I just took it to the track where all I could muster was a 13.3 @ 107mph. I am not worried about the 13.3 b/c I was on street tires and the track wasn't sticking. I was using the 108 chip with 93/110 mix and alky, only 2* knock at the most on the shifts, the o2s were about 780-800 at the end with the fp at being at 42 for 1 run and 45 for another (both netted same mph) all this with 21psi. My question is where is the sweet spot for this turbo and what stall would work best for it?
A few questions about the PT51
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Mile Hi GN
Member
- Joined
- May 23, 2001
- Messages
- 184
51 here
The 51 is the same turbo as a 44 except for the turbine wheel, fewer fins, different pitch. The theory is comparable spool as the 44 (via design) with less exhaust back pressure down at the big end.
I get by with a 2800 stall with my PTE-51/.63 but that's with heads, cam, V-4, etc. Stock heads, intercooler, likely need a little more stall. Some can get by with the stock D5, but not many.
Joe Lubrant suggested the 26/26 "thang" for this turbo on pure race gas at the track. 26 degrees of timing, 26 pounds of boost.
I'm still walking my way up to those settings.
The 51 is the same turbo as a 44 except for the turbine wheel, fewer fins, different pitch. The theory is comparable spool as the 44 (via design) with less exhaust back pressure down at the big end.
I get by with a 2800 stall with my PTE-51/.63 but that's with heads, cam, V-4, etc. Stock heads, intercooler, likely need a little more stall. Some can get by with the stock D5, but not many.
Joe Lubrant suggested the 26/26 "thang" for this turbo on pure race gas at the track. 26 degrees of timing, 26 pounds of boost.
I'm still walking my way up to those settings.
REDS HOT AIR
Buick Tweaker
- Joined
- May 24, 2001
- Messages
- 3,433
im with that statement ...2800 stall if you got motor ...stock motor may want a couple hundred more.
personally mine spooled good on the d5 converter and spooled real good with a 11-9 converter from Bruce with 2800 stall.
26 timing and 26# is what mine was set to and holy cow it pulled crazy hard. that was on strait vp 116 fuel
if you add the 26/26 to it and got heads,cam and other stuff..have fun while it last.
btw i was looking to go 124 in that trim.
personally mine spooled good on the d5 converter and spooled real good with a 11-9 converter from Bruce with 2800 stall.
26 timing and 26# is what mine was set to and holy cow it pulled crazy hard. that was on strait vp 116 fuel
if you add the 26/26 to it and got heads,cam and other stuff..have fun while it last.
btw i was looking to go 124 in that trim.
