how much boost can you run on a stock twincam 4g?

enthuzed · Post by **enthuzed** » Tue Jan 19, 2010 8:46 pm

MR Bender wrote:well i think why fix something that isnt broken yet!
See how much power i can get out of it till it pops!

If it ain't broke, don't fix it, that's agreed Greg. But better than that, you don't need to fix it if you don't go breaking it! Be nice to your car...

MR Bender · Post by **MR Bender** » Tue Jan 19, 2010 9:12 pm

enthuzed wrote:
MR Bender wrote:well i think why fix something that isnt broken yet!
See how much power i can get out of it till it pops!
If it ain't broke, don't fix it, that's agreed Greg. But better than that, you don't need to fix it if you don't go breaking it! Be nice to your car...

with a good tune it wont brake :D

Mick · Post by **Mick** » Fri Jan 29, 2010 2:57 pm

motec plus twin cam with race gasket and studs = however much boost you want. limiting factor is whether you drive like spastic and tuner was born with arms

redzone · Post by **redzone** » Fri Jan 29, 2010 6:09 pm

20psi all day everyday for over a year with cheap VR4 type casties in a sohc....

i've heard of VR4 motors running 350rwhp without having the head off.. good bolt ons and tune of course

mrb1 · Post by **mrb1** » Fri Jan 29, 2010 9:54 pm

On my EVO6 TME I run 1.5 bar all the time no problem with stock bottom end. I have also run 1.8 bar (for 3 laps until I noticed it) at Oran Park when my boost controller lost the plot, however this is pushing your luck :D
I know the VR4 pistons are not as strong as the later cars. Depends what you are doing I guess.

87_starion · Post by **87_starion** » Sun Jan 31, 2010 6:17 am

S0LJAH wrote:guys in nz run them all day everyday on 20 psi

Yup ran all my 4G63 VR-4's on more than 20Psi for years and I drive my cars HARD.

iXNAY · Post by **iXNAY** » Sun Jan 31, 2010 7:05 am

but you have to remember that 20psi from a td05 is going to be different to 20psi from a gt35R! so you cant really compare them...

87_starion · Post by **87_starion** » Sun Jan 31, 2010 9:33 am

Mine didnt have no TD05 on it

thrash · Post by **thrash** » Sun Jan 31, 2010 10:49 am

would ambient temperature also make a difference to the max PSI you can run without seeing knock?

Mick · Post by **Mick** » Sun Jan 31, 2010 11:04 am

shit yes thrash.

thrash · Post by **thrash** » Sun Jan 31, 2010 11:08 am

so then someone in nz might easily be able to run 22psi through their motor without any problems, while someone in queensland with the same exact turbo may start to see problems above 18psi.. right?

same thing during winter/summer.. we should be able to run more boost in winter than in summer..

MR Bender · Post by **MR Bender** » Mon Jan 17, 2011 9:52 pm

ok im back on this again.

im running 18psi at 6900rpm the moment.

i want more.

can i go to 8000rpm and screw 4 more psi in it?

redzone · Post by **redzone** » Mon Jan 17, 2011 11:33 pm

revs will kill it before boost

MR Bender · Post by **MR Bender** » Tue Jan 18, 2011 2:39 pm

ok
i think im just going to leave it as i cant be stuffed putting pistons and rods in it yet but i dont want to kill it!

enthuzed · Post by **enthuzed** » Tue Jan 18, 2011 8:16 pm

Sounds like you're using it again Glen. That's a good sign!

Austarion

how much boost can you run on a stock twincam 4g?

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