GM Reveals Small-Block V-8 with Direct Injection - wardsauto.com

[BeermanSS]

yeah, I bet you could get over 400 hp out of a 5 litre DI V8. Lexus gets 416 out of their 5 litre in the ISF i think. Getting back to the 350 chevy would be cool 5.7 litre SIDI VVT with 450 hp and 450 ft-lbs and get 30 MPGs or so. That would be NICE

[Kyle2k]

Originally Posted by DGthe3

Yes, but engines can't keep getting bigger. I'd be fine if they dropped by 5-10%.

Oh for sure, I'd just like to see some DI LS3's or LS7's for that matter.

[DGthe3]

Originally Posted by BeermanSS

yeah, I bet you could get over 400 hp out of a 5 litre DI V8. Lexus gets 416 out of their 5 litre in the ISF i think. Getting back to the 350 chevy would be cool 5.7 litre SIDI VVT with 450 hp and 450 ft-lbs and get 30 MPGs or so. That would be NICE

But that 5.0 only makes 350 ft lbs, which is a pretty big drop from the LS3. I agree with you on the 5.7/350 however ...

Originally Posted by Kyle2k

Oh for sure, I'd just like to see some DI LS3's or LS7's for that matter.

that would be pretty cool too. ~500 hp LS3 @ 26-27 mpg, ~600 hp LS7 @ 25 mpg. I'm not sure what would be better. A 30 mpg V8 or an insanely powerful one.

[edbrick]

30 mpg's should be the sweet spot. You cant ask for better than that. After the first design of this engine series comes out i'm sure hp would increase from there as they improve the design.

[CamaroSpike23]

Originally Posted by Tal

Wondering when we'll hear news about this again. GM is building quite a variety of direct injection engines with the four cylinder's updated via the 2.0T + 2.4 along with the V6's updated with 3.0 and 3.6 blocks. It seems to me that this is the time for some DI V8 lovin!

it is time.... for us. but they are probably trying to fine tune everything before throwing a DI v8 into a car (which takes time and testing before launch anyway)

Originally Posted by phatman

- Z28 -
There I said it ! I went there ! Got here - an nooooone else is here - but I don't care if I'm here all a-lone...

ur a day late and a dollar short.... I've been saying it for a while now. lol

Originally Posted by edbrick

I just wonder. At one time Fbodfather said something along the lines of forget what you know about currently available engines. I think new engines were put on hold but I wouldnt be surprised if in a year or two we get a new direct injected V8 and of course this would all be top secret because if it got out most would wait for the new engine. I might be dreaming but hey I can dream Right

that he did say.

Originally Posted by Kyle2k

It would be nice- but I have a feeling a displacement drop would accompany the direct injection.

that was more towards what Fbod was getting at for future engines

Originally Posted by DGthe3

But that 5.0 only makes 350 ft lbs, which is a pretty big drop from the LS3. I agree with you on the 5.7/350 however ...

werd. hp sells cars, torque wins races. some people only care about hp numbers but dont care that they arent getting those numbers till redline. its nice to rev, its nicer to move.

that would be pretty cool too. ~500 hp LS3 @ 26-27 mpg, ~600 hp LS7 @ 25 mpg. I'm not sure what would be better. A 30 mpg V8 or an insanely powerful one.

why not both? DI v8 pushing near 500 hp and 30+ mpg

Originally Posted by edbrick

30 mpg's should be the sweet spot. You cant ask for better than that. After the first design of this engine series comes out i'm sure hp would increase from there as they improve the design.

35 should be the sweet spot. no reason to barely bump the bar up, we should be achieving great power and great (not good) mpg.

[JJ#48Racing]

I think 30mpg is a stretch, especially while keeping the same power level. The 3.6 V6 isn't even quite there mpg wise.

[DGthe3]

Originally Posted by CamaroSpike23

it is time.... for us. but they are probably trying to fine tune everything before throwing a DI v8 into a car (which takes time and testing before launch anyway)



ur a day late and a dollar short.... I've been saying it for a while now. lol



that he did say.


that was more towards what Fbod was getting at for future engines



why not both? DI v8 pushing near 500 hp and 30+ mpg


35 should be the sweet spot. no reason to barely bump the bar up, we should be achieving great power and great (not good) mpg.

Direct injection is good, but its not magic

[Kyle2k]

Originally Posted by DGthe3

Direct injection is good, but its not magic

Yeah it is, duh.

[Tal]

Gotta agree, I'm looking forward to a DI V8 but if you are expecting more than an extra 1-2 mpg I think there's a very good chance you'll be disapointed.

[edbrick]

Originally Posted by Tal

Gotta agree, I'm looking forward to a DI V8 but if you are expecting more than an extra 1-2 mpg I think there's a very good chance you'll be disapointed.

One to two miles per gallon are not a big deal lets hope it comes with a significant hp increase like the article states. Cleaner emissions on start up was another plus but not a big one for me. So I guess the only real big upside would be more power. Okay Ill take it.

[DGthe3]

Direct injection increases the efficiency of the process. This can be expressed in 2 ways: increasing power or increasing fuel economy. Its always a compromise, I'm sure the V6 could have been 30 mpg if they cut the power back a bit. I think GM will work towards improving fuel economy of the V8's more than power. In the grand scheme of things, 500 hp is getting excessive for low cost cars, particularly when fuel economy is becoming more and more important than raw power.

[camaro5]

Originally Posted by Kyle2k

Oh for sure, I'd just like to see some DI LS3's or LS7's for that matter.

GM has said the LS series engine is done.

The next V8, will start a new series, no doubt with DI.

[HotWire]

lol my redline with the 2.0 DI Turbo don’t get 30mpg. So where does a v8 fit in at over 30mpg? Not gonna happen for a while. Heck most the time if you get the auto camaro u will be cruising with only 4 cylinders... And well still not reaching 30mpg. The next generation of cars will of course be the DI route but with DI will come all the stinking nanny's that we currently have on the Kappa Platform. If they did do a v8 DI it will more than likely shrink in size to a much smaller v8... I’d say lower than 5.7 mark. But these engines can put nice HP out for their displacement. Of course mine is turbo'd but its over 300hp with only mod being turbo upgrade kit from gm.

[Tal]

Originally Posted by edbrick

One to two miles per gallon are not a big deal lets hope it comes with a significant hp increase like the article states. Cleaner emissions on start up was another plus but not a big one for me. So I guess the only real big upside would be more power. Okay Ill take it.

It's not revolutionary but it's good and may be more important than you expect when considering CAFE. Beyond pure mpg's DI will allow some high compression with regular octane though, which would save something like another mpg in costs (or more if your premium fuel is overpriced) even if it doesn't show on the sticker.

As for the Sky RL and Solstice GXP, GM could definately get them up to 30+ highway mpg's with a six speed and possibly a few other tweaks, but costs would increase a bit and a little performance might be sacrificed. It still shows that a DI V8 isn't a magic bullet for 30 highway, but I would have said the 3.6 V6 rated at 29 also showed that.