Guess i will chime in here too.
Anyone here read the GS-XTRA? Anyone see the turbo regal with the heads and intake never off running 10.9 with a ta-49 turbo?
Anyone read Ed Brewers threads here running 11.31 with a stock turbo,heads NEVER off,133K full weight car? 25 or 26psi of boost on meth
Anyone read about Neil Werner running 11.08@ 121 and change with a 51, powerstroke frontmount, heads never off, lower intake never ported, full weight car? 25 psi of boost on racegas
I will tell you this, when i had my TE44 on my car i was running 31-32 PSI of boost 18° of timing with a raceweight of 3780, running 11.19 at 120ish with a 1.58 sixty foot.
Bolted the PTE-54 and went slower
car would only go 11.4s at 116.
I dont know why it was slowing down with the larger turbo, i had a locked convertor, 28 inch slicks, and race gas. Nothing else changed other than turbo.
My opinion is this:
A small combo such as the 49,44,51 and 52 turbos tuned correctly with a lockup convertor,28 inch tall tires and a excellent 60 foot with stock heads seems to be the ticket. As long as you have the supporting mods to make it run lower 11s high 10s....
If some are getting away with a ta49 running high 10s, then i wonder what that same car would run with a 61 or 62?
What i dont get is the dead ringers running mid 11s on a stock turbo, and other cars running mid 12s with upgraded turbos and heads.
If your car doesnt run low 12s with the stock turbo, then dont upgrade to a 44 and expect it to run low 11s....
Everyone needs to get the car properly tuned, engine, transmission, and rear suspension before adding extensive mods that could slow them down.
Guess thats why i am running TFS this year with a stock turbo and IC, just want the car to run mid 11s with a 1.45-1.55 sixty foot before i add a 44 to it and see what the car has.
P.S.
Porting the lower intake will get you 2 tenths and 1 mph
Good luck