72mm or 75mm S400 to big for 5.3?
#1
72mm or 75mm S400 to big for 5.3?
im looking at a 72mm or 75mm S400 both with the T6 flange and 1.10 A/R Ratio i was wondering if this would be a good turbo for a 5.3
the 5.3 is going trough a built TH350 with 3600 stall and a 10bolt with 4.11's and posi (might switch accordingly)
i figured the 4.11's will make up for the big A/R and help me get into the boost quicker (also might be getting a 50-75 shot of nitrous off the line to help with spooling also)
full rundown of the 5.3
218/224 .550/.550 114
TSP pushrods
LS6 springs (will be upgrading to a spring with a higher seat pressure around 150#)
ls1 intake will be swtiching when money allows
60# injectors
ARP rod bolts
something tells me im gonna have to modify something to get a 5" DP to work with the stock k member though haha. im thinking about cutting a 6" pipe in half and knotching the k member with that and running the DP tucked in the 6" pipe
the 5.3 is going trough a built TH350 with 3600 stall and a 10bolt with 4.11's and posi (might switch accordingly)
i figured the 4.11's will make up for the big A/R and help me get into the boost quicker (also might be getting a 50-75 shot of nitrous off the line to help with spooling also)
full rundown of the 5.3
218/224 .550/.550 114
TSP pushrods
LS6 springs (will be upgrading to a spring with a higher seat pressure around 150#)
ls1 intake will be swtiching when money allows
60# injectors
ARP rod bolts
something tells me im gonna have to modify something to get a 5" DP to work with the stock k member though haha. im thinking about cutting a 6" pipe in half and knotching the k member with that and running the DP tucked in the 6" pipe
Last edited by nastychevelle; 05-05-2009 at 09:28 AM.
#4
Yes less boost , but a little more lag...though won't be much. As for gearing, you want the other way around. More load gets you quicker spool up.
#6
I would go 75mm, and stick with the 1.10A/R. A smaller A/R will have backpressure problems as the power goes up. As for gears...3.42's.
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#10
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I agree for the most part. The 1.1 83mm TW will come on pretty fast with a good tune. The 72 has carried us to 747rwhp on a 6sp car. We have went too 825 with a 74. At these power levels we were beyond 2:1 for pressure ratio with the 83mm turbine wheel. Although we wouldn't push the stock engine much further anyhow.
We used the 1.1 t6 combo with a 68mm compressor wheel and it came in stupid fast and made 681 to the tires through a 4l80e, 4:56's and 35" tires. You can do a search for that one rather recent.
We used the 1.1 t6 combo with a 68mm compressor wheel and it came in stupid fast and made 681 to the tires through a 4l80e, 4:56's and 35" tires. You can do a search for that one rather recent.
#13
I agree for the most part. The 1.1 83mm TW will come on pretty fast with a good tune. The 72 has carried us to 747rwhp on a 6sp car. We have went too 825 with a 74. At these power levels we were beyond 2:1 for pressure ratio with the 83mm turbine wheel. Although we wouldn't push the stock engine much further anyhow.
We used the 1.1 t6 combo with a 68mm compressor wheel and it came in stupid fast and made 681 to the tires through a 4l80e, 4:56's and 35" tires. You can do a search for that one rather recent.
We used the 1.1 t6 combo with a 68mm compressor wheel and it came in stupid fast and made 681 to the tires through a 4l80e, 4:56's and 35" tires. You can do a search for that one rather recent.
so how much power you think i could put down with this setup..
5.3
ls1 intake (will get switched when money allows)
mls head gaskets
218/224 .550/.550 114lsa cam
tsp pushrods
high seat pressure springs 150+
arp rod bolts
60# injectors base pressure at 60-65psi
aeromotive boost referenced FPR
truck manifolds
2.5" crossover
75mm s400 (hp at different boosts... 10/12/14)
4" thick frontmount IC
tial 38mm WG
turbo xs rfl BOV
4" DP into a bullet>cutout>magnaflow dumped at axle (sleeper status =) )
TH350 rebuilt with good bands/clutches/shiftkit/ 3500-3800 stall
10bolt
3.42's
stock posi (gear style not clutch style) (also will get changed when money allows .. or it breaks)
also what kinda times do you think i could put down with these suspension and chassis upgrades
8pt cage will get switched to 10pt if i break 9's
SFC's
custom made adjustable LCA's
adjustable torque arm
315/50/r15 et streets or nitto 555r's
also might use a 50shot off the line if i run lower boost (10-12)
Last edited by nastychevelle; 05-06-2009 at 09:10 AM.
#14
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iTrader: (10)
What year is the engine, the rods are the determining factor in high hp stock bottom builds, is a 05' newer??? If it has the old rods I would keep it below 650whp through a unlocked stall. Should go 130+mph at under 3500lbs then. If its a 05' newer engine with floating pins then 750whp can be had with good fuel and a careful tune. At least this is what we have seen before you bend and then snap rods. These numbers are through a stall, we have been over 850whp through 6sp's on the 05' newer stuff.
#15
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iTrader: (7)
so how much power you think i could put down with this setup..
5.3
ls1 intake (will get switched when money allows)
mls head gaskets
218/224 .550/.550 114lsa cam
tsp pushrods
high seat pressure springs 150+
arp rod bolts
60# injectors base pressure at 60-65psi
aeromotive boost referenced FPR
truck manifolds
2.5" crossover
75mm s400 (hp at different boosts... 10/12/14)
4" thick frontmount IC
tial 38mm WG
turbo xs rfl BOV
4" DP into a bullet>cutout>magnaflow dumped at axle (sleeper status =) )
TH350 rebuilt with good bands/clutches/shiftkit/ 3500-3800 stall
10bolt
3.42's
stock posi (gear style not clutch style) (also will get changed when money allows .. or it breaks)
also what kinda times do you think i could put down with these suspension and chassis upgrades
8pt cage will get switched to 10pt if i break 9's
SFC's
custom made adjustable LCA's
adjustable torque arm
315/50/r15 et streets or nitto 555r's
also might use a 50shot off the line if i run lower boost (10-12)
5.3
ls1 intake (will get switched when money allows)
mls head gaskets
218/224 .550/.550 114lsa cam
tsp pushrods
high seat pressure springs 150+
arp rod bolts
60# injectors base pressure at 60-65psi
aeromotive boost referenced FPR
truck manifolds
2.5" crossover
75mm s400 (hp at different boosts... 10/12/14)
4" thick frontmount IC
tial 38mm WG
turbo xs rfl BOV
4" DP into a bullet>cutout>magnaflow dumped at axle (sleeper status =) )
TH350 rebuilt with good bands/clutches/shiftkit/ 3500-3800 stall
10bolt
3.42's
stock posi (gear style not clutch style) (also will get changed when money allows .. or it breaks)
also what kinda times do you think i could put down with these suspension and chassis upgrades
8pt cage will get switched to 10pt if i break 9's
SFC's
custom made adjustable LCA's
adjustable torque arm
315/50/r15 et streets or nitto 555r's
also might use a 50shot off the line if i run lower boost (10-12)
#16
first off its not a dream list.... its whats going to happen... its gonna take a while but it will happen so GTFO
the motor is a 02 so looks like ill have to keep it below 650 for a while.... im gonna have to do some weight reduction to get it under 3500lbs with me in it cause im 250lbs myself... but i guess ill have to weigh it before to get an idea....
so are you saying the stock pistons arent a weak link that its the rods? like if i upgraded the rods and kept the pistons stock would it be decently strong?
What year is the engine, the rods are the determining factor in high hp stock bottom builds, is a 05' newer??? If it has the old rods I would keep it below 650whp through a unlocked stall. Should go 130+mph at under 3500lbs then. If its a 05' newer engine with floating pins then 750whp can be had with good fuel and a careful tune. At least this is what we have seen before you bend and then snap rods. These numbers are through a stall, we have been over 850whp through 6sp's on the 05' newer stuff.
so are you saying the stock pistons arent a weak link that its the rods? like if i upgraded the rods and kept the pistons stock would it be decently strong?
#17
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iTrader: (10)
Yes the rods have bent before the pistons break in my experience, that is with good fuel and careful tuning. All of the ones I have seen with broken pistons have been from detonation. I think the pistons in the 05's are stronger too.
Either will break on pump gas though especially above 500whp.
Either will break on pump gas though especially above 500whp.
#18
Yes the rods have bent before the pistons break in my experience, that is with good fuel and careful tuning. All of the ones I have seen with broken pistons have been from detonation. I think the pistons in the 05's are stronger too.
Either will break on pump gas though especially above 500whp.
Either will break on pump gas though especially above 500whp.