[slowbird]

Just thought i'd add some tech to the board, maybe generate some discussion.
Valve sizes on the heads ranged from 2.28 to 2.365. HP heads have made 1050 horespower with 1 carb and a cam that is gental on valve springs, other heads have not been run yet.

..........HP / PP / Tiger
.200 125 142
.300 194 218 221
.400 266 292 287
.500 334 349 367
.600 387 402 421
.700 417 446 453
.800 425 470 466
.900 428 477 478
1.00 430 480 484

[Scott Stoneburg]

Do you have dimensions on the ports for each? Port opening...CC of the port...
Were the heads all ran on a motor or just the HPs?

[steve25]

Thanks for posting, and what's your plan for these heads?

I really wish you had the flow numbers for the Tigers @ .200" lift and the max port area for each head and the info of how many cid of a motor these heads where going on?


The flow numbers at .200" lift are just as important as max high lift when Exh scavenging depressions are added into the equation at overlap!

Looking at what you posted the PP heads will make for a nice gain in Hp over the high ports and the Tigers will do even better if there port area is not too much for your cid, but with the Tigers you will need a Carb of for example 1150 cfm or better if your had been running a 1050 type dominator.

Most motors that can breath deep enough to make over 1000 hp on a single Carb will gain 25 to 30 hp with duel Carbs on a Tunnel ram it seems.

Thanks again!

[PAUL K]

Do you have exhaust numbers?

[opeliac]

Ok, call me dumb...What are PP heads?

[mysticmissle]

pro port eheads

[slowbird]

Ex flow
.........hp / pp / tiger
.200 114 108 107
.300 157 159 148
.400 197 197 187
.500 228 227 221
.600 247 248 247
.700 255 259 263
.800 262 266 276
.900 267 271 284
1.00 270 275 290

Port opening
HP 2.62x1.48
PP 2.65x1.65
Tiger 2.70x1.60

[Scott Roberts]

Nice numbers...you have a lot tied up in those 3 sets of heads...

[PAUL K]

Nice numbers...the Tigers have the most power potential but the Pro-ports would be the best all around head. The Hi-ports will make big power also.

You get them at the neighborhood garage sale

[opeliac]

Who ported each set? Are they CNC'd, or hand ported?

[slowbird]

Originally Posted by PAUL K

Nice numbers...the Tigers have the most power potential but the Pro-ports would be the best all around head. The Hi-ports will make big power also.

You get them at the neighborhood garage sale

Not sure i agree with you on the pro ports, there is a reason they are no longer available imo.

[slowbird]

Originally Posted by opeliac

Who ported each set? Are they CNC'd, or hand ported?

Dan Barton ported all of them, mix of hand porting and cnc ported

[PAUL K]

Originally Posted by slowbird

Not sure i agree with you on the pro ports, there is a reason they are no longer available imo.

That's okay you don't have to agree with me. I just thought I'd let you know how they stack up.

[PAUL K]

Originally Posted by slowbird

Dan Barton ported all of them, mix of hand porting and cnc ported

Dan does good work!

[opeliac]

Based on those flow numbers...

In your opinions...Which heads would be better on a 480" turbo combo with a .650-.700 lift camshaft? Max power mindset.

[PAUL K]

Originally Posted by opeliac

Based on those flow numbers...

In your opinions...Which heads would be better on a 480" turbo combo with a .650-.700 lift camshaft? Max power mindset.

Hi-port head

[opeliac]

Originally Posted by PAUL K

Hi-port head

Why did you pick those?

[slowbird]

Originally Posted by PAUL K

Hi-port head

Agree

[slowbird]

Originally Posted by PAUL K

Dan does good work!

Yes he does!! One of the best imo!

[Scott Roberts]

Dan is a very sharp guy... he understands induction...