TurboGuy

The site you listed didnt come up.

twilight slide

www.mr2oc.com
letter o instead of zero

Hitchhikkr

ZC lets clear up some things here.

1) either will be fine for your purposes.
2) It wont surge. Diesel rated hp ends up more with a gas engine most of the time.
3) 4A's use shim-on-bucket, and have a tendency to kick the shims loose at lifts greater than 9mm. I had a lengthy disscussion with a formula Atlantic engine builder about this issue. 1zz shim less buckets are the win.
4) Nope.

Ring lands on the cast pistons with improper ignition timing control ala d-series. Headgaskets have too low torque from the factory to be reliable. And the fact that all of them are ancient now.

GZE pistons and proper ignition timing control are the win. 4A's are a damn solid engine, but extremely underestimated.

So he can gain 75lbs engine and 50 transmission to have .4 liters more displacement and find hairline cracks in his crank on a bone stock engine, and still blow headgaskets? I dont think so.

5 crankshafts at my brothers shop, that were in stock engines, say thats a bad idea.

TurboGuy

Thanks for the straight up answer. I was actually looking into using a custom 6mm titanium valve and increasing the Exh valves 1mm in head dia which would eliminate the shim though it requires each valve to be machined to tolerance, I think it would workout better. 5mm's would flow better, but I think with high boost and heat the 6mm will hold up better.

jinxy

LIES!!! All lies!!!!

TTC

I'm not that familiar with the 3sgtes, but out of all the high power 4ages I have yet to see one survive summer after summer at 300+whp. It's not so much that the motors suck, they are stout and make tons of power on stock blocks. I Just figure it would be cheaper in the end and more reliable to double the hp on a 3sgte than quadruple it on a 4agze. For those kind of power lvls a 4age needs everything replaced except the crank. I love my 4age, it made excellent power for the 500bux i spent but i want 300whp daily and reliable. I want to be able to beat at it and not worry bout knocking and oil pressure problems and having to arrange for tow trucks after lapping days. So this year im replacing my beloved gte with an sr20. Sadly, the sr20det is a gamble, but lets hope i don't end up with a ------ jdm garbage lemon. All I know is that injectors tune should get me almost to 300whp with the s14 motor. It will have more torque, better offboost response and the variable valve timing will help me make torque lower in the power band.

A 4agze i belive is a better base motor than a Dseries, just not as much cheap aftermarket. In an mr2 do you really want 400whp? You'll get nothing but hilarity and wheelspin. Will the tranny even put up with that ----?

Recipe for 400whp gte if i was to do it:
Holset hx35 should get you close
injectors unsure what size you would need up that power lvl, never looked into it
nice mani with external dump and "twin scroll" it so the damned thing spools
forged rods, pistons
os the bores
oem bearings
arp the ---- out of it
trd head gasket
Small port head will sacrifice top end but give you some decent off boost power and help spoo that big pig *** mf holset
water to air might not cut it for charge temps
gze 230mm clutch/pressure plate

edit: forgot about cams:

hks 272s with at least 8.3mm, oversized valves (sodium filled), new bronze guides , if u wanna go apeshit Teds makes some srs bzns cams that are ridiculous on boost, but they tend to spit shims sometimes and you also have to machine/dremel a bit of your head to make clearance for the giant lobes.

TurboGuy

3S is ZC, But I'm still sticking with the 4AGE. O-ringing the deck, working on making a main girdle that ties the oil pan rail and mains together, possibly going to a common plenum intake and scraping the ITB's, external oil pump, Quartermaster 2 disc 5.5" clutch, and further mods. Way I see it, ya do it right once and drive the **** out of it, and sometimes ---- still happens, thats just the name of the game. afterall go=dough.

My water to air IC will have some sort of additional cooling I've not yet configured. I'm thinking about making a second evaporator for the A/C so that when it gets hot outside, I can get some extra charge cooling.

CXyD

if your scrapping the 4age 20v Itbs let me know I might be interested in them.

Forthe extra could use some kind of CO2 or No2 system like what DEI designed called their cryo-system.

TTC

Go 3TC and thank me later.

toyollAZ86

yeah 3tc. you can romp on those all day.


check this website. orion does all the testing out for you.

www.whyturbothat.com

i dont think he got his power levels as high as youre aiming but he definately knows toyota engines inside and out.
theres two corolla projects on the site. one is boosted one is all motor. you should check both.