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Sliding Performance Hiflow Picks And Installationon Rb20det

CEF11E

By CEF11E,
in Engines & Forced Induction

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BAMR33 Mentor

BAMR33

Posted
Posted
i have a vg30 turbo on mine hopefully be pushing around 220rwkw soonish, just wondering what a highflow would do for the same boost say 17-18psi... im gettin over this lagg shit, althought it see's 15psi by bout 3200-3500 still laggy to me.i would love a 25/30 turbo however i dont think the bank will like it..

Hi-flow will only make lag worse, not that i'd call 15psi by 3200-3500 lagy

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Cubes Grand Master

Cubes

Posted
Posted
i have a vg30 turbo on mine hopefully be pushing around 220rwkw soonish, just wondering what a highflow would do for the same boost say 17-18psi... im gettin over this lagg shit, althought it see's 15psi by bout 3200-3500 still laggy to me.i would love a 25/30 turbo however i dont think the bank will like it..

I've had a VG30DET on my RB20det.. They have stuff all mid range and don't really get going until the higher gears. General driving rolling on out of corners in second I saw 1bar by 4000rpm ish. Loaded up in fourth I saw 1bar by a shade over 3000rpm.

The VG30DET turbo is nothing more than a RB20DET turbo with slightly larger covers to shift the power up the rev range a little (which is what a 3ltr needs) so it may struggle to crack 190-200rwkw.

They generally push 10-15rwkw max over an RB20DET turbo but with a lot less mid range. The RB25det turbo kicks its arse, it has a larger compressor and a smaller hotside that gets things moving a lot earlier. The rb25's hot side is sized good enough to make 200rwkw.

Obviously depending on dyno.

CEF11E Veteran

CEF11E

Posted
  • Author
Posted

I went to get a copy of the last run i did but couldn't find it. so we put it back on the dyno did another run.

It looks a lean up top but it is just as he came off throttle. sorry about the stupid scaling for the RPM. i didn't ask for any particular scale. the ramp rate looks ridiculous but if it started from 3000 rmp it would look more normal :)

dyth.jpg

Dale FZ1 Veteran

Dale FZ1

Posted
Posted

The numbers are very tidy. You should be happy - it looks to hold the power very easily across 5500 - 7000. The AFR overlay really demonstrates what you've done at peak torque rpm. I take it that was for knock-prevention?

Two things I'd like to see:

the torque curve (instead of power)

a dyno pull starting down at around 16-1800rpm

Just gives me a better interpretation of what it does (and yeah I know you're not likely to run an RB20 down there very much).

CEF11E Veteran

CEF11E

Posted
  • Author
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The numbers are very tidy. You should be happy - it looks to hold the power very easily across 5500 - 7000. The AFR overlay really demonstrates what you've done at peak torque rpm. I take it that was for knock-prevention?

Two things I'd like to see:

the torque curve (instead of power)

a dyno pull starting down at around 16-1800rpm

Just gives me a better interpretation of what it does (and yeah I know you're not likely to run an RB20 down there very much).

yep the dip is an effort to keep it slightly rich when it reaches peak torque. it it probably a little over enthusiastic. but better that than knock at 18psi :)

I have an old printout of torque when the car was making 204rwkw with the same turbo but just quick tune,

Jeff from TSL can probably organise a printout of torque and rpm starting lower.

I think Simon's car is making very similar power? i think i read 225 somewhere? There will be almont no difference in between our cars. the difference between 220rwkw and 240rwkw on an RB20 with the same turbo will be more wheelspin :laugh:

Roy Grand Master

Roy

Posted
Posted

They are amazing results for a std RB20 with a bolt on hi-flow turbo. They appear to be well above the results ppl can expect from a GCG Hi-Flow, HKS 2535, hell even my TD06. That power and response from only 18psi. Hell i think i t even has a HKS GT-RS beaten!

Is it possible to get a chart with road speed rather then rpm and boost?

RedDrifter Experienced

RedDrifter

Posted
Posted
They are amazing results for a std RB20 with a bolt on hi-flow turbo. They appear to be well above the results ppl can expect from a GCG Hi-Flow, HKS 2535, hell even my TD06. That power and response from only 18psi. Hell i think i t even has a HKS GT-RS beaten!

Is it possible to get a chart with road speed rather then rpm and boost?

Bugger me I thought I was the only one thinking that. :)

Simon-S14 Grand Master

Simon-S14

Posted
Posted

im pretty happy with mine atm... onlything holding me up from more power is injectors and AFM wich are on the cards soon enough.

I get no wheel spin whatso ever... pretty happy with that. just hauls. But thats largely due to my suspension set up.. even if it is used for drift.

And drift it does... bloody well. Had some 18X10 work wheels on the back with some 235's stretched on.. shredded them hard in 3rd and 4th gear... was pretty crazy :)

CEF11E Veteran

CEF11E

Posted
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I have 215 maxxis tyres and while they are good with your boot in it once it hits 5000rpm in 2nd you loose all acceleration due to wheel spin

I am going to wind it back down to 1bar for normal use it is much more practical there.

cant really help out with the other graphs unless i pay the dyno man more money and he has plenty of mine already :)

I think what i am pushing is pretty much the max the turbo will flow on an RB20.

I did a bit of testing while it was there.

1. the stock rubber intake pipe was not closing at this power level, however the dyno operator said they usually do past 220rwkw.

2. removing the panel filter and just running 1/2 an air box with no filter made no difference at all. the stock air box is fine for this power level.

3. the stock BOV holds 18psi with no problems.

4. my clutch is now slipping and a 5puck cerametallic is going in next week with a new gearbox.

5. skylines are almost as expensive as a well formed crack habit.

6. sliding performance turbos will probably help you pick up girls

RedDrifter Experienced

RedDrifter

Posted
Posted
I have 215 maxxis tyres and while they are good with your boot in it once it hits 5000rpm in 2nd you loose all acceleration due to wheel spin

I am going to wind it back down to 1bar for normal use it is much more practical there.

cant really help out with the other graphs unless i pay the dyno man more money and he has plenty of mine already :)

I think what i am pushing is pretty much the max the turbo will flow on an RB20.

I did a bit of testing while it was there.

1. the stock rubber intake pipe was not closing at this power level, however the dyno operator said they usually do past 220rwkw.

2. removing the panel filter and just running 1/2 an air box with no filter made no difference at all. the stock air box is fine for this power level.

3. the stock BOV holds 18psi with no problems.

4. my clutch is now slipping and a 5puck cerametallic is going in next week with a new gearbox.

5. skylines are almost as expensive as a well formed crack habit.

6. sliding performance turbos will probably help you pick up girls

#5 I'll second that notion.

Interloper Veteran

Interloper

Posted
Posted
I have 215 maxxis tyres and while they are good with your boot in it once it hits 5000rpm in 2nd you loose all acceleration due to wheel spin

I am going to wind it back down to 1bar for normal use it is much more practical there.

cant really help out with the other graphs unless i pay the dyno man more money and he has plenty of mine already :laugh:

I think what i am pushing is pretty much the max the turbo will flow on an RB20.

I did a bit of testing while it was there.

1. the stock rubber intake pipe was not closing at this power level, however the dyno operator said they usually do past 220rwkw.

2. removing the panel filter and just running 1/2 an air box with no filter made no difference at all. the stock air box is fine for this power level.

3. the stock BOV holds 18psi with no problems.

4. my clutch is now slipping and a 5puck cerametallic is going in next week with a new gearbox.

5. skylines are almost as expensive as a well formed crack habit.

6. sliding performance turbos will probably help you pick up girls

#3 i can tell you the stock bov can hold 20psi no problem :laugh:

why bother with aftermarket?!?

CEF11E Veteran

CEF11E

Posted
  • Author
Posted

I have been having a really good look at a few things and have come to the conclusion that my RB20 is may well be an RB22.

I took the timing belt cover off tonight to find that it has a new looking aftermarket timing belt. that didn't add up as the previous owner said it was due to be changed.

then on further inspection i dug through old receipts to find when the timing belt was done and found a receipt for 6 81mm 4agze pistons...

go figure.

I guess i am really happy about it I really can't confirm it is the case without taking the head off.

seeing as Simon is making 225rwkw the results are almost identical.

Now i am puzzled....

Roy Grand Master

Roy

Posted
Posted

I doubt it has 81mm pistins. My bigger TD06 is making:

- 100rwkws @ 3850rpm

- 207rwkws @ 4620rpm

- 237rwkws @ 5380rpm

- 239rwkws @ 6920rpm

gallery_462_50_8431.jpg

Those figures are not on a dyno dynamics dyno so are 10rwkws or so below what most DDs read.

What are the wheel sizes of the high flow? I would think they are no bigger then the TD06??? So wouldnt expect it to have more inertia???

So i would expect if yours had the extra 3mm bore and ccs it would spool up a little better.

But you never know, the difference could be in the turbo and you have the 81mm pistons...but my money is its a stocker.

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