Moderator: The Mod Squad
BlakeNZ wrote:No. it is unlikely to go near that, as we know that the 264 cams and cam gears gained your car 31kW, and my cams aren't installed. Also, I'm on standard fuel system, so probably limited to around 250kW at rears. The dyno is simply to establish if the car is worth putting more effort into.
If it looks promising, then the camshafts will go in(high lift Kelford 260s- designed to complement/max out the stock turbos). I will also put in bigger injectors.
BlakeNZ wrote:It's hard to know how good they are, but he assures me that the extra lift over the hks or brian crower cams will yield better results. The HKS and jun profiles have been around a long time now, and appear to have been superceded by GSC and kelford (at least according to supra owners in America). BC and kelford and GSC all tend to much more affordable than hks($1250ish) and jun($1450ish last time i checked)
If i do get to install these Kelford ones, it will give us a fairly good indication as to what suits a maximum effort stock turbo JZ application, as we have already done the BC264 cams (before and after) dynos on a stock turbo 1jz.
According to our results, the BC 264s gave a fantastic gain, much more than my HKS 256 cams in my previous 1jz. On that car, we lifted the rev limit to 7500rpm. (The rev cut may be at 7600rpm, I can't quite recall)
A rough guide is that the cams are giving an extra 1000rpm of usable power.( factory power falls away quite quickly after 6300rpm from memory)
BlakeNZ wrote:does he have electric fans and you have viscous and shroud?
BlakeNZ wrote:Today,jhe car peak boosted at 17.8 psi. This is without a boost controller, and with ported waste gates. Strangely, despite being able to give it a full rev run, and 4 psi more boost,and having ability to fully tune ignition and fuel, it didn't make any more power. Given the unlikeliness of this occurrence, I'm sure I have a problem either with the ECU or the tuner.
Sadly, the car stopped producing boost, which became understandable when they found one of the ceramic exhaust wheels at the back of the dyno bay!
BlakeNZ wrote:The car did 13.5 on stock ECU because it hit boost cut.
unfortunately, we have no idea what the pulse width of the injectors are doing on the stock ECU. It doesn't give the same feed back a Power FC does.
e30-323ti wrote:and chances are, they can not physically pump more that 17-18psi (thus the apparent 'stabilising) as they are well out of their efficiency range.
ps.I've got a pair of good twins under my bench if you need more cannon fodder.
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