I’m looking to by heads for my 02 MN6 vert with just over 20k on the clock. I’m trying to decide between the TF 215 (which I’m leaning to) or the ARF 210 or 215. The bottom end is stock (actually the motor has not been opened up except to install the cam). Clutch is stock.

I’m also going to order either the DTE or RPM diff brace and a new harmonic balancer (since I’m still running the oem and feel like I’m on barrowed time).

What I’m looking for here is if someone is running anything similar to this setup, what street manners the car could/should have (I realize the tune has allot to do with this), as well as the numbers being put down.

Mods to date are in my sig but just to list a few (not saying I have a bunch):

TSP Torquer V2 cam 232/234 595/598 112 LSA
LG Super Pro Headers (1 3/4), high flow cats, Xpipe, Z06 TI Mufflers
PAC Racing Beehive Springs
Chrome Molly Push rods
LS2 Timing Chain

With these mods the car has dyno’d at 408/386 (with stock 241 heads). My goal is to push it as close to 450/44x.
I would like to see the rwhp/trq numbers have a closer number compared to the spread I have now. Since I have a stock bottom end not sure more power would be in my favor.

Any input would be greatly appreciated. I’m starting my research here before I reach out to the speed shops.

Thanks in advance!

 

I had TFS-215's (64cc), 228/232 cam, and a FAST intake and made 456rwhp on 91 oct. If I had ported the FAST and ran the 59cc head, it would have been in the 470-480 range. I love those heads - they make awesome power.


Now I have a blower

 

Both head choices are fantastic for power, torque, and driveability.
The TrickFlows having a 13 degree valve angle might help with piston to
valve clearance especially if you mill them to 59 cc for increased comp.
Total Engine Airflow offers powdered metal valve guides for the TFS
heads to be compatible with factory rocker arms. Getting the compress-
ion ratio up to 11.0-11.2:1 will help narrow that hp and tq gap. Also
the factory 28.8 injectors max out at around 430 rear wheel horsepower
You'll definitely be well beyond that with either heads.

 

Thanks “tlove” for the response. Were you completely bolt-on with stock bottom end? If so, any issues (as long as you behaved!!!)? Not looking to buy the FAST and I realize HP left on the table with the Z06 manifold but supposedly the TF’s were designed with the Z06 manifold (with that said I'm sure the FAST will out flow them at that level).
The FI route was/is a thought but I would need to change the cam. Looking to stay within the parameters of the bottom end but I realize tons of people are running FI with stock bottom ends.
Thanks again for the input!

 

Thanks A.R. Both you and “tlove” bring up spec’s that really need to thought about as far as combustion chamber and comp ratio (especially to hit the hp/tq numbers I’m looking for) as well as decent street manners on pump gas. I harp on the bottom end but I don’t abuse the car but it doesn’t get choked with carbon either. I know I need a set of heads because the cam is out flowing the stock heads and it’s obviously the next step.
One thing I did leave out of the original post is it also has a K&N bridge & filter (not by choice but my cousin races sprints cars and K&N is a sponsor so you get the picture).
Both you and “tlove” mentioned 59cc chambers (which I was still deciding) but I was thinking the 11 – 11.5 compression ratio.
Again, thanks for the input. Anything else comes to mind please reach out. You make good points on the stock rockers.

 

if you want that comp ratio go with the TFS and have them milled to 59cc's

my car was as modded

vararam b2
fast 90/92
tfs 215cnc with over sized valves
whiplash2 cam
42 lb injectors
1 3/4 in long tubes with xpipe
harland sharp roller rockers
7.55in push rods
patriot duel springs

made 478/425 through 410 gears(on an all stock 123K mile bottom end) on a dyno that has been seen to be pretty darn acurate.

bottom line the TFS heads make the power and like the other post said with the valve angle at 12.5 degrees milling them will go a little easier if that is the high compresson you want to go with.

im now moving up to a forged 370 set up to go boost. let me know if u need any parts for your swap. i have things like push rods and rockers and springs if u are interested, please pm me.

good luck and let us know how it goes!

 

I have the TF 215's and you will love them. I've got a bigger cam (ECS big NA cam), kooks headers, ported fast 92/90, BAP, injectors, all the supporting stuff, etc...Stock bottom end though

Car puts out great power. Put 460whp on a very stingy mustang dyno, and 512whp on a generous dynapack in perfect conditions....So i'd say it's right around 490-500whp on average.

As for driveability.....the cam and tuning is the big deciding factor.

 

Yes - the NA setup was with the stock bottom end. Now I have a forged bottom end with the s/c (sold the N/A stuff)

As for FI - you don't need to change the cam. The torquer will make awesome power with a blower. Superchargers aren't as susceptible to to cam overlap as turbos.