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Ran 24-25 ish psi for years on the stocker...93/alky. New engine will be low 20s for starters
 
Not a good definition by any means but it is manifold pressure and nothing more than that. Mass flow is what's getting in.

I've been trying to explain this to my buddy for years. I keep telling him 25psi with my TE44 and stock heads isn't as hard on a motor as say 20psi with a 67 series or something with good heads but he thinks that the boost number is the end of a motor. FWIW, I run 25psi a lot but 20psi on street tires is enough to fry them on demand below 30-40mph so I run it there unless the Mickeys are on and then 25+ with TE44, single M15 alky, and stockish heads, mild flat tap cam.
 
30psi.jpg
 
damm no wonder guys running so much boost blow up there motors :D amazing what these little brutes will take !!
 
3 bar MAP. A nice straight line at 30.4psi

image-2726255435.jpg
 
29.4 is 3 bar. Actual was probably 32-33psi
 
I haven't really turned mine up.I was running 25 most of last year and saw 26 a couple of frames on power logger in BG.but that's one of the reasons my redneck built 109 is only running 9.70s in a 9.20 class.
 
ZNix said:
That is on 93 + Alky right? Or is that C16?

93/alky. The only thing I change for high octane is the timing and the target depending on the oxygen content of the fuel. I keep it rich. That's actually an old pic from a log from a 130mph pass with my blue car. That engine liked timing too. Way more timing than I run on an engine with a really good mass flow like the one in my black car.
 
Not that I want to turn it up that much because 25 is going to be a handful already, but would a set-up like mine be able to push 30 PSI at the track? Or would that be asking for a disaster? I think the 6131 would probably be about out of breath by then anyways. 93/Alky stock heads, cam, 980 springs, 6131 Turbo 3" DP, 42.5lb injectors, razor's alky.
 
My car is 22lbs on 93 Sunoco nooo alky . Have run as high as 29lbs on c16 iron headed 235ci with a gt42 r 76 billet wheel .i won't go pass 30 lb . I run BS3 computer. I run 24 to 25 lbs with torco in the tank on pump gas too.
 
Im at 26-27psi with a stock heads/cam long block, 128K on it; fed by a old school journal bearing Limit TE-62. Car still runs good. That's on 93/alchy. Have seen as much as 29psi on my logs from early last year.
 
ZNix said:
Not that I want to turn it up that much because 25 is going to be a handful already, but would a set-up like mine be able to push 30 PSI at the track? Or would that be asking for a disaster? I think the 6131 would probably be about out of breath by then anyways. 93/Alky stock heads, cam, 980 springs, 6131 Turbo 3" DP, 42.5lb injectors, razor's alky.
On a stock cammed/headed engine it will keep making power till you hit 52-53lbs/minute. Probably happen with boost in the
Low 30's. I don't rec anyone trying to run boost that high. You would probably need more spring Since the engine would pull to 5300-5400 if it had that much mass flow. I could convert that turbo to a 76 p trim and you could pick up a lot of potential mass flow if you do heads/cam/intercooler. You would likely be around 50lbs/min @28-30psi with your current setup. With the heads/cam/intercooler/76p you would be at 60lbs/min around 22-23psi and probably top out around 65lbs/min if you ran it around 26-27psi. That compressor is a gt35r and works really well on these engines around 2.5:1 PR. It never really got the credit it should have because it was often paired with a small turbine like yours so the potential could never be realized. Vendors pushed their own product rather than try to sell a turbo with the competitions compressor wheel. That compressor will support low 10 sec power. Even with a T350 turbine (aka6152) it will flow considerbly more than the small stage 3. the trade off is slower spoolup.
 
Before I finished my car I swore I was going to run no less that 25psi through it.

800 miles later it hasn't seen over 18 psi because i'm a complete weenie :(
 
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