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Comments On Dyno Graphs

R33GTRKid

By R33GTRKid,
in Engines & Forced Induction

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R33GTRKid Experienced

R33GTRKid

Posted
Posted

I have put up a while back in the RB26 turbo thread however rather than tie that thread up with chit chat, I am posting up the graphs here and am seeking some feedback.

The mods of note are:

GTSS kit

HKS extension kit (dumps)

Tomei manifold

PFC d'jetro

M's intakes

HKS racing chamber kit

Tomei poncams type B plus adjustable gears

Sard 700's

HKS fuel pump, Nismo AFR

EVC6

mines stainless front, race cat (VERY high flowing lol), Kakimoto full mega N1 cat back

Couple of things:

1. I am not sure what revs each of the speeds along the bottom represent, but it was in fourth gear and obviously where it drops off just over 215ish is obviously 8,000 rpm.

2. so it looks like it is hitting mac boost of 17 psi at about 3,500 odd rpm (never does this on the road).

3. Even tho the EVC is set on high at 18.1 psi, it never gets there, max I have seen is 17.2 psi, why would this be?

Any other comments are welcomed!

Dyno1.pdf

dyno2.pdf

thanks peoples

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rev210 Grand Master

rev210

Posted
Posted

The tune is clearly a conservative and safe one.

very nice looking curves.

It's holding boost well.

Answers;

1) as mentioned. The tune takes into account that smashing the motor right to 8,000rpm is not something to encourage on a stock bottom end.

2) Boost is 17psi as you said. What it gets to on the road is always going to vary as the load on the motor will determine boost response, so different gears / up or down a hill and throttle use will effect things.

3) The EVC may be set to 18 psi but, thats a relative number to the boost you actually get and where you get that reading from. If the boost measurement is before or after the intercooler there might be a 0.5 to 1 psi actual difference of pressure in addition to the guages error margins.

I'm sure the car is very fast. Thats what matters.

R33GTRKid Experienced

R33GTRKid

Posted
  • Author
Posted

I should have said that the top boost line (the one that looks like it is holding 17psi is my hand writing which I used to explain and ask why my boost did not stay there. The true boost starts at 17 ish and then dips to 15 and holds steady, this is the problem I am asking about REV210

PSI Parts Veteran

PSI Parts

Posted
Posted

Each actuator has a different spring rate (boost level). They can be from 5psi through to 30psi, which is the pressure that they open at. The aim is to get an actuator closest to the desired boost setting so the EBC has to do as little as possible to gain ultimate response. Some aftermarket actuators you only have to replace the springs, where others are sealed and you have to replace the entire actuator. Let me know if you need to purchase one.

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