Texas Speed (PRC) 5.3L stage 2.5 heads -- what cam?
06-18-2007, 10:40 AM
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Originally Posted by ls1 1990 VN
This is what i'm talking about 65.8cc whats this crap, mine are 67cc these are meant to be 59cc. like i said you get what you pay for.
06-18-2007, 11:32 AM
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Originally Posted by jimmypop13
I had my heads milled to 61cc during a Texas Speed group purchase at no additional cost. Just talk to Jason, he may be able to hook you up too
06-19-2007, 06:23 PM
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best bang for the buck cylinder heads https://ls1tech.com/forums/showthrea...8&page=2&pp=20
The general consensus seems to be that there are many budget cylinder heads that are great:
-TSP/PRC
-Patriot
-TEA
-Dart
-Livernois
AFR and ETP seem to be for those on less of a budget.
The general consensus seems to be that there are many budget cylinder heads that are great:
-TSP/PRC
-Patriot
-TEA
-Dart
-Livernois
AFR and ETP seem to be for those on less of a budget.
06-19-2007, 06:32 PM
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ls7 lifters - yes or no? Should I go with LS7 lifters? I saw a brand new set of 16 on eBay for about $160/shipped. Is replacing the lifters recommended on a car with 57,000 miles?
06-19-2007, 09:41 PM
#69
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Buddy just finished build stock bottom end, full bolt-ons, electric waterpump, fast 90/90, underdrive, TSP PRC 5.3stg 2.5, and G5X3 cam 491rwhp. This car pulls freaking amazing in the top end. They did have to fly cut even though it says the G5X3 specs will clear, they won't.
Same car on 100 shot went 10.91 at 131mph in Noble, then kicked out because of no cage
I have the same heads w/ .040 cometics, w/ 228/228 .588/.588 cam, stock ls1 intake, TB, and internals, only exhaust, lid, MAF. streetability is great, no surging, i can thank most of that to a good tune. No dyno yet but testing it against other cars somewhere about 405-410rwhp.
Same car on 100 shot went 10.91 at 131mph in Noble, then kicked out because of no cage
I have the same heads w/ .040 cometics, w/ 228/228 .588/.588 cam, stock ls1 intake, TB, and internals, only exhaust, lid, MAF. streetability is great, no surging, i can thank most of that to a good tune. No dyno yet but testing it against other cars somewhere about 405-410rwhp.
06-19-2007, 10:18 PM
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Originally Posted by PIMP_2
Buddy just finished build stock bottom end, full bolt-ons, electric waterpump, fast 90/90, underdrive, TSP PRC 5.3stg 2.5, and G5X3 cam 491rwhp. This car pulls freaking amazing in the top end.
06-20-2007, 02:39 AM
#71
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E-mailed Trevor @ TSP about my heads, wow! if i send them back to them from NZ at my cost they will mill them back to 62cc which the 5.3 is meant to be, updated valve job etc and return to me in NZ at their cost. i'm flabergasted 
06-20-2007, 05:41 PM
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Originally Posted by PIMP_2
Buddy just finished build stock bottom end, full bolt-ons, electric waterpump, fast 90/90, underdrive, TSP PRC 5.3stg 2.5, and G5X3 cam 491rwhp. This car pulls freaking amazing in the top end. They did have to fly cut even though it says the G5X3 specs will clear, they won't.
Same car on 100 shot went 10.91 at 131mph in Noble, then kicked out because of no cage
I have the same heads w/ .040 cometics, w/ 228/228 .588/.588 cam, stock ls1 intake, TB, and internals, only exhaust, lid, MAF. streetability is great, no surging, i can thank most of that to a good tune. No dyno yet but testing it against other cars somewhere about 405-410rwhp.
Same car on 100 shot went 10.91 at 131mph in Noble, then kicked out because of no cage
I have the same heads w/ .040 cometics, w/ 228/228 .588/.588 cam, stock ls1 intake, TB, and internals, only exhaust, lid, MAF. streetability is great, no surging, i can thank most of that to a good tune. No dyno yet but testing it against other cars somewhere about 405-410rwhp.
06-21-2007, 12:28 PM
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Originally Posted by ls1 1990 VN
E-mailed Trevor @ TSP about my heads, wow! if i send them back to them from NZ at my cost they will mill them back to 62cc which the 5.3 is meant to be, updated valve job etc and return to me in NZ at their cost. i'm flabergasted
06-21-2007, 05:45 PM
#75
I would put the new 2.5 5.3l cylinder heads up against ANY stock casting cylinder heads on the market! I could tell you guys several stories where customers have replaced the stage 2.5 cylinder heads with aftermarket casting big money cylinder heads for next to no hp gains!
With our complete cnc porting & cnc valve job process our cylinder heads are one of the most consistant cylinder heads available! It's no wonder the PRC cylinder heads consitantly kick the crap out of the competitors stock castings, PRC uses the same cnc porting machines & cnc valve job machines as AFR uses but in a cylinder head costing half the money!
Our cnc process gives us the ability to keep valve jobs identical within .0004" and reproduce each port consistantly with virtually no runout!
With our complete cnc porting & cnc valve job process our cylinder heads are one of the most consistant cylinder heads available! It's no wonder the PRC cylinder heads consitantly kick the crap out of the competitors stock castings, PRC uses the same cnc porting machines & cnc valve job machines as AFR uses but in a cylinder head costing half the money!
Our cnc process gives us the ability to keep valve jobs identical within .0004" and reproduce each port consistantly with virtually no runout!
__________________
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
06-21-2007, 05:56 PM
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Originally Posted by chae
May go with a Racetronix fuel pump and wiring harness for $225 instead of the Wlabro 255lph fuel pump. Any opinions?
06-21-2007, 06:13 PM
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Originally Posted by Jason 98 TA
I would put the new 2.5 5.3l cylinder heads up against ANY stock casting cylinder heads on the market! I could tell you guys several stories where customers have replaced the stage 2.5 cylinder heads with aftermarket casting big money cylinder heads for next to no hp gains!
With our complete cnc porting & cnc valve job process our cylinder heads are one of the most consistant cylinder heads available! It's no wonder the PRC cylinder heads consitantly kick the crap out of the competitors stock castings, PRC uses the same cnc porting machines & cnc valve job machines as AFR uses but in a cylinder head costing half the money!
Our cnc process gives us the ability to keep valve jobs identical within .0004" and reproduce each port consistantly with virtually no runout!
With our complete cnc porting & cnc valve job process our cylinder heads are one of the most consistant cylinder heads available! It's no wonder the PRC cylinder heads consitantly kick the crap out of the competitors stock castings, PRC uses the same cnc porting machines & cnc valve job machines as AFR uses but in a cylinder head costing half the money!
Our cnc process gives us the ability to keep valve jobs identical within .0004" and reproduce each port consistantly with virtually no runout!
Last edited by chae; 07-01-2007 at 10:45 PM.
06-21-2007, 06:16 PM
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Originally Posted by deeloc1
Racetronix sales the walbro pump with their harness...just bought my harness and GSS340M (GN Pump), which is the 255lph pump, last week. If you check their website you will see that they use Walbro pumps.
The Racetronix F-LS1 pump assembly is based on Walbro gerotor pump technology utilizing the most powerful armature and gear set currently available. Walbro has set the industry standard in high-performance in-tank pumps. Walbro pumps are QS9000 certified and are used as OE equipment in many production performance vehicles such as the C5 Corvette. Walbro's gerotor design is able to maintain high pressures while providing high volumes as well. This is done by squeezing the fuel out between two gears instead of pushing it like most factory vane pumps do. (i.e. factory F-LS1 pump). This positive displacement design makes high-performance Walbro pumps small, light weight, quiet, efficient and reliable. Tests in the field have proven the Racetronix F99+ system will support upwards of 600RWHP and 700RWTQ in some applications.
06-23-2007, 11:42 PM
#80
Originally Posted by chae
Should I go with an LS7 clutch to handle this kind of power or should I opt for a Spec Stage 3? If neither, please specify your recommendation.
I don't know how it will do with my new setup.
It was fine with the 5.7.