[PAUL K]

Originally Posted by opeliac

Why did you pick those?

Not sure I want to go into a lot but detail but to be safe the Hi-port will have a more reliable valvetrain and has the best I/E ratio. I'm sure all three heads would have a ton of power potential.

[opeliac]

Originally Posted by PAUL K

Not sure I want to go into a lot but detail but to be safe the Hi-port will have a more reliable valvetrain and has the best I/E ratio. I'm sure all three heads would have a ton of power potential.

I'm actually looking for a pair of heads for my turbo car...So if you cant go into detail, who would you recommend that would?

[PAUL K]

Originally Posted by opeliac

I'm actually looking for a pair of heads for my turbo car...So if you cant go into detail, who would you recommend that would?

If you're considering using one of these three heads for your build, the Hi-port will be your best choice for your build. I doubt any of these three examples have been set-up for a power adder application.

[Scott Roberts]

Originally Posted by PAUL K

If you're considering using one of these three heads for your build, the Hi-port will be your best choice for your build. I doubt any of these three examples have been set-up for a power adder application.

I agree... Hi-ports will be your best option... PP's are expensive to build and tigers are not that power adder friendly.....from my personal experience..

[opeliac]

Originally Posted by PAUL K

If you're considering using one of these three heads for your build, the Hi-port will be your best choice for your build. I doubt any of these three examples have been set-up for a power adder application.

What makes the hi port the better choice? Do all three have comparable deck thickness? Material thickness in the valve train area?

[455firebird1969]

Originally Posted by 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

Nice collection you have there. I have a set of HP’s I had done by Dave Wilcox recently. We went for max power on E-85 and ability to run all season without maintenance, it’s for a bracket car. I thought it would make for a nice comparison.

.4- 291
.5- 344
.6- 385
.7- 409
.8- 414 .8- through the Northwind intake 398
.85- 414
.9- 408

We are planning on .800 lift SR 50MM cam, and about 480 CI, IAII-A Block. I went with the Northwind to run it under a flat hood on a 74 T/A with a shaker scoop. The plan is to bust some unsuspecting chebby butt at the local drag strip, or anywhere I take it.

[Scott Roberts]

Originally Posted by 455firebird1969

Nice collection you have there. I have a set of HP’s I had done by Dave Wilcox recently. We went for max power on E-85 and ability to run all season without maintenance, it’s for a bracket car. I thought it would make for a nice comparison.

.4- 291
.5- 344
.6- 385
.7- 409
.8- 414 .8- through the Northwind intake 398
.85- 414
.9- 408

We are planning on .800 lift SR 50MM cam, and about 480 CI, IAII-A Block. I went with the Northwind to run it under a flat hood on a 74 T/A with a shaker scoop. The plan is to bust some unsuspecting chebby butt at the local drag strip, or anywhere I take it.

I hope he wasn't going for max port..... I'm a fan of Dave as he has made big power for me for 20 years.... he took my 406 from 12.20's to 11.20's for $800 in 97.. then to 10's at 3150 lbs with a hyd. Roller..
If he went for max power, 414 isn't there.... ??
Then 6.40's with a shoe string budget...

[slowbird]

Originally Posted by opeliac

What makes the hi port the better choice? Do all three have comparable deck thickness? Material thickness in the valve train area?

The pro ports arent available anymore so those are eliminated, the Tiger heads are nice but cost more and in a turbo build i doubt they're worth the added expense. The HP heads are by far the cheaper option and paired with a turbo will make HUGE power.

[Stan Weiss]

Originally Posted by 455firebird1969

Nice collection you have there. I have a set of HP’s I had done by Dave Wilcox recently. We went for max power on E-85 and ability to run all season without maintenance, it’s for a bracket car. I thought it would make for a nice comparison.

.4- 291
.5- 344
.6- 385
.7- 409
.8- 414 .8- through the Northwind intake 398
.85- 414
.9- 408

We are planning on .800 lift SR 50MM cam, and about 480 CI, IAII-A Block. I went with the Northwind to run it under a flat hood on a 74 T/A with a shaker scoop. The plan is to bust some unsuspecting chebby butt at the local drag strip, or anywhere I take it.

Would you happen to have the .2 and .3 flow numbers? Also what size intake valve?

Thanks,
Stan

[455firebird1969]

Originally Posted by Scott Roberts

I hope he wasn't going for max port..... I'm a fan of Dave as he has made big power for me for 20 years.... he took my 406 from 12.20's to 11.20's for $800 in 97.. then to 10's at 3150 lbs with a hyd. Roller..
If he went for max power, 414 isn't there.... ??
Then 6.40's with a shoe string budget...

He gave me what I asked for, which was a compromise. Given the restraints of 14/1 and low maintenance so I can run a couple hundred passes a season without having to worry about reliability, we ended up targeting .800 lift. He said they sounded sweet on the bench. I’m confident they will deliver.

[Dragncar]

Originally Posted by 455firebird1969

He gave me what I asked for, which was a compromise. Given the restraints of 14/1 and low maintenance so I can run a couple hundred passes a season without having to worry about reliability, we ended up targeting .800 lift. He said they sounded sweet on the bench. I’m confident they will deliver.

Are those High Ports std pushrod, no offset shafts and lifters ? If they are then 414 is about as high as I have seen on a std pushrod High Port.

[steve25]

I got to say that for a high heat Exh motor like a turbo set up I would want a Exh port lay out like a RAV head and such.

[PAUL K]

Originally Posted by opeliac

What makes the hi port the better choice? Do all three have comparable deck thickness? Material thickness in the valve train area?

Originally Posted by slowbird

The pro ports arent available anymore so those are eliminated, the Tiger heads are nice but cost more and in a turbo build i doubt they're worth the added expense. The HP heads are by far the cheaper option and paired with a turbo will make HUGE power.

X 2

[grandville455]

Nice!! What's the Minimum CSA in the Head?

[PAUL K]

Originally Posted by grandville455

Nice!! What's the Minimum CSA in the Head?

About "yeah" big 🤣🤣🤣

[slowbird]

Originally Posted by grandville455

Nice!! What's the Minimum CSA in the Head?

All I'll say is min csa is at valves

[PAUL K]

Originally Posted by grandville455

Nice!! What's the Minimum CSA in the Head?

Originally Posted by PAUL K

About "yeah" big 🤣🤣🤣

Originally Posted by slowbird

All I'll say is min csa is at valves

Told ya!

[Stan Weiss]

Originally Posted by slowbird

All I'll say is min csa is at valves

Brian,
That is interesting. I have never worked on a head where the throat was not smaller than the valve.

Stan

[slowbird]

Originally Posted by Stan Weiss

Brian,
That is interesting. I have never worked on a head where the throat was not smaller than the valve.

Stan

Sorry it is the throat, didn't think people would take the "at the valves" literally lol

[slowbird]

Originally Posted by 455firebird1969

Nice collection you have there. I have a set of HP’s I had done by Dave Wilcox recently. We went for max power on E-85 and ability to run all season without maintenance, it’s for a bracket car. I thought it would make for a nice comparison.

.4- 291
.5- 344
.6- 385
.7- 409
.8- 414 .8- through the Northwind intake 398
.85- 414
.9- 408

We are planning on .800 lift SR 50MM cam, and about 480 CI, IAII-A Block. I went with the Northwind to run it under a flat hood on a 74 T/A with a shaker scoop. The plan is to bust some unsuspecting chebby butt at the local drag strip, or anywhere I take it.

What are your performance/horespower goals? How many runs do you make in a year (just wondering how many runs it needs to go before maintenance)?