dynoed the twin turbo 496 yesterday

Louich · 03-05-2009, 08:39:27 PM

but due to it getting late and not wanting to wake up the neighbors it only did a 3000 to 4000 rpm pull...and so far.........WOW!!!!!!!!! gotta love turbo's

before turbo's, with crack in number 8 spark plug and some upper rpm missfiring

and with these on it

74RAT · 03-05-2009, 08:54:35 PM

something doesn't jive with the torque and hp crossing below 4800. i'd ask them about that. should be @5252rpms. otherwise,, great numbers with those twins if the math jives.
andy

Louich · 03-05-2009, 09:06:29 PM

Quote:

Originally Posted by 74RAT

something doesn't jive with the torque and hp crossing below 4800. i'd ask them about that. should be @5252rpms. otherwise,, great numbers with those twins if the math jives.
andy

i run an overdrive and lockup convertor and put a lot of miles on it....and with that much torque i don't run a lot of gear so this works good at low rpm...the turbo's are small for the engine but for what its built for it will work good. dude at the dyno has a 1300 hp twin turbo in his 55 wagon and its square port heads bigger cam and bigger turbos and everything happens later on his.

ZS10 · 03-05-2009, 09:48:42 PM

Quote:

Originally Posted by 74RAT

something doesn't jive with the torque and hp crossing below 4800. i'd ask them about that. should be @5252rpms. otherwise,, great numbers with those twins if the math jives.
andy

I saw that Andy, and agree. Some kinda rear wheel dyno with some funky software...???

Louich · 03-05-2009, 09:52:40 PM

http://www.dtsdyno.com/products/powermark.htm

this is what its done on...since my last set of slicks got shredded and shot out of the building on little chunks i won't wheel dyno my big blocks.

ZS10 · 03-05-2009, 10:05:49 PM

That's the exact same model my engine was on a few years ago...supposed to be a very good machine.
But still, tq and hp are supposed to cross at 5250, always. Maybe not if you chop the throttle mid pull or something...?

And ya, I wouldn't wheel dyno on slicks either...

Louich · 03-05-2009, 10:07:39 PM

did yours cross in the proper spot?

Louich · 03-05-2009, 10:20:58 PM

this is all i found to explain it so far

Crossing over @ 5252 only happens on a graph that uses the same # scale for both torque and hp

ZS10 · 03-05-2009, 11:02:58 PM

Ahhh yes, I see... my graphs show a single scale for hp and tq.... yours has two scales on the right side. That's why we're confused... so where the lines cross at ~3860rpm on the turbo pull it made around 1200lbs tq, and 880 hp, if I read it right.

!!!

That's too much power, you're gonna have to turn it down some or the sb guys will start to whimper.

Louich · 03-05-2009, 11:05:13 PM

it went 1233 ft lbs at 3600 and was at 912hp by 4000 rpm...and climbing....

is this gonna be hard on my tires????

Greezer · 03-05-2009, 11:25:40 PM

hey punk

Louich · 03-05-2009, 11:28:51 PM

wall mart specials

then it won't cost as much as i spin em off

ProStreet383 · 03-05-2009, 11:36:25 PM

Quote:

Originally Posted by Greezer

Um, got a guy runnin TT BBC, dynoed last year made 1450RWHP, and would spin the slicks all the way down the track. Very hard to get to hook. A soft launch might get a hook, but on a 10.5 tire, I don't think so. What tires you plan on using?

What size tire do you think the 10.5 outlaw guys pushing 3000hp are running? They are 10.5W (Gay I know) and are 12.1" wide if I am not mistaken. So yeah it can be done if you have enough money.

My cousins 496 made over 900hp N/A on the engine dyno. He is now feeding a 2 stage fogger system of 500hp. He runs the 10.5 outlaw class for fun. Needless to say the nova runs great but not with the big dogs that have $200K cars.