Sheepey Inc. tubular exhaust manifold Dyno results
Nov 11, 2013, 03:42 AM
#16
there has been an awefull lot of stock manifolds tested over the years. buschur alone tested like 6 back to back same engine. (best gain 12hp) none came close to these results. all have been in the 5-20hp range. with many of those tests likely snake oil claims. I would say you will not see anywhere near 46hp gains from just replacing manifold.
Did it feel 40 whp faster than stock? Was the stock manifold inspected for possible issues?
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Erik@MIL.SPEC (May 29, 2016)
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211Ratsbud (Jun 18, 2016)
Nov 11, 2013, 10:32 PM
#20
+1 for that. I've tested three tubular manifolds against stock, and none of them were appreciably better than stock. Not sure what to think of +40 whp over stock except that it seems rather unbelievable. Having said that, my level of experience is far from encompassing. I will say that its a very nice looking manifold.
Did it feel 40 whp faster than stock? Was the stock manifold inspected for possible issues?
Did it feel 40 whp faster than stock? Was the stock manifold inspected for possible issues?
The car definitely feels stronger thru out the power band now but not exactly sure by how much tho.... the car did feel restricted before compared to the way it feels now
From what we're seeing it seems like the big power gains are in the mid range & nice gains in the top which from what ive searched are comparable to some other well designed and respected tubular manifolds (not sure if i should mention names)
Btw.... with the small adjustments that Tom has made so far the car finally tickled my bottom region and i am no longer jealous of my passenger being the only ones always satisfied by going for a ride lol
Nov 12, 2013, 09:56 AM
#23
Interesting data.
It lost a bunch of boost below 4k, not necessarily alot of torque though it looks to be no small amount either. The gains up top seem to fly in the face of our testing from awhile ago but we were at 580 on a Black flowing through a TiTek. I wonder if the limited gains we saw were related to the O2 housing not being able to flow anymore and not the header specifically failing to help.
It lost a bunch of boost below 4k, not necessarily alot of torque though it looks to be no small amount either. The gains up top seem to fly in the face of our testing from awhile ago but we were at 580 on a Black flowing through a TiTek. I wonder if the limited gains we saw were related to the O2 housing not being able to flow anymore and not the header specifically failing to help.
Nov 12, 2013, 11:38 AM
#24
Interesting data.
It lost a bunch of boost below 4k, not necessarily alot of torque though it looks to be no small amount either. The gains up top seem to fly in the face of our testing from awhile ago but we were at 580 on a Black flowing through a TiTek. I wonder if the limited gains we saw were related to the O2 housing not being able to flow anymore and not the header specifically failing to help.
It lost a bunch of boost below 4k, not necessarily alot of torque though it looks to be no small amount either. The gains up top seem to fly in the face of our testing from awhile ago but we were at 580 on a Black flowing through a TiTek. I wonder if the limited gains we saw were related to the O2 housing not being able to flow anymore and not the header specifically failing to help.
... So hopefully that will give us a bit more data on how capable the manifold is
Last edited by louiesevox; Nov 12, 2013 at 02:48 PM.
Nov 12, 2013, 08:23 PM
#25
As i said in my prior post that comparison he posted 7k+ is inflated.
Heres two new runs where i was getting afr in line, it still needs more work, but this at least gives a better idea of what's going on.
Louie id recommend we drop the torque down a bit for safety, but its your call.
The gains are definitely not 40whp as that's physically not possible as most already know and pointed out.
So the two back to back there is a discrepancy at high RPM as you can see. Louie in order for the results to be taken serious you must find the flattest smoothest road you can find and make sure its 100% level otherwise vd is no good for comparison stuff like this.
Changing weight in car ( passengers in/out) doesn't help either. We are logging IDC and IPW also, which from my experience raises the # vd spits out due to slowing the logger resolution down.
Heres two new runs where i was getting afr in line, it still needs more work, but this at least gives a better idea of what's going on.
Louie id recommend we drop the torque down a bit for safety, but its your call.
The gains are definitely not 40whp as that's physically not possible as most already know and pointed out.
So the two back to back there is a discrepancy at high RPM as you can see. Louie in order for the results to be taken serious you must find the flattest smoothest road you can find and make sure its 100% level otherwise vd is no good for comparison stuff like this.
Changing weight in car ( passengers in/out) doesn't help either. We are logging IDC and IPW also, which from my experience raises the # vd spits out due to slowing the logger resolution down.
Nov 12, 2013, 09:13 PM
#26
As i said in my prior post that comparison he posted 7k+ is inflated.
Heres two new runs where i was getting afr in line, it still needs more work, but this at least gives a better idea of what's going on.
Louie id recommend we drop the torque down a bit for safety, but its your call.
The gains are definitely not 40whp as that's physically not possible as most already know and pointed out.
So the two back to back there is a discrepancy at high RPM as you can see. Louie in order for the results to be taken serious you must find the flattest smoothest road you can find and make sure its 100% level otherwise vd is no good for comparison stuff like this.
Changing weight in car ( passengers in/out) doesn't help either. We are logging IDC and IPW also, which from my experience raises the # vd spits out due to slowing the logger resolution down.
Heres two new runs where i was getting afr in line, it still needs more work, but this at least gives a better idea of what's going on.
Louie id recommend we drop the torque down a bit for safety, but its your call.
The gains are definitely not 40whp as that's physically not possible as most already know and pointed out.
So the two back to back there is a discrepancy at high RPM as you can see. Louie in order for the results to be taken serious you must find the flattest smoothest road you can find and make sure its 100% level otherwise vd is no good for comparison stuff like this.
Changing weight in car ( passengers in/out) doesn't help either. We are logging IDC and IPW also, which from my experience raises the # vd spits out due to slowing the logger resolution down.
Thanks Tom
Last edited by louiesevox; Nov 12, 2013 at 09:55 PM.
Nov 12, 2013, 09:49 PM
#27
Interesting data.
It lost a bunch of boost below 4k, not necessarily alot of torque though it looks to be no small amount either. The gains up top seem to fly in the face of our testing from awhile ago but we were at 580 on a Black flowing through a TiTek. I wonder if the limited gains we saw were related to the O2 housing not being able to flow anymore and not the header specifically failing to help.
It lost a bunch of boost below 4k, not necessarily alot of torque though it looks to be no small amount either. The gains up top seem to fly in the face of our testing from awhile ago but we were at 580 on a Black flowing through a TiTek. I wonder if the limited gains we saw were related to the O2 housing not being able to flow anymore and not the header specifically failing to help.
Nov 13, 2013, 10:06 PM
#28
Ive gotten a couple of PM's asking about Sheepey inc and what kinda work they do or how to contact them regarding this manifold... so here are a couple of pics and a video to show a bit of what these guys have been doing for yrs now
If your interested or have any questions about picking up one of these manifolds up you can contact Alex over at Alex@sheepeyinc.com He'll take care of ya
Mods...Hope its ok that I posted these pics. If any questions or issues just let me know, Thanks
If your interested or have any questions about picking up one of these manifolds up you can contact Alex over at Alex@sheepeyinc.com He'll take care of ya
Mods...Hope its ok that I posted these pics. If any questions or issues just let me know, Thanks
