hahaha

 

no way man , but would be close with an AFR heads and a lsx

 

Definetly. Ever hear of SAM Racing?

9.teens @ 154 with LS6 heads feeding a 427, but hey... look at the mph.
They flowed 380cfm intake/275cfm exhaust.

No need for AFR heads when there's plenty of meat on the LS6 heads and you can get them to 205cc+ with a shitload of port velocity.

Nuff said

Mike

 

The heads were done by one of the best in the business... Scott at Midwest Engine Tech in Mokena, Illinois. The tuning was done by one of the best in the business... Dan at FLP in Naperville, Illinois. To suggest that it's the heads or the tuning (Speed cannot out tune FLP) is not even close to being the solution. The temp, the 12 bolt, and cats all contribute to power loss. What about the cam? It seems like he wasn't the only one that has gotten lower numbers from this cam. Look at the one variable that remains consistant... the cam. I wouldn't waste your money on a ported throttle body either.

 

i tell you what, go to the track and see how she does, if you pull off some high traps and low times dont worry. lost of cars out there dyno low but somehow shine at the track. there could be something a little off in the set up but should still net some good power. this cam is proven itself and im wondering if something else has changed from our setups compaired to the guys with big power. A4 with stall, milled afr heads, 12 bolt f13 cam with 90/90 put down 450-460 at the wheels, i guess everything has to work together, even though i have read afr+f13 not getting great results

 

im gonna be gettin some afr heads and that should be what i need to gain my lost power. the flp heads themselves are good, they just had a 224/581 cam put down over 420rw with the same heads. it appears the heads dont like this cam for whatever reason so im gonna try the afrs. im pretty sure ill get some horse outta those. plus those heads leave some room for more stuff later down the road.

ALSO, is 66cc alright for this cam?

 

anyone, comments on this.

 

ive got afr heads on mine and the car feels like it has a hell of a lot of power. the are 66cc but if you can get them milled to 61 or62 that would help even more

 

Guys , I have the f13 and had my heads mildly ported by a guy that only touched the short turn radious in the heads and bowl work. I did put 2.02 int. valves and stock 1.55 exh valves.
My heads flow 256@.500 -.257@.600 int. and exh= 219 @ .600 and with my f13 through the Edelbrock muffler, 12 bolt with 33 spline axles and Eaton posi the car makes 396hp 390tq
Now open the cutout and the car makes 420 hp and 405 tq so that is just to show what a restrictive exh can do. (cats) and I dont recall what exh he said he ran behind the cats but if its not a high flowing one like Hooker , Magnaflow or a loudmouth then I can see his numbers being off.
I gained 10 hp with a pulley , and not sure on dyno numbers for a ported throttle body but I picked up 1.5 mph from it. That is worth about 10 hp alone.
Get these bolt ons and try a cutout or bypass the cutouts before you jump to conclusions . Those that feel a car with only 420 hp with a m6 is low, It will run 11.3's @121 mph at 3700pounds race weight.
DYNO's are just for tuning, the real test is what it runs at the track.

 

the only thing that still gets to me is the fact i only have 360 tq after the cam, before it i had 350 tq. so something is off in the setup still and i cant figure out what it is.

 

It's not the heads. Take off the cats and dyno it on a cooler day.

 

Which Dyno was it? If Mustang, your numbers might be a little lower than some others...

 

i dont think the cats combined with heat is holding back the car this much, especially tq wise. when i cant match a cam only car with the same cam, thats pretty bad and i have heads, heat and cats shouldnt make my heads a non factor in my setup.