Kinugawa 25g turbo thread
I'm in the process of ordering the 25g /w billet right now. Was considering the 20g at first since I'm only trying to make ~400whp but I figured I'd leave a little room for the future. Will this cost me some spool response time?
It's going to be run on 91oct, HKS 272 cams, ported intake /w foam filter & ported exhaust with 3" turboback straight pipe.
Can anyone recommend an intake pipe that fits up to the 3.25" opening?
Any recommendations on where to purchase the oil feed line that goes directly from the pump?
It's going to be run on 91oct, HKS 272 cams, ported intake /w foam filter & ported exhaust with 3" turboback straight pipe.
Can anyone recommend an intake pipe that fits up to the 3.25" opening?
Any recommendations on where to purchase the oil feed line that goes directly from the pump?
The 25g spools about 300 rpms slower than an Evo9 stock turbo, when i first installed my turbo i had an Injen intake with an adapter to fit the 3.25" turbo,still have it laying around if you need a cheap intake in good condition let me know, i got my oil feed line from their Ebay store, i think it's 36" with a 4AN fitting.
^ You won't be disappointed, specially considering the price, i just tuned a friend's car with a 20g and it put down 401 on 93 oct on a almost stock engine, i was impressed with that one too. 
Been good man gonna shoot you a txt sometime soon seems as though there's a suspicion of bad Valve stem seals on my car which may be where the oils goin lol I'm gonna open it up next wk and take a look how have you been?
When a turbo is pushed out well out of it's efficiency range the axial and radial forces acting on the turbine shaft as well as heat are way greater than "stock" making the need for better lubrication well warranted, the turbo needs more oil pressure to counteract this forces and help stabilise the shaft and bearings specially if high boost is in the menu, the stock location oil feed is more than adequate for stock boost levels on a stock turbo, not for a high boost high load high heat set up, the stock turbo oil feed port is the very last lubrication port in the whole engine , meaning the oil has to make it's way from the oil pan all the way to the pump, crank, head,cams and then the turbo, which is the reason why i wouldn't trust the very last source of oil pressure in my engine to feed my turbo, also the reason why FP will not warranty their turbos unless you run their oil feed line which feeds straight from the pump.I have actually tested it on an older 4g63....from an evo 3. For the OEM turbo with the small compressor/turbine wheels running from the head is fine even at high thrust loads below 30 psi. I have been running 28 pounds (holds for about 1500 RPM) of boost falling to 24 on my evo 7 turbo for the last few months with no issues. Car put down 416 WHP, 392 ft-pounds FYI. There is no way in hell i would run anything other than an OEM turbo of the head.. so from the bearing failures I have seen I do this...
OEM turbo <30 PSI= head feed ok
OEM turbo >30 PSI= OFH and cross your fingers as the shaft speeds exceed far beyond what it was designed for
any aftermarket journal bearing turbo= OFH with the proper restrictor (if necessary) or you will be sorry
Last edited by mean4g63; Dec 31, 2012 at 04:28 AM.