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Location:
adelaide
Registered:
April 2003
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Re: EFI Turbo 4K
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Tue, 24 June 2003 03:27
 
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| oldcorollas wrote on Mon, 23 June 2003 15:01 |
unless you go the 7KE manifold your only other stock option is the 4KE. the 4KE isn't that bad considering the runners are only a couple of mm larger diameter than the large port 3K heads.
200hp at the wheels? probably not at a toymods dyno day..or in 4th gear... my motor made 47.3kw at the wheels at DD5 compared to 86kw 4AG's making 55kw. so you are looking for 150kw rw?
that's around 233 flywheel kw, or 312 hp
that equates to 274Nm at 8000rpm
say you wanted a more sane 6000rpm power peak, that requires 365Nm of torque.
for a motor with 100% efficiency to do that you'd need to be running about 1.1 bar boost at 8000rpm or around 1.8 bar boost at 6000rpm. given that the corolla motors will be closer to about 80% efficiency, add another 20% to that boost.
so that's 1.3bar boost at 8000rpm (19psi)
or 1.6bar boost at 6000rpm (23.5Psi)
sounds like you'll be needing to do some serious work to the head to get it to flow those kind of numbers (350CFM at 19Psi, or 300CFM at 23.5Psi)
i think you'll have to end up going to a custom manifold.
hmm that brings another question. could a K bottom end or block withstand 365Nm of torque? i guess we'll see 
Cya, Stewart
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depends who you talk to, 200hp seems a bit high to me too but i have been assured that it is a realistic goal for a serious turbo 4k from someone with a lot of hands on experience with turbo 4ks.
i would guess a more reasonable figure would be about 150hp at wheels for the amount of money i am spending. add an extra $800 on the budget and i can have forged pistons...
7k manifold will arrive early next week. now i just have to work out what to do with the intercooler piping etc. i think i will shift the radiator over about 15-20cm to the drivers side so i can cut into the metal between the grille and the motor, or even run a 90 deg bend off the throttle body across to where the battery would go but then the water outlets off the head could get a bit tight... not really sure.
stew/greg - have you seen the manifolding on angela's ke10? its really strange, the turbo is on the wrong side of the motor... does the exhaust come under the sump or under the pulleys or what? it seems way to far way from the head, it must be pretty laggy.
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