prc 2.5 5.3L vs stock 243's
#1
prc 2.5 5.3L vs stock 243's
i did quite a bit of searching and read a bunch of old threads comparing prc 5.3 vs prc ls6, but, never found the answer to my question.
i have a 98 t/a that i am about to put a TQV2 in. i have full bolts ons, SS3600, 125 wet shot.
i am looking at installing a set of heads to compliment the TQV2 that i will be installing. the car is a DD (but only like 5 miles per day) i was suggested from TSP to go with the prc 2.5 LS6 heads but im thinking i want to save a few dollars.
so i was wondering how much of a difference will there be between the PRC 2.5 5.3L heads versus a set of stock 243s??
i have a 98 t/a that i am about to put a TQV2 in. i have full bolts ons, SS3600, 125 wet shot.
i am looking at installing a set of heads to compliment the TQV2 that i will be installing. the car is a DD (but only like 5 miles per day) i was suggested from TSP to go with the prc 2.5 LS6 heads but im thinking i want to save a few dollars.
so i was wondering how much of a difference will there be between the PRC 2.5 5.3L heads versus a set of stock 243s??
#2
30rwhp would be my guess. I would go with TSPs recommendation for ported LS6s. If you're willing to spend an extra thousand for ported 5.3s over stock 243s go ahead and spend an extra couple of hundred for the better ones.
#4
LS1Tech Premium Sponsor
iTrader: (5)
The Stage 2.5 5.3's will be worth an easy 35-40rwhp over your stock LS1 heads, and about 25-30rwhp over a stock LS6 head.
__________________
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!
#6
LS1Tech Premium Sponsor
iTrader: (5)
They are very close in power. If it is for MY vehicle, I still like the Stage 1 LS6's over the 5.3's. The LS6's ports are laid out better in factory form (and that remains after porting) and make just a bit better power consistently.
__________________
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!
Trending Topics
#14
TECH Apprentice
iTrader: (6)
I love the 2.5s on mine. I got them from TSP through Lashway Motorsports milled to 62cc.
Combined with a TSP228R cam I put down 440rwhp. Considering the nice dual springs that come on it and the bump in compression they are a great choice for a budget build that will still make awesome power.
Combined with a TSP228R cam I put down 440rwhp. Considering the nice dual springs that come on it and the bump in compression they are a great choice for a budget build that will still make awesome power.
#15
11 Second Club
iTrader: (10)
Join Date: Mar 2006
Location: Hilliard fl.
Posts: 536
Likes: 0
Received 0 Likes
on
0 Posts
Proof the tsp 5.3 heads work 470 rwhp.With a ls6 intake wow.https://ls1tech.com/forums/generatio...ld-thread.html
#17
I Love my 2.5 5.3 heads. TSP milled them down to 61cc and w/ OEM headgasket I'm at 11.1 CR I gained 38rwhp and 30rwtq from the head swap alone. For the money with the dual springs and paired up to a small/mid size cam. The hp per dollar is a tough combo to beat.