Thread: Think I went with too big of a turbo...

I am not sure it is a big deal if you rev out the low lobes. I mean, I did it for a while without issues before I got VET cams. Not that I condone it, but I don't think you will have any issues. the low lobes are like stock DE cams.

I think you could reach the 300whp goal you have set but to get there the path will require some changes. 300whp on low lobes doesn't take much advantage of the VVL head, even though you could make it.

I'm actually starting to consider a higher WHP number too. Since I'm having to deal with the rattles, stiffness, and other discomfort, might as well get my money's worth. The car just feels a little too slow still, granted on a 2500lb 200sx it would be a different story.

Since I'm having no luck with finding VET cams, think I might start buying parts for a tubular manifold...

The ve-t I rode in had stock ve cams and it was holy shit fast.. But he had a 6262 and a. Love fab tubular manifold Was also in a nx.

Yeah that's a nice sized turbo.

In my build thread Coheed mentioned about going with a bigger A/R housing. I'm going to see if I can get a .83 a/r turbine housing and then port out the manifold more.

Been away for a while, and just read through this. Just to reference your turbo Vadim, I have the same exact turbo on my DE. Sounds like your spooling around the same range too. I also thought of switching to smaller turbo for better street manners. It does take a bit to get it to spin up, but when it's finally let off the chain, I forget about a smaller turbo. The higher CR and high timing helps with the low end, at least while transitioning to boost, so the lag doesn't seem so bad.

Not to beat the poor, dead horse anymore, but timing played a big part. I use a short tubular manifold, but it could use some work to improve flow.

The slower spooling does help with the traction, but just doesn't have enough in the mid range. Though thanks to it being a VE it feels fairly quick still though.

I can up the PSI and that should mean the wastegate stays closed more, or go with a Synapse wastegate.

I have a Turbosmart Ultragate 38 with 21 lbs of spring. I see a 3 psi drop, so 18 psi actual is what I've been getting. Can't complain, as it's worked pretty good thus far.

It took me a while to get the timing right as it transitioned to boost. My mid power really isn't too bad, but it does leave something to be desired. There's just a narrow flat spot I still need to take care of just before boost is introduced. But once boost starts coming on, it builds hard and fast. Especially when it reaches 8+ psi. I can vouch for whoever said these turbos are just starting to get going at 10 psi.

I'm still working on the flat spot in the mid-range. I'm not sure how similar/different the timing is between the VE and DE, but I can share what I have so far if it's of any use.

Post up your timing map, I'm curious to see it. I did notice a slow boost build up to 6 psi, afterwards it just drops to 11 psi in no time. Might have to just try out 15-17 psi.

Sure thing. I'm about to go to a cookout, but I'll post it when I get back home.

No hurry or worries man , what manifold are you using?