Better Flowing Intercooler For Rb25 In R32

[R31Nismoid]

1. If there is a restriction you'll see the turbo side making "X"psi, and near the T/B you'll see a drop.

Not uncommon to see a 1-1.5psi drop - anymore than that is certainly an issue.

Also test as close to turbo & T/B as possible so that way you take into account all the piping bends etc.

Just thought of another - Inlet temps.

2. Pre/Post cooler temp. You might find that it's not cooling the air enough - which is not neccesarily a restriction/cooler problem "as such". Often the better "cooling" cores are slightly restrictive (1-1.5psi as opposed to .5-1psi for higher flowing)

Are you logging inlet temps? That could be a reason you are being held back also.

If those two show up nothing, then it'll be somewhere else possibly.

[gotRICE?]

If you buy the Blitz intercooler specified for GTR it doesnt come with any piping AFAIK.

The blitz intercoolers seem to work pretty well.

[Count Grantleyish]

  On 20/07/2011 at 7:37 AM, gotRICE? said:

If you buy the Blitz intercooler specified for GTR it doesnt come with any piping AFAIK.

The blitz intercoolers seem to work pretty well.

End tanks are the same as OEM GTR cooler, meaning Russ'll have to re-do the piping.

[gotRICE?]

Ahh i see, hence why they dont supply piping kits.

My bad, ignore me.

[DJRIFT]

do you actualy know if its the cooler core causing the problem?

you should take the cooler off. plumb in a pice of pipe and run it up on the dyno to see if anything changes. you could be chasing the wrong thing. wasting time and money trying to solve it.

[Russman]

Thanks for the input guys. I've been told by other tuners that the PWR cooler would be restrictive but I didn't really believe them till it held mine back. I'll let you know what I go with.

[Roy]

Mate, throw a few screwed bungs in your cooler pipes and measure the pressure drop. also, wouldnt nurt to have additional pair of screwed fittings that let you put hand held temp instrument with two probes to see temp drop.

I would be amazed if the cooler is the problem...even if its a cheapie with PWR sprayed on for cred, what makes you think its a restriction.

[Russman]

  On 20/07/2011 at 1:10 PM, Roy said:

Mate, throw a few screwed bungs in your cooler pipes and measure the pressure drop. also, wouldnt nurt to have additional pair of screwed fittings that let you put hand held temp instrument with two probes to see temp drop.

I would be amazed if the cooler is the problem...even if its a cheapie with PWR sprayed on for cred, what makes you think its a restriction.

Chris said that it might be a limiting factor a while ago before the car was even running. It's the only thing not proven on other cars.

[Marlin]

  On 20/07/2011 at 1:10 PM, Roy said:

Mate, throw a few screwed bungs in your cooler pipes and measure the pressure drop. also, wouldnt nurt to have additional pair of screwed fittings that let you put hand held temp instrument with two probes to see temp drop.

I would be amazed if the cooler is the problem...even if its a cheapie with PWR sprayed on for cred, what makes you think its a restriction.

It's got the cast PWR end tanks so would be a good copy.

I'm been thinking hard but am struggling to think of a bolt in solution mate.

[Russman]

  On 20/07/2011 at 11:58 PM, Marlin said:

It's got the cast PWR end tanks so would be a good copy.

I'm been thinking hard but am struggling to think of a bolt in solution mate.

Nah it's genuine. I bought it new years ago. This is my 2nd one. 1st one got smashed on the wall at winton at a drift day lol.

[Marlin]

Yeah that's what I mean mate, it's genuine PWR

[tom_g]

Russ, I've got a greddy M spec if you want to test it. I'll measure it tomorrow, but I think it should fit. Its on my car, but as usual my car never gets driven so you're welcome to pull bits off it.

It was a fairly cheap kit so probably isn't the greatest core, I have no idea how well it flows but you could test it. If it works we can sort something out, at least until superlap.

Let me know if you want to try it.

[Russman]

Thanks Tom but I'm pretty sure it'll be the same length as other greddy's. Long end tanks...

http://www.nengun.com/trust-greddy/intercooler-kit-spec-m

[scotty nm35]

The Greddy's have long tanks for a reason, they are needed to flow well. Your PWR endtanks are too short and high velocity air wont make it to the top of the core without a fight imo. Im running 310awkw on a 220mm cut down Greddy core.

[tom_g]

Tank to tank = 700mm

End to end (including flanges) = 760mm

Its close. Might fit.

[Russman]

  On 22/07/2011 at 2:18 AM, tom_g said:

Tank to tank = 700mm

End to end (including flanges) = 760mm

Its close. Might fit.

oh that does sound like it would fit... Only problem is that if I chuck in on and re-tune, I'll still have to find a long term solution.

I'll give you a call.

[RBNRG]

+1 for anyone who said hybrid. I had the same problem as you except we managed to top out the pwr cooler at 280kw. Swapped to hybrid and ran 313 in the first few runs and has since made a pb of 336kw. All that and its also lighter

[Russman]

  On 27/07/2011 at 9:40 AM, RBNRG said:

+1 for anyone who said hybrid. I had the same problem as you except we managed to top out the pwr cooler at 280kw. Swapped to hybrid and ran 313 in the first few runs and has since made a pb of 336kw. All that and its also lighter

how would it go with heat soak? Lap after lap?

[Russman]

The cooler was definitely the restriction. I got the blitz kit and now we're making 280 on 19psi. We wound it up to 20.5 accidentally and it made over 300 so yeah. Happy that it's no longer held back.

thanks for help and comments guys.

[darrinspencer]

  On 02/08/2011 at 11:28 PM, Russman said:

The cooler was definitely the restriction. I got the blitz kit and now we're making 280 on 19psi. We wound it up to 20.5 accidentally and it made over 300 so yeah. Happy that it's no longer held back.

thanks for help and comments guys.

Interesting result.

I have a ne0 rb25 with a gt3076R .82 IW and just had a retune. It would not make any more power than 258kw on 17psi

They tried upto 19psi with no gain...2hp only

The tuner believes it is a restriction somewhere...they thought the exh manifold maybe.

I have a JJR (china) 600x300x75 cross flow core...hmmm maybe.