Thread: SR20VE+T low on power, please help!

Nah man they're wayyyyyyyy heavier. Like 1500kg. Which is lots of pounds, I don't know how many.
So I'm probably more like 230hp which is on the right track at least. Still a ways to go!

Good to see some progress. Sounds like you just need to spend a bit of time on the tune. The earlier switching points helped then?

Thanks man
Yeah as far as I can tell they did. Power is more linear in the higher gears and the car actually feels like it's pulling harder in 4th than 2nd...although 2nd usually ends in wheelspin lol.
In 1st and 2nd it's spin city literally as soon as the car gets to 4500rpm

Okay so me and the STi mate had some more runs last night, was good fun, we're dead level from 40-200km/h now though, he got a touch up tune and is making a bit more power now.
I'd say my car should be good for 110mph though which I'm happy with considering this:
Literally the INSTANT the car hits high cam at 4500rpm, boost drops on the gauge from 12-10psi. 2psi drop in a split second.
Ideas? VVL creating a boost leak or something? Boost stays solid at 10 until redline. It's weird.

Also, my MAF was reading 4.9V at 7000rpm in 3rd. Z32 time?

yep. although i do have a question. can not having the load scale right (high enough value) make the maf read higher than it should? haven't you go a VE maf on now?

Im not sure what hp the ve maf is good for but I've read that rb25s sometimes use n60 mafs which are suppose to be good for 300 but mine seems to wanna tap out around 270-280 on virtual dyno

An ya its z32 maf time lol an for love of god fix the load scales when you do it an get bigger injectors!

The boost drop doesn't surprise me one bit. It is caused from the motor ingesting more air, therefore less resistance, less pressure, less boost. It also means you need to lower you VVL switching points even more if you are getting such a violent hit. Try 4200, or even try keeping the intake at 4500 and the ex around 4000

+1





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I don't believe so. The maf has it's own limits that can't be altered by the ecu software afaik.
And no it's an rb25 pink label maf.



Yeah rb25/n60 are same same for all intents and purposes I believe.
And I'd say mine is giving up pretty close to where yours is, I'll just be making a little less power.

Where are your vvl switch points set at dude?





Awesome, that's how I explained to the sti mate and that's all I was hoping it was thanks guys.

Not sure about setting it even lower though? As when the cams were set to 5000 and 5300 like in the dyno graph, it took 10kmh for the boost to fall by just 1psi.

I'm keen as to get it onto the dyno and play around with cam points.

i havent played with switch points much.. its been 4900 since it was na lol.. i did try 4500 at first but there was some stumbling but that may of been tune related or who knows..