of inlets and outlets of different intercoolers and pipings and manifolds OH MY!

you can get the 6 speed tranny & axles and hubs from a new corolla xrs or celica gts fairly easily... just need to swap bellhousings....

get an E series tranny if you actually plan to do this inefficient project......

i'll tell you this..... i have a car with an ae101 gze.... ie, strong bottom end, good flowing head, sc12 already bolted on, the s/c is already setup on a switch, the motor is running on a standalone ecu..... and i have a turbo sitting in the garage waiting to go into the car.... but i'm not going to waste my time and money by keeping both.... it just isn't the bright idea

and if you go running off to the other thread where they point out the mk1 mr2 that has the twincharge setup on it...... sit down and actually think about it.... the owner may have mentioned "don't listen to the naysayers..... this things accelerates off idle and doesn't stop!"... yeah, that is at boosts between 25-30psi on a well built bottom end.... that paltry 10psi the s/c is putting out is helping in 1st gear maybe up to 3,000 rpm's.... after that it's ALL turbo......

micro214_kp61 · 06-06-2006, 06:54 AM

Quote:

Originally Posted by cuzman

seen it done on an ae92 4agze.......the charger starts off then the turbo took over...

i've always thought it's the other way around. the turbo starts and the sc finishes.

kapone5684 · 06-06-2006, 12:03 PM

toyotaspeed 90 you keep refering to 4agze parts. with the 20 valve you need to have the gze pistons cut for the 3rd intake valve which is why I am going with the arias pisons. and reply to micro214_kp61. turbos take time to spool and superchagers are for the inital low end torqe. at least that is what I learned for reading all of ray halls books. would nt it be lot cheaper to buy a c160 than buying a trans that is brand new and also have to spend more money on the bell housing?
thanks again guys.

toyotaspeed90 · 06-06-2006, 12:44 PM

finding a c160 is the problem...... i'm giving you an easier alternative.... in the other thread you're talking about 'bulletproofing' a transmission so i would assume 1) you have no idea what you're trying to get into 2) you have money to pay for whatever

again.... i mentioned that if the s/c does help... it would be at under 3,000 rpm's in 1st gear only.... after that the turbo will have already be 3/4 spooled in all the other gears at the shift points and the s/c would be useless

20V heads can fit on 16V blocks..... 20V heads, i believe, will work with gze pistons w/o requiring a 5th valve relief.... just don't snap the timing belt

i've referred to this time and again..... but this is a setup with a smaller (t25) turbo on a relatively stock 4agze (early).... built by Brent Picasso... he's a local mr2 owner.... running on megasquirt & megajolt lite jr (he's actually the person who made mjl jr & did the coding for it)...

makes over 200wtq at 3300rpm's..... that would eat the boost of an sc12 alive down low...

you just need to figure out what the car is for, build it as such, and find the right turbo by studying their maps & surge lines in comparison to your engine.....

kapone5684 · 06-06-2006, 01:06 PM

well By builtproofing the trans I was talking about cryo strenghting the internals. and i have a connection on that so no all that expensive. I also have a guy in seattle that is willing to part out clips to me for a very reasonable price. so in other words all you think that would be useful on thie engine would be a turbo? well I am going to sit down and do some more research and I will let you know what I come up with. thanks again

toyotaspeed90 · 06-06-2006, 04:38 PM

um.... read the list of cars i have..... i have tons of parts lying around for all... i've gone over this with MANY other local (knowledgeable) toyota tuners..... we always come up with the same result

punter · 06-06-2006, 05:25 PM

Quote:

Originally Posted by micro214_kp61

i've always thought it's the other way around. the turbo starts and the sc finishes.

Why would that be any good?? the factory charger runs out of puff at 15psi, it kinda limits your options as far as horsepower.

StealthSeo · 06-06-2006, 06:09 PM

Twincharged 20-Valve 4AGZE for AE86 Corolla