d-bo

iTrader: (14)

Generally speaking , is it 1mph increase in 1/8th usually 1 mph increase in 1/4 ?
So If I ran 100 in 1/8 before and 127 in 1/4 and pick up 10mph in 1/8 I can expect about 137 mph 1/4 as done here ?

tscompusa

iTrader: (31)

no. gearing plays a huge roll in what 1/8 to 1/4 is going to be. gearing, tire size, turbo setup, and so forth.

KameloT

Dynojet in Virtual Dyno is wrong... Mustang is more real.

In Dynojet i have about 650whp, it is not a true... In Mustang i have evout 550-560 .

But you time and speed is near at 560whp, i have the same.

Where is true in Virtual Dyno?))

tscompusa

iTrader: (31)

In this particular cars case it is not reading correct at all. The reason for this is because we were using 1byte RPM which stops logging RPM at 7968RPM. So the guy here was reving his car out to around 9300RPM on the pulls, and we only see in the graph I shared up until 7968RPM. There's more timing from 8K to 9K so you wont see the whole picture.

So because of that the numbers were quite a bit lower then what the vehicle was actually making. The trap speed at the track confirmed that.

A 138mph trap with street tires and a full weight evo is an easy 650-700whp dynojet evo on the transmission he was using. Just a regular evo 8 5spd.

The car is in the process of being disassembled now, I gave the owner the option to drive the engine down to me to redo it, or his machine shop is going to do it no charge. They offered to do it at no charge due to an issue they think they made a mistake on when building the engine based on some reviewing on tear down.

When its back i will update the thread further on what happens with it. I think the owner is very capable of putting the car into the 9's even full weight. Hes a good consistent driver.

Other then that, VD reads pretty accurately. On average a little lower then it should, but its pretty close normally, unless there is a RPM cut like in this particular cars case.

Also 625+ bolts will be going in this time as well for piece of mind when reving this high.

KameloT

Ok, and what do you think about Mustang in VD ?

tscompusa

iTrader: (31)

Mustang VD is identical to dynojet VD minus 13% shaved off the dynojet number.

So you can use that and be very close to a Mustang that reads properly as well.

The only reason I use dynojet mode is because most people want to see that number instead.

I never had anyone really ask me to post a mustang # before. But I could start sharing both the dynojet & mustang # if it was requested.

But just take the number in vd and x 0.13 = and get that number, and subtract it from the dynojet # for your mustang #.

For example 396 dynojet x .013 = 51.48

396 - 51.48 = 344.52whp in mustang

ExViTermini

iTrader: (25)

Or make life simpler and just multiply by .87

Did they say what the mistake was they think they made?

tscompusa

iTrader: (31)

I didn't even think about that. That is a much easier way to do it.

No they didn't. The car needs a new rod so far. I don't know if the crank is good or not. Based on the rod cap turning purple, id say the crank is no good.

tscompusa

iTrader: (31)

its time to pump some more positivity into this thread. Nate went to the track over the weekend after rebuilding the engine.

Just on 93oct, he managed a 10.5 @ 131! I think thats a great time slip for just 93octane gas!

The old engine once torn down had a lot of mistakes, that are now corrected.

Heres a picture of the time slip:

mitsubeastlee

iTrader: (3)

wow! awesome time for such little power.

batty200

iTrader: (3)

That's awesome! How much boost on 93?

tscompusa

iTrader: (31)

Boost was about 29psi throughout the logs from the map sensor on the most recent log.