How bad would AFR 165's hurt me?

[9 Deuce GT]

I am trying to out my 351W together, and money is getting tighter. My original plan was to sell the AFR 165's and get 185's, but now the money that I needed to get the new heads has been used for other things, (not Mustang related). I am wondering for a strickly street car (maybe one or two passes a year), would the AFR 165 heads kill me. Here is the combo:

351w short block (40 over)
TFS stage 2 cam
TFS 351w intake
1 3/4" BBK longtube headers
24# injectors
75mm TB (coming soon, for now stuck with the 65mm)
75mm MAF
1.6 rr

 

[Sgt.5point0]

Maybe look into going to a reputable speed/machine shop and having some larger valves put in your 165s. I think that's what I'm going to do when I go to a 331.

 

[notchback]

how deep into the 11's were you running b4???

those heads should support you into the 10's.

 

[autoXr1]

I'd probably call the AFR tech line. They will have the flow numbers for the two heads, as well as, information about different combos. From what I understand, the exhaust valve is the same between the 165 and 185, so there may be some evidence to suggest that the 205's might be a better choice for a 351. However, these heads are suggested for performance driving, WOT, etc.

As mentioned above, the 165's will work well, especially for a street car. You should have excellent velocity through those heads with a 351, so I would guess that low end drivability might be pretty good. However, at WOT, it might be a bit air hungry. For all practical purposes, with a 351, you should have the torque around town to all but eliminate WOT. As a general rule, I rarely get the chance to put the pedal down around town. No need for it.

 

[Dark Knight]

FWIW, the 165 and 185 are the same casting... you could always have someone do some port work to bump up the flow... maybe see if AFR will CNC them to the 185 ports too..

 

[9 Deuce GT]

ttt

 

[houstonstangguy]

just wondering if you already have the stage 2 cam or were just planning on using that cam. I might be a little more worried about that cam being too small with a 351 than the heads. Personally I would use the stage 3, but I was just wondering your reasoning on the cam.

on a different note why not just try to trade the 65's for some 85's, or instead of buying new 185's like you wanted to, why not sell the 165's and buy used 185's? shouldn't be much difference in price used. definitely cheaper than new ones.

 

[QDRHRSE]

I've got 185's for sale!!!

 

[QDRHRSE]

I've got 185's for sale!!!