RS500

forgot to ask what flange the HKS exhaust manifold has?

clarkey, fyi, the Garrett GT3071R actually runs the GT30 exhaust wheel as found in the Garrett GT30R or HKS GT3037S. this combo would be good for a nice and efficient 450hp, and given that you're upping the engine capacity to 2.4L, it wouldn't be very laggy with an A/R .63 exhaust housing. although if you're after a slightly more responsive, the garrett GT3071R (with 90 trim exhaust wheel and internally gated A/R .86 exhaust housing) would be ideal as it has the same compressor wheel as the above mentioned GT3071R although with a slightly smaller exhaust wheel to allow for better response. fyi, this combination is exactly the same as the mighty HKS GT2835R where an easy ~250-260rwkw is achievable. good luck anyway, let us how you go.

the GT3071R with an A/R .63 would be ideal if u were building your engine as a RB24, otherwise a little more responsive would be the GT3071R with 90trim exhaust wheel. this is identical to the HKS GT2835R. 44mm external w/gate (Tial to be exact) should do u perfectly. it sounds like it's gonna be a nice toy to have, enjoy

hi there, given the table u have attached here, can you or may SK tell me what supply voltage was used as to obtain the mentioned results? the reason i ask is that i have some information on the bosch motorsport pumps which i actually recieved directly from Bosch that indicate their flow capabilities to actually be less than what has been stated here earlier. please refer to the table below (as per Bosch motorsport Components - Fuel pump technical data); 0 580 254 040 - 102 ltrs/hr @ 6.5 Bar 0 580 254 044 - 200 ltrs/hr @ 5 Bar 0 580 254 046 - 207 ltrs/hr @ 3 Bar 0 580 254 910 - 130 ltrs/hr @ 5 Bar 0 580 254 975 - 165 ltrs/hr @ 5 Bar 0 580 254 984 - 165 ltrs/hr @ 5 Bar fyi, operating voltage = 12V.

congrats on the 12.9 troy, good effort. can i ask what power/boost u ran for that run?

running the genuine garrett GT30R (with GT37 56 trim comp wheel) with an A/R .82 exhaust housing would be ideal in giving you the power and response you want/need.

dude, the HKS GT2835R is your best solution, it will give you the air-flow you need for 250rwkw with the response you require as a street car. Garrett also offer the same spec turbo with an internal wastegate which flows the same a the HKS turbo, so financially this would be the cheaper way out.

genereally garrett sell their GT30 turbo range non-wastegated, although some places such as horsepowerinabox have a adapted a internally gated T3 exhaust housing to the GT30 core. your choice on wheel specs, housings, etc, should depend on the amount of power that you require out of your engine, and how/when you want the power to be produced.

dude, picking the right turbo all depends on what kind of performance you want from your car. you need to work out the power level you want and where you want your power so that you match the correct turbo to your engine for your requirements. also, the naming convention you use for the GT25 range doesn't really apply to the garrett range all that much, it's more towards the hks range. so when u mention you'll be getting the GT25/30, which turbo is that exactly?

this is what i was able to find; http://www.atpturbo.com/root/maps/gt3071r.htm

SK, the Garrett GT25R u mention above is a mismatched turbo that requires high boost as to provide the required air-flow to make ~400hp, with the addition of plenty of lag given the larger (dinosaur age technology) 48 trim T04S compressor wheel which is more suited with the 84 trim GT30 turbine wheel as to work more efficiently. Our friend would would be much better off with a turbo which houses a smaller compressor wheel with the same turbine wheel to provide a better balance b/w boost build up and air-flow. given this and the requirements of the car, i recommend the 350 or 400hp GT25 (446179-0031 or 446179-0032) which use the GT35 compressor wheels. these are much more efficient turbos which can provide the required ~200rwkw or more at 1.3 bar. for a real life example, a friend used the larger of thes turbos (56 trim compressor wheel and A/R .64 turbine housing) and managed to produce 222rwkw on 1.3bar from an internally standard RB20DET with a larger FMIC, Unichip, Bosch 040 fuel pump, K&N air filter and malpassi fuel reg. the car was quite responsive and nice to drive also.

that's cool. if at any stage you are, just let me know.

also, don't forget that the HKS GT2835 Pro S is only rated at 420ps which you are already producing at the rear wheels, so it might be running out of efficiency.

what kind of boost do u run? well according to HKS, the A/R .68 exhaust housing is the one suited/recommended for the RB25 (check link below), but given that you have so many mods to your intake, cams and the larger valves, it seems that the engine is producing too much gas flow which the .68 can't handle (or maybe even the 2835 turbine wheel), therefore you might need to go up to the A/R .87 which is available for the GT2835 Pro S. http://www.hks-power.co.jp/products/turbo/...o/ac_gtpro.html

on what engine?

just wondering if you'd be interested in selling the hks split dump separate?

yeah, P.E.T Modifications are in thomastwon, melbourne. they are actually Autronic agents, so they're quite good when it comes to tuning the Autronic ECU. fyi, all 3 of their 9 sec VLs are running autronic SMC. http://www.petmodifications.com.au

did u say HKS GT-RS?? check this out, once again, it's basically the same core with the option of the 48 or 56 trim compressor wheel http://www.atpturbo.com/Merchant2/merchant...tegory_Code=GRT

dude, if u want good street drivability with plenty of poke from your RB20, then you'd want to go for something a little smaller. i'd recommend something like this; http://www.atpturbo.com/Merchant2/merchant...tegory_Code=GRT it is the garrett equivalent to the HKS GT2835R which can flow a nice ~420hp. or this one; http://www.atpturbo.com/Merchant2/merchant...tegory_Code=GRT this one comes with the smaller 84 Trim exhaust wheel and an A/R .64 exhaust housing and is equivalent to the HKS GT2835. give these some thought, as i believe you'll be able to get these shipped over to melbourne for less than $2k AUD.

dude, an RB20 does not flow like a SR20 does, so that's not a very good comparison.

if you're talking to me, NO!! i think 250rwkw is a very good effort from any car/engine. all that i am saying is that teh smaller turbos are not suited for larger engines as they will only be choking them and not running efficient when higher boost/power levels are required.

i believe the GT2871R or GT-RS are too small for the RB25DET. they are better suited to a 2L. ideally, you'll be better off looking for a second hand HKS gt2835 or GT3037 as they are better suited to the larger RB25DET. check this guy out, he just happens to have one. http://www.banzaimotorsports.com.au/

first thign you'd want to do is get rid of that stock cooler and fit an efficient front mount, as currently u r being robbed of a lot of power.

dude, send pics to rs0500@hotmail.com. where in melbourne r u?

what's the best price you'll take?