mass air conversions
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
this is my plans, and this is what i was going off of. i copied it from a different thread.
its mainlly the fact that i dont want to have to rev it up that high to make power. i want a truck build, lower powerband, lotsa usable tourque downlow. if the motor doesnt make good tourque below 3,000 rpms, then whats the point.
its mainlly the fact that i dont want to have to rev it up that high to make power. i want a truck build, lower powerband, lotsa usable tourque downlow. if the motor doesnt make good tourque below 3,000 rpms, then whats the point.
Potentially.. but at what rpm? The only graph I see is for the complete Performer engine package that includes the truck intake, performer heads, cam, TB, and shorty headers. All that produces a grand total of about 70ft/lbs more which is pretty lousy considering the cost of all those parts, you can get as much total TQ gain from a cam and longtubes on a stock motor and it'll produce more of that TQ at lower rpms.
More Turbo
Joined: Aug 2003
Posts: 606
Likes: 1
From: pleasanton, sfbay
30-80 ft/lb over stock depending on RPM, only when coupled with their heads, cam, headers, TB and exhaust. Geez, doesn't seem like the 5.8 version of these truck manifolds do much of anything to warrant the price tag.
This was not the case with my 5.0L which seemed to benefit from the long runner design on the Eddy truck intake. It got faster when I added the upper&lower to my K&N, longtubes, and exhaust, with stock e7s. Go figure, they say the 5.8 stock manifold is the worse of the two stock truck lowers, but the 5.8 Eddy truck does nothing for power, but the Eddy 5.0 does??
More Turbo
Joined: Aug 2003
Posts: 606
Likes: 1
From: pleasanton, sfbay
Whopping 34 ft/lbs? Doesn't seem too whopping for the $600 it costs to get it. I'm not trying to knock 'em or build em' up or anything; I bought both the 5.0 and 5.8 version, just decided that I'd rather go with a gt40 setup for my 351 swap, which flows better for about the same $ and is infamous for great torque production.
"Potentially.. but at what rpm?"
It says they make that 34ft/lb over stock at 3500rpm, on the side of the box for the #3881 5.8 truck kit. It doesn't show a graph or tell you if that's with a throttle body, etc. If I had to guess it's probably not much more than 10-15 ft/lb better than stock from 2-3k without other add-ons.
mike460: I was under the impression that the TFSR intake was a much larger volume runner intake than the gt40 lower, and wasn't suitable for use in a relatively stock truck 351. I know of guys that run that manifold on blown or stroked setups, in the Lightning community, but I'm surprised it works very well at all in a non-race/high rpm application with those freeway gears you got.
"Potentially.. but at what rpm?"
It says they make that 34ft/lb over stock at 3500rpm, on the side of the box for the #3881 5.8 truck kit. It doesn't show a graph or tell you if that's with a throttle body, etc. If I had to guess it's probably not much more than 10-15 ft/lb better than stock from 2-3k without other add-ons.
mike460: I was under the impression that the TFSR intake was a much larger volume runner intake than the gt40 lower, and wasn't suitable for use in a relatively stock truck 351. I know of guys that run that manifold on blown or stroked setups, in the Lightning community, but I'm surprised it works very well at all in a non-race/high rpm application with those freeway gears you got.
Elder User
Joined: Feb 2001
Posts: 502
Likes: 0
From: atl
mike460: I was under the impression that the TFSR intake was a much larger volume runner intake than the gt40 lower, and wasn't suitable for use in a relatively stock truck 351. I know of guys that run that manifold on blown or stroked setups, in the Lightning community, but I'm surprised it works very well at all in a non-race/high rpm application with those freeway gears you got.
I am looking forward to a gear swap though.....been collecting parts, all I have left is the install kit....
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