I have tried to intercool my BJ40 / 3B with an AXT turbo with an air to air intercooler.
I think I have failed as I seem to have a significant pressure drop across the cooler. Before intercooling I had set the Boost limit to be 15 PSI. With intercooler plumbed in - I am barely pushing 10PSI. (measured near inlet manafold) I already playing the boost vs EGT game so losing 5PSI is not good..
I used a ebay IC (http://www.ebay.com.au/itm/Turbo-Al...93?pt=LH_DefaultDomain_15&hash=item27cbc95631). I thought this one might fit easiest (same side ports, only 70mm thick). Noting I have battery trays that need to be negotiated around...
I also assumed that it probably would be big enough for a low HP engine like a 3B. And it meant I only had to move the radiator back by 8mm... And I had just enough space to bring both hot and cold 2.25 inch pipes up the radiator shroud and then around a 90deg bend and on down the engine...
To check if I had major leaks - I have tried plugging both ends (welded up 2.25 inch pipe) and pumping up the IC and pipes with a compressor. The pipes do leak very slowly (15psi down to 10psi took 30 seconds and another 5min to get to 5psi)
I have also tried removing the IC and shorting the in/out intercooler elbows together.. I think roughly I lose about 1.5PSI in total in the piping..
Therefore I have to assume I am losing 3.5 PSI in the cooler...
Have I done something wrong here? Is my ebay IC crap? Is my design flawed?
Should I have invested more heavily in a better IC?
thanks in advance to those who respond..
I think I have failed as I seem to have a significant pressure drop across the cooler. Before intercooling I had set the Boost limit to be 15 PSI. With intercooler plumbed in - I am barely pushing 10PSI. (measured near inlet manafold) I already playing the boost vs EGT game so losing 5PSI is not good..
I used a ebay IC (http://www.ebay.com.au/itm/Turbo-Al...93?pt=LH_DefaultDomain_15&hash=item27cbc95631). I thought this one might fit easiest (same side ports, only 70mm thick). Noting I have battery trays that need to be negotiated around...
I also assumed that it probably would be big enough for a low HP engine like a 3B. And it meant I only had to move the radiator back by 8mm... And I had just enough space to bring both hot and cold 2.25 inch pipes up the radiator shroud and then around a 90deg bend and on down the engine...
To check if I had major leaks - I have tried plugging both ends (welded up 2.25 inch pipe) and pumping up the IC and pipes with a compressor. The pipes do leak very slowly (15psi down to 10psi took 30 seconds and another 5min to get to 5psi)
I have also tried removing the IC and shorting the in/out intercooler elbows together.. I think roughly I lose about 1.5PSI in total in the piping..
Therefore I have to assume I am losing 3.5 PSI in the cooler...
Have I done something wrong here? Is my ebay IC crap? Is my design flawed?
Should I have invested more heavily in a better IC?
thanks in advance to those who respond..