New Street Truck

08BIGRIG · Sep 18, 2012

Craig have you guys Dyno tested your manifolds? Just curious.

Craig@MFI · Sep 18, 2012

08BIGRIG said:
Craig have you guys Dyno tested your manifolds? Just curious.

I've tested them on my single kits when I first made them on my truck and single kits
We did have them flow tested and flowed 15% over stock

Pizza pig · Sep 18, 2012

how different are craigs than black widows then? dont much this thread up!

Dzchey21 · Sep 18, 2012

08BIGRIG said:
Craig have you guys Dyno tested your manifolds? Just curious.

I was going to lol

kevin · Sep 18, 2012

Craig@MPD said:
Maybe Dozer will give you a set of his epic log style manifolds......

I bet His work just as good as the ones you "gave" me

Breaking Habits · Sep 18, 2012

kevin said:
I bet His work just as good as the ones you "gave" me

?

Sent from somewhere away from my desk using magic.

kevin · Sep 18, 2012

Sorry no more derail its not important

Jhaddox · Sep 18, 2012

bigrpowr said:
Just a heads up , did a before and after of steed speed manifolds, the truck went from 743 to 672 ... Huge loss and spoolup as well as back pressure got worse. They will be coming off immediately. Graph to follow when I get to a computer.

Wow that blows...really hoping I have different results with the single

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dstryr · Sep 18, 2012

lol all that hype... We need an update from Leen on this... as far as I know he is still cutting them on his horizontal...

kevin · Sep 18, 2012

Craig@MPD said:
I've tested them on my single kits when I first made them on my truck and single kits
We did have them flow tested and flowed 15% over stock

15% over stock 6.4 manifolds or 6.0s? just curious

08BIGRIG · Sep 19, 2012

When you going to put Craig's on and are you going to Dyno again afterwards?

Wayne · Sep 19, 2012

If I remember correctly, some tuning improvements have been made, and the wastefate dialed in to get the truck back up over 700, but that doesn't take away from the apples to apples comparison of the two types of manifolds.

White_monster · Sep 19, 2012

So it was thought you could just bolt the manifolds and up pipes on and not change the gate tuning? Just trying to understand your post Wayne.

SEABEE08FX4 · Sep 19, 2012

so with the 6.0 mani' your ran a different tune on the dyno than the run with the steed speed ones ? Maybe I didn't read that right but sounded like you said the only other change was the tune.

Dzchey21 · Sep 19, 2012

The manifolds were bolted on with the uppipes and no changes were made to tuning or the Wastegates.
The runs were made to compare

Then the gates were tuned back in to.desired back.pressure and they also loaded a different tune and they were still unable to make the same.power as the 6.0 manifolds even with changes. They were able to get over 700 but not close to.where it was.

SEABEE08FX4 · Sep 19, 2012

Interesting, wonder why everyone else was having good results with them.

Dzchey21 · Sep 19, 2012

Does anyone actually have any data tho?

Dzchey21 · Sep 19, 2012

I personally feel that the 2.5 outlet is the biggest issue I think they loose velocity in that area and then a forced to cram back down in a smaller pipe.

TurboM700 · Sep 19, 2012

Dzchey21 said:
I personally feel that the 2.5 outlet is the biggest issue I think they loose velocity in that area and then a forced to cram back down in a smaller pipe.

That was my thought exactly. Bigger is not always better in force induction. Not sure why Steed didnt just make them with a 2" v-band and make the internal design slightly smaller.

Wayne · Sep 19, 2012

Dzchey21 said:
The manifolds were bolted on with the uppipes and no changes were made to tuning or the Wastegates.
The runs were made to compare

Then the gates were tuned back in to.desired back.pressure and they also loaded a different tune and they were still unable to make the same.power as the 6.0 manifolds even with changes. They were able to get over 700 but not close to.where it was.

:whs: Thanks for clearing up what I was trying to say.

Dzchey21 said:
I personally feel that the 2.5 outlet is the biggest issue I think they loose velocity in that area and then a forced to cram back down in a smaller pipe.

You and I are on the same page here. I have some datalogged runs of before and after with the non adjusted gate, and the spartan 300 late lock tune. Spool up was definitely slower on the graphs, and I could feel a difference driving, but barely. I'm only speculating here, but like you I assume the larger diameter piping is causing velocity decrease. We have necked the pipes down from 2.5" to 2" directly after the initial 90* bend to help with velocity & flow (this was done on Mike's truck, as well as the kits we've shipped) . Looks like more testing & development will be necessary to maximize the potential in the design. :shrug: My greatest concern is that if they're necked down to 2" outlets, I doubt much gain is possible over the 6.0 manifolds. Time will tell where the future of these manifolds lie.