HA HA!! you're making poor old Mad Mikes car look a little sad with that info - all the gear is there but the cams haven't been set up correctly & that crappy old Link ECU is just a waste of time. I'm hoping to get nearly as much power as his when I tune mine
550 is about what mine made with TO4z's at 15psi and 693rwhp at 28psi those trubos are much smaller yes?
perhaps a case of WHAT dyno graph! Anyone know what happened with this? Or Nathan? Is the tuning finished? I know this thread was supposed to be a teaser but we have been teased long enough. C'mon, pics or ban!!
670RWHP (500RWKW ) AT 24PSI on pump gas (or race even fuel) with GT28RS ... dont hold your breath for a dyno sheet .
In support of this result ? because I have achieved similar and posted the Dyno Graph. I am at a loss as to the ?fixation? on the need for boost, think about it, air pressure (boost) is achieved by continually pumping air into a system (engine) that has a restriction ? so it follows if there is no restriction there is no build-up of air pressure (boost) which an impossibility with an engine ? but, if you can minimize the restriction through the engine by maximizing air flow with good match-porting, porting, CAM shafts, valve seats, exhaust manifolds, Turbine housings, dump-pipes and finally the exhaust system doesn't it follow that a turbo will continue flow the required amount to produce power at a lower pressure build-up (boost)?. After all, (my understanding is) if the turbo is spinning at ?x? rpm it will move ?x? amount of air, and if the boost is less, the air is colder so the turbo will actually flow more in a low restriction system than one with higher restriction (boost) ? this is most likely about as clear as mud, so cut me ?some? slack as I have had to string more than a dozen words together. My theory anyway and theories are wonderful things.
Makes perfect sense to me. After freeflowing everything, which costs a bazillion pennys anyway, jam it with more boost to give you even more power! :thumbup:
you are 100% correct and understand all that ' BUT you have to realise that the turbos can only flow so much. you can make 414rwkw at 22psi or like yourself 414rwkw at 14.5 by increasing engine flow ,eliminating restrictions but either way you are reaching the limits of turbo efficiency. you think if you take it up to 24psi it will magically pump 500rwkw? the turbo wont pump much more air . you have .86 housings too edit I wouldn't be surprised if the OP's mechanic was quoting him engine hp and he mistaken it for rwhp ...
Larger compressor wheel = more flow... ie: 15psi on stock turbos is not the same as 15psi on GT28RS turbos. The need for more (psi) boost is negated with larger turbos. Bigger the turbo, the less psi pressure needed for the same air flow. To get 550rwhp from the GT28RS at 15psi using a VG30dett even with its tits modded off would still be really difficult if not impossible... 2 Zeds in Perth I know of with similar power have massively modded internals with much bigger turbos... Not saying the initial poster is a liar... Just calling shananigans with the Dyno used on the day for the power figure. Dyno day again anyone? Put this to rest! Hmmmm... Unless an mentioned in earlier posts... This might not be a VG...??
Yep, understand and agree ... if you can make eg: 414rwkw @ 15psi with a smallish Turbo ie; 28rs or in my case tb2804 (GTiR) you may not be able to make much more if anymore boost simply because the turbo cannot flow enough to over come the lack of restriction. I was more trying to make the point the boost is not everything and that good numbers are very possible on low'ish boost without going to huge turbos. It is like most things, a result is a consequence a of a combination of factors working or (in some cases) not working together. Go the .86 housings = endless top end ... more gear changes but
offcourse it is 15psi on stock turbos is not the same as 15psi on GT28RS turbos. how much air a bigger compressor is stuffing into a manifold is irrelevant,because manifold pressure and volume at 15psi is the same for both the stock and 28rs turbos, just ask your actuators or ebc.
Uh.........ohhhhhhh.......here we go again. Now wheres my Michael Jackson popcorn munching .gif???...!!! LMAO OK, ill stay away from this one! E
That assumes the temperature within the manifold would be the same for stock turbo/GT28RS doesn't it? I can't see that being true.
