View Poll Results: which heads for 440ci stroker? touched up TFS 235cc heads or touched up GM LS7 heads?
hand touched up TFS 235cc heads.
68
51.13%
hand touched up GM LS7 heads.
65
48.87%
Voters: 133. You may not vote on this poll
which heads for 440ci stroker? TFS 235cc or GM LS7 heads?
11-02-2008, 06:04 PM
#21
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A 440 is a 4.187 bore and a 4 inch stroke. Total Engine Airflow Makes the Trickflow 245cc heads and those are exactly what I'd run give the two options.
http://www.totalengineairflow.com/pr...gmhead/tfsls1/
http://www.totalengineairflow.com/pr...gmhead/tfsls1/
11-02-2008, 06:52 PM
#22
Wrong... Been there, done that. ET 4.0 LS7 heads with a stock LS7 intake will make more power than a TFS 235 with a FAST intake... And since the LS7 intake is cheaper than a FAST intake... The overall package is cheaper.
11-02-2008, 09:35 PM
#24
There's a thread that shows the Trickflow 235s vs LS7s on a 440... one with a 262/270 duration cam (designed for the TFS heads) and the TFS 235s made a ton more torque everywhere and got close to the same peak.
When they tried the Stage 3 cam from Katech (made for the LS7), the TFS heads still made the same power and of course more torque.
If you want a street driven 440, the TFS 235s work very well.
When they tried the Stage 3 cam from Katech (made for the LS7), the TFS heads still made the same power and of course more torque.
If you want a street driven 440, the TFS 235s work very well.
11-03-2008, 07:29 AM
#26
Dyno results? And when you say more power, is that peak power only, or average power?
I know your previous dyno results showed the ET LS7 heads with a Wilson Billet Bank intake to make 600 HP on a 402 at the crank, we've made that with the TFS 225's and a unported Fast, and the TFS 235's will make more power then that. https://ls1tech.com/forums/showthrea...416&highlight=
I know your previous dyno results showed the ET LS7 heads with a Wilson Billet Bank intake to make 600 HP on a 402 at the crank, we've made that with the TFS 225's and a unported Fast, and the TFS 235's will make more power then that. https://ls1tech.com/forums/showthrea...416&highlight=
Last edited by Brian Tooley Racing; 11-03-2008 at 11:14 AM.
11-03-2008, 10:56 AM
#30
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All in all, a ls7 car correctly built and a cathedral TFS head car correctly built will make close to the same peak power, but from what i've seen, the TFS stuff makes more torque.
IMO TFS are the way to go.
11-03-2008, 11:25 AM
#31
It's a common misconception that the fast intake runs out of power at XX hp. The fast has been 630+ rwhp NA on cars here.
All in all, a ls7 car correctly built and a cathedral TFS head car correctly built will make close to the same peak power, but from what i've seen, the TFS stuff makes more torque.
IMO TFS are the way to go.
All in all, a ls7 car correctly built and a cathedral TFS head car correctly built will make close to the same peak power, but from what i've seen, the TFS stuff makes more torque.
IMO TFS are the way to go.
11-03-2008, 12:28 PM
#33
i read in TEA website :
http://www.totalengineairflow.com/pr...gmhead/tfsls1/
that the TFS 235cc heads are for 4.125" bore.
and
the TFS 245cc heads are for 4.155" bore.
and the 441ci LS7 short block is actualy 4.125" bore and 4.125" stroke so i thought the TFS 235cc heads would be the choice.
http://www.totalengineairflow.com/pr...gmhead/tfsls1/
that the TFS 235cc heads are for 4.125" bore.
and
the TFS 245cc heads are for 4.155" bore.
and the 441ci LS7 short block is actualy 4.125" bore and 4.125" stroke so i thought the TFS 235cc heads would be the choice.
11-03-2008, 02:17 PM
#34
We have built both of these combos and the TFS headed 440 make ALOT of USABLE power under the curve and STILL peak over 600rwhp with all supporting bolt ons.. At about 620rwhp the FAST 92 seems to become a restriction with MAP readings dropping to 94KPA around 4500rpm....
LS7 heads are a good choice for a RACE motor that isnt driven on the street, but for USABLE power without spinning to the moon the TrickFlows are the ticket HANDS DOWN...
LS7 heads are a good choice for a RACE motor that isnt driven on the street, but for USABLE power without spinning to the moon the TrickFlows are the ticket HANDS DOWN...
11-03-2008, 02:20 PM
#35
We have built both of these combos and the TFS headed 440 make ALOT of USABLE power under the curve and STILL peak over 600rwhp with all supporting bolt ons.. At about 620rwhp the FAST 92 seems to become a restriction with MAP readings dropping to 94KPA around 4500rpm....
LS7 heads are a good choice for a RACE motor that isnt driven on the street, but for USABLE power without spinning to the moon the TrickFlows are the ticket HANDS DOWN...
LS7 heads are a good choice for a RACE motor that isnt driven on the street, but for USABLE power without spinning to the moon the TrickFlows are the ticket HANDS DOWN...
The 440ci engine you did with the TF's, what if you just changed to a sheet metal intake..what increase in peak power would you expect? I know you may lose some low end torque of course.
11-03-2008, 06:37 PM
#36
Dyno results? And when you say more power, is that peak power only, or average power?
I know your previous dyno results showed the ET LS7 heads with a Wilson Billet Bank intake to make 600 HP on a 402 at the crank, we've made that with the TFS 225's and a unported Fast, and the TFS 235's will make more power then that. https://ls1tech.com/forums/showthrea...416&highlight=
I know your previous dyno results showed the ET LS7 heads with a Wilson Billet Bank intake to make 600 HP on a 402 at the crank, we've made that with the TFS 225's and a unported Fast, and the TFS 235's will make more power then that. https://ls1tech.com/forums/showthrea...416&highlight=
11-03-2008, 08:48 PM
#37
though the LS7 heads did seem to have more of it as the revs got higher
11-03-2008, 09:29 PM
#38
We have built both of these combos and the TFS headed 440 make ALOT of USABLE power under the curve and STILL peak over 600rwhp with all supporting bolt ons.. At about 620rwhp the FAST 92 seems to become a restriction with MAP readings dropping to 94KPA around 4500rpm....
LS7 heads are a good choice for a RACE motor that isnt driven on the street, but for USABLE power without spinning to the moon the TrickFlows are the ticket HANDS DOWN...
LS7 heads are a good choice for a RACE motor that isnt driven on the street, but for USABLE power without spinning to the moon the TrickFlows are the ticket HANDS DOWN...
Last edited by Abdullah; 11-03-2008 at 09:36 PM.
11-03-2008, 10:55 PM
#39
Anyway, I think the perfect roll racer would be a 451ci, sheet metal with a 101mm TB, ported LS7 heads and 11.5:1 cr. and a 2-stage 300 DP shot.
All Pro's would be nice, but way too much money. Don't the ported LS7's flow just about the same, int and exh ports?
11-04-2008, 12:37 AM
#40
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Hmmmm. Your the first person that mentioned a sheet metal intake for a street car, I'm all for it too. Too many people keep bringing up the loss of low end torque. Who cares if you lose some torque, think about all that you would have.
Anyway, I think the perfect roll racer would be a 451ci, sheet metal with a 101mm TB, ported LS7 heads and 11.5:1 cr. and a 2-stage 300 DP shot.
All Pro's would be nice, but way too much money. Don't the ported LS7's flow just about the same, int and exh ports?
Anyway, I think the perfect roll racer would be a 451ci, sheet metal with a 101mm TB, ported LS7 heads and 11.5:1 cr. and a 2-stage 300 DP shot.
All Pro's would be nice, but way too much money. Don't the ported LS7's flow just about the same, int and exh ports?
and i've known others who have done it too.