beaniam Posted November 16, 2013 Share Posted November 16, 2013 I positively identified the turbo the PO used in the swap on my car as a ceramic wheel r33 rb26det turbo with the stock 280zxt 7lb wastegate and some aftermarket 2.5" downpipe. A big FMIC and 2.25" piping. Currently I'm running 12-14psi. At about 13psi it feels like the WG starts to open up sometimes. I'm thinking that's due to the no name ebay manual boost controller. I have a cable controlled Hallman MBC on the way to give that a try but I'm starting to worry about the limits of this turbo. Is it a definite danger of exploding the ceramic wheel at 14psi? Time to go with a t3/04 variant and 3" DP? Engine is a stock f54/p90a. Other details are in sig. I have not run a 1/4 mile or dyno'd the car yet. I did just purchase tuner studio to start running the analyze live. Quote Link to comment Share on other sites More sharing options...
skirkland1980 Posted November 16, 2013 Share Posted November 16, 2013 Back pressure could be what's causing the wastegate to open. Not necessarily the boost controller. If you disconnect the vacuum hose from the wastegate and make a pull, see if the boost stays the same. If so you need more spring pressure on the wastegate. Quote Link to comment Share on other sites More sharing options...
redzedturbo Posted November 24, 2013 Share Posted November 24, 2013 (edited) Do not run or make a pull with the wastegate disconnected!!! that is asking for a engine rebuild. (overboost) What the hell skirkland you know better than that? The ceramic wheels are fine for alot of boost but the epoxy holding it on will not deal with the heat. that turbo 12 psi is safe. I have a turbonetics t04e 50 trim with a bored t3 turbine i get 5 psi at 2500 and all in at 3300 at 10 psi on low and 16 on high boost. I have a homemade 2 stage boost controller. I recommend a t3/t4 on the l28 its a perfect fit. Just don't go huge unless your mods warrant it. Welcome to hybrid man!!! Best of luck. Shame skirkland..... Edited November 24, 2013 by redzedturbo Quote Link to comment Share on other sites More sharing options...
Tony D Posted November 24, 2013 Share Posted November 24, 2013 Waste gate...what's that? Quote Link to comment Share on other sites More sharing options...
skirkland1980 Posted November 24, 2013 Share Posted November 24, 2013 You still have control of the boost with the pedal on the right. Quote Link to comment Share on other sites More sharing options...
beaniam Posted November 24, 2013 Author Share Posted November 24, 2013 (edited) I have no intentions of running with the WG disconnected. I put in the hallman boost controller and the flutter at 13 went away. 12psi is fun, 13 is more fun 14 is more yet. I want more but mostly I want some peace of mind at 14 knowing the turbo isn't going to self destruct. A t3/t4 is in the future. I don't plan on any future mods outside of what's in my sig. What trim would be recommended for that? Edited November 24, 2013 by beaniam Quote Link to comment Share on other sites More sharing options...
Xnke Posted November 24, 2013 Share Posted November 24, 2013 The ceramic wheel RB turbos don't like the higher shaft speeds that occur with higher boost. it's well known and well documented. Quote Link to comment Share on other sites More sharing options...
jeffp Posted February 3, 2014 Share Posted February 3, 2014 seems you are getting boost late. A good setup will give you 22-25psi of boost @ 3K if done right. keep working on it. Quote Link to comment Share on other sites More sharing options...
beaniam Posted February 20, 2014 Author Share Posted February 20, 2014 Not on this turbo I'm not. When the weather gets nicer I've got to decide on what turbo to go with. Quote Link to comment Share on other sites More sharing options...
wigenOut-S30 Posted March 17, 2014 Share Posted March 17, 2014 I have a Garrett T3/T4E 50 trim with a stage 3 exhaust wheel. I have loved this turbo and it matches the L28ET very well. I get 20 psi around 3K or so depending on what RPM you start at. Boost really does not fall off between shifts and makes good power. I made right at 390-400 wheel HP and 400 lbs TQ on pump at 20psi. Are there better turbo's out there? Yes. but for the price It wasn't worth it to me. If you have the money, GT30R would be good or a comparable Borg Warner variant. Quote Link to comment Share on other sites More sharing options...
Sideways Posted March 18, 2014 Share Posted March 18, 2014 I have a Garrett T3/T4E 50 trim with a stage 3 exhaust wheel. I have loved this turbo and it matches the L28ET very well. I get 20 psi around 3K or so depending on what RPM you start at. Boost really does not fall off between shifts and makes good power. I made right at 390-400 wheel HP and 400 lbs TQ on pump at 20psi. Are there better turbo's out there? Yes. but for the price It wasn't worth it to me. If you have the money, GT30R would be good or a comparable Borg Warner variant. May I be nosey and ask what else was done to that motor, or is that a basically stock block? Quote Link to comment Share on other sites More sharing options...
wigenOut-S30 Posted March 18, 2014 Share Posted March 18, 2014 Yeah sure.. here is a rundown on the motor and what I am running. stock bore L28ET blockforged JE pistonsstock forged rods and crank Nismo Metal HGRebuilt P90head 3angle valve job with port matchingGarrett 50 trim T3/t4 turbo - Ported exhaust housing to match gasket and manifoldPTP Turbo BlanketNon turbo "A" camTial 38mm external wastegate3" downpipe and exhaust440CC injectors65mm TB2.5" aluminum IC pipingbar and plate front mount IC50mm tial BOVshaved and ported intake manifoldported exhaust manifoldAluminum radiatordual 12" zirgo electric fansaluminum fuel railWalbro 255 fuel pumpMagnecor plug wiresMega-squirt and Spark ECU Quote Link to comment Share on other sites More sharing options...
beaniam Posted March 19, 2014 Author Share Posted March 19, 2014 I have been looking more into an internally wastegated holset variant lately. Quote Link to comment Share on other sites More sharing options...
l28stockecukingofdyno340p Posted January 20, 2015 Share Posted January 20, 2015 seems you are getting boost late. A good setup will give you 22-25psi of boost @ 3K if done right. keep working on it. hi jeffp tonyd toll me you reach the 400hp at the wheels with stock ECU z32 how you control bigger injectors without modified the internals of the unit and how much boost you adjust it to this numbers what type of boost control you use manual or electronic.please replay Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted January 20, 2015 Share Posted January 20, 2015 hi jeffp tonyd toll me you reach the 400hp at the wheels with stock ECU z32 how you control bigger injectors without modified the internals of the unit and how much boost you adjust it to this numbers what type of boost control you use manual or electronic.please replay The way I ran 370cc injectors with my factory Z31 ECU was to install my airflow sensor element in a proportionally larger intake pipe. The Z31 ECU was programmed to operate 265cc injectors, and I used 370cc injectors (40% higher flow), so I installed the airflow element in a tube that had 40% more area, which turned out to be 3.5" ID. I dyno'd 313 rwhp with that setup and a stock L28ET (about 15psi boost). Quote Link to comment Share on other sites More sharing options...
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