New Trickflow GenX 21* LT1 heads???
Thread Starter
Registered User
Joined: Oct 2006
Posts: 270
From: La.
New Trickflow GenX 21* LT1 heads???
Anyone have any info in these? I heard they were on display at SEMA.
http://www.trickflow.com/pressreleases/GenXGMLT1/
Nothing solid, but I was able to find the bits of info below from posts on another forum. I think they are supposed to be released in January. It should be interesting to watch.
Lift Intake Exhaust
.100 65 54
.200 138 117
.300 202 162
.400 243 189
.500 270 197
.600 273 209
retail pricing is $1395.95. Here are the specs.
185cc intake runner
54cc chamber
2.02 intake valve,1.60 exhaust
comes with 1.300 beehive spring
150lbs @1.800 installed
450lbs @1.200 open
448 lbs per inch rate
.600" max lift
includes LT1 and LT4 gasket alignment holes
21 degree valve angle.
http://www.trickflow.com/pressreleases/GenXGMLT1/
Nothing solid, but I was able to find the bits of info below from posts on another forum. I think they are supposed to be released in January. It should be interesting to watch.
Lift Intake Exhaust
.100 65 54
.200 138 117
.300 202 162
.400 243 189
.500 270 197
.600 273 209
retail pricing is $1395.95. Here are the specs.
185cc intake runner
54cc chamber
2.02 intake valve,1.60 exhaust
comes with 1.300 beehive spring
150lbs @1.800 installed
450lbs @1.200 open
448 lbs per inch rate
.600" max lift
includes LT1 and LT4 gasket alignment holes
21 degree valve angle.
Registered User
Joined: Apr 2000
Posts: 2,670
From: T E X A S
Thats pretty impressive, I imagine with some aditional port work those would be a killer set of heads. Amazing how many choices we have for heads on our LT1s compared to just 6 or so years ago. Looks like these companies still like us 
Registered User
Joined: Aug 2003
Posts: 286
From: Florida
I hope they fixed the spring seat problem they had with the previous heads. If you look at a pair of the trick flow heads side by side with the AFR heads, you will see that the two center spring seats which are near a bolt hole are visibly smaller than the rest. I guess they figured you would run two smaller diameter springs, lol.
Here are some pics from when I had a set machined for my first motor. The motor got stolen unfortunately.
It is the springs for the two exhaust valves in the center that you can see here:
here is a measurement of the seat in question:
and the rest were like this:
and the machine work to make them all the same size:
Is there any word on what the differences are in this head and their previous offerings?
Here are some pics from when I had a set machined for my first motor. The motor got stolen unfortunately.
It is the springs for the two exhaust valves in the center that you can see here:
here is a measurement of the seat in question:
and the rest were like this:
and the machine work to make them all the same size:
Is there any word on what the differences are in this head and their previous offerings?
.
Registered User
Joined: Oct 2007
Posts: 220
"comes with 1.300 beehive spring
150lbs @1.800 installed
450lbs @1.200 open
448 lbs per inch rate"
I find that somewhat interesting. With the beehive springs you are supposed to be able to run less spring pressure. Interesting that the spring pressure is creeping up.
150lbs @1.800 installed
450lbs @1.200 open
448 lbs per inch rate"
I find that somewhat interesting. With the beehive springs you are supposed to be able to run less spring pressure. Interesting that the spring pressure is creeping up.
Registered User
Joined: Jun 2003
Posts: 3,557
From: Carol Stream, Il.
I thought the open and closed pressures looked about the same. Have the specs on the Patriots Extremes handy?
Registered User
Joined: Apr 2006
Posts: 1,083
From: O'Fallon, MO
Max. Valve Spring Lift: 0.660"
Spring Pressure Closed: 155 lbs. @ 1.800"
Spring Pressure Open: 410 lbs. @ 1.140"
Coil Bind: 1.090"
Retainer Material: Titanium
Spring Pressure Open: 375 lbs. @ 1.150"
Coil Bind: 1.090"
Retainer Material: Titanium
Registered User
Joined: Oct 2001
Posts: 584
From: NC Burlington
