CR List: Post up your FI CR
04-21-2010, 03:30 AM
#1
CR List: Post up your FI CR
Thought it would be interesting to see what kind of compression ratio's people are running with their boosted set-ups. Please list the following...
Compression Ratio:
Motor/Displacement:
Amount of Boost:
Type of FI:
Meth Yes or No:
Max Power:
Verdict:
Compression Ratio:
Motor/Displacement:
Amount of Boost:
Type of FI:
Meth Yes or No:
Max Power:
Verdict:
04-21-2010, 03:33 AM
#2
I'll go first! 
Compression Ratio: 8.7:1
Motor/Displacement: Forged 370
Amount of Boost: max of 17lbs
Type of FI: STS turbo, GT-76
Meth Yes or No: Yes
Max Power: 680rwhp/720rwtq
Verdict: Out of boost the motor was a dog but once it saw a healthy dose of boost the motor really came into it's own and was awesome.
Compression Ratio: 8.7:1
Motor/Displacement: Forged 370
Amount of Boost: max of 17lbs
Type of FI: STS turbo, GT-76
Meth Yes or No: Yes
Max Power: 680rwhp/720rwtq
Verdict: Out of boost the motor was a dog but once it saw a healthy dose of boost the motor really came into it's own and was awesome.
04-21-2010, 09:14 AM
#3
Compression Ratio: 9.7:1
Motor/Displacement: Forged 370 iron block
Amount of Boost: 11lbs
Type of FI: PDSC / Kenne Bell 2.8L
Meth Yes or No: No
Max Power: ??? (636whp calculated from 1/4 times)
Verdict: runs very well off-boost. Still able to run 20* timing in boost on 93 oct E10 with no KR.
Motor/Displacement: Forged 370 iron block
Amount of Boost: 11lbs
Type of FI: PDSC / Kenne Bell 2.8L
Meth Yes or No: No
Max Power: ??? (636whp calculated from 1/4 times)
Verdict: runs very well off-boost. Still able to run 20* timing in boost on 93 oct E10 with no KR.
04-21-2010, 09:26 AM
#4
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Compression Ratio:8.5:1
Motor/Displacement:364
Amount of Boost:15-20 psi
Type of FI:twin 76mm turbo
Meth Yes or No:yes
Max Power:unsure
Verdict: went 10.4@132, motor is dog out of boost, but never stops pulling up top.
Motor/Displacement:364
Amount of Boost:15-20 psi
Type of FI:twin 76mm turbo
Meth Yes or No:yes
Max Power:unsure
Verdict: went 10.4@132, motor is dog out of boost, but never stops pulling up top.
04-21-2010, 09:47 AM
#5
Compression Ratio: 9.9:1 (stock L33)
Motor/Displacement: 5.3L(stock L33) LPE GT2-3
Amount of Boost: ~12lbs/2.9" pulley
Type of FI: Modified Rooots (TVS MP1900) + 75hp jet N20
Meth Yes or No: Yes
Max Power: 626hp
Verdict: What works for one may not necessarily work for another. The sum of all parts is greater than the individual parts combined.
Motor/Displacement: 5.3L(stock L33) LPE GT2-3
Amount of Boost: ~12lbs/2.9" pulley
Type of FI: Modified Rooots (TVS MP1900) + 75hp jet N20
Meth Yes or No: Yes
Max Power: 626hp
Verdict: What works for one may not necessarily work for another. The sum of all parts is greater than the individual parts combined.
Last edited by trever1t; 04-21-2010 at 10:09 AM. Reason: added cam info
04-21-2010, 10:02 AM
#6
Compression Ratio: 10.9:1
Motor/Displacement: Stock LS2 with small cam (212/218 .590 115)
Amount of Boost: ~7.5 psi
Type of FI: Magna TVS1900 w/ 3.0 pulley
Meth Yes or No: None
Max Power: never dynoed
Verdict: Runs great. TVS loves the higher compression of the LS2. Really roars through the upper rpms.
Motor/Displacement: Stock LS2 with small cam (212/218 .590 115)
Amount of Boost: ~7.5 psi
Type of FI: Magna TVS1900 w/ 3.0 pulley
Meth Yes or No: None
Max Power: never dynoed
Verdict: Runs great. TVS loves the higher compression of the LS2. Really roars through the upper rpms.
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04-21-2010, 07:13 PM
#8
Compression Ratio: 8.65:1
Motor/Displacement: 408ci
Amount of Boost: 14-22psi
Type of FI: Uh, EFI? (check the screen name)
Meth Yes or No: Yep. Lots of it.
Max Power: Too much for the street - north of 1000rwhp at max boost. In DD trim, it was in the 800rwhp range
Verdict: I had no problems at this CR. Plenty of torque - even with the 80E and a relatively low stall. That said, I may increase the CR when I put it back together this summer. Still undecided if I want to drop 800 for .5 or 1 CR
Motor/Displacement: 408ci
Amount of Boost: 14-22psi
Type of FI: Uh, EFI? (check the screen name
)Meth Yes or No: Yep. Lots of it.
Max Power: Too much for the street - north of 1000rwhp at max boost. In DD trim, it was in the 800rwhp range
Verdict: I had no problems at this CR. Plenty of torque - even with the 80E and a relatively low stall. That said, I may increase the CR when I put it back together this summer. Still undecided if I want to drop 800 for .5 or 1 CR
04-21-2010, 07:15 PM
#9
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Compression Ratio:9.2:1
Motor/Displacement:408
Amount of Boost:???
Type of FI:KBracing pt88 or gt91
Meth Yes or No:doubt it
Max Power:???
Verdict: still trying to get it together
Motor/Displacement:408
Amount of Boost:???
Type of FI:KBracing pt88 or gt91
Meth Yes or No:doubt it
Max Power:???
Verdict: still trying to get it together
