First test of my 408 Stroker

Sounds great. Congrats - it's great when your car is back on the road!

Rocky

Hi Heine,
Congrats! Can't wait to see and hear it live,
Cheers, Tim.

Fantastic Heine, and all done before the winter!

Mark

nice!sound soooooo good! will post fire-up of mine after 3 month rebuild next week.

quote:

Originally posted by danishcarnut:
A Little video (Mobilphone... Sorry) of #2241 at it first testdrive with my rebuild 408 Stroker.

https://www.youtube.com/watch?...j1FipO9pdFmJIqIsleBw

quote:

Originally posted by pantera chris:
nice!sound soooooo good! will post fire-up of mine after 3 month rebuild next week.

I will look forward to that !

Here's a Little test with my Gopro cam (Not the best !!!)

http://youtu.be/5zrbMniXMro

Awesome Heine....awesome..!!

That engine sounds VERY healthy !!!!

I know I am changing the subject. A Little.

What Steering Wheel do you have?

The steeringwheel is a Piloto, purchased at P.I. Motorsports

Sounds and looks great!

Nice! And that Cambria shot with your black car on the hill. Just got back from that great area & restaurant on the hill still closed however.

I was watching the video of your car on the dyno and couldn't figure out why the the hp and tq didn't cross at 5252?

quote:

Originally posted by 8pack:
I was watching the video of your car on the dyno and couldn't figure out why the the hp and tq didn't cross at 5252?

Hhhmmm, Think You lost me there....

It crosses at around 4300 rpm. Why should it be at 5252 ?

Horsepower = torque X rpm / 5252

You can google hp cross tq at 5252 for the longer version but the short version is that it is how the math works out.

Aarrhhhh. Remember that this is European measures. So the torque is measured in nm and not in lbs/ft.
So maybe that's why there is a difference ??

The torque Peaks at 784 nm/ 5112 rpm if You look closely to the Dyno sheet.
784 nm is 578 lbs/ft.

HHhmmmm, Just googled alot of Dyno Sheets. And Your're right. MOST runs, cross at 5252 rpm, but not all. So seems like there is a little confusing about that ?

None of the cars dynoed that day crossed at 5252 rpm. That's a little wierd though.....


CLICK THE LINK

http://www.carnut.dk/rulle-dag-for-drengerove/

quote:

I was watching the video of your car on the dyno and couldn't figure out why the the hp and tq didn't cross at 5252?

I found this confusing as well, but it really isn´t

That sheet has two scales, Hk (or hp) on the left from 0 to 700, and Nm on the right side from 0 to 1210. If you instead would have a single scale showing Hk and Nm from, e g, 0 to 1210, the lines would cross at 7024 rpm. Why 7024?
Because 1 ft lbs = 1.34 Nm and 7024/5252 = 1.34

So, in this case with Nm, the lines would never cross, because the engine doesn´t rev that high.

Makes sense?

I didn't even notice it till I saw 618hp. I have look at a lot of dyno charts but I can't remember ever seeing a streetable 408 get even close to that number. Don't take it the wrong way, your car sounds great but that would be a 700+hp 408 @5800rpm. I am guessing the person running the dyno turned in some correction or something.

quote:

Originally posted by 8pack:
I didn't even notice it till I saw 618hp. I have look at a lot of dyno charts but I can't remember ever seeing a streetable 408 get even close to that number. Don't take it the wrong way, your car sounds great but that would be a 700+hp 408 @5800rpm. I am guessing the person running the dyno turned in some correction or something.

The 618HP @5800 is not rearwheel horse power, but is calculated at the crank. The Dyno makes alot of calculations on 3-4 testruns, where it measures the loss in transmission etc.
The Guys who runs the Dyno, says it's correct within 2-3%

I saw a similar engine, with the exact same parts, build by Hot Rod Magazine, make 621 HP in a Dyno.

Mike Drew build an engine exact like mine, but with another cam. It made 564 HP @5800

But You're right.... 618 HP is alot in a 408 Stroker. Don't know if it's correct, but it pulls HARD, and that's good enough for me

quote:

Originally posted by danishcarnut:


The 618HP @5800 is not rearwheel horse power, but is calculated at the crank.

Now I'm up to speed I am getting ready to dyno my Pantera in a couple weeks that's why I have been looking around to see what other people are putting down. I have a little more motor than most but I don't think it will put down over 600hp to the wheels.

I have a professionally built 408 with a dyno sheet (on crank) of 593 HP. So I was a bit sceptical about a "homebuild" and not adjusted engine of same size having considerably more power. But then somebody sold an engine just like mine from MME with 680 HP. So now I'm puzzled. Where did that extra 87 HP come from?! 593 is already a lot from 408 naturally aspirated cubes...

Is this like selling elastic band by the yard?

I don't get Your point here Mikael.
So You're saying that because my engine is partically put together in my garage will have less power than a similar engine put together in a professional shop ?
My engine components where handpicked by Dan Jones and others, and all the machine work done professionell by local experts, who also build dragracing engines.

The people at the Dyno is also very professionels with years of experience and a good reputation. So I have no reason to doubt their result.
We adjusted the engine at the Dyno, but will re-adjust this spring after I have installed an AFR gauge so we can follow the numbers more precise.

Heine, re-read my posting maybe? My point is that people who make a living on this quotes HP numbers to us that perhaps/perhaps not are a bit optimistic?

I don't know if your engine has more power than mine, I'll be willing to test that on the street any time. But if I compare our 408s I'd doubt yours would be considerably more powerful. We all know Dan Jones' skills, he's also helped me so that's not in question. But if I compare the world's claimed leading Cleveland builder, winner of Jeg's engine Masters more than once, doing a complete engine dyno and adjusting carb and ignition, if I compare that to Danish engine builders, dragracers or not, I know where I'd put my money. And remember your engine has not been dynoed, your car has, and then the nice guy at the dyno adjusts a lot of things. I'd be careful on numbers like that. It may be what the American's call a Happy Dyno. All customers leave happy.
But that's just me.

I'm sure we get an opportunity to settle this the right way some day, on the street

quote:

We adjusted the engine at the Dyno, but will re-adjust this spring after I have installed an AFR gauge so we can follow the numbers more precise.

You don't use an AFR to optimize power on a dyno, it's one of the tools you have, but most is trial and error with jets and timing curves

quote:

So You're saying that because my engine is partically put together in my garage will have less power than a similar engine put together in a professional shop ?

Of course. Did you port all the parts, both as individual components, and also e.g. the flow from intake to heads (and gaskets)? Everything counts

quote:

But if I compare our 408s I'd doubt yours would be considerably more powerful.

Mikael, maybe your pro engine builder made a mistake in your engine since it develops so Little HP compared to the other 408 builds here on the threads

Maybe he forgot to portmatch the intake gaskets ??

Kidding aside, I don't think you can compare your engine to Heines, he has different heads, more compression, different cam etc., etc. .... and what's the point?

Kristian, you know the guy with the BIGGER ... engine

@Mikael

Yes, everything have been matched. Not that it really needed it, because intake and heads are TFS. Trimming was minimal. They almost matched perfectly directly from the box.

The AFR Meter will tell me if it run rich or lean, and in what rpm range I may have a problem. And with that knowlegde I can finetune with other jets. Like You say: Every Little thing counts..... An engine running rich will cause a loss in power, so ofcause it will help to lean it out, if that's the case.

Not trying to start a pissing contest or whatever", 'cause I really don't care. Maybe the Dyno is a Little on the "Happy Side"....??? I don't know, but like I said before, I doubt it. All I know is that the car has enough power and torque to make my heart skip a beat, and scare the sh** outta me. And that's good enough for me

@Kristian: Haha, BIGGER engine........ Not for long. My Engine-Guy and I talked about making a HUGE Cummings Diesel for the Pantera. That will be fun

How big is big? I have was thinking about starting a new post to see how big is big and how much hp.

quote:

Originally posted by Piney:


I found this confusing as well, but it really isn´t


So, in this case with Nm, the lines would never cross, because the engine doesn´t rev that high.

Makes sense?

Makes sense for me know. Thanks for the explanation

quote:

Originally posted by 8pack:
How big is big? I have was thinking about starting a new post to see how big is big and how much hp.

Yeah, let's see what's out there.

BTW: Any leads for an adapterplate, Cummings-ZF Transaxle ???

quote:

Originally posted by danishcarnut:

quote:

Originally posted by 8pack:
How big is big? I have was thinking about starting a new post to see how big is big and how much hp.

Yeah, let's see what's out there.

I don't have anything big but it is something north of 450ci.