Need4Camaro

*reads Mods list*

But arn't you just a teeny tiny bit biased?

SSCamaro

I agree, but here is how I see it.

LS1 Pro's
1) Fast outta the box
2) very much dependable (unlike the opti crap stuff on the LT1
3) Has the interior I am used to and like so much more over the 96 and down interiors

LS1 Con's
1) Power is up top where i do not use it on the street much
2) does not have the front nose I like (a biggie for me)
3) Thats all




LT1 Pro's
1) Lots of low end 0-posted speed limit fun (very important for me)
2) see above
3) has the front end/nose I like

LT1 Con's
1) much less power than the LS1
2) optipasark

I was thinking that if I could get a LS1 and give her a shot in the low end power while keeping my top end and having dependability, that would be the ticket, hense the title of this thread.

So, it was said that LT1's have a 3" runner? Where can I find a 3" runer manifold for the LS1, lol?

izzyz28

Ummmmm, you got that backwards there. Shorter = top end. Take a look at the long runners on the L98....tons of low-end. Think about what the OEM's do with the dual-runner intake. Long runners for low-end, and a switch to short runners(or a "bypass") as RPM increases. Long runners build velocity and low-speed torque, while short runners allow better cylinder filling at high RPM. I'm actually surprised the LT-1 does as well as it does in spite of its short runners.

SSCamaro

Oh, hmmm, well, I was just useing what someone posted here, whoops

SSCamaro

been thinking about this thread all day, man thats gotta burn ha ha ha ha ha!!

Bayer-Z28

Serious question about that. Where do the LS1 intake runners place? THey're long. But how do they compare to the Long runner velocity and top end power?

Looking at my dyno sheet, at the start of the pull, 2400 rpm I have 315 ftlbs RWTQ. It peaks at 4000 rpm (346.5) and maintains that till about 5100, then it starts to drop off.

izzyz28

I'm not sure how long they are exactly, but I bet one of the guys who hang out in Advanced tech would know. I highly doubt they are ridiculously long, and I have no doubt they were engineered to work in a very broad RPM range. Though they are long, they seem to still flow well at higher RPM, which is where the heads really shine compared to the LT1. I'm actually quite surprised the LT1 has such short runners on it, but it seems to work well. Still, 315 lf-ft at 2400 RPM is nothing to sneeze at, and I still hold firm in my belief that both LT1 and LS1 engines produce very similar low-RPM torque while the LS1 walks away on the top-end.

mpayne

These are all approx. numbers because I can't remember the exact numbers. The L98 runners are 21-24 inches, LT1 is 3 inches, LS1 is 15-17 inches.

The L98 has a high peak torque in a narrow rpm band because the intake and camshaft are designed to take advantage of resonant tuning or something like that. It happens when the first intake pulse bounces off the back of the intake valve and reverses in the intake stream. The second pulse then comes through and joins the first pulse to travel back through the intake into the combustion chamber at a very high velocity. It is like a supercharging effect because of the inertia of the second pulse joining the first one.

The LS1 doesn't take advantage of any inertial phenomenon but has a medium length runner that is long enough to create good velocity for a broad torque curve, yet not too long that it can't breathe up high.

JakeRobb

I think he is.

kick Z tail out

I'm not biased at all.

Need4Camaro

Atleast you have a good sense of humor...