TFS 235 vs PRC LS7 Small Bore on 416 LS3
03-29-2019, 02:20 PM
#1
TFS 235 vs PRC LS7 Small Bore on 416 LS3 As the title states, which would you guys do?
The LS7's seem to flow 30-40 better on the intake side, but also are down a fair chunk on the exhaust side compared to the TFS Cathedrals.
Going in a car with a 4k stall that will be street driven far more than track time.
The LS7's seem to flow 30-40 better on the intake side, but also are down a fair chunk on the exhaust side compared to the TFS Cathedrals.
Going in a car with a 4k stall that will be street driven far more than track time.
Last edited by 98RedBird; 03-29-2019 at 02:30 PM.
03-29-2019, 03:25 PM
#3
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Ls7’s for me.
03-29-2019, 07:35 PM
#5
TECH Veteran
TFS 245s
03-30-2019, 07:43 AM
#7
Jake, do you have any experience or have any links to track/dyno runs for the haymakers? They look nice, I just haven't seen much of them. MLRE and Brodix are releasing a new cathedral head that looks really good.
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03-30-2019, 10:46 AM
#8
Mlre ?
03-30-2019, 11:36 AM
#9
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Originally Posted by JakeFusion
SPS Haymakers...
03-30-2019, 12:40 PM
#12
If he wants something special get Libery ls3 - 11 degree heads(400 ea) and $1k port program Meant for the combination. Reason i'll never get OTB. i like feeling somethings Meant just 4 me and what i'm doing.
CSA matched to & for the combination
CSA matched to & for the combination
Last edited by Smokey B; 03-30-2019 at 12:56 PM.
03-30-2019, 01:38 PM
#13
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Originally Posted by JakeFusion
The new FED castings? He's reconsidering? The problem is, the cost is a $1200 difference...
03-30-2019, 07:55 PM
#17
Better casting, bigger spring pads, custom valve angles 10 or 15 degree. Things you get with the FED head.
Hell just looked Darth, RHS ls7 valve lengths for ls3 heads. Raised runner.
Hell yea! 2yrs looking, Chris list valves 5.6 inches long RHS ls7 valve length. No other valves are this long for a Ls3 or Ls7.
Hp vs Cost? 20-30 more hp maybe from a head swap.
Hell just looked Darth, RHS ls7 valve lengths for ls3 heads. Raised runner.
Hell yea! 2yrs looking, Chris list valves 5.6 inches long RHS ls7 valve length. No other valves are this long for a Ls3 or Ls7.
Hp vs Cost? 20-30 more hp maybe from a head swap.
04-01-2019, 10:05 AM
#18
Long story short, I'm going with the TFS 245's again.
Had the originals cut down to 64cc. Which in an of itself is not an issue since that's only about .036"
But... the engine came back from TMS having been cut about .017" as well per side (no idea why), so things got way too tight for the FAST 102 to fit. Really not a fan of using a thicker gasket to make up for the amount that Thompson cut off because that pushes my quench up into the .050's. No good.
I found a buyer for my 64cc TFS 245's and was just considering a few other options to replace it with (uncut).
Ultimately wound up going with the 245's again.
Had the originals cut down to 64cc. Which in an of itself is not an issue since that's only about .036"
But... the engine came back from TMS having been cut about .017" as well per side (no idea why), so things got way too tight for the FAST 102 to fit. Really not a fan of using a thicker gasket to make up for the amount that Thompson cut off because that pushes my quench up into the .050's. No good.
I found a buyer for my 64cc TFS 245's and was just considering a few other options to replace it with (uncut).
Ultimately wound up going with the 245's again.