TSP / PRC 265cc LS7 Heads for min 4.060 bore
02-29-2012, 11:20 PM
#1
TSP / PRC 265cc LS7 Heads for min 4.060 bore Time to do WURK!
Can’t say enough about these heads! If you didn’t know! Then you need to know! These are the new LS7 heads for 4.060 bore (min.) engines! They are not small bore they still utilize ls7 stock valve sizing and flow close to 400 cfm! They are also 6 bolt and feature ¾” deck. These came built to the hilt from TSP they feature:
265cc Intake Ports
2.20-Inch Titanium Intake Valve
1.61-Inch Stainless Steel Exhaust Valve
PRC .700' Dual Valve Spring Kit
The Springs were setup and verified by TSP to be installed at 1.8" installed height.
1.080"-coil bind + lift .657 + .060 from coil bind is 1.797".
The .700 lift springs are rated at 160@1.850so they shim them .050
Packaged perfectly! Love at first sight!
Mmmmmm CNC chambers! Please not this is how a properly ported head is supposed to look! NO CHISEL PORTING HERE!
Intake side
Exhaust side
The whole shebang!
6 bolt provision and you can see the difference in spring height from ex. To int.
Per TSP recommendations and the way the heads are setup you are only able to run GM LS7 rocker arms which is perfectly fine just make sure you do a trunion upgrade
Deck Measurement! The beefier the better!
Went with GM LS9 7 layer MLS Gasket! These have done great on several high HP builds and look to be a lot better than normal cometics. These will be installed dry (no copper coating.) these gaskets are 0.051-inch thickness which will put my Cr around 11.1 perfect for boost and e85!
Looks good!
Can’t say enough about these heads! If you didn’t know! Then you need to know! These are the new LS7 heads for 4.060 bore (min.) engines! They are not small bore they still utilize ls7 stock valve sizing and flow close to 400 cfm! They are also 6 bolt and feature ¾” deck. These came built to the hilt from TSP they feature:
265cc Intake Ports
2.20-Inch Titanium Intake Valve
1.61-Inch Stainless Steel Exhaust Valve
PRC .700' Dual Valve Spring Kit
The Springs were setup and verified by TSP to be installed at 1.8" installed height.
1.080"-coil bind + lift .657 + .060 from coil bind is 1.797".
The .700 lift springs are rated at 160@1.850so they shim them .050
Packaged perfectly! Love at first sight!
Mmmmmm CNC chambers! Please not this is how a properly ported head is supposed to look! NO CHISEL PORTING HERE!
Intake side
Exhaust side
The whole shebang!
6 bolt provision and you can see the difference in spring height from ex. To int.
Per TSP recommendations and the way the heads are setup you are only able to run GM LS7 rocker arms which is perfectly fine just make sure you do a trunion upgrade
Deck Measurement! The beefier the better!
Went with GM LS9 7 layer MLS Gasket! These have done great on several high HP builds and look to be a lot better than normal cometics. These will be installed dry (no copper coating.) these gaskets are 0.051-inch thickness which will put my Cr around 11.1 perfect for boost and e85!
Looks good!
02-29-2012, 11:40 PM
#3
03-01-2012, 09:13 AM
#7
Great pics! Glad you like them! The exhaust valve is actually a 1.59". Sorry for the confusion on that!!
__________________
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
Trending Topics
03-01-2012, 10:29 AM
#10
Will check that out right now!!
__________________
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
03-01-2012, 06:24 PM
#11
03-02-2012, 12:00 PM
#15
03-02-2012, 06:11 PM
#16
