PRC 237cc Specs / Flow / Pics INSIDE!!
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From: Texas!
PRC 237cc Specs / Flow / Pics INSIDE!! We're pleased to announce the PRC casting is just about complete & here's a teaser pic of the all new 237cc casting cnc ported & ready for install on a customers 408 iron block!
The 237cc port is a supersized version of the 215cc cylinder head that recently claimed the quickest heads cam record!! The 237cc port is designed for customers with 4"+ bore applications looking for a max effort cathedral port cylinder head!
The 237cc cylinder head ships with the following:
Flow Data:
Lift Intake Exhaust
.100" 66 cfm 57 cfm
.200" 147 cfm 117 cfm
.300" 225 cfm 170 cfm
.400" 284 cfm 206 cfm
.500" 325 cfm 227 cfm
.600" 334 cfm 235 cfm
.650" 339 cfm 241 cfm
More info available at:
http://www.texas-speed.com/shop/item...d=992&catid=20
Preordering for 215, 227 & 237cc versions available with estimated ship time of mid Jan.
The 237cc port is a supersized version of the 215cc cylinder head that recently claimed the quickest heads cam record!! The 237cc port is designed for customers with 4"+ bore applications looking for a max effort cathedral port cylinder head!
The 237cc cylinder head ships with the following:
- 2.100" Stainless Intake Valves
- 1.600" Stainless Exhaust Valves
- PRC Double Spring Kit (.650" Lift)
- 68cc CNC Machined Chambers
- Provisions for Stock Rocker Arms or Aftermarket Rockers
- Increased valve cover clearance for aftermarket rocker systems
- Thick Deck for better sealing in power adder applications
- 6 bolt option standard for LSx blocks!
- .700" Valve Spring Upgrade Available!!
Flow Data:
Lift Intake Exhaust
.100" 66 cfm 57 cfm
.200" 147 cfm 117 cfm
.300" 225 cfm 170 cfm
.400" 284 cfm 206 cfm
.500" 325 cfm 227 cfm
.600" 334 cfm 235 cfm
.650" 339 cfm 241 cfm
More info available at:
http://www.texas-speed.com/shop/item...d=992&catid=20
Preordering for 215, 227 & 237cc versions available with estimated ship time of mid Jan.
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
That's a great price for a 6 bolt head. Are these 15* heads or are the valve angles altered? On the .700 lift springs are they still a 1.290-1.300ish spring diameter? What springs are they?
EDIT: I also noticed that you have the 215cc head on your site twice. I'm guessing that one of them was meant to be the 227cc since you have the 237cc head on there.
Double Edit: If I wanted to set these up with adjustable rockers would they necesitate a special rocker or could I use an off the shelf T&D, Jesel, Comp, etc...?
EDIT: I also noticed that you have the 215cc head on your site twice. I'm guessing that one of them was meant to be the 227cc since you have the 237cc head on there.
Double Edit: If I wanted to set these up with adjustable rockers would they necesitate a special rocker or could I use an off the shelf T&D, Jesel, Comp, etc...?
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Working on checking several different aftermarket rockers, I'll let you know. I would seriously doubt the standard aftermarket rockers wouldn't fit. The new valve spring is a little bit larger than the standard 1.29" springs we're use to seeing, but it's big heavy valve friendly so the LS7/LS3 guys should be really happy!! 
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
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I'm guessing that since it's possible(though not recommended) to use the stock rocker arms that the valve angle has not been changed from stock. I'm curious to see the answer of this question myself.
These are 13º valve angle.
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ET 11 degree heads also can use stock rockers. The thing is valve guide wear is increased with stock rockers. The reason we went closer 13 degrees is it still allows us a reasonable valve length for weight issues, yet it helped to free up needed p/v so we can offer smaller chambers to those big camshaft guys!!
The cylinder head isn't limited to 13 degrees though, we have options to change this up down the road if we decide to go a different direction.
The cylinder head isn't limited to 13 degrees though, we have options to change this up down the road if we decide to go a different direction.
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
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From: Texas!
Not it's a traditional style port.
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
These heads work very well with a ported FAST
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COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
Texas Speed: I tried asking a few questions on the phone earlier but didnt have all the info I was looking for.
A few questions:
1) Flow sheet for the 215cc and 227cc heads?
2) Alot of people looking to run the 237cc version will be doing so on a 4.125"+ bore builds. Can you flow these on a larger bore and put out a flow sheet?
3) Can you give the open/close seat pressure and spring diameter on the .700 lift spring setup?
4) Whats the valve diameter/specs standard? Will these accept only your valves or will they work with a standard LS1 spec intake/exhaust valve in the correct diameter. (If I am wanting to source custom valves for say an Inconel setup etc)
A few questions:
1) Flow sheet for the 215cc and 227cc heads?
2) Alot of people looking to run the 237cc version will be doing so on a 4.125"+ bore builds. Can you flow these on a larger bore and put out a flow sheet?
3) Can you give the open/close seat pressure and spring diameter on the .700 lift spring setup?
4) Whats the valve diameter/specs standard? Will these accept only your valves or will they work with a standard LS1 spec intake/exhaust valve in the correct diameter. (If I am wanting to source custom valves for say an Inconel setup etc)
Texas Speed: I tried asking a few questions on the phone earlier but didnt have all the info I was looking for.
A few questions:
1) Flow sheet for the 215cc and 237cc heads?
2) Alot of people looking to run the 237cc version will be doing so on a 4.125"+ bore builds. Can you flow these on a larger bore and put out a flow sheet? We'll work on getting them flowed on the larger bore after PRI.
3) Can you give the open/close seat pressure and spring diameter on the .700 lift spring setup? These will be very close to the final specs. We are expecting a truck load shipment of the springs today! 160# @ 1.850" and 435# @ 1.150". Coil bind ~ 1.100".
4) Whats the valve diameter/specs standard? Will these accept only your valves or will they work with a standard LS1 spec intake/exhaust valve in the correct diameter. (If I am wanting to source custom valves for say an Inconel setup etc) 1.351" OD of outer spring, .726" ID of inner spring
A few questions:
1) Flow sheet for the 215cc and 237cc heads?
2) Alot of people looking to run the 237cc version will be doing so on a 4.125"+ bore builds. Can you flow these on a larger bore and put out a flow sheet? We'll work on getting them flowed on the larger bore after PRI.
3) Can you give the open/close seat pressure and spring diameter on the .700 lift spring setup? These will be very close to the final specs. We are expecting a truck load shipment of the springs today! 160# @ 1.850" and 435# @ 1.150". Coil bind ~ 1.100".
4) Whats the valve diameter/specs standard? Will these accept only your valves or will they work with a standard LS1 spec intake/exhaust valve in the correct diameter. (If I am wanting to source custom valves for say an Inconel setup etc) 1.351" OD of outer spring, .726" ID of inner spring
__________________
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
Sound good. Give me a call when you're ready!
__________________
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!