Results of the LT4 78mm turbo 20psi :)
11-29-2008, 02:36 PM
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Results of the LT4 78mm turbo 20psi :) Hey guys I thought I would post this up over here to get some forced induction enthusiasm going for the ole LTx and L98 C4's that people have seemed to forget about when it comes to making good power.. I recently finished building this setup and Hope you enjoy the video and dyno graphs!
the build is as follows:
355 Eagle crank/rod forged low compression custom Ross Pistons with L-19 rod bolt upgrade and tapered tool steel piston pins
stage 3 ported trickflow heads runner volume is 220cc's
Edelbrock LT4 intake.. unported as of right now (was ina rush to finish up, I will port it soon)
58mm throttle body
224 224 .570/.570 115lsa cam
AFR Hydrarev kit
cadillac racing lifters
Comp Promag 1.6's
Stainless steel custom manifolds with 2.5" crossover and 3.5" downpipe (Custom fabbed by me)
Precision PT 78 HPS turbocharger
Tial 44mm wastegate (big and Little blue springs installed)
83lb/hr injectors soon to be 160's
Fuelab 42401 pump (1500hp rated)
all custom rails with -10 feed and -8 return
Aeromotive A1000 Regulator
4" intercooler with 3" intercooler piping (aluminum custom Fabbed by me)
MSD 6a
Accel DFI Gen 7 Pro Key w/ DUal Synch Distributor and Wideband
No Lift to Shift Box
315 Nitto Drag Radials (useless in anything besides 4th gear at current boost level)
I am sure there is more but I forget right now! lol
Here is the UNCORRECTED numbers.. this is what the car made here where I live on the rollers without any influence of standardizing.. this is the amount of power I drive around on everyday.
without further ado here is the graph.. I am out of injector so i will need to wait until I get some 160's in the cra to turn up the boost and see what we can do with it on kill.. this is my 1.87/gallon fuel street tune...
Chris
In car video footage, traction limited and hard t film while driving excuse the shakiness!
VIDEO OF In Car Footage:
http://www.youtube.com/watch?v=ytnBEPHvTj4
http://www.youtube.com/watch?v=OhFLsrPezy8
VIDEO OF DYNO RUN:
http://www.youtube.com/watch?v=tOKLFF9jTkY
the build is as follows:
355 Eagle crank/rod forged low compression custom Ross Pistons with L-19 rod bolt upgrade and tapered tool steel piston pins
stage 3 ported trickflow heads runner volume is 220cc's
Edelbrock LT4 intake.. unported as of right now (was ina rush to finish up, I will port it soon)
58mm throttle body
224 224 .570/.570 115lsa cam
AFR Hydrarev kit
cadillac racing lifters
Comp Promag 1.6's
Stainless steel custom manifolds with 2.5" crossover and 3.5" downpipe (Custom fabbed by me)
Precision PT 78 HPS turbocharger
Tial 44mm wastegate (big and Little blue springs installed)
83lb/hr injectors soon to be 160's
Fuelab 42401 pump (1500hp rated)
all custom rails with -10 feed and -8 return
Aeromotive A1000 Regulator
4" intercooler with 3" intercooler piping (aluminum custom Fabbed by me)
MSD 6a
Accel DFI Gen 7 Pro Key w/ DUal Synch Distributor and Wideband
No Lift to Shift Box
315 Nitto Drag Radials (useless in anything besides 4th gear at current boost level)
I am sure there is more but I forget right now! lol
Here is the UNCORRECTED numbers.. this is what the car made here where I live on the rollers without any influence of standardizing.. this is the amount of power I drive around on everyday.
without further ado here is the graph.. I am out of injector so i will need to wait until I get some 160's in the cra to turn up the boost and see what we can do with it on kill.. this is my 1.87/gallon fuel street tune...
Chris
In car video footage, traction limited and hard t film while driving excuse the shakiness!
VIDEO OF In Car Footage:
http://www.youtube.com/watch?v=ytnBEPHvTj4
http://www.youtube.com/watch?v=OhFLsrPezy8
VIDEO OF DYNO RUN:
http://www.youtube.com/watch?v=tOKLFF9jTkY
Last edited by lcvette; 11-29-2008 at 02:42 PM.
11-29-2008, 03:03 PM
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the dip at the end is a mystery.. may be the turbine side going into choke or the wastegate being forced open by backpressure is the likely reason.. I am asking alot of the T4 78mm turbo at this boost level I think but she is delivering!
this setup is now sold and I am going to start building a larger GT88 setup with more flow potential in the manifolds and downpipe.
Chris
this setup is now sold and I am going to start building a larger GT88 setup with more flow potential in the manifolds and downpipe.
Chris
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with that HKS 'shroom 
11-29-2008, 11:12 PM
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in regards to the 160 lb injectors, I am currently running E70 actually not E85 and am going static on my 83lb/hr injectors.. I have skinned this kittycat too many times with other builds going too small on injectors.. with true E85 I will need the 160's at the future boost level I plan on running on the newer setup i will be building, so there is a method to my madness. also on E70-E85 tuning in part throttle driveability is not as tough as it is on Gasoline especially with the newer faster Bosch injectors.. this isn't my first dance so to speak. i tuned in 1600cc injectors on a 2.0L DSM and let me tell you, a 122 CI motor is way more tempermental then a 355ci motor when it comes to part throttle driveability. you learn alot when you dabble in both sides of the spectrum.. that build was here:
http://www.youtube.com/watch?v=hB3eVx4Ggnk
Great to get a feel for other cars especially ones that operate at 40+ PSI of boost!!! it brings in a new perspective of whats what!
I am very pleased with these results and look forward to the new build and seeing what else I can pump from this LTx based model motor.. I love the LSX motors but from time to time a change up isn't a bad for anyone.. we all like a little strange don't we..lol
Chris
11-30-2008, 04:52 AM
#16
TECH Apprentice
the drip is due to camshaft
i had the same...
smallish cam
mid 230's @ .050 @ 114 sep
.509 total lift
std oem heads
1.94 intake , 1.5 exhaust
this is one of my 355 cube ttsbc
nice numbers you got for 78mm .......
i had the same...
smallish cam
mid 230's @ .050 @ 114 sep
.509 total lift
std oem heads
1.94 intake , 1.5 exhaust
this is one of my 355 cube ttsbc
nice numbers you got for 78mm .......
12-01-2008, 10:11 AM
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gotta get the new injectors and Eboost2 int he car and I will be heading back to the dyno to see if I can get that boost fall off straightened out and try to maybe go another couple pounds of boost for a glory run.. then I take ya for a ride before I tear it apart and send the kit off to Finland to its new home.
Chris
Chris
