apathy

Recently came into contact with a dude with an LS1 that made some claims that I found rather hard to swallow, just wanting general opinions here from the people who know. The claim started from a discussion about how much power stock bottom ends can hold on various cars.

First claim:

Immediately called BS due to 580/604 on a 100 shot and the slow trap speed for that much horsepower.

Second claim:

Dyno charts:

http://terminalapathy.com/images/dyno1.jpg
http://terminalapathy.com/images/dyno2.jpg

Timeslip:

http://terminalapathy.com/images/slip.jpg

Interested as to what ya'll think. All horsepower/torque claims are at the wheels, not flywheel.

Mods feel free to move to a more appropriate forum, I couldn't figure out a good place for it.

Edit: It should be noted that I am not doubting the veracity of the timeslip or the dynosheets.

Edit x 2: The timeslip and claims are for a 1/8th mile track. To avoid any confusion.

blkZ28spt

That is a low mph for a 6.9, but it's possible. You could easily make that much power on a stock bottom end. For awhile........

I don't see how to read that slip, but if it's saying the 60' was 1.46 I could believe 6.9 @ 101 in the 1/8.

Edit: Those green dyno curves, which I assume were ont he bottle, are all over the place. And it only spiked up for a short while. Was that tuned? I wouldn't be surprised if he used the untuned run, or at least not the final product, in order to get those high peaks. THe under curve certainly doesn't match the peaks though.

apathy

Said person claims that it is not a torque spike. The car is tuned on this run, and ran the timeslip on this tune.

I said it is a torque spike, which was obvious to me, and he is actually making about 520-530, which makes much more sense for the mods, and for the mph.

Whether or not the bottom end would hold up is irrelevant for this post though.

777

iTrader: (21)

first claim is bs because he doesn't mention that it has a cam....second one is believable and i don't find any other faults in his story besides the dyno graph that looks terrible...obviously untuned...

as far as bottom end...it will hold up well for awhile...but i'd say he is starting to push the limits...

apathy

I haven't had a person yet claim that a 101 mph 1/8th mile trap in a 580rwhp LS1 is accurate. Are you the first?

Perhaps I am being unclear. The original discussion started, as I previously said, in terms of how much a stock bottom end of various engines will hold. This person claims to have a 580rwhp stock bottom end LS1. I disagree with that claim, because an actual 580rwhp LS1 will trap much higher than that.

If he spiked 1000rwhp, it would not matter in the sense that we were talking about. Does that make sense? To claim that a stock bottom end LS1 is making 1000rwhp and trapping 101mph in the 1/8th mile?

777

iTrader: (21)

yes...i think it is believable...although not probable it is possible...

777

iTrader: (21)

well here is a member on this site...this goes to show you that anything is possible

specs
https://ls1tech.com/forums/etdb_vehicle.php?id=575

timeslip

https://ls1tech.com/forums/etdb_slip.php?id=593

last car on this page

https://ls1tech.com/forums/etdb.php?...c&pp=25&page=3

blkZ28spt

Well, it looks like the only is in the horsepower claims. He can wow people (and himself) all he wants with his awsome "peak numbers" but the graph shows a different story. Apparently the track does too. Then again a 6.9 1/8 isn't exactly slow.

apathy

That is an accurate MPH though, for that cars race weight (3850) and the horsepower claimed (assuming it is at the flywheel as listed, and not at the wheels).

apathy

Definitely, nobody was arguing that he was running slow. Cutting a 1.4-5 60' too.

The trap speed typically does not lie though, since it is basically just math of power vs. weight.

I appreciate everyone's input, was just wanting a few opinions on here. Thanks.