428ci LSX iron block...single turbo.....A/C.....????
10-27-2008, 01:20 PM
#1
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428ci LSX iron block...single turbo.....A/C.....???? I've seen a couple threads lately on 428ci's and single turbo's......thats what we were thinking of doing, so I thought I'd ask some questions.
Looks like OFI and "Kentucky Turbo and Performance" is our only choices for the kit.
We have an LSX iron block that has been checked out and its perfect, thank heaven.
We chose to use a sheet metal intake (Hogan most likely) with ETP 6 bolt LS1cathedral port heads.
For our power goals we chose a 98mm turbo.
Is 428ci (4.125" bore x 4" stroke) too many cubes for that turbo?
Will there be lag with 428ci through a 4L80E tranny with a 3200 stall and 3.23gears?
What cubic inch would be better than 428ci….if 428ci isn't good?
Me and my son are building it for no other reason than to roll race. Not drag racing, rolling runs only. It will also be show car ready. It must be a single turbo set-up as its going into a 2001 WS6 F-Body T/A. A/C is a must to keep. We like the OFI kit but don't know if it will fit a 98mm model turbo, maybe the FI98X, might have to re-fab that kit or another kit but we’ll do what’s needed to make it fit. Car is mini-tubbed, lowered and has a very nice suspension (LG Motorsports panhard, SFC, LCA's, G2 springs, Hotchkis STB, Hals all around) already as well as big Willwood brakes. Strange 12 bolt rear end. Tranny is a brand new fully built 4L80E not installed yet. Engine is all we need. I was thinking a Cola crank, Manley rods and Diamond pistons.
Do we know a lot about turbo powered cars....not really. But everyone we know has them so we have a lot of exposure. Just not with LSx engines. We've just had 400-500 RWHP N/A cars mainly. Couple that had nice nitrous shots that were pretty fast. We're ready for the big jump.
Thanks for any input. Build starts immediately after x-mas. Just need to figure out the turbo kit.
Trey
Looks like OFI and "Kentucky Turbo and Performance" is our only choices for the kit.
We have an LSX iron block that has been checked out and its perfect, thank heaven.
We chose to use a sheet metal intake (Hogan most likely) with ETP 6 bolt LS1cathedral port heads.
For our power goals we chose a 98mm turbo.
Is 428ci (4.125" bore x 4" stroke) too many cubes for that turbo?
Will there be lag with 428ci through a 4L80E tranny with a 3200 stall and 3.23gears?
What cubic inch would be better than 428ci….if 428ci isn't good?
Me and my son are building it for no other reason than to roll race. Not drag racing, rolling runs only. It will also be show car ready. It must be a single turbo set-up as its going into a 2001 WS6 F-Body T/A. A/C is a must to keep. We like the OFI kit but don't know if it will fit a 98mm model turbo, maybe the FI98X, might have to re-fab that kit or another kit but we’ll do what’s needed to make it fit. Car is mini-tubbed, lowered and has a very nice suspension (LG Motorsports panhard, SFC, LCA's, G2 springs, Hotchkis STB, Hals all around) already as well as big Willwood brakes. Strange 12 bolt rear end. Tranny is a brand new fully built 4L80E not installed yet. Engine is all we need. I was thinking a Cola crank, Manley rods and Diamond pistons.
Do we know a lot about turbo powered cars....not really. But everyone we know has them so we have a lot of exposure. Just not with LSx engines. We've just had 400-500 RWHP N/A cars mainly. Couple that had nice nitrous shots that were pretty fast. We're ready for the big jump.
Thanks for any input. Build starts immediately after x-mas. Just need to figure out the turbo kit.
Trey
10-28-2008, 11:02 AM
#5
Have you already ordered the heads??
The reason i ask is they have been taking forever to get... like 6-12 months......
Id go with a smaller cubed setup at first also. give ou room to rebuild if something does happen down the road. more cyl wall left.
A 98 mm would be fun with a 402/408..... i see two ther things you didnt mention that if not budgeted can really sneak up on ya... about $5-6K worth...
1. Fuel system.
What Pump, what FP Reg, What size lines, what injectors, fittings.... east $2500 if ya dont watch out LOL
2. Tuning.... with what?? Stock PCM, BS3???
Kyle
The reason i ask is they have been taking forever to get... like 6-12 months......
Id go with a smaller cubed setup at first also. give ou room to rebuild if something does happen down the road. more cyl wall left.
A 98 mm would be fun with a 402/408..... i see two ther things you didnt mention that if not budgeted can really sneak up on ya... about $5-6K worth...
1. Fuel system.
What Pump, what FP Reg, What size lines, what injectors, fittings.... east $2500 if ya dont watch out LOL
2. Tuning.... with what?? Stock PCM, BS3???
Kyle
10-28-2008, 11:16 AM
#6
I'm doing a "basic" fuel system, (dual walbro in tank pumps), -10 AN feed and -6 return with aftermarket rails and a Mallory boost referenced regulator and I'm in a solid 1500-1600 dollars with fittings, pumps, filters, etc. You'll need more than I have as well.
Although, judging by your engine choice, I'd say you have substantial budget for the build.
10-28-2008, 11:38 AM
#7
Quoted for truth.
I'm doing a "basic" fuel system, (dual walbro in tank pumps), -10 AN feed and -6 return with aftermarket rails and a Mallory boost referenced regulator and I'm in a solid 1500-1600 dollars with fittings, pumps, filters, etc. You'll need more than I have as well.
Although, judging by your engine choice, I'd say you have substantial budget for the build.
I'm doing a "basic" fuel system, (dual walbro in tank pumps), -10 AN feed and -6 return with aftermarket rails and a Mallory boost referenced regulator and I'm in a solid 1500-1600 dollars with fittings, pumps, filters, etc. You'll need more than I have as well.
Although, judging by your engine choice, I'd say you have substantial budget for the build.
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10-28-2008, 12:12 PM
#8
I was thinking of doing a similar build with my 98 Camaro only with a 408. I have been doing some reading that the C6 manifolds will allow you to keep the AC. I will be getting some this week and hopefully have the ball rolling around the same time frame you are talking. I would look into that.
10-28-2008, 02:58 PM
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Id go with a smaller cubed setup at first also.
A 98 mm would be fun with a 402/408.....
A 98 mm would be fun with a 402/408.....
If we use the FI98X, wouldn't a 408ci be too small to to get the max potential power from it?
Is it a mistake to go 428ci? We want 1450 rwhp, thats the firm goal.
How about a compromise, 422ci. (4.0 stroke x 4.1 bore)
1. Fuel system.
What Pump, what FP Reg, What size lines, what injectors, fittings.... east $2500 if ya dont watch out LOL
What Pump, what FP Reg, What size lines, what injectors, fittings.... east $2500 if ya dont watch out LOL
But I will spend the cash for this build, no skimping anywhere.
10-28-2008, 08:38 PM
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10-29-2008, 08:27 AM
#15
I agree with that. From my experience doing the belt drive would have been easier, cheaper, and more effective than my current setup. I am happy with with it as it will support the power I am going to make, but it is not the best solution.
10-29-2008, 08:29 AM
#16
Local guy in town has a set of the ETP LS1 cathedrals. They were going to use it on their 430ci LSX iron blocked, big single turbo build for some Grand National drag car, but they are selling them to me.
Wouldn't a 4.125 bore on the LSX iron block leave a ton of cylinder wall left?
If we use the FI98X, wouldn't a 408ci be too small to to get the max potential power from it?
Is it a mistake to go 428ci? We want 1450 rwhp, thats the firm goal.
How about a compromise, 422ci. (4.0 stroke x 4.1 bore)
Aeromotive or maybe the Nasty Perf. fuel systems. (what esle is there?) BS3 for sure with a SD tune. 100% full time race gas. All of those other details you brought up I'll leave to the turbo guru that builds the kit. I looked into a Gayle Banks 427ci TT over a year ago, but $55,000 is just way too much for just an engine and turbo kit. I know it can be done cheaper with the same quality.
But I will spend the cash for this build, no skimping anywhere.
Wouldn't a 4.125 bore on the LSX iron block leave a ton of cylinder wall left?
If we use the FI98X, wouldn't a 408ci be too small to to get the max potential power from it?
Is it a mistake to go 428ci? We want 1450 rwhp, thats the firm goal.
How about a compromise, 422ci. (4.0 stroke x 4.1 bore)
Aeromotive or maybe the Nasty Perf. fuel systems. (what esle is there?) BS3 for sure with a SD tune. 100% full time race gas. All of those other details you brought up I'll leave to the turbo guru that builds the kit. I looked into a Gayle Banks 427ci TT over a year ago, but $55,000 is just way too much for just an engine and turbo kit. I know it can be done cheaper with the same quality.
But I will spend the cash for this build, no skimping anywhere.
10-29-2008, 01:00 PM
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When you say 408ci is "perfect", is that for fast spool-up time and potential power we will make?
Spooling fast is the priority.
I assume the difference in final power/torque numbers between a 408ci and a 422/428ci is minimal, so if I had the choice I'd rather have the bigger cube engine for quicker spooling.
Am I thinking correctly, or no?
Spooling fast is the priority.
I assume the difference in final power/torque numbers between a 408ci and a 422/428ci is minimal, so if I had the choice I'd rather have the bigger cube engine for quicker spooling.
Am I thinking correctly, or no?
10-29-2008, 01:47 PM
#19
When you say 408ci is "perfect", is that for fast spool-up time and potential power we will make?
Spooling fast is the priority.
I assume the difference in final power/torque numbers between a 408ci and a 422/428ci is minimal, so if I had the choice I'd rather have the bigger cube engine for quicker spooling.
Am I thinking correctly, or no?
Spooling fast is the priority.
I assume the difference in final power/torque numbers between a 408ci and a 422/428ci is minimal, so if I had the choice I'd rather have the bigger cube engine for quicker spooling.
Am I thinking correctly, or no?
10-29-2008, 01:47 PM
#20