Forged Performance: FP S1 Shortblock TT Results
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From: Atlanta, Ga
Forged Performance: FP S1 Shortblock TT Results
Yesterday we had a customer make the drive from Indiana to our location for a complete Forged Performance calibration using the Haltech ECU. The car was strapped to our Dyno Dynamics Dyno and Sharif went to work. With nothing but start up time on the engine, Sharif also performed a 2hr steady state loaded engine break using our dyno. One of the greatest benefits of the Dyno Dynamics is the ability to steady state tune and perform engine break in before the car ever leaves the shop. This car came to us with the following modifications:
• Forged Performance short block
• ARP L19 head studs
• HKS head gasket
• Cosworth heads
• Supertech billet lifters
• Brian Crower stage 2 cams
• Cosworth intake manifold
• GTM stage 2 turbo kit with GT2871 turbos
• Greddy Evo TT exhaust with restrictions removed
• Haltech ECU
• Innovate dual wideband air fuel meter
• HKS 1000cc injectors
• CJM twin pump unit
• Koyo racing radiator
• Setrab oil cooler
• Stillen high capacity oil pan
• ATS Carbonetic triple disk carbon clutch
Final numbers were 517 HP 410 TQ @ 17psi using 93 octane pump gas. He will be returning soon for an E-85 tune and more boost, which should be very interesting.
• Forged Performance short block
• ARP L19 head studs
• HKS head gasket
• Cosworth heads
• Supertech billet lifters
• Brian Crower stage 2 cams
• Cosworth intake manifold
• GTM stage 2 turbo kit with GT2871 turbos
• Greddy Evo TT exhaust with restrictions removed
• Haltech ECU
• Innovate dual wideband air fuel meter
• HKS 1000cc injectors
• CJM twin pump unit
• Koyo racing radiator
• Setrab oil cooler
• Stillen high capacity oil pan
• ATS Carbonetic triple disk carbon clutch
Final numbers were 517 HP 410 TQ @ 17psi using 93 octane pump gas. He will be returning soon for an E-85 tune and more boost, which should be very interesting.
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the trq is low cuz the turbos spool kinda late. Reminds me of my original haltech tune.That trq curve is nice and broad so it should be great once in the powerband.
What you should do some quick logs of your boost curve. Super easy on the haltech.
Log 3x 3rd gear pulls from 2000rpm until redline on a flat or slightly uphill road. try to do all 3 pulls on the same section of road and make sure to do at least 3 without turning the car off.
then just double check that every logged boost curve looks like the one in the dyno. The boost should be pretty similar, ie 16psi at 5250, etc etc...
The parts list looks good on paper. Hopefully those heads arent slowing exhaust velocity down too much, which would also kill spool.
What you should do some quick logs of your boost curve. Super easy on the haltech.
Log 3x 3rd gear pulls from 2000rpm until redline on a flat or slightly uphill road. try to do all 3 pulls on the same section of road and make sure to do at least 3 without turning the car off.
then just double check that every logged boost curve looks like the one in the dyno. The boost should be pretty similar, ie 16psi at 5250, etc etc...
The parts list looks good on paper. Hopefully those heads arent slowing exhaust velocity down too much, which would also kill spool.
Nice build. You could nearly eat off that engine bay!
It is interesting how low your torque is though. My Z recently put down similar hp #'s as yours but my torque was much higher (I am using same built motor, BC Stage 2 cams, stock valvetrain, stock intake plenum) - 516 whp & 479 Ft-Lb on a mustang dyno at 13 psi. Not sure how the mustang dyno compares to the Dynamics. I was told that the plenum spacer or the cosworth intake that you have should help with the torque.
I was limited with the Utec/600cc injectors/walbro fuel pump. I intend to upgrade all three at some point but it is nice to see how other setups compare.
It is interesting how low your torque is though. My Z recently put down similar hp #'s as yours but my torque was much higher (I am using same built motor, BC Stage 2 cams, stock valvetrain, stock intake plenum) - 516 whp & 479 Ft-Lb on a mustang dyno at 13 psi. Not sure how the mustang dyno compares to the Dynamics. I was told that the plenum spacer or the cosworth intake that you have should help with the torque.
I was limited with the Utec/600cc injectors/walbro fuel pump. I intend to upgrade all three at some point but it is nice to see how other setups compare.
Thanks for the complements guys.
str8dum1, I checked my Haltech logs from the dyno session and boost curve is pretty simalar from 1 pull to the next +- 75 rpm. I will do some logs on the street and see what those look like. What does it mean if the boost curves are not similar ?
Thanks for the help
str8dum1, I checked my Haltech logs from the dyno session and boost curve is pretty simalar from 1 pull to the next +- 75 rpm. I will do some logs on the street and see what those look like. What does it mean if the boost curves are not similar ?
Thanks for the help
Well that makes it even more unlikely to spool late. I would consider a leakdown test to make sure the engine is 100% ok (probably is but good to get a baseline anyway) and then go start looking for boost leaks. Maybe the run just started late. How does it feel on the street? Another good test to make sure both turbos are working ok is to hook up MAP sensors to the outlet of each turbo compressor.
Last edited by rcdash; Jul 20, 2011 at 06:15 AM.
