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is it real to say ; if the gear ratio is smaller ,the turbo spool up faster due to extra effort . I actually have 4.1 torsen , if i change it for 3.26 or something like that , do my car still have good launch? and when you change gear ratio on mk3, how the speedometer can work?

i use tial f46 and by the way,what is gt4072??you have compressor side of gt42

i have gt4088r ,46mm wastegate with china 2 runner and i boost creep, i can't boost under 17-18 psi and my wastegate spring is 13psi my ic piping is 2.5 inch but 3-3.25 would be better.If you know the flow of your turbo you can calculate it on garrett site

if i want to change the gear from 4.1(jza70) to 3.72(ma70) , how my speedometer can have the right speed for the new gearing

the wastegate could be ok if i have better manifold design. if wastegate connection to manifold have angle of 90 deg , the flow capacity reduce by up to 50% good (wastegate face up) bad (wastegate face down)in this case you have to put bigger wastegate

yes it's on 1jz my wastegate is tial 46mm but i have boost creep under 18psi

i don't know for mp t70 but i have similar turbine a/r, i have gt4088r with .95a/r and i love it,little laggy but built full power between 4000-5000rpm my last setup was gt3076r .63a/r and that push from idle,but top end suck(i hated it)

yes it's me i know 30r could be 500 but i didn't like the powerband your number was impressive too for jdm twins , compare to other guys 2j with single , interesting to know that

on the dyno sheet that look laggy, but on the road its different story,it's alot more fun than my gt30 setup.With the gt40, the engine rev faster and come in boost rapidly , i probably kill the gt30 setup from first gear to fift gear the car is actually build for street and wenk-end drag , i...

here is my number with my new setup i mixed 10L. of c16 with 40L. of pump gaz to push at 28psi

yeah , i probably can do mid 12's with slick and more experience , but the top end power really sucks with this turbo,all the power is before 4500rpm and below that , the engine can not breathe correctly,with this kind of power , i can sell my car for buy a mustang!!

that what i had: gt3076 .63a/r with hks 264's ------------------------------------------ i think 3076 is too much similar to the twin i sold my 3076 , and i 'm actually put a 4088 .95a/r :evil2: , that will be a beast; that will be ready in couple of day

if i port&polish 1j head, is it possible to acheive the same results as 2j i think 2j can flow about 300cfm with crazy job

the flow of 2jz stock head that Erin Carpenter flowed is not same as my friend 2jz stock head? for intake port ,at .400, my friend had 215cfm and after port&polish he had 234cfm??? bizarre

anybody's know what jza70 twinturboR have in tank? is it ma70 7mgte pump or mk4 tt pump i have it currently in my hand but i can't see any part number on it

yes they are , but i think they flow same than other cause the port don't have ''s'' chaped

your port look good (on the picture) if you found that you have slow spool;that probably cause the gt40 creep is probably cause by port to the wastegate, cause you have just one(on the picture) and with gt4088r it can't afford i currently look to buy gt4088r for 1jz , do you recomment it

I think couple of guy on this forum have 1j with gt4088r , i would like comment from they're experience . From what i read , lag is overrated , he probably hit full boost at 5000rpm?? on 1j . garrett produce very fast spolling bb turbo i want big power 1j :evil2: and lag is not trouble if he...

sorry , my bad in this case , do you think that small gt30r with 1.06 a/r will be lag monster

correct me if i'm wrong,but your t61 have t4 inlet , and .68 t4 vs 1.06 t3 must be pretty close i'm not sure if i change just from .63 to .82 that will give me big difference , probably my turbo is too small for what i expected.if i stay gt30r i'll be stay in 13's or high 12's someone can...