here's a dyno sheet as a reference:

 

OK. So tell me how much the LS2 makes on the dyno. I dare say it's a similar number.

 

haha, no way, LS2's are generally in the 33x's for automatics and 34x's for manuals.:

 

Now considering you stated this in another thread;

You're making some pretty bold statements about the performance of two cars that have never raced each other. Yet you also state that you haven't seen enough Challengers to guage them and we know you haven't seen the 2010 Camaro SS run yet. But in your humble opinion I'm sure....

 

It's obvious the challenger = charger = 300c = magnum. there isnt that much to them, it should be pretty obvious for the most part what to expect. its like comparing a firebird and a camaro and expecting a clearcut winner. instead of wadding through the bs and splitting hairs, just call them the same. they are too close to separate to say one dominates over the other.

for the camaro, all we can do is guesstimate based on statistics and other real world data. you can go ahead and call my statements "bold" if you like, but all it is is rational thought.

 

Fair enough. I can only say let's wait for the road tests because the information that I'm seeing, albeit from magazine published figures and dyno pulls, is that the L76 and LS2 are similar in regards to output and virtually no difference in performance down the quarter.

If you look at the HSV VE LS2 performance figures and compare them to some of the Holden L98 (essentially an L76 sans AFM) performance figures, they are literally line ball - quarter mile and terminal speed.

 

I was watching some auto show the other day and a Challenger SRT8 dyno'd at only 358 RWHP. FWIW, the Corvette's LS3 has dyno'd at 387 RWHP in stock applications.

 

LS2 puts a good bit more down to the wheels than a L76 and as far as
1/4 mile performance goes there is a lot more involved than just rwhp,
ie - vehicle weight, gearing, driver, so it's not surprising that 1/4 times
can be very similar. So many just see hp and think that is the be all end all
of a race. Nothing could be further from the truth. Just cause you got more
hp than someone, doesn't mean they won't hand you your ***.

 

Here is one that put down 465 rwhp stock. Dynoed in one of the most reputable shops in the PNW that consistently see's 450 rwhp on stock Z06's. In case anyone notices ignore the AFR numbers. We weren't measuring A/F just power output.

 

They may not be underrated, but they are definitely choked up from the factory. The L76 would be a fun engine to modify - seems they are seeing significant HP gains with minimal modifications.

 

Very nice.

 

Just imagine how much better it would be if it wasn't a CRAP LS7. Damn old school 427's with friggin pushrods. Oh well, at least it has that cool fuel injection system.

 

Mustang dyno, being load based dyno's, aren't directly comparable to a Dynojet. They just have too many variables that can skew the numbers on top of the fact you can make them spit out just about anything. It used to be common knowledge that mustang dyno's showed 20-25% less hp than a dynojet but it seems more and more places actually have them calibrated to show MORE hp than a dynojet nowadays. The numbers from a mustang dyno aren't even comparable to another mustang dyno.

They are the better choice when it comes to real world type tuning, but when comparing hp figures, it just doesn't work.

 

i've seen an automatic LS3 in the 37x's and have also seen other srt8's in the 37x's as well.

The average manual LS3's that I've seen have dyno'ed in the 380-385 rwhp and the automatics in the 375-380 range.

And, btw, I was comparing to the LS3 in the camaro, which is to be making 8-14hp less, so it can be expected for them to make 370-375 rwhp for the manual. We have yet to see a manual SRT8 dyno, not even ONE exist's that is in the hands of an enthusiast, that's how hard their computer has been to crack.

 

Yeah stupid pushrods. I'd rather have a DOHC motor with 4 cams and no pushrods. That's way better tech.