Most other threads I have found are either getting old or are guys looking for a grand or more at the wheels-that is too much for me and the reliability is enough of a liability at the power levels that I am looking for.
Basically, I need right around 700rwhp to hit the trap speed (135mph) and low 10's that I desire. I say it now (and I reserve the right to change my mind) but I really don't want to go faster than that with this car. I have a 6 point rollbar but don't want more than that. I'll build a dedicated drag car if I feel the need to go faster.
Here is what I want:
135mph in the ¼ mile (3800lbs car with me in it so around 700 rwhp)
Pump gas friendly, 94 Octane-No ethanol. Water/Meth system for track tune up
~575-600 rwhp on the street, pump gas
Good boost response
Something with a T4 flange, 3 to 3 5/8” V-band discharge less than 1.00 a/r housing
“S” compressor cover 4” in/ 2 ½” out (compatible with current charge pipe setup)
What I have:
Stock block 0.020" over
Diamond 15cc pistons
Eagle H-beams, ARP 2000's
Kellogg Cobra Crank
Zero decked, heads milled to 48 cc chambers, Depending on the calculator it comes out to somewhere around 9.3:1
Ported heads, stock valves
Cams are 227/227 265/267 .550" lift 115.5 LSA, locked out at 108.5 ICL
TFS 154100 springs (pretty much the same as comp 26125's)
TFS Adjustable crank sprockets
McLeod RST Clutch
TR6060
3.55 gears
Greddy Profec B spec 2 boost controller
60 Lb injectors (will step up to something in the 1000cc range when swapping turbos)
GT500 dual fuel pump setup (can add a booster if needed)
-8AN fuel line from the hat to the fuel rail
Powerhouse Turbo Kit
Precision 6776 entry level turbo (rated to 755 hp) 3” inlet/2” outlet 65.5mm compressor inducer, 64.5mm turbine exducer, .81 A/R housing
Here are some of the turbos that I have read up on and I would like to get opinions of how some of these newer styles, somewhat small turbos will do with a middle ground build like this. Most of these turbos are from the import crowd, which makes me wonder if am I overlooking something important?:
Precision 6870 Gen 2 CEA, rated to 1100 hp
https://www.precisionturbo.net/Stre...-and-Race-Turbocharger---GEN2-PT6870-CEA®/578
Comp Turbo part # 436871 Ceramic Ball Bearing, rated to 1100hp
https://ostarmotorsports.com/Store/Product/CT4-Billet-3BB-68-71
Garrett GT4294R (Turbine housing options are a bit big)
https://www.maperformance.com/products/garrett-gt4294-gt4202r-turbocharger-500-1000-hp-gt42r-gt42rs
Turbonetics GTK-850, or GTK-1000, rated to 850 hp and 1000hp
https://turboneticsinc.com/store/index.php?route=product/product&product_id=91
Borg Warner S369SX-E 69/73 (Only Journal bearing turbo of the bunch, but half the price of the others), rated to 1000 hp
https://agpturbo.com/borg-warner-s369sx-e-69-73-13009097051/
Any other suggestions?
Should I just get something more conventional like a Precision PT7275, or a 7675? Will it be happy at lower boost levels-or will it be doggy?
I also looked at the ball-bearing Borg Warner EFR units but the turbine housings seem way huge and the layout of their websites makes research a bit difficult.
What would you suggest?
Basically, I need right around 700rwhp to hit the trap speed (135mph) and low 10's that I desire. I say it now (and I reserve the right to change my mind) but I really don't want to go faster than that with this car. I have a 6 point rollbar but don't want more than that. I'll build a dedicated drag car if I feel the need to go faster.
Here is what I want:
135mph in the ¼ mile (3800lbs car with me in it so around 700 rwhp)
Pump gas friendly, 94 Octane-No ethanol. Water/Meth system for track tune up
~575-600 rwhp on the street, pump gas
Good boost response
Something with a T4 flange, 3 to 3 5/8” V-band discharge less than 1.00 a/r housing
“S” compressor cover 4” in/ 2 ½” out (compatible with current charge pipe setup)
What I have:
Stock block 0.020" over
Diamond 15cc pistons
Eagle H-beams, ARP 2000's
Kellogg Cobra Crank
Zero decked, heads milled to 48 cc chambers, Depending on the calculator it comes out to somewhere around 9.3:1
Ported heads, stock valves
Cams are 227/227 265/267 .550" lift 115.5 LSA, locked out at 108.5 ICL
TFS 154100 springs (pretty much the same as comp 26125's)
TFS Adjustable crank sprockets
McLeod RST Clutch
TR6060
3.55 gears
Greddy Profec B spec 2 boost controller
60 Lb injectors (will step up to something in the 1000cc range when swapping turbos)
GT500 dual fuel pump setup (can add a booster if needed)
-8AN fuel line from the hat to the fuel rail
Powerhouse Turbo Kit
Precision 6776 entry level turbo (rated to 755 hp) 3” inlet/2” outlet 65.5mm compressor inducer, 64.5mm turbine exducer, .81 A/R housing
Here are some of the turbos that I have read up on and I would like to get opinions of how some of these newer styles, somewhat small turbos will do with a middle ground build like this. Most of these turbos are from the import crowd, which makes me wonder if am I overlooking something important?:
Precision 6870 Gen 2 CEA, rated to 1100 hp
https://www.precisionturbo.net/Stre...-and-Race-Turbocharger---GEN2-PT6870-CEA®/578
Comp Turbo part # 436871 Ceramic Ball Bearing, rated to 1100hp
https://ostarmotorsports.com/Store/Product/CT4-Billet-3BB-68-71
Garrett GT4294R (Turbine housing options are a bit big)
https://www.maperformance.com/products/garrett-gt4294-gt4202r-turbocharger-500-1000-hp-gt42r-gt42rs
Turbonetics GTK-850, or GTK-1000, rated to 850 hp and 1000hp
https://turboneticsinc.com/store/index.php?route=product/product&product_id=91
Borg Warner S369SX-E 69/73 (Only Journal bearing turbo of the bunch, but half the price of the others), rated to 1000 hp
https://agpturbo.com/borg-warner-s369sx-e-69-73-13009097051/
Any other suggestions?
Should I just get something more conventional like a Precision PT7275, or a 7675? Will it be happy at lower boost levels-or will it be doggy?
I also looked at the ball-bearing Borg Warner EFR units but the turbine housings seem way huge and the layout of their websites makes research a bit difficult.
What would you suggest?