jon5698 Posted September 29, 2009 Share Posted September 29, 2009 I was just talking to Hodge about your engine bay on sunday night, imo it is the nicest looking one i have seen on a supra even better than KDW's ( or what ever he is called ) one Quote Link to comment Share on other sites More sharing options...
Miguel Posted September 29, 2009 Share Posted September 29, 2009 Truly amazing project you have there Eric. A lot of effort has gone into that. A couple of questions for you. I noticed a few pages back that you mention a dynamic compression ratio of 9.6:1. This would put the static CR somewhere in the region of 13~14.5:1. I'm interested to know how this has affected your approach to mapping? Have you had to be a little conservative with timing? What do you think will be your realistic power/boost celling on pump fuel running this CR? Quote Link to comment Share on other sites More sharing options...
cowboy bebop Posted September 29, 2009 Share Posted September 29, 2009 The static CR is the CR without intake valve closing X degrees past BDC. On my engine it's 9.77:1 static. On my cams the intakes close at 37 degrees past BDC, so the dynamic is 9.6:1. The compression in each cylinder supports this as each cylinder is ~175psi, dynamic. Thanks! Eric Quote Link to comment Share on other sites More sharing options...
Scott Posted September 29, 2009 Share Posted September 29, 2009 WTF just happened? Did i flash forward? I don't know if i'm thicker or smarter after reading that. Quote Link to comment Share on other sites More sharing options...
Miguel Posted September 29, 2009 Share Posted September 29, 2009 The static CR is the CR without intake valve closing X degrees past BDC. On my engine it's 9.77:1 static. On my cams the intakes close at 37 degrees past BDC, so the dynamic is 9.6:1. The compression in each cylinder supports this as each cylinder is ~175psi, dynamic. Thanks! Eric I'm not going to question any of that as I don't know any of your internal specifications. What I'm genuinely interested in is your approach to the tuning of what is generally regarded as higher than normal compression ratio for a boosted engine. I'm not here to rain on your parade, far from it, I just have an interest in high compression boosted aplications. I honestly believe it is the way forward, and so do many manufacturers. My original questions apply:) Thanks! Quote Link to comment Share on other sites More sharing options...
cowboy bebop Posted September 29, 2009 Share Posted September 29, 2009 It's har to say now since we're so conservative with the timing as it sits. I think with more tuning with the same boost level, we could possibly see even more gains. It's running Q16 so we have plenty of room to play in the map Thanks!! Eric Quote Link to comment Share on other sites More sharing options...
Scott Posted September 29, 2009 Share Posted September 29, 2009 Stop pussy footing around and lets see what this puppy has got Quote Link to comment Share on other sites More sharing options...
cowboy bebop Posted September 29, 2009 Share Posted September 29, 2009 I'm actually very happy with it right now. I may send it back for some fine tuning and to bump it up slightly, but chasing a number is not in my plan. Thanks! Eric Quote Link to comment Share on other sites More sharing options...
MarkR Posted September 29, 2009 Share Posted September 29, 2009 I'm with Scott M - Lets see some real action from her... pretty please Quote Link to comment Share on other sites More sharing options...
EdMorris Posted September 30, 2009 Share Posted September 30, 2009 Nice video Eric, sounds great on the road. I'm itching to get mine to that stage. Quote Link to comment Share on other sites More sharing options...
cowboy bebop Posted September 30, 2009 Share Posted September 30, 2009 Thanks Ed, it's a whole lot of fun to drive on the street. Eric Quote Link to comment Share on other sites More sharing options...
Guest Yop Posted October 27, 2009 Share Posted October 27, 2009 Hey cowboy, nice build as seen on other forums. Also clean just like your old white supra was, had been looking at this thread before but had to register because I swore I heard a turbo car fly behind my house and well... proofs in the video. Good ol' brooks lane. Quote Link to comment Share on other sites More sharing options...
cowboy bebop Posted January 8, 2010 Share Posted January 8, 2010 (edited) Well, let see here. A lot has been said about this build some good, some bad. But Darin from Titan gave the car a little pressure today and it's outstanding! There's more in it no doubt, especially in the mid range, but even still the car pulls great by just rolling your foot forward. The motor was on it's best behavior. Oil pressure was stable, and engine temps were cool. If anyone ever tells you that the Toyota V8's overheat, you tell them that they're a liar. This is through a Th400, 3400 stall, unlocked converter. 2nd gear pulls. Here are the dyno sheets. 9psi low boost: 19psi new boost: More to come:) Edited January 8, 2010 by cowboy bebop (see edit history) Quote Link to comment Share on other sites More sharing options...
MarkR Posted January 8, 2010 Share Posted January 8, 2010 Some good figures any dyno vids? Quote Link to comment Share on other sites More sharing options...
cowboy bebop Posted January 8, 2010 Share Posted January 8, 2010 No vids unfortunately. I dropped it off last night and picked it up this evening. Darin did and outstanding job, and he offered up some good advice on where low and miderange response can be improved even further. Quote Link to comment Share on other sites More sharing options...
Luxluc Posted January 8, 2010 Share Posted January 8, 2010 Impressive result Quote Link to comment Share on other sites More sharing options...
cowboy bebop Posted January 8, 2010 Share Posted January 8, 2010 Thanks mate! The throttle is like hair trigger. Breathe on it and the car launches. Quote Link to comment Share on other sites More sharing options...
paul mac Posted January 8, 2010 Share Posted January 8, 2010 Holy stump puller Batman, am i reading this correct Eric, 1500 ft lbs of torque Quote Link to comment Share on other sites More sharing options...
JamieP Posted January 8, 2010 Share Posted January 8, 2010 Holy stump puller Batman, am i reading this correct Eric, 1500 ft lbs of torque And 650bhp? strange looking graph. Quote Link to comment Share on other sites More sharing options...
johnny g Posted January 8, 2010 Share Posted January 8, 2010 Must have been a slip? Quote Link to comment Share on other sites More sharing options...
MarkR Posted January 8, 2010 Share Posted January 8, 2010 Must have been a slip? I thought that... "looks like wheelspin" went through my head. Quote Link to comment Share on other sites More sharing options...
TLicense Posted January 9, 2010 Share Posted January 9, 2010 I was just trying to weigh up in my mind if I thought the HP and torque figures were high or low for this set-up. I've come to the conclusion, that circa 650hp and what is realistically 500ft/lb would kinda be about the middle ground. Anyone else have any thoughts? Quote Link to comment Share on other sites More sharing options...
cowboy bebop Posted January 9, 2010 Share Posted January 9, 2010 Oh yeah, the 1500HP isn't acurate. That's the dyno issue, I think. There's about 100ft'lbs more to be had in the midrange I feel, but still at 19psi it's making very good power. Especially since it's running through a Th400. Quote Link to comment Share on other sites More sharing options...
tony tt Posted January 9, 2010 Share Posted January 9, 2010 WOW What a car outstanding!! Quote Link to comment Share on other sites More sharing options...
EdMorris Posted January 9, 2010 Share Posted January 9, 2010 Impressive stuff. Must be great hooning around in it. Quote Link to comment Share on other sites More sharing options...
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