Trickflow 215R heads 205/160 for the 383 for my 91, with a superram and a custom Comp hyd.roller: 224/224, 568/568, on a 114LS.
I will dyno the engine with a carb and Victor JR, hoping for 450hp.
We just got my TFS 215R heads flowed, before and after porting.
We didnt enlarge the runners, just alot of cleanup work.
We also flowed a set of AFR 195 CNC heads, before and after mild clean-up work only,
we lost about 5 cfm from the clean-up work around the guide on the AFRs???????.
TFS claims these #s (I wish):
LIFT INT EXH
100 70 56
200 137 95
300 186 137
400 230 168
500 262 193
600 282 211
700 288 223
TFS heads out the box:
LIFT INT EXH
200 128 113
250 159 137
300 185 156
350 208 166
400 229 172
450 242 177
500 250 180
550 259 184
600 260 186
650 260 187
700 262 186
TFS heads ported:
LIFT INT EXH
100 ?
200 137 114
250 168 139
300 196 161
350 220 178
400 242 194
450 259 206
500 271 214
550 277 221
600 281 227
650 285 232
700 287 236
They have huge exhaust port - and it shows.
I wish they would have flowed better high lift number out the box. But they have good mid lift numbers now.
I may do a good valve job on the intake if I can get 10cfm across the board.
What do you guys think.



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91 B4C 305 TPI - SOON TO BE 383
TREMEC 5-SP, STOCK 1-BOLT REAREAND w/342 GEARS, K&N, AIRFOIL
EDELBROCK HEADERS, DUAL CAT TO HOMEMADE Y-PIPE & 3.5" SINGLE PIPE W/ FLOWMASTER, CRANK PULLEY, MSD, FUEL PRESS REG, COWL HOOD, WELD WHEELS
14.1@ 98MPH
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OTHER RIDE
67 CAMARO - STREET CAR, BIG BLOCK, PUMP GAS
350TH w/ATI 10", 12-BOLT w/373 GEARS
10.47@129 1.55 60FT. ON MOTOR - ET-STREETs w/MUFFLERS

Those sound about right.. you will often see a little optimistic numbers from the vendor. What they say is out of the box is after a real good cleanup. You should have n/p with 450 hp.

I take it the measuresments are at 28"?

You need to get your superram ported dude. The superram will choke that flow down to about 70% of the total.

https://www.thirdgen.org/messgboard/...ML/004355.html