Fgts Posted October 21, 2018 Share Posted October 21, 2018 http://gmauthority.com/blog/2018/10/next-gen-gm-hd-trucks-to-introduce-new-6-6l-v-8-gasoline-engine/#comment-751944 From what's read 400 hp/400 tq is what's coming from the 6.0 replacement. It's to be offered in the MD/Navistar trucks as well as the HD/Silver-Sierra. Quote Link to comment Share on other sites More sharing options...
fordmantpw Posted October 21, 2018 Share Posted October 21, 2018 That's outmatched by the current 6.2L in the. The new 7.3L should destroy it. Quote Link to comment Share on other sites More sharing options...
Fgts Posted October 21, 2018 Author Share Posted October 21, 2018 (edited) That's outmatched by the current 6.2L in the. The new 7.3L should destroy it. As in how for the 6.2?, in Raptor tune it was 411 hp, in SD form it's 385 hp. The 6.6 is 400hp +, I expect the 7.3 to make more but not that much. Edited October 21, 2018 by Fgts Quote Link to comment Share on other sites More sharing options...
fordmantpw Posted October 21, 2018 Share Posted October 21, 2018 As in how for the 6.2?, in Raptor tune it was 411 hp, in SD form it's 385 hp. The 6.6 is 400hp +, I expect the 7.3 to make more but not that much. The current 6.2L has 385HP/430 ft-lbs. I would trade the 15 HP for 30 ft-lbs all day in a truck. Personally, I expect around 450/500 out of the 7.3. Another 100 ft-lbs (25%) is drastic. Quote Link to comment Share on other sites More sharing options...
twintornados Posted October 22, 2018 Share Posted October 22, 2018 The current 6.2L has 385HP/430 ft-lbs. I would trade the 15 HP for 30 ft-lbs all day in a truck. Personally, I expect around 450/500 out of the 7.3. Another 100 ft-lbs (25%) is drastic. . ...and the 500 ft lbs coming in under 2,000 RPM as well. Quote Link to comment Share on other sites More sharing options...
MY93SHO Posted October 22, 2018 Share Posted October 22, 2018 So Ford and Ram have 7.xx engines coming and GM went with a 6.6L? What happened with the 7.0L.? Same place as the 454 Duramax that gets dredged up every so often? Quote Link to comment Share on other sites More sharing options...
7Mary3 Posted October 22, 2018 Share Posted October 22, 2018 From what I hear, both the 7X and the G.M. 6.6 are going to come in around 400 h.p./450 ft. lbs.. These are truck engines tuned for reliability and low end torque. Not sure exactly what the GM 6.6L is, my hunch is that it will be a tall deck Gen. V LS derivative. Quote Link to comment Share on other sites More sharing options...
jpd80 Posted October 23, 2018 Share Posted October 23, 2018 GM is only looking at replacing the 6.0 in 2500 and 3500 trucks so the 6.6 will probably be perfect with ~400 HP and ~450 lb ft. that should go well against the Ford 6.2's 385 Hp and 430 Lb Ft. In Medium Duty, the 6.8 V10 is rated at 320 HP/ 460 lb ft, in Super duty it was 362 HP / 457 lb ft. So I can see the new Ford 7.3 V8 probably adding about 30Hp and 30 lb ft to both sets of 6.8 figures. Quote Link to comment Share on other sites More sharing options...
RPF Posted October 23, 2018 Share Posted October 23, 2018 I would consider 400/450 in the new 7.X to be a disaster of epic proportions, particularly as it required a new design and a new production line. To be worth the investment, this engine needs to be useable in more than just the E-450 and F-650/750. Which means it needs to be useable in Class 3 F-series and needs significantly more powerful than 400/450 in that application. Equivalent power density to the current 6.2L at 7.3L would be about 455/510. A 7L at that power density would be 435/485. The Boss had that displacement in its initial design and per the engine program's chief engineer, just needed upgraded exhaust valves and manifolds to pass the HDE dyno tests. It would make no sense to design a whole new engine with a significantly lower power density than this when they could just drop the 7L Boss into production on the existing line Quote Link to comment Share on other sites More sharing options...
twintornados Posted October 24, 2018 Share Posted October 24, 2018 I would consider 400/450 in the new 7.X to be a disaster of epic proportions, particularly as it required a new design and a new production line. To be worth the investment, this engine needs to be useable in more than just the E-450 and F-650/750. Which means it needs to be useable in Class 3 F-series and needs significantly more powerful than 400/450 in that application. Equivalent power density to the current 6.2L at 7.3L would be about 455/510. A 7L at that power density would be 435/485. The Boss had that displacement in its initial design and per the engine program's chief engineer, just needed upgraded exhaust valves and manifolds to pass the HDE dyno tests. It would make no sense to design a whole new engine with a significantly lower power density than this when they could just drop the 7L Boss into production on the existing line . I am sure the new 7.X V8 will also end up in the E350/E450/F53/F59 stripped chassis designs. Quote Link to comment Share on other sites More sharing options...
7Mary3 Posted October 24, 2018 Share Posted October 24, 2018 GM is only looking at replacing the 6.0 in 2500 and 3500 trucks so the 6.6 will probably be perfect with ~400 HP and ~450 lb ft. that should go well against the Ford 6.2's 385 Hp and 430 Lb Ft. In Medium Duty, the 6.8 V10 is rated at 320 HP/ 460 lb ft, in Super duty it was 362 HP / 457 lb ft. So I can see the new Ford 7.3 V8 probably adding about 30Hp and 30 lb ft to both sets of 6.8 figures. No, I do not believe GM's new 6.6L will only be in 2500's and 3500's. I hear it's being developed for medium duty and possibly other OEM applications. Quote Link to comment Share on other sites More sharing options...
jpd80 Posted October 24, 2018 Share Posted October 24, 2018 OK,if the new 6.6 V8 is going into Medium Duty, then it will probably fill a similar role as the 6.8 V10 but with more power and efficiency. I dunno, it might be a little light on for capacity in the really big stuff like class 6 and 7 but should be right at home in class 4 and 5 Quote Link to comment Share on other sites More sharing options...
Fgts Posted October 25, 2018 Author Share Posted October 25, 2018 No, I do not believe GM's new 6.6L will only be in 2500's and 3500's. I hear it's being developed for medium duty and possibly other OEM applications. I'd love to see a new, civilian 6.6 Caprice with new styling... Quote Link to comment Share on other sites More sharing options...
Sevensecondsuv Posted October 26, 2018 Share Posted October 26, 2018 (edited) So GM jumped the shark and is bringing us a 400/400 motor that will be out-torqued by.... let's see here: The Ford gen 1 6.2L The Ford gen 2 6.2L The Ford 3v 6.8L The Ford 2v 6.8L (since 1999!!!!) The Ford 7.5L bbf (since 1993!!!!) The Ram 6.4L hemi The Dodge/Jeep 6.1L hemi The GM 7.4L vortec (since 1996!!!!) The GM 8.1L Talk about bringing a knife to a gun fight! This is a rumor that makes no sense at all. Why would GM go through the trouble of raising deck height only to add marginal output to the current, yet ancient, 6.0L (360 hp / 380 ft-lbs)? Also, anyone who believes the 7.x is going to be any less than 450/500 isn't thinking straight. As was already pointed out, the 6.2 already does 385/430. What is all that extra displacement going to do? Heck - the rev-happy tiny little 5L in the mustang makes 420 ft-lbs for pete's sake. The existing V10 could have been updated to make 450/500 without changing much besides the head. It would make zero sense to spend millions on a new engine and production line if it's not going to significantly exceed the capability of every other gas truck engine currently on the market. Edited October 27, 2018 by Sevensecondsuv 2 Quote Link to comment Share on other sites More sharing options...
7Mary3 Posted October 27, 2018 Share Posted October 27, 2018 (edited) Everything I have read about the new GM V-8 so far says 400 H.P., 450 ft. lbs.. Edited October 27, 2018 by 7Mary3 Quote Link to comment Share on other sites More sharing options...
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