Rb20/25 Turbo Manifold

[t_revz]

What's going on with it Luke?

11 psi at 4700 then rising up. Waste gate fully closing? Another issue?

[LANDSCRIBBLE]

Not too sure at the moment man, before i was getting 20 psi by about 4200rpm all the way to redline.

I wanted a low boost and high boost option (12 psi and 20psi). The tuner tried fiddling with the EBC but could not get it to hold steadily, said if he increased to 18psi it just drops down to 12 by the end. So i said to leave it at the 15psi tune for now until i get another boost controller, or figure out whats going on..

I may not have enough pre-load on the actuator rod, perhaps causing it to crack open pre-maturely? And yea Tao i'll look into the actuator rod.

I think its the 3rd or 4th tuner ive dealt with thats said these HKS EVC-S's are pieces of crap so it could just be that and my dodgy kando actuator..

Back to the drawing boards!

[t_revz]

How much preload has it got? About 3-4mm?

Turbo hasn't changed or been modified since has it?

[LANDSCRIBBLE]

I think i only managed to get 2mm onto it with the thing threaded on all the way. Turbo is the same.

[Hanaldo]

Very very close result to mine in the end Luke... Couple of differences between our setups, but interesting how similar in power they are.

[t_revz]

Your boost line looked like that too Martin?

[hypergear]

This manifold does add in abit of lag to the turbo but one the end it should make some thing like a 20KWs increase based on the same boost level. It looks like the actuator opened too early and not enough travel. I recon just install the 20psi actuator that came with the turbo, it doesn't boost to 20psi unless you step on it, boost control with your foot.

[t_revz]

I recon just install the 20psi actuator that came with the turbo, step on it,

+1

[Plattsy]

Ok here are some results using the cheap side mount V stock manifold V local hand made manifold.

Pink is ported stock manifold, Been the most responsive, but lowest in power evening using more boost.

Solid Red is the cheap side mount. the laggiest and required bit of work for it to fit properly. Power isn't bad.

Thin red is local hand made side mount, slightly laggier then stock while making the most power on least amount of boost.

For a budget its worth its money. I would still go for a proper side mount.

go on then stao.... how much do you charge for porting stock manifold?

[hypergear]

Will cost $400, more then buying those ebay manifolds, my workers don't accept $10 / Day labor.

I find abit strange about people wishing to run like 12psi on low boost and 20psi on high boost. The car obviously don't comes to boost on cruise, and when I hammer it I sort of do expect the full potential of the car specially when people come up for a random drag. It would be like "wait, give me a sec to work out my EBC first." no need for full throttle all times.

[LANDSCRIBBLE]

Yea worst case ill wack the old one back on. I'd just really like to have lower boost for fanging around the track

[t_revz]

Install WMI for track days

[LANDSCRIBBLE]

WMI, tempting. If only we had E85 over here!

[Hanaldo]

Your boost line looked like that too Martin?

No, my boost line was rock solid. But I'm running a Profec II and external gate.