Does this software have the LT-1 components? Mainly, the intake, throttle body, and injectors? I don't want to by if it's only got carburetors.

Thanks,
Kerry

 

it's not accurate on TPI, LT1 or LS1 cars by any means, it does kind of give you an idea what makes more or less HP but it in no way will come close to a chassis or engine dyno.

 

I've heard the problem with this program is that it doesn't do a good job on dual pattern cams (when the duration of the exhaust/intake lobes isn't the same). I have never been able to get it to model the stock LT1/4 torque curve properly.

Eric

 

go to http://www.performancetrends.com test their program "engine analyzer v3" :chevy

 

If you read their help info they point out that you cannot use "TPI" intake to model LT1 & LS1 intakes with their shorter runners. You need to select an intake model that has similar dynamics.

Once you have a torque curve I strongly suggest you get their Drag2000 simulation software. Once you tune the traction coeficient to duplicate your time slips you can then change parameters to optomize your track performance. I recently had tranny parameters setup based on simulation data and am VERY pleased with the results.

There was a write up in a car magazine earlier this year on these two simulations that gave them good reviews though pointed out that some experimentations is required to get the most out of either.

So, for like $50 for either, I have both on my PC.

 

I have tried desktop dyno and the engine analyzer V3. I have never been able to get the hp close to real world results using engine anaylzer. I have had better luck with desktop dyno in the 3000+ rpm range when I compared it to real results posted on the forum. It seems to show more torque on the lowend than the real thing.

Desktop dyno will allow you to model just about any engine. You need to know flow rates of the heads and throttle body size. Use the tunnel ram intake for the LT1 intake. Injector size and fuel air ratio are not part of the program. I think it uses a fixed fuel to air ratio. The exhuast system is guess. I use small tube headers with muffles for the vette LT1. The hp with high performance manifolds was too low. DD handle cams correctly. It does not have a way to enter rocker arm ratio. You have to use full lift and the effective duration at .050 from the rocker arms. Rocker arms larger than 1.5:1 will increase the duration @ .050 slightly.

You probably won't be able to duplicate stock performance values with the desktop dyno or any other program. The factory hp ratings are 'SAE net' which includes all accessories operating. I think this essentially means hp when its mounted in the car. Desktop dyno is more like a simulation of a standard dyno run so the actual hp values will be higher.

I remember seeing an article when the C4 LT1 motor came out that compared it to the 370 hp LT1 made in the early 70s. The new LT1 made more HP than the original LT1 on the dyno but as you know the 70 LT1 was rated at 370.