Intercooler Efficiency

[GTR 400]

Hi i have a just jap 100mmx600x300mm tube and fin upgraded intercooler and i am experiencing a bottle neck somewhere stopping me to make more power, i thought at first my cat was blocked so took it of ran it up on dyno and same power, my tuner thinks that my intercooler cant flow enough and i still have standard piping.

Has anyone bought one of these coolers and got in excess of 330Rwkw, this info will let me know if the just jap coolers are efficient enough for big power or actually a restrictive core over this power.

If this is the case then this may be why Trust,Blitz and ARC for example may charge so much for there products because you pay for what you get i guess, can a $400 jjr cooler flow and be as efficient as a $1100 jap brand cooler well i dont know but i need to find out.

[BAMR33]

Should be right the cooler you have now is huge, plenty of people have made that sought of power with smaller Chinese coolers. What turbo/s are you running, what motor etc.

[R34GTFOUR]

how old is your intercooler? you'd be surprised at the amount of oil that is built up in the intercooler over the years of driving, especially if you dont have an oil catch can, and that can lead to a restriction. What cams you running?

I know of someone that was pushing over 500wrhp and he was running a trust core, then swap over to a china core and didnt make a difference on the dyno, which suprised me.

[GTR 400]

Hi i there i am running the garrett replacement turbos for original items gt28/60r -7rear comp housing.

The motor is RB26DETT with stage 2 tomei poncams adj cam gears, full 3.5 inch exhaust power fc injectors etc, the cooler is new also only 3 months old

[STATUS]

how old is your intercooler? you'd be surprised at the amount of oil that is built up in the intercooler over the years of driving, especially if you dont have an oil catch can, and that can lead to a restriction. What cams you running?

I know of someone that was pushing over 500wrhp and he was running a trust core, then swap over to a china core and didnt make a difference on the dyno, which suprised me.

we just did the opposite JJR GTR cooler to TRUST 115mm and notice a huge differrence in intake temps over a lap.... and we are making only mid 300kw's at the wheels.

[Beer Baron]

I would be switching to an ARC or trust cooler. personally I like the ARC cores but have no evidence to suggest they are any better than the trust ones. they are very light though too. I have noticed a lot of the chinese cores are very heavy. the 70mm ARC GTR core is 5.something kilos vs 8.something for the standard calsonic GTR cooler. not bad that you can have a bigger cooler that is lighter too.

[GTR 400]

Uras do you think that the JJR cooler would not be able to flow and be a noticeable restriction over the 300rwkw range which is what could be giving me a bottle neck somewhere or is the original rubber piping restrictive for big horse power or not.

Also correct me if i am wrong but i have been told that the garrett 28/60r should be able to give a rb26dett with the correct supporting mods which i have up to at least 360Rwkw is this true also.

[STATUS]

Uras do you think that the JJR cooler would not be able to flow and be a noticeable restriction over the 300rwkw range which is what could be giving me a bottle neck somewhere or is the original rubber piping restrictive for big horse power or not.

Also correct me if i am wrong but i have been told that the garrett 28/60r should be able to give a rb26dett with the correct supporting mods which i have up to at least 360Rwkw is this true also.

no as i did some back to back runs with the JJR and the TRUST and it pulled over 320rwkw no stress, it just didnt like repeated pulls, if it is the same core we had i cant see it being "the" restriction you are chasing.

[GTR 400]

Thanks Uras what about the turbos do you think i can get up to 360rwkw with these turbos and the -7 comp housing or do i need the -5 to get there.