04-20-2012, 03:00 PM | #113 | ||
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You'd be spending a lot more money on a Boss 302 crate motor than an LS3. Crate Boss motor is $11,000 and weighs 444lbs. http://www.fordracingpartsdirect.com...-6007-m50b.htm Crate LS3 is $6,300 and weighs 415lbs. http://www.race-mart.com/GM_Performa...-19201992.html The LS3 is smaller, lighter, simpler, and just as reliable. You lose 14hp. BFD. Make that back with a set of headers anyways. Quote:
Is the GT500's torque curve noticeably flatter than that? Besides, that's all academic because I doubt those motors will fit height wise, unless you cut the hood. I don't think any hood would fit. And I don't know where you got this 8000+ rpm redline malarky, but the Boss 302 redlines at 7500. I've hit it.
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04-20-2012, 03:23 PM | #114 |
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Damn a lot of you guys want monster powered FRS/BRZ? And all I wanted was about 25hp/35tq extra over the stock engine. Lol!!
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04-20-2012, 09:48 PM | #115 | |||
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Even with the LS3 being the power house that is, my choice of n/a V8 engines for this car would rank in this order; 1. Boss 302 444 hp 380 lb.-ft 2. "Base" Coyote 5.0 420 hp 390 lb.-ft 3. 2UR-GSE 5.0 liter V8 (from the IS F) 416 hp 371 lb.ft 4. The 4.0 liter V8 from the BMW M3 414 hp 295 lb.-ft 5. LS3 6.2 liter 425 hp 425 lb.-ft 6. the rest lol Quote:
I like the boss because it has the best characteristics of both a big V8 when you are on it and a Camry V6 when you are just sitting at idle or putting around town. Not to mention the difference in overall efficiency between it and a simple pushrod V8. Also if you do a little looking you can find a Boss 302 crate engine for closer to $8500 that was just the first link I happened to click that had a good pic lol Quote:
And honestly I really don't know if the new 5.8 liter in the 2013 shelby will truly be better than the LS9. More powerful stock; yes. Will it be as durable and so forth.. hard to say. The LS9 is one hell of a motor (to say the least!), and it is already proven in the real world. Time will tell I guess. I did read that the new Shelby 5.8 had a flatter torque curve than the LS9 but my guess is that if that is true the difference will be virtually imperceptible. Oops you are right. For some reason I thought it was a lot more than my car (2011 Mustang GT with the Coyote). My bad on that one. |
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04-20-2012, 11:05 PM | #116 |
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I still think the 2GRFSE is the perfect match.
But I want to give the FA20 a shot with a Rotrex. |
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04-20-2012, 11:21 PM | #117 |
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04-20-2012, 11:28 PM | #118 | |
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I was just saying if i were to do a swap i'd swap in a motor that was NOT a 2JZ, Honda or LS motor. |
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04-21-2012, 12:33 AM | #119 | |
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04-21-2012, 01:01 AM | #120 |
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04-21-2012, 02:31 AM | #121 | |
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In contrast, GMPP 19258770 Crate Engines from Pace Performance, RaceMart, Summit, Superior Chevrolet, and CityCrateMotors are anywhere from $6,100-$6,700. I don't know where you keep bringing this reliability issue up from. I have been arms deep in my fair share of LS motors and I know a lot of road race mostly stock LS3 cars. The only ones that break are the ones with R-Comps in sustained high G turns (1.2G+) because of oil starvation. Solution is to add a real dry sump. Use the money you save against the price of a Boss motor. I don't know where you heard stories of these stock LS3 cars that are blowing up left and right though. On the power issue... Bone Stock LS3 High altitude (Colorado) stock LS3 in a Camaro. Bone Stock Boss 302 (upper curve is with Steeda CAI and tune) And another one (upper numbers are with Kooks LTs, Kooks exhaust, and a tune) Really, one of those engines is crap below peak rpm? Both torque curves are nice and flat. The Boss motor actually sacrifices approx 30lbs/ft for about 10hp. You make up for that by spinning the extra 1000rpm. Result? Stock Coyotes(in any form) and stock LS3s have the exact same driving manners around town. They also both idle smooth under 1000rpm, will cruise on the highway at 80 at 2k (or 55 at 1500), and will last, with spirited driving but regular maintenance, to 150k+ miles. Again, tell me stories about how stock LS3 cars are idling like shit and breaking up under load. I'm starting to think you don't know much about LS motors beyond what you hear from Ford guys.
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04-21-2012, 05:52 AM | #122 |
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Easy killer, I don't want to turn this into a ford vs chevy debate. I never said LS motors are blowing up left and right. LS motors are ALL great, particulary the LS7 and LS3 (in my opinion) its just not what I would choose for this application. I like the Boss motor even more, and would rather pay $11,000 for it than have an LS3. For this specific project. You are just going to have to live with that lol. Then again I would also MUCH rather haven LS9 than a Boss 302 engine in this car, and I would MUCH MUCH rather have a brand spanking new Corvette ZO6 than an FT86 with ANY motor lol. Hell I'd take a 500 hp Z06 over a 650 hp GT500
I know the LS3 rocks. I just like the Boss even more. OK????? |
04-21-2012, 08:19 AM | #123 |
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The Ford engine will have a much higher c.g., you know. Not likely to fit, anyway...
But anyway, the problem with the FR-S/BRZ platform is that even with a very short 2.0 flat-4, the weight distribution is 53/47 with two occupants and a full tank. It'll be 55/45 with a driver and half a tank. Just about any engine swap is going to move the c.g. forward a fair amount, not so good for putting down serious power... |
04-21-2012, 08:52 AM | #124 | |
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04-21-2012, 09:57 AM | #125 | |
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BTW, I <3 ur car. Srsly. I test drove a 2011 GT and my buddy's Boss... and was about 3 seconds away from being a brand traitor. But I stick with what I know. And I know my way in and out of an LS and a T56/TR6060.
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04-21-2012, 10:42 AM | #126 |
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With the reliability issue what I was really alluding to is durability under abuse, and not for drag racing I meant continuous lapping at the track. A stock LS3 or a stock 'base' Coyote 5.0 will theoretically break long before the stock Boss motor under racing conditions. Sure you could build an LS3 up to be as tough as the Boss motor and even more powerful if you wanted, and people do just that all the time, but the Boss motor is track ready as is, with a warranty.
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