Tfs 235 vs. Prc 247
07-14-2018, 12:47 AM
#22
TECH Veteran
My buddie Mike traps 132 or so with a 402ci with TFS 235s done by TEA. Pat G cam that's a hydraulic roller.
So I say 4 mph or so faster with a solid roller helping the mast heads.
07-14-2018, 05:36 AM
#23
In Big Hammer case his Mast headed big bore 388 cubic traps 136 mph or so with a solid roller.
My buddie Mike traps 132 or so with a 402ci with TFS 235s done by TEA. Pat G cam that's a hydraulic roller.
So I say 4 mph or so faster with a solid roller helping the mast heads.
My buddie Mike traps 132 or so with a 402ci with TFS 235s done by TEA. Pat G cam that's a hydraulic roller.
So I say 4 mph or so faster with a solid roller helping the mast heads.
07-14-2018, 05:53 AM
#24
In Big Hammer case his Mast headed big bore 388 cubic traps 136 mph or so with a solid roller.
My buddie Mike traps 132 or so with a 402ci with TFS 235s done by TEA. Pat G cam that's a hydraulic roller.
So I say 4 mph or so faster with a solid roller helping the mast heads.
My buddie Mike traps 132 or so with a 402ci with TFS 235s done by TEA. Pat G cam that's a hydraulic roller.
So I say 4 mph or so faster with a solid roller helping the mast heads.
1. Robz 388ci tfs 245 headed solider roller ran 9.3 trapping 148mph in a 3000lbs manual tranny corvette.
2. I personally ran 10.3 and trapped well over 130mph in a ls2 6.0 stock shortblock, tfs 220, btr 4, hyd roller car with 3250lbs fbody
3. Chrs1313 ran 9.8 and ran well over 130mph with a ls1 5.7 stock shortblock tfs 215 3000lbs fbody
Im sure Mast heads are great and PRC does a good job, but its hard to beat the TFS head which is a proven combo
Last edited by Public Enemy; 07-14-2018 at 06:01 AM.
07-14-2018, 10:23 AM
#27
TECH Veteran
07-14-2018, 12:10 PM
#28
11 Second Club
"You may be asking yourself,” How does a racer know which head would fit his engine combination”? Bottom line is, they can’t. People on the internet, racing buddies, friends or novices have your best intentions at heart when they speak up and give you recommendations regarding your engine, cylinder head and manifold choices. They are also the least qualified to make that determination. This type of “internet” research almost always ends badly! I help about ten people a day pick out the correct head manifold combination for their engine. Sadly, I am confronted by the fact that more than 50% of these people had to spend their money twice because they got bad advice! Dropping $3000.00+ on a set of heads is hard enough without having to do it twice! What type of cylinder head and intake manifold you need should be left up to professionals? Professionals whose life long discipline has been to research, develop, design, manufacture and test cylinder heads on every conceivable engine combination possible. Professional engine builders like Reher-Morrison and cylinder head designers like myself work out what cylinder head and intake manifold packages make the most power for a wide range of engine combinations ranging from reliable 7500rpm bracket engines to 11000rpm small blocks. We do the testing of camshafts, intake manifolds, heads and hundreds of other components on a daily basis. Why would anyone want to spend their own money to test what we have already tested?We have already invested huge sums of money, time and research so you don’t have to!"
This dood a troll. His 650rwhp nine second race cah. Runs tens. Barely faster than his master with a "bolt on" ls6. You should be trapping 150+mph, at least, hams.
Why I try not to tell people what to do or "buy" for their engine. If someone want's my opinion sure. I'd probably be asking way too many questions. Do lots of research, talk to the right people, & your decision will hopefully work out good for your goals. Good luck OP!
07-14-2018, 01:26 PM
#29
Just for the record on why i prefer tfs over other heads due to the following:
1. Robz 388ci tfs 245 headed solider roller ran 9.3 trapping 148mph in a 3000lbs manual tranny corvette.
2. I personally ran 10.3 and trapped well over 130mph in a ls2 6.0 stock shortblock, tfs 220, btr 4, hyd roller car with 3250lbs fbody
3. Chrs1313 ran 9.8 and ran well over 130mph with a ls1 5.7 stock shortblock tfs 215 3000lbs fbody
Im sure Mast heads are great and PRC does a good job, but its hard to beat the TFS head which is a proven combo
1. Robz 388ci tfs 245 headed solider roller ran 9.3 trapping 148mph in a 3000lbs manual tranny corvette.
2. I personally ran 10.3 and trapped well over 130mph in a ls2 6.0 stock shortblock, tfs 220, btr 4, hyd roller car with 3250lbs fbody
3. Chrs1313 ran 9.8 and ran well over 130mph with a ls1 5.7 stock shortblock tfs 215 3000lbs fbody
Im sure Mast heads are great and PRC does a good job, but its hard to beat the TFS head which is a proven combo
07-14-2018, 01:29 PM
#30
TECH Veteran
01-24-2019, 04:43 PM
#33
PRC 247 heads are good for the money. But, every combo I've seen that does 570+ with them has something close to 30 degrees of overlap or more. But they do run hard at the track. I'd like to see them with a milder 240/248 type of cam with 20 degrees of overlap.
Honestly, most of the heads... AFR 230, TFS 235/245, PRC 247, Mamo, pick any LS3 head you want, MAST, Frankenstein, SPS, Brodix, etc... they are all $2500 and up. And all will make power. It's the rest of the combo that matters...
Honestly, most of the heads... AFR 230, TFS 235/245, PRC 247, Mamo, pick any LS3 head you want, MAST, Frankenstein, SPS, Brodix, etc... they are all $2500 and up. And all will make power. It's the rest of the combo that matters...