.68 housing to small for 600-700 whp??

[mk3-4-me]

No why would I try and push a stock bottom end to 600 whp? Lol

only thing stock on my car right now is my valve train. But I'll be getting springs n cams eventually.

It's a built 7m, will be meth injection, and on Stinger EMS.

 

[mk3-4-me]

And Harley. 11 - 12 psi isn't going to get you close to 400 hp. On my 6152 I made 391 rwhp and 377 torque at 15 psi.

Different setups, but 12 psi will not cut it.

 

[IJ.]

A genuine repeatable 600 at the wheels isn't nearly as easy as people are making out... :nono:

 

[IBoughtASupra]

This thread took an encouraging turn. I was expecting to struggle to get to 600 on the 6266 with a .68 and E85, but I really don't want to push the stock bottom end past that anyway. After it's built next winter and has higher compression I will swap for something bigger.

On your 2JZ, your good up until 800. Stock block is fine with 600.

 

[mk3-4-me]

I know. But Quake, as I'm sure you guys know of his crazy 7m, sold me his stinger. And he's going to help me get there.

I'm not worried about getting there, I'm just worried about the housing. I don't want to have to pull it back off after I find I can't hit my mark. Lol

what's the spool compared between the .68 and .81?

 

[harley1985]

lol well ok, i gotcha on that, i can always raise the psi, wat i was really asking is does that even sound practical? or should i opt to get a smaller turbo? and yes i also would like to know the spool comparison between a .68 and a .81 or even a .83 also wat set up were you running so maybe i can compare and see where i should be.

 

[mk3-4-me]

http://www.supramania.com/forums/sh...time-at-dyno!-Im-stoked!-D-391-rwhp-at-15-lbs.

There's a link to my dyno thread. Take a look and compare.

 

[NashMan]

I know. But Quake, as I'm sure you guys know of his crazy 7m, sold me his stinger. And he's going to help me get there.

I'm not worried about getting there, I'm just worried about the housing. I don't want to have to pull it back off after I find I can't hit my mark. Lol

what's the spool compared between the .68 and .81?

well I was going to post this befor but the motor changed abit it built 7m on basicly 5 pistons


mods one fucked piston and 3 other damaged piston's

motor mods

crank scaper
je piston thermo coated
eagle rods
deleted oil squrters
and 81 hot side

20 psi

my old map was 24 psi at 585


ant this was not a good tune eather even resalted in damaging my motor

 

[mk3-4-me]

Why did you delete the oil squirters?

And when did you see full boost at with the .81?

 

[K_SHAN]

I have a t4 76mm with a .68 lol I'd hope it would make 700! (I ran it on my 7m at 30lbs, but never dyno'd) even though it would probably peak and drop out. I just ditched it for a 71 .81

 

[Nick M]

A genuine repeatable 600 at the wheels isn't nearly as easy as people are making out... :nono:

Sure it is.

So swap to an LS3 if you want a big turbo with fast response.

:biglaugh:

 

[NashMan]

Why did you delete the oil squirters?

And when did you see full boost at with the .81?

because forged piston's oil jetting is some what not needed if you have a proper tune, now how long will the motor's ring's last is the big question that I can not answer

since all the pistons heat is transfer though the rings

technically since the dawn of time you pistons have bean cooled form fule/air and the over all temp of your motor

but in the late 80's the some companies started to add in oil jetting on turbo cars to help displace heat because cast pistons can not handle heat all to well nore dis pate the heat to the ring to the cylinder ways properly and over all relibilty 500.000 mile ect

further more oil jetting gives off alot of drag on the under side the piston witch reduse's horse power and rev speed



now is this for you you have decide? there pro's and cons of keeping them and deleting them read up on ask question and you find out if ya wana do it just do not do it with a cast piston or Hypereutectic pistons

for this time around I am going to be slotting my lower connecting rod's to provide more oil to my walls to prolong my ring life

 

[ATL88Supra]

the amount of power loss and drag created by oil is negligible
the pistons may be forged but who gives a fuck put the jets back on and have peace of mind
by removing them you are only asking for problems
if you want to make it go faster put on some cams (with valve and springs and shit) put on the correct turbo and stop trying to shortcut


also i am sorry but IJ is correct and even more so for the 7mgte listen to him, he has been there and he knows alot more about the 7mgte then you do

 

[mk3-4-me]

^ agree about the oil jets.

And I don't think anyone was disagreeing with IJ. Lol

But it seems like it can be done with a .68 housing.

 

[91Supra313]

if you want to make it go faster put on some cams (with valve and springs and shit) put on the correct turbo and stop trying to shortcut


also i am sorry but IJ is correct and even more so for the 7mgte listen to him, he has been there and he knows alot more about the 7mgte then you do

It seems to me that alot of the people that have not had to rebuild their motors a few times from trying some of these short cut ideas and plans, are trying to get some ideas for short cuts. If you want your motor to last, listen to some of the people that are telling you correct things. If you enjoy wasting money then buy 2 or 3 different turbos until you find the one that will work with stock stuff. If you want to do it right then build it. Don't rush because you want 600 and think that this one turbo will do it. There is a ton more into it then just a turbo that says it can push 700Hp.

Just to clear this one up I am fully agreeing with you ATL, and IJ.....

 

[ATL88Supra]

^ agree about the oil jets.

And I don't think anyone was disagreeing with IJ. Lol

But it seems like it can be done with a .68 housing.

oh sure it can be done, but it wont last long
lol also i was agreeing with the fact that IJ said it was not easy to get reliable 600hp and i was pointing out that its even harder with a 7mgte

but ya

 

[NashMan]

the amount of power loss and drag created by oil is negligible
the pistons may be forged but who gives a fuck put the jets back on and have peace of mind
by removing them you are only asking for problems
if you want to make it go faster put on some cams (with valve and springs and shit) put on the correct turbo and stop trying to shortcut


also i am sorry but IJ is correct and even more so for the 7mgte listen to him, he has been there and he knows alot more about the 7mgte then you do[/QUOTE

Do your reserch then you will know

now is 600 easy well kinda if you have a good tuner and all the stuff to make it work
700 well that 2012's new hard limt back in the day like 2004 500 was hard

over all you can hit any number it's just going to cost you and in most case's it's all ways the tune

ps you be suppried on how much drag is on piston and is very comon in the honda world 3sgte world ect do the research so you under stand how it works before saying stuff

 

[mk3-4-me]

oh sure it can be done, but it wont last long
lol also i was agreeing with the fact that IJ said it was not easy to get reliable 600hp and i was pointing out that its even harder with a 7mgte

but ya

Why wouldn't it last long?

 

[IJ.]

 

[NashMan]

Why wouldn't it last long?

like any performance motor you throw long lived reliablilty out the door

but noway days efi system out there are getting better and better so stuff can be push and monitor alot better, but this is only as good as the ecu mapping and it all and resevieing information alot more clear infromation


and over all head desigh and piston