J Taylor Posted October 17, 2006 Share Posted October 17, 2006 I think I've found the limit of a stock rb25det....somewhere around 600hp. lol. It made a shitload of power and was an absolute monster....too bad it was shortlived. Apparently the ringland is the weakest link. Venus auto sells rb25's for $800 minus turbo and accessories so I think I'm going to purchase one tomorrow to throw in the car for the time being until I can swing buying some good parts to put it in this one. I'll just have to "detune" it a bit. At least I got to have a little fun with the car.....whooped up on a Hennessey Twin Turbo Viper this weekend. Also put a hurtin on a 600+ hp Kenne Belle Cobra and a RC51 (1000 cc bike). Should have vids up sometime soon of the races with the viper. JT Link to comment Share on other sites More sharing options...
Garrett76Zt Posted October 17, 2006 Share Posted October 17, 2006 Dangit, put that crap back together! We're supposed to race, haha. Link to comment Share on other sites More sharing options...
Alex_V Posted October 17, 2006 Share Posted October 17, 2006 Man that sucks! Oh well its not a thrown rod or anything. Do you think its just timing related? or just too much power? ~Alex Link to comment Share on other sites More sharing options...
J Taylor Posted October 17, 2006 Author Share Posted October 17, 2006 I imagine it's just too much cyl. pressure for the cast pistons. I was really pushing this motor hard.....gotta figure it's a 9:1 motor on 20psi from a fairly large turbo with what came out to be 200 horses of nitrous....on pump gas. lol. I knew something would go in the near future. JT Link to comment Share on other sites More sharing options...
Kennysgreen280zt Posted October 17, 2006 Share Posted October 17, 2006 dang, I was wondering how long that would stay together. Link to comment Share on other sites More sharing options...
turbo_fb Posted October 17, 2006 Share Posted October 17, 2006 I am going for the same engine build as you, but gonna run 22psi of boost. Guess I should get thoose forged pistons and rods before I put the engine in. Interesting post though. Finally someone took the testing a bit further and actually found a limit Link to comment Share on other sites More sharing options...
wigenOut-S30 Posted October 17, 2006 Share Posted October 17, 2006 I was out there for "testing" heh.. it was freaking wicked..Glad you found a place that sells the blocks for a decent price Jon. Link to comment Share on other sites More sharing options...
eh? Posted October 17, 2006 Share Posted October 17, 2006 Sorry to hear man. How much were you pushing daily before making 595? I recall you made something like 480ish? Also what was your rev limit set too? Link to comment Share on other sites More sharing options...
J Taylor Posted October 17, 2006 Author Share Posted October 17, 2006 turbo_fb: I honestly wouldn't bother with putting in good pistons if I was you. Mine has been holding up for over a year at the 450-500rwhp mark. eh: Rev limit has been set to 7900. JT Link to comment Share on other sites More sharing options...
BayAreaZT Posted October 17, 2006 Share Posted October 17, 2006 Well at least you know the limits now. Good info for future builders. Now get those vids up Link to comment Share on other sites More sharing options...
v8dats Posted October 17, 2006 Share Posted October 17, 2006 you should check this add in the classifieds. maybe it will help! http://classifieds.hybridz.org/showproduct.php?product=3166&cat=all Link to comment Share on other sites More sharing options...
AKWIKZ Posted October 17, 2006 Share Posted October 17, 2006 Don't know if this might interest you, but I still have one RB30 block and a brand new set of Wiseco forged pistons. These pistons are a 9:1 C/R and are 1mm oversized to yield almost 3.1 liters. If you are interested, I'm looking for $1900. Brian Link to comment Share on other sites More sharing options...
J Taylor Posted October 17, 2006 Author Share Posted October 17, 2006 I've thought about the rb30 bottom end but isn't the block taller than the rb25 block? If it is then it wouldn't work as my whole setup (i.e. header) was built around the current configuration, and there is not alot of room to play with. If I had to start from scratch, I would proably start with a rb26/2jz next time around. JT Link to comment Share on other sites More sharing options...
Kennysgreen280zt Posted October 17, 2006 Share Posted October 17, 2006 are you running stock cams? 7900 is higher than I thought it would go Link to comment Share on other sites More sharing options...
RB26powered74zcar Posted October 17, 2006 Share Posted October 17, 2006 I've thought about the rb30 bottom end but it's the block taller than the rb25 block? If it is then it wouldn't work as my whole setup (i.e. header) was built around the current configuration, and there is not alot of room to play with. If I had to start from scratch, I would proably start with a rb26/2jz next time around. JT Thats the only reason I didn't jump on one of those RB30 blocks AKWIKZ was selling. Link to comment Share on other sites More sharing options...
J Taylor Posted October 17, 2006 Author Share Posted October 17, 2006 I try to shift it at 7500 just b/c of the oil pump issues these motors have been known to have. The limiter is set to 7750 but it comes in at 150 over that which is 7900. On the dyno at 7750 the power is still climbing....never flattens out. If I wasn't scared of the oil pump deal I would like to pull it to 8500 just to see what it does. On the nitrous I was trying to only take it to 7200 just for an extra little margin of safety. No real need to rev the crap out of it on the gas.....it pulls like a freight train regardless of rpm. JT Link to comment Share on other sites More sharing options...
AKWIKZ Posted October 17, 2006 Share Posted October 17, 2006 Yes, the RB30 is 1 inch taller. I just thought I would throw it out there. The set up you have right now on this bottom end with the forged pistons would be insane. If you are already near 600, I would be willing to bet you would be around 750 at the same boost. Brian Link to comment Share on other sites More sharing options...
hotimport Posted October 17, 2006 Share Posted October 17, 2006 oh man i sorry about youre motor not talking you were you need to be. But its only patience that will get you there. Good luck with the build up. Link to comment Share on other sites More sharing options...
Evan Purple240zt Posted October 17, 2006 Share Posted October 17, 2006 Whoops! Sweet. Jon, any idea how much flywheel HP you were making? I think alot of people are forgetting that most people laying down big ponies are using a manual, and that auto I know is costing you 50+ hp from talking to garrett. Evan Link to comment Share on other sites More sharing options...
J Taylor Posted October 17, 2006 Author Share Posted October 17, 2006 Well, the car should have been making around 630 to the wheels. If you figure 15-20% loss.....roughly 725-755 flywheel, right? And yeah, the auto cost me almost exactly 50 rwhp. Pretty crazy if you figure if I still had the 5 spd.....680 rwhp......what, 780+ flywheel?....on 93 octane. It's all just BS'ing but still fun to think about. lol. JT Link to comment Share on other sites More sharing options...
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