Harey
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Everything posted by Harey
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Nah I meant like every hose connection that you have made. So your boost source is running from the power steering and your pcv valve is venting to atmosphere.
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1. Dont bother with safc with a GT3076, get a power FC. 2. Not sure, search, pretty sure I saw a thread about that recently. Its not that common. 3. A standard setup makes close to 300hp@engine so not sure where you got 300hp. Common figures are 270-300rwkw with a GT3076 on 18psi. 4. Yes they are good, they are probably the most common turbo used on an RB25. I have not heard of any boost controll issues with the 5 bolt garrett 0.82 rear that you have so who cares about the other problems. 5. Works fine. Dont bother fitting it until you have cash for ecu, fuel pump and injectors. Your standard turbo can almost max out the standard fuel system so no point. As Ash said, just reading through the dyno results will answer most of these questions.
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Not making 288rwkw on 98 fuel, I dont think its possible to get 20psi by 3000rpm. Increasing the ramp rate can move the response earlier too. Mine hits 20psi by 3200rpm (9 second ramp rate) but only makes 245rwkw on 98 fuel.
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Drill a hole into the custom made intake and weld a fitting on??? Then connect the hose to that. Thats what I have done, I have a bov return and a breather return plumbed into a custom intake. As GTScotT said, going back to all standard stuff is a good test to see if its a problem with something else or your modifications. As a troubleshooting exercise can you list out exactly every modification you made to the standard setup?
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Yeah at the same time I certainly dont go just changing things when I have no idea what I am doing. I research and ask as many questions as possible before I do something. If its too hard and too risky then I get someone to do it. If its too expensive that way then maybe I shouldnt be doing it. Think your saving money by fitting it yourself but then you waste more money getting it tuned multiple times as you find and fix issues.
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Your setup is wayyy different, this is bolting on a turbo, intercooler, injectors and afm to a stock setup. Not fair to compare. Full boost under 3000rpm is ludicrous on this type of setup. Even the most responsive of turbos that hit the ceiling at 240-250rwkw cant make 20psi by 3000rpm.
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Great work Mick!! Did you try going any higher with boost just to see how the turbo handles it? My understanding is thats where the GTX shines.
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I thought you also mentioned other symptoms of the car running rough and loosing almost all power after 5 mins or so? Is that still the case?
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Focus on the air leaking with the pressure test, I just run off the actuator and mine runs very well. The lack of an electronic boost controller is definitely not the issue here. Can you describe the steps you use to peform the pressure test?
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Good to hear. I was going to say relying/using this car as a daily seems a bit much. Get a nice cheap daily and take all the pressure off having it driveable all the time. I feel ya pain though, hopefully its an easy road back to running again.
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Any chance of posting up some dyno sheets directly comparing the 3 turbos on the same screen? I am sure Dave's car is a beast! My point was that there are other turbos that can do similar. Is Dave's car with the sexy shiny engine bay? Thats another thing that car has aftermarket plenum etc etc, not a true comparison to bolting a turbo on with a new exhaust, afm and injectors. The 2 Hypergear turbos you have tuned dont necessarily show what they are capable of either. Thats all I am saying is I would love to see a direct comparison. Yes I am bitter that I cant afford a setup like Dave's -
Not sure how relevant this is but Trent gave me a simple way of thinking about the ramp rates, 9 second ramp rate is similar to having 1-2 people in the car, 12+ second ramp rate is like having 3-4 people.
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I never said you had a happy dyno?? All I was saying is if you are using a different ramp rate then the full boost @ X rpm will be different. In this very thread Stao did back to back tests and proved this. Using the same dyno and tuner as Stao uses, I have never seen a HKS2835 Pro S hit full boost before 3500rpm using a 9 second ramp rate. Just trying to compare apples with apples. Come one Sarge fix ya issues BTW these discussions are more on topic then SAU jumpers or zombies
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In this very thread it is shown that the different ramp rate shifts the response around. Longer the ramp rate the better the response.
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Right so kwickr33 makes 307rwkw with the SS2 and Sarge makes 244rwkw. What I am saying is Sarges setup is not doing the SS2 justice. Didnt sarge make like the same power on only 11psi?
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I have seen numerous dynos with the 2835 Pro S making full boost ~3500rpm. I didnt think 3200rpm was possible, was that with a 9 second or 12 second ramp rate? Pretty unfair to compare Sarge's car running 11psi to a 2835 Pro S running high boost. The SS1.5 is a fairer comparison, how does that compare?
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Wow something is majorly wrong there. No wonder your not impressed, heaps of lag and only 230rwkw up top. I know you dont want to hear it but there is a 99% chance its something to do with your setup and not the turbo.
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This is a thread specific to comparing turbochargers. If we dont care what the turbos do then whats the point of this thread! Big difference between 260 and 300rwkw! Full boost still does give you an idea of what the turbo is doing. To me the dyno result at 4000rpm is not the main key factor to a fun car on the street. You can have 200rwkw at 4000rpm but when you go to change lanes or accelerate from low speeds, waiting till 4000rpm to get going is too late imo. It still is a factor, but whats happening at 3000rpm and 3500rpm are very important too.
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I think the lesson is dont expect anyone else to have an opinion on the internet haha I wasnt having a go at you, I was just presenting another side. You were saying the 2835 Pro S is the shizzle, while I think it is an excellent turbo I am saying there are other turbo options. And being in a Hypergear thread that should be expected
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So have you been in an SS2 to compare? Nah no chance a HKS 2835 Pro S is 3200rpm full boost. The best I have seen is 3500rpm. My SS1 makes full boost by 3200rpm and makes 280rwkw on E85 The 2835 Pro S was going to cost me a packet to get setup, this cost me bugger all, has standard turbo response and as you said plenty of power for the street, I love it. Pretty hard to argue with the overall value of a hypergear turbo. Not to mention one of the key results on this forum of the 2835 Pro S is using a dyno with a friendly correction factor as shown by my tuner. Which I think is just so wrong, I dont care if you are big noting yourself but your impacting other people and what they spend their hard earned on.
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To be honest even 4,000rpm at full throttle is not something you will see regularly on the street. Personally, I would be under 50% throttle under 3500rpm most of the time, then when I do want to go I would use WOT and redline. The SS1 has full boost ~3200rpm so boost and power is always there when you need it, but yes in the higher gears you will loose the rush. I am using E85 so its still quite good up top, but an SS2 would kill it up top. SS1/SS1PU for a pure street car that you want to respond very quickly and SS2 for an excellent all round turbo with great response, mid and top end. Stao, I think you have met the needs of 90% of bolt on rb25 turbos. Well Done! To me the 300rwkw mark with 3600-3800rpm full boost was the missing link and the turbo I would choose.
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Did you see kwickr33's result? Full boost at 3600rpm and 300rwkw, thats similar to HKS 2835 Pro S response but with an extra 20-30rwkw! Thats what I am saying I think this SS2 result is breaking new ground!
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I think we have brushed over this result. What a fantastic result from the SS2 307rwkw on 98 fuel with excellent response and full boost by 3600rpm! Post #763 in the RB25 dyno results thread on page 39. I think its worth also posting the dynosheets in this thread as well kwickr33. I compared it to my SS1 result, SS1 makes 10-20kw more power below 3600rpm, same power at 3600rpm and then the SS2 kills it from then on by up to 50-60kw at some points! Imagine E85!!!
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Stock Rb25 Looking For 400+ Whp Proof
Harey replied to Revspeed's topic in Engines & Forced Induction
Using a few of the 1/4 mile calculators, with a 1500kg car and 120mph suggests closer to 400rwhp. 430rwhp would be around ~124mph.
