need to pick Turbos and cam for a TT forged 408
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need to pick Turbos and cam for a TT forged 408
Like the title says, I need to pick turbos and a cam to run in a full forged 408 (iron block, 4340 crank, H beam rods, 8.5:1 Je pistons, ported LS3 heads, single plane intake with an elbow). it is going to be twin turbo, Tubular 1 7/8" primary up and forward headers into the turbos, 3.5" down pipes, 70 C10 pick up 3800-3900lbs, 4L80E, 12 bolt, front mount intercooler, pump gas w/meth, street driven. I was thinking a pair of T76 .84 a/r T4 flange for the turbos. Not sure on the cam side. Thanks in advance.
#2
Like the title says, I need to pick turbos and a cam to run in a full forged 408 (iron block, 4340 crank, H beam rods, 8.5:1 Je pistons, ported LS3 heads, single plane intake with an elbow). it is going to be twin turbo, Tubular 1 7/8" primary up and forward headers into the turbos, 3.5" down pipes, 70 C10 pick up 3800-3900lbs, 4L80E, 12 bolt, front mount intercooler, pump gas w/meth, street driven. I was thinking a pair of T76 .84 a/r T4 flange for the turbos. Not sure on the cam side. Thanks in advance.
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You don't think 2 TC76's will be too much? I have been reading some posts in here and a bunch of guys are making serious power with 2 TC70's. What housing and a/r would you suggest with the TC76's? Thanks.
#7
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We're aiming for 1K RWHP, if possible.
Looking for power pretty low off the line as drive ability is important.
Working on specs now:
6.0L Block (ARP studs, ICE head gaskets - might o-ring)
Bore = 4.030
Stroke = 4.000
Rod Length = 6.125
4340 Crank, H beam rods, pistons (Piston Head Volume+29.00cc) with all ARP bolts.
Heads = PRC LS3 Heads with Patriot springs to .660” lift. 70CC Combustion Chambers, stock sized stainless valves (looking for the flow numbers now)
SLP RockerArm Package L76/L92/LS3 Aluminum OffSet 1.85
6L90E trans (TC stall speed is still TBD)
4 linked rear with 12B - 3.73 posi
30.75" tall tire
Twin T76 .84 a/r T4 (as discussed here)?
Thanks for any info you may give,
-J
Last edited by Grendel; 05-24-2010 at 12:09 PM.
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We're aiming for 1K RWHP, if possible.
Looking for power pretty low off the line as drive ability is important.
Working on specs now:
6.0L Block (ARP studs, ICE head gaskets - might o-ring)
Bore = 4.030
Stroke = 4.000
Rod Length = 6.125
4340 Crank, H beam rods, pistons (Piston Head Volume+29.00cc) with all ARP bolts.
Looking for power pretty low off the line as drive ability is important.
Working on specs now:
6.0L Block (ARP studs, ICE head gaskets - might o-ring)
Bore = 4.030
Stroke = 4.000
Rod Length = 6.125
4340 Crank, H beam rods, pistons (Piston Head Volume+29.00cc) with all ARP bolts.
My opinion; that's a bit large. Dr. Turbo will probably disagree with me to the end of the Earth about that. Either way, I recommend Precision 6765 billet turbochargers. They are rated to 900hp a piece, and with the D-option turbine housing you can get T4 inlet/v-band outlet .81 a/r turbine housings. Pending on your space constraints, you can get the compressor cover in a few different options;
- E-option
- Inlet: 3.00"
- Outlet: 2.00"
- Centerline inlet to centerline outlet: 2.25"
- Cenlterline inlet to outlet tip: 4.35"
- Anti-surge: Not available
- S-option
- Inlet: 4.00"
- Outlet: 2.50"
- Centerline inlet to centerline outlet: 3.00"
- Cenlterline inlet to outlet tip: 4.35"
- Anti-surge: Available (SP)
- H-option
- Inlet: 4.00"
- Outlet: 3.00"
- Centerline inlet to centerline outlet: 3.10"
- Cenlterline inlet to outlet tip: 5.45"
- Anti-surge: Available (HP)
It all depends where you're placing the turbochargers. But for your power requirements, I'd try hard to fit the H-compressor cover.
Once again, just my opinion.
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go with a higher stall, i daily drive my 3300 and its VERY well mannered and is quite noticeable. i think for you like a good 2500-2700 would be good, thats where mine started out and it was nice
#14
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Like the title says, I need to pick turbos and a cam to run in a full forged 408 (iron block, 4340 crank, H beam rods, 8.5:1 Je pistons, ported LS3 heads, single plane intake with an elbow). it is going to be twin turbo, Tubular 1 7/8" primary up and forward headers into the turbos, 3.5" down pipes, 70 C10 pick up 3800-3900lbs, 4L80E, 12 bolt, front mount intercooler, pump gas w/meth, street driven. I was thinking a pair of T76 .84 a/r T4 flange for the turbos. Not sure on the cam side. Thanks in advance.
also, lose the .84 dual entry, and pick a single entry
first guess with limited info given,
get the f1-68 turbine,
.81 or .96 a/r
tc72 or tc76
both would do the requirements
those tc series from FI are just about unbeatable for value.
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if you stick with the divided flange then you can run Spool Valves, and FYI, sunday i was cuttin 1.75 60 foots on a dead hook on street tires in a full weight camaro and trapping 86mph (1/8 mile) so yeah, give it some stall you wont be disappointed.
#18
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RPM range is an interesting question, as I don't know what this motor's reciprocating assembly will handle.
I bought SLP roller rockers for it, it's an all forged lower. Fitment and assembly will be top notch.
What is an effective red line?
I figured I want power low, as I do want to run this over the highway and occasionally on the drag strip.
I bought SLP roller rockers for it, it's an all forged lower. Fitment and assembly will be top notch.
What is an effective red line?
I figured I want power low, as I do want to run this over the highway and occasionally on the drag strip.