JacktheRiffer Posted September 21, 2015 Share Posted September 21, 2015 Trying to pick a motor for my race car that will never see street time. Looking for 450-500whp. I know either will be abit pricey but which can do it easier and more reliably? Quote Link to comment Share on other sites More sharing options...
johnc Posted September 21, 2015 Share Posted September 21, 2015 Toss a quarter. Either one can do it and your money will be in the engine management system and tuning. Quote Link to comment Share on other sites More sharing options...
JacktheRiffer Posted September 21, 2015 Author Share Posted September 21, 2015 Would there be a reason to go with one over the other assuming both will be run on megasquirt? Quote Link to comment Share on other sites More sharing options...
Zetsaz Posted September 22, 2015 Share Posted September 22, 2015 RB25 will be much newer and have more aftermarket support, I believe. That's the main advantage. Plus twin cam vs single cam and other more modern bits. Quote Link to comment Share on other sites More sharing options...
BluDestiny Posted September 22, 2015 Share Posted September 22, 2015 Running an rb25 on megasquirt would be a hassle. There are better engine management units that can get the job done with less headache and much more support. The rb25 will also be much easier to bring to that level, since you don't even need to crack the block open. Quote Link to comment Share on other sites More sharing options...
johnc Posted September 22, 2015 Share Posted September 22, 2015 At the 500hp level I would want a lot more sensors and control then what I understand Megasquirt can support. The level of aftermarket support for the L-Gata engine and RB25 are pretty much equal here in the US. Look beyond the typical JDM store and you'll find a lot of stuff for the L-Gata engine. Again, its pretty much a toss up. Quote Link to comment Share on other sites More sharing options...
johnc Posted September 22, 2015 Share Posted September 22, 2015 The rb25 will also be much easier to bring to that level, since you don't even need to crack the block open. If you're building a 500hp engine with a used engine as the base, IMHO, you better crack that block open and make sure everything is in good shape. Quote Link to comment Share on other sites More sharing options...
bradyzq Posted September 23, 2015 Share Posted September 23, 2015 There are many plug'n'play ECU options for the RB... Quote Link to comment Share on other sites More sharing options...
seattlejester Posted September 23, 2015 Share Posted September 23, 2015 The mspro seems to be quite an advanced system, seems like you can generate bias curves for sensor inputs as well as scalars. Even with the older models you can set certain thresholds for additional sensors like knock sensors, but that is pretty archaic compared to modern ECU's. L30ET would require boring the cylinders out, I think forged pistons if you are going the KA24de piston route, a custom turbo manifold or at least a bit of modification to fit in an appropriate sized turbo, bigger injectors, new ECU harness, more advanced ECU, tuning. RB25DET would require a turbo manifold, bigger injectors, either an ECU flash or aftermarket ECU/maybe a piggy back, tuning, custom engine mounts, driveshaft, transmission mounts. If you want that kind of power level at a reliable point, I would be tempted to look for motors that come factory with those kind of levels. LS2 I think came with 375hp in certain cars. Quote Link to comment Share on other sites More sharing options...
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