Prc 5.3 2.5 or PRC LS6 Stage III
#1
Prc 5.3 2.5 or PRC LS6 Stage III
Im looking at getting heads for my 346. The engine is basically stock except for Longtubes and Hooker exhaust. I have a T56 with 4.10's in the rear. I really like the 5.3's as they seem to be the best head for a stock displacment LS1. The LS6 stg III heads are intriguing due to their potential. I dont plan on building a bigger engine but who does; not at least until a rod comes to see the light of day. I would like to run a cam no bigger than a MS3 or 4, looking at Torquer 2s also. I really appreciate all of the help that the guys at Texas Speed give us and I want to built with all of their parts.
The car isnt daily driven but when I do drive it I want to be able to drive it like a daily driver(with understanding to a performance engine characticts).
The Ls6 heads might be little too big and that isnt really my style. I like tight engines that perform as they should and run smooth all the time. Im not looking for a huge dyno number as I could really care less about that and I know that unless I meet another modded LS1 or........? I will be able to pull him.
What are your opnions on this topic....Texas Speed guys feel free to comment.
I understand Engine performance to a high level but Im alittle rusty and new to this engine so I would appreciate any and all conversation.
Thanks
Search is a great tool but not much out there concerning 5.3 stg 2.5 vs LS6 Stg III.
The car isnt daily driven but when I do drive it I want to be able to drive it like a daily driver(with understanding to a performance engine characticts).
The Ls6 heads might be little too big and that isnt really my style. I like tight engines that perform as they should and run smooth all the time. Im not looking for a huge dyno number as I could really care less about that and I know that unless I meet another modded LS1 or........? I will be able to pull him.
What are your opnions on this topic....Texas Speed guys feel free to comment.
I understand Engine performance to a high level but Im alittle rusty and new to this engine so I would appreciate any and all conversation.
Thanks
Search is a great tool but not much out there concerning 5.3 stg 2.5 vs LS6 Stg III.
#4
Thanks guys.....Iv been lurking and reading quite some time now. Im really thinking a 5.3 head and torquer cam. I think that will make a very fun sunny day car. I think I have ruled out the LS6 Stg III but not the LS6 Stg I or II.
Tons of options.....in the long run any are better than what I have.
Keep the opnions coming...
Tons of options.....in the long run any are better than what I have.
Keep the opnions coming...
#5
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I currently have the Torquer v2 in my '98, and I just ordered the PRC Stage 1 LS6 heads from TSP yesterday, having them milled down to 62cc's. That's what Matt recommended (or not any lower at least), and that's what I was looking for. Should put me at 11:1 compression. Looking to put it into the low to mid 400's after the dyno tune.
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#9
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i have the 2.5 5.3's and torquer III and it performs as good as you can ask. Plenty of torque across the entire RPM band, which is really what you are looking for in a "fun to drive" car. Keep in mind most of it is in the tune though, as far as driveability goes. so whichever setup you go with, find a good tuner and he can probably make anything driveable.
#11
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i have TSP 5.3 stg 2.5 heads and torquer 2 cam along with the rest of the mods in sig, fun as hell to drive quick as **** it smoked our 12.5 @ 109 cutlass with the slicks on, on the back road and i was spinning them, wouldnt try running anybody from a 30 mph roll though it just blows them off and gets sideways with regular street shoes
Dont have any #s yet cause its in a vert (need a 6pt) and a i need something better than the 7.5 with slicks and a M6, im also running a mail order tune from them pretty good, but of course no way to get it perfect thru mail order but its close, need to get it on a dyno and tuned i can smell its rich, but that means im safe
Dont have any #s yet cause its in a vert (need a 6pt) and a i need something better than the 7.5 with slicks and a M6, im also running a mail order tune from them pretty good, but of course no way to get it perfect thru mail order but its close, need to get it on a dyno and tuned i can smell its rich, but that means im safe
Last edited by 98TA_vert; 02-03-2010 at 08:02 AM.
#12
TECH Addict
yeah i was wanting to know about the exact same comparison. i am really torn between the two sets of heads. i also want a torquer v2. maybe a v3 if i'm not gonna dd my car anymore. but i don't really see the point of milling ls6's if i can get the same cr out of the 5.3's.
oh hey 98 ta vert got any vids of your set up?
oh hey 98 ta vert got any vids of your set up?
#13
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yeah i was wanting to know about the exact same comparison. i am really torn between the two sets of heads. i also want a torquer v2. maybe a v3 if i'm not gonna dd my car anymore. but i don't really see the point of milling ls6's if i can get the same cr out of the 5.3's.
oh hey 98 ta vert got any vids of your set up?
oh hey 98 ta vert got any vids of your set up?
Last edited by 98TA_vert; 02-03-2010 at 06:26 PM.
#14
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i have tsp td's, got vids in my sig. i love them but honestly ide rather have the rumbler cat back. the td's hang down too much and are gonna get in the way of the torque arm i want.
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well didnt have a chance today to go out and tape, gotta work tomorrow and the weekend(shift work) and was helping my father-in-law change the buckets on his backhoes today, were supposed to get 1-2 feet of snow starting friday night, so I probably wont get a chance to take the car out on clean roads till early next week, oh yea my brother with the dv camera works for delaware highway dept. so he'll be at work probably from tomorrow morning till sunday or monday
Last edited by 98TA_vert; 02-04-2010 at 06:14 PM.
#17
TECH Resident
i have seen both heads at work...but in my opinion i would take the prc 2.5 ls6s.. i have seen better dyno numbers and better track times with ls6s, then the cars sporting the 5.3s..
#18
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The stage 3 heads are not what you'd want to run on a 346. If your looking for a max effort 346 head checkout the PRC 215 or PRC 227 aftermarket casting cylinder heads. These cylinder heads have the fastest h/c record at 9.66 & has proven to make big power numerous times.
If your looking for more of a budget minded setup the PRC Stage 2.5 LS6 heads would easily be the second best option behind the PRC castings. At just over $1400 the LS6 heads are pretty hard to beat for the $$$!!
If your looking for more of a budget minded setup the PRC Stage 2.5 LS6 heads would easily be the second best option behind the PRC castings. At just over $1400 the LS6 heads are pretty hard to beat for the $$$!!
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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