Guest Zcarsmakemyheadhurt Posted July 1, 2005 Share Posted July 1, 2005 I think we are overlooking a big part of hellraisers combination. First off the power goals, 450-750 is a pretty broad range. If your going to go with a 90MM T-body I would assume your going to use at least 3" intercooler pipes and a core that is going to flow. If this is the case I wouldn't be looking at A GT35 unless you are going to use two. If you want a responsive turbo that is going to fill the large area you are creating go GT4067. If you don't want to spend $1450.00 or so look at a properly sized "T" series turbo. If you don't mind useing off brand turbos I have very, very affordable units that work just fine on cars under 750hp or I can build all Garrett units affordable. Good luck. Quote Link to comment Share on other sites More sharing options...
hellraiser Posted July 2, 2005 Author Share Posted July 2, 2005 i just realized that there is a typo on the thread it should be 450-75 500 hp being the limit as ive read is also the safe limit on stock internals of the 25det, i do have the 90mm t-body and in the works of getting the "greedy" intake the cooler is fairly large and ended up getting the gt35r, the missing ingredient is the correct size injectors for my goal Quote Link to comment Share on other sites More sharing options...
hellraiser Posted July 2, 2005 Author Share Posted July 2, 2005 i could use a turbo for the l28 block, ill be using the 60mm t-body so my goal as far as hp will be around 350 to the wheels I think we are overlooking a big part of hellraisers combination. First off the power goals, 450-750 is a pretty broad range. If your going to go with a 90MM T-body I would assume your going to use at least 3" intercooler pipes and a core that is going to flow. If this is the case I wouldn't be looking at A GT35 unless you are going to use two. If you want a responsive turbo that is going to fill the large area you are creating go GT4067. If you don't want to spend $1450.00 or so look at a properly sized "T" series turbo. If you don't mind useing off brand turbos I have very, very affordable units that work just fine on cars under 750hp or I can build all Garrett units affordable. Good luck. Quote Link to comment Share on other sites More sharing options...
S15 200sx owner Posted July 2, 2005 Share Posted July 2, 2005 i just realized that there is a typo on the thread it should be 450-75 500 hp being the limit as ive read is also the safe limit on stock internals of the 25det, i do have the 90mm t-body and in the works of getting the "greedy" intake the cooler is fairly large and ended up getting the gt35r, the missing ingredient is the correct size injectors for my goal Good choice! with the GT35R IMHO. Clint T Quote Link to comment Share on other sites More sharing options...
Clifton Posted July 12, 2005 Share Posted July 12, 2005 A GT35 doesn't flow nearly as much as a GT35R. Don't bother with a GT30R, it will barely do 50 lbs. May as well save your money and run a T3/4. The 35R will spool fast enough and meet your goals. Quote Link to comment Share on other sites More sharing options...
240Z_Master Posted July 13, 2005 Share Posted July 13, 2005 For my application, I think I want to use a GT3076R. It's still got ball bearings unlike the GT32 series which doesn't. I won't be needing as much power with the GT35 or the GT35Rs so look into that if you don't want huge huge power, but enough power. http://www.turbobygarrett.com/turbobygarrett/catelog/Turbochargers/GT30/GT3076R_700382_12.htm Quote Link to comment Share on other sites More sharing options...
260ZRED Posted April 5, 2007 Share Posted April 5, 2007 any one know the hp potential on the rb25 factory turbo??? thanks Quote Link to comment Share on other sites More sharing options...
240Z_Master Posted April 5, 2007 Share Posted April 5, 2007 any one know the hp potential on the rb25 factory turbo??? thanks 350WHP Max Safely if you're lucky... maybe a bit more, but not much. Quote Link to comment Share on other sites More sharing options...
Evan Purple240zt Posted April 5, 2007 Share Posted April 5, 2007 Anything above 13psi and your asking to blow all the blades off of the turbo. Its not a matter of if, its when. Ceramic blades suck. Quote Link to comment Share on other sites More sharing options...
260ZRED Posted April 5, 2007 Share Posted April 5, 2007 really, i was planning on running 15 psi. do any of the above turbos bolt on 100%. Quote Link to comment Share on other sites More sharing options...
240Z_Master Posted April 5, 2007 Share Posted April 5, 2007 really, i was planning on running 15 psi. do any of the above turbos bolt on 100%. The only one I can think of that bolt's on 100% is the HKS turbo, ask Chris Rummel about this turbo. In fact I might get it myself down the line as well. Quote Link to comment Share on other sites More sharing options...
ZDrifter Posted April 6, 2007 Share Posted April 6, 2007 I have already decided Im gonna go with the gt35r. Im hopefully going to be piecing together my turbo kit this summer but I still havent found a good quality high mount turbo manifold for my needs, so Im thinking I might just build my own. I want to be around 420-450hp range on pump gas. I will be getting a apexi power fc within the next couple months. I actually got my car running well now, since I found a knock sensor that came out and hasnt been plugged in since I did the swap....sad I know but shes running like a champ now!!! My plan is greddy intake, 90mm tb, redo all my intercooler piping and intercooler and go to cross flow, top mount turboheader, 550cc injectors, gt35r, metal head gasket. I dont think Im forgetting anything....for now haha Quote Link to comment Share on other sites More sharing options...
jknc90 Posted April 7, 2007 Share Posted April 7, 2007 I have already decided Im gonna go with the gt35r. Im hopefully going to be piecing together my turbo kit this summer but I still havent found a good quality high mount turbo manifold for my needs, so Im thinking I might just build my own. I want to be around 420-450hp range on pump gas. I will be getting a apexi power fc within the next couple months. I actually got my car running well now, since I found a knock sensor that came out and hasnt been plugged in since I did the swap....sad I know but shes running like a champ now!!! My plan is greddy intake, 90mm tb, redo all my intercooler piping and intercooler and go to cross flow, top mount turboheader, 550cc injectors, gt35r, metal head gasket. I dont think Im forgetting anything....for now haha ZDrifter, I've got a Q45 90mm TB if you're interested. send me a PM (dont want to jack hellraiser's thread) Quote Link to comment Share on other sites More sharing options...
Rumnhammer Posted April 7, 2007 Share Posted April 7, 2007 The turbo I fitted onto the RBZ is an HKS GT2540, it is 100% bolt on to the stock RB25DET manifold, it is internally wastegated, it has a metal turbine wheel instead of the stock ceramic, externally it is the same size as stock so it fits well, but it has impeller blades that are 7mm larger then stock, and has an integrated divider on the wastegate. It fits into an S30 swap very well. If you get it, see if you can get the HKS upper downpipe that goes with it it is exellent quality and far better then the stock one. This turbo is good for ~400hp, so if that is your upper limit,(mine was) you will really like it, it spools super fast too, an excellent choice for a street car. Very good power delivery. if you want more power to be king of the dyno, then you may want something bigger, but if you want a turbo that fits well, bolts right on, makes good power then this is a good choice. Chris Rummel Quote Link to comment Share on other sites More sharing options...
ZDrifter Posted April 7, 2007 Share Posted April 7, 2007 Good info...Im not lookin for the TB right now but Ill keep you in mind for later on. Thanks! Quote Link to comment Share on other sites More sharing options...
jknc90 Posted April 7, 2007 Share Posted April 7, 2007 no problem ZDrifter, I've got three. if you know anyone that needs one send them my way. thanks Quote Link to comment Share on other sites More sharing options...
triple B Posted April 7, 2007 Share Posted April 7, 2007 so what would you guys recoomend for over 500hp? i am droppin an RB25 into my Z31 and i am using a greddy intake with Q45 throttle body, 700cc injectors a SARD fuel rail, and a tubular top mount exhaust manifold with an external wastegate. i to have been having turbo sizing issues as i want a resonable spool up Quote Link to comment Share on other sites More sharing options...
240Z_Master Posted April 7, 2007 Share Posted April 7, 2007 so what would you guys recoomend for over 500hp? i am droppin an RB25 into my Z31 and i am using a greddy intake with Q45 throttle body, 700cc injectors a SARD fuel rail, and a tubular top mount exhaust manifold with an external wastegate. i to have been having turbo sizing issues as i want a resonable spool up GT35R should hold you for 500HP. But how is your bottom end going to hold? Quote Link to comment Share on other sites More sharing options...
ZDrifter Posted April 7, 2007 Share Posted April 7, 2007 I second that, watch out for the ringlands, they become weak in the 500-700hp range. GT35R will get your there easy but if you want a good solid turbo for 600hp range and dont mind a lil more lag (full boost around 4500-5000rpm) gt42r is a solid turbo. Quote Link to comment Share on other sites More sharing options...
triple B Posted April 9, 2007 Share Posted April 9, 2007 any recomendations on ring improvment then. i was planning on doing camsand valve train since its a good idea anyways whe doing cams and changing the bearings and seals and such ot sure if i am going to do rods and pistons both are forged from the factory if i am not mistaakin. may do pistons to lower the compression ratio a bit Quote Link to comment Share on other sites More sharing options...
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