After i switched from Patriot stage 2 heads to Trickflow 235 with the same CC i noticed the following while tuning the car on street :
1- The MAP increased while idling by 4 kpa
2- The car need nearly 10% extra fuel in the top end due increase of air flow
3- The MAP now is reading 97 kpa @ WOT which mean my unported FAST90/90 setup is buttle nick now maybe its time to update to ported 102 setup
i hoop to have cash soon 1400$
4- Noticed 1.2 sec improve in acceleration from 60-125 MPH
5- The car is not accepting more than 26 degree of timing after 6000 RPM ( before was 28 )

still working on the tune and hoop to put it on dyno soon to see how much it will put

 

any comments ?

 

TFS out of the box or did someone do some extra portwork.And how much did they run you, and do you have any cfm numbers on those heads.

 

Nothing here really surprises me....Any rwhp #'s and what tranny???

 

no extra work done
this is the link for heads
http://hinsonsupercars.com/p-1027-tr...ted-235cc.aspx

 

any rwhp #'s??

 

M6 tranny before TF235 it put down 490/480 i think now i should see 520whp
still no dyno numbers

 

when you say same CC, are you referring to combustion chamber cc?

if so, what would cause it to take less timing? i thought after market heads had better quench pads, and thus could take more timing at the same compression.

i have also heard that the increased airflow is requiring less timing to make the same combustion chamber pressure, and thus you can make more power with less timing on better heads.

im not too well schooled so i figured i would ask for some clarification

 

the same combustion chamber as before 64 cc
regarding timing maybe it need a real tuner to judge this point
it will be tuned by one reputable tuner maybe after one week and we will see

 

I have the TFS 220's. Ryan said my car picked up nothing at 28* so he backed it down to 26* I have seen this on AFR heads too but the OEM cathedrals seem to make best power with a little more usually 28*...