Intercoolers? Suffering From Pressure Drop

[sriver killer]

Hey guys

Ive got a 3076R on a rb25 with all supporting mods,

6boost, plasmaman, fmic etc

Struggles to make any more than 360rwhp on 18 psi due to pressure drop

It is seeing 24 psi before the intercooler and only 18 psi at the inlet manifold.

its a chinese intercooler, 600X300X76

Ive had a search already

looking for an intercooler that won't pose as much restriction

have had a quick search...

I think i'm after a 600X300X100

what do you guys normally recommend/use

Looking for an intercooler that doesn't pose much of a restriction/ reasonable cooling properties

any body using the jjr intercoolers?

Edited January 27, 2011 by sriver killer

[Johny Bravo]

It may just be a cheap design, what size are the inlet and outlet pipes?

This is the same size but might be better? dunno, i just wanna see what people respond to your q.

http://www.justjap.com/store/product.php?productid=19813&cat=430&page=1

Have a look around on Just Jap, they prob got what you want.

Kurt

[R31Nismoid]

You dont neccesarily need a bigger cooler - just a better one that doesnt have a cheap ass core inside it that doesnt flow.

There are plenty on the market, just comes down to your budget.

[boostn0199]

It may just be a cheap design, what size are the inlet and outlet pipes?

This is the same size but might be better? dunno, i just wanna see what people respond to your q.

http://www.justjap.c...&cat=430&page=1

Have a look around on Just Jap, they prob got what you want.

Kurt

I got the jjr return style cooler and im pushing 307kw and its not acting as a restriction but I would imagine the bar and plate core will be the same quality just different pipe configuration.

[sriver killer]

yer ive got a cheap arse one xd

3 inch in 3 inch out

I'm leaning towards the 999 automotive "kls power spirit" 4 inch core, 600 X 300 X 100

apparently they flow well, the guy at the shop guarantee's that at 30psi there is only 2psi pressure drop.

sounds like they might be the one,

anybody used one of these?

[HEKT1K]

Blitz CS.. from Just Jap. $800 and will push heaps of power

[89CAL]

you dont need a 100mm thick intercooler for that sort of power.

A decent quality 76mm core will be fine. The thing im guessing from your setup is that your core is not flowing well (as said above) and therefore creates a restriction. Now your boost signal for your boost controller or wastegate is most likely taken from your hot side (turbo side) of your intercooler so its boosting to 24 psi as it is seeing on that side. however it is hitting 24psi due to a restriction in the intercooler which is all of a sudden non existant after the outlet so the air can flow nicely into the engine, and theres your 18psi.

Ive never heard of anyone needing a 100mm core to hit 300ish rwkw, I mean if thats what you want to do then go for it

but remember, Quality over quantity

[The Dan]

Noel runs a cooling pro from Justjap at 550hp at the wheels - pretty sure it's only 76m. Gervase runs a Nismo 100mm.

PWR make good quality stuff for the Skylines. I used to get 1psi pressure drop in mine at 26psi at those power levels but it's the old vertical core design. I don't think you can get them any more

[sriver killer]

awesome, i'll have a chat with noel tomorrow.

if i can get away with just a 76mm, that would ease with space

just jap cooling pro could also do the job.

yes my china cheapie is restricting it =[ not flowing too well.

btw dano cheers for the egt's, they are working a treat! what bear do you drink?

[The Dan]

np mate. Yeah ask Noel what he runs (it was already in when I got the car) it has no dramas.

I don't drink bear or beer. Scotch is my poison but it is not necessary. All in the good will help others thing I got goin on

[sriver killer]

threw on the kls powerspirit (999 automotive) intercooler, 4 inch core

Bolted in sweet without even having to touch my front bar or reo.

intercooler definitely looked alot better than the one i had on. the fins on the inside where the air flows through only had a 5mm path to go through.

vs the 10mm or so for the kls power spirit

btw dano i pulled apart that tial 44mm gate.

had a small blue spring (rated 7.252 psi) and a large red spring (rated 10.153 psi)

with this combination it was originally running about 22 then creeping to 24 psi

removed the small blue spring. Now running the large red spring only now it hits 15 psi and creeps to 17 psi

[The Dan]

threw on the kls powerspirit (999 automotive) intercooler, 4 inch core

Bolted in sweet without even having to touch my front bar or reo.

intercooler definitely looked alot better than the one i had on. the fins on the inside where the air flows through only had a 5mm path to go through.

vs the 10mm or so for the kls power spirit

btw dano i pulled apart that tial 44mm gate.

had a small blue spring (rated 7.252 psi) and a large red spring (rated 10.153 psi)

with this combination it was originally running about 22 then creeping to 24 psi

removed the small blue spring. Now running the large red spring only now it hits 15 psi and creeps to 17 psi

Yeah the large red was the one we added before he sold that kit. Did you notice I changed one of those wastegate bolts to a longer one to make it easier to get the cap back on?

We changed it on the car, did you do the same or remove it?

If you get the chance, to make things easier, get an exhaust shop to weld in a flexible bellows in 1-3/4 inch for the gate, it will make it so much easier to put on if you ever need to

[sriver killer]

first thing i noticed before i put the thing on was that longer bolt

came in handy i changed it on the car with a bit of elbow grease. using the longer cap headed bolt to get it started and bring it home

thats a handy idea,

had to modify the original dump that i got to the point that the only thing left of it was the dump of the turbo aswell as the front half of the plumback return for the wastegate.

sits like a beauty now tho!

new diaphragm in the gate? never thought you could buy parts for these

[Beer Baron]

seems like you've already bought one now but for me, 70mm ARC core would have done nicely, they are light, low pressure drop and allow good airflow over the core through to the radiator too which is something not many makers consider.

[sriver killer]

seems like you've already bought one now but for me, 70mm ARC core would have done nicely, they are light, low pressure drop and allow good airflow over the core through to the radiator too which is something not many makers consider.

seems alrite so far, throttle respose definitely improved

i did notice that the thing was heavy and a bit awkward to mount up for one person.

she weighed at least 12 or so kg

find out the result tmrw

[Beer Baron]

yeah, ARC 70mm coolers weigh 4kgs..... something to think about! especially when that weight is right up the nose of the car where you least want it. their 70mm GTR cores are actually lighter than the standard 60mm GTR cooler. the chinese cores are super heavy. just like the chinese radiators... feel the weight of a aftermarket chinese alloy radiator vs a stock calsonic radiator. the difference is startling.