10secondTVR

Hi Guys,
I have been on here before but my email has collapsed, no idea what my passwords are etc...
I have a TVR Cerbera (2600lbs) with a 416CI LS3 base, fully forged on Kinsler ITB's, but i am on DART 225 heads which i have opened the combustion Chamber up to match the 4.065 bore, plus a porting job and 5 angle valves, however these are the Standard 2.02/1.6 sizes.
I want to stay with Cathedral ports because i want to keep the ITB's.
Would i see gains if i went for Trickflow 245's for instance?
I am running a 244/256 cam, i would like to go a little milder on the cam as we pay 3 times what you do on gas!
It will run a 10.63/132 at the moment, 202mph verified top speed.
What are the considered cathedral heads these days???
Ive attached a pic of the car so you get the idea!

Tuskyz28

Brian Tooley hand finished Trickflow 245s. They seem to be getting faster and faster.....

TrickFlowTech

Outstanding Machine!

10secondTVR

But would i see any benefits!!??

LS1MCSS

iTrader: (18)

You would probably see a small benefit from the better heads but if you go smaller cam you will cancel out the head swap, in my opinion.

NAVYBLUE210

Tony MamoMotorsport (MMS) 235s with NFI (Nitrous/Forced Induction)
Exhaust Port. With something like 239*/243* ~.650"/.630" ~114*+3*
For Cam Specs. Better Performance, Better driveability (smoother), little better economyWhen cruising,
tough to get better performance & economy from the same
CID & performance, but it is possible with Better Heads which allow
A more Optimized (smaller duration & smaller exhaust split) Cam.

Money no object LLSR Cam from Cam Motion slightly less duration
But more lift, 241*/245* (subtract ~6* for Lash & HR Equivalency,
~= 235/239) .690"/.670", make up the power with increased lift
& + 1000 RPM.

big hammer

Might as well go for good stuff. Mast 245 cathedrals. Flow 372 on a 4.065 bore plate. Gonna have a hard time beating that. Watch the flow Numbers there's a handful of companies that advertise flow numbers with a 4.125 or larger bore plate to make the heads look better than they are

https://www.mastmotorsports.com/products/ls1-245

wannafbody

iTrader: (2)

Mast has some awesome stuff.

10secondTVR

Sooo...
Tooley touched Trickflow or Mast?
I will have to match my ITB's to the Inlet port, but thats no biggie.

Tuskyz28

Mast is a great head period. Expect to spend north of 4 grand on the Mast heads with all the gadgets. I just see more Tooley hand finished TFS 245s on motors because they're cheaper but it's plenty of guys running 4s in the 1/8 mile mile with Tooley heads and his customer service is top notch. Therefore I vote TFS

10secondTVR

My 256 exhaust lobe is low a .596, but i only have 1"3/4 headers i am limited on space.

NAVYBLUE210

Voting twice,
You must be special.

Fishmasterdan

General rule of thumb 2 cfm is 1 HP. Compare your cfm gain and see if it's worth it for your budget.

wannafbody

iTrader: (2)

Explain how you figure that... lets say 300 cfm intake times 8 cylinders is 2400 divided by 2 is 1200 HP. That doesn't seem correct to me.

NAVYBLUE210

Closer to 2 HP (crankshaft) per 1 CFM.
300 CFM enough for 600 HP.
Gasoline potential could be as high as 2.2 HP per 1 CFM with
Optimal utilization (compression, rpm, cam timing and on and on)

G Atsma

I have a feeling that 2cfm per cylinder head flow is worth 1HP on the whole engine.
Example: The difference between a stock 243 head port and one with a Stage I TSP CNC port job is 53cfm PER PORT at .600 lift. That would equate to about 26 HP gain on that port job, with no other changes, on the WHOLE engine. TOTALLY makes sense.
Let's not overthink this...

big hammer

It's one port runner CFM X 2.2 = max potential output. Not every port combined. Also that's not the actual peak that's the theoretical max output NA.

G Atsma

Well that is the opposite of the way I put it, but your way makes sense once I did the math on a hypothetical case.
Thanks Hammer!

Tuskyz28

Yes I am a pretty special guy. If you ever visit Mast website and build you a set of heads using all the top notch components you'll see a MAJOR price difference between mast heads vs TFS done by Tooley. It's not hard to tie 4500 dollars into a set of mast heads Dan. And you always talking about Tony customer service is A1. I know that about Tony.. hard worker that barely sleeps but Tooley customer service is A1 as well and he even calls to make sure you get all your parts etc on time and all.

What I do know for a FACT about heads/porters?

I know every time I've visited LS fest I've seen a Trickflow 245 heads on different applications outperformed some heads that cost more money than TFS heads. Ask James Short who is one of the most respected tuners in the United States period what heads makes the most power on his stingy *** dyno and see what the answer be. He have dynoed EVERY LS head you can think of. And yet he is no salesman eithier.

NAVYBLUE210

Correct & stated better!
Thank you.