SFI 25.2 Mustang/LSx build "The Renegade"
09-27-2008, 11:23 AM
#1241
Tom's post brings up a good point.
Phil,
have you talked to LME or LMR? Their race car also has a LSX block that has pushed 2500+ HP and got beat on real good, they did a few disassemblies for inspection and everything was looking good. They ran the **** out of that car and it was trapping as high as 193.
Phil,
have you talked to LME or LMR? Their race car also has a LSX block that has pushed 2500+ HP and got beat on real good, they did a few disassemblies for inspection and everything was looking good. They ran the **** out of that car and it was trapping as high as 193.
There have been a few LSx meltdowns that have not and will not be posted on any public msg board. As far as who I have already talked to, I can't really say.
Don't believe everything you hear. 
09-27-2008, 01:37 PM
#1243
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About 40 or so. I would not even try to go past 50 passes without a disassemble and freshen up anyways. At this HP level I like to see everything inspected. We swap out the trans every 4 races for inspection as well. When you are running at this weight and HP it is not even safe to try and run a durability contest.
Tom
Last edited by FSTR-THANU; 09-27-2008 at 01:46 PM.
09-27-2008, 06:48 PM
#1244
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I'm running twin 76's on an LSX block street car. So I'm going to be greedy and say they should do another article on that build with more engineering specifics unless it's proprietary (since they sell engines, they might not want to give many details out). Typical stuff like what was the boost curve vs rpm on the 2050 runs, AIT's, timing, etc, etc....why the heck was a billet one off manifold used....did they dyno other manifolds? Results? Would love to see the LS7 manifold dyno'd on that combo. What were the turbo specs? 88mm leaves a lot out......very impressive build to say the least....bring on the data.
Heck, set up a web site photo and fact sheet on that build,,,, it deserves it.
09-28-2008, 12:09 AM
#1245
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Tom's post brings up a good point.
Phil,
have you talked to LME or LMR? Their race car also has a LSX block that has pushed 2500+ HP and got beat on real good, they did a few disassemblies for inspection and everything was looking good. They ran the **** out of that car and it was trapping as high as 193.
Phil,
have you talked to LME or LMR? Their race car also has a LSX block that has pushed 2500+ HP and got beat on real good, they did a few disassemblies for inspection and everything was looking good. They ran the **** out of that car and it was trapping as high as 193.
But, that just isn't enough info for me cause I hear from someone else that there have been quite a few guys with LSX blocks busted all to hell in the cylinders and **** like that.
09-28-2008, 12:13 AM
#1246
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That is your right. Really IMO your goals were very attainable. I am not currently using a billet crankshaft. I am using 1 stage. I use a 4.185 bore. All of the things that you have listed in your build are more conservative than others being discussed here.
I would love to use 2 stages.
Also remember there are people here making suggestions on their experience with other engines. I would seek out builders who have built the high horsepower LSX engines. A lot of testing and development has been done. I know that this valuable to those who have tested and gained this knowledge.
The bore spacing and the additional material on the crankshaft make the BBC a very reliable engine. Like the SBC there are years and years of development and information.
Either way good luck with your build.
Robin
I would love to use 2 stages.
Also remember there are people here making suggestions on their experience with other engines. I would seek out builders who have built the high horsepower LSX engines. A lot of testing and development has been done. I know that this valuable to those who have tested and gained this knowledge.
The bore spacing and the additional material on the crankshaft make the BBC a very reliable engine. Like the SBC there are years and years of development and information.
Either way good luck with your build.
Robin
09-28-2008, 12:17 AM
#1247
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Well this 526 BBC went 4.70/80s back in the early 90's in a 2500lb tube'd mustang on just 1 big fogger. We are hoping for 5.20s in my stock suspension fbody. This motor has been sitting for a LONG time, but I'm ordering a new set of aluminum rods next week and freshening it up. Dropped about 100lbs out of the Z today and got a little more to go.
09-28-2008, 08:25 AM
#1248
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Robin,
I'm running twin 76's on an LSX block street car. So I'm going to be greedy and say they should do another article on that build with more engineering specifics unless it's proprietary (since they sell engines, they might not want to give many details out). Typical stuff like what was the boost curve vs rpm on the 2050 runs, AIT's, timing, etc, etc....why the heck was a billet one off manifold used....did they dyno other manifolds? Results? Would love to see the LS7 manifold dyno'd on that combo. What were the turbo specs? 88mm leaves a lot out......very impressive build to say the least....bring on the data.
Heck, set up a web site photo and fact sheet on that build,,,, it deserves it.
I'm running twin 76's on an LSX block street car. So I'm going to be greedy and say they should do another article on that build with more engineering specifics unless it's proprietary (since they sell engines, they might not want to give many details out). Typical stuff like what was the boost curve vs rpm on the 2050 runs, AIT's, timing, etc, etc....why the heck was a billet one off manifold used....did they dyno other manifolds? Results? Would love to see the LS7 manifold dyno'd on that combo. What were the turbo specs? 88mm leaves a lot out......very impressive build to say the least....bring on the data.
Heck, set up a web site photo and fact sheet on that build,,,, it deserves it.
I will be bolting my engine on Thomson's dyno this morning. I will ask for the informaton.
I know that Performance Division made the manifold. It was made to clear the hood on the Impala SS.
No other manifolds were tested.
Turbos were Turbonetics as the article stated. I'll get the info on the exhaust housings etc.
I will see if Brian will give me a printout of the pulls. Good info there.
Robin
09-28-2008, 08:31 AM
#1249
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I will be bolting my engine on Thomson's dyno this morning. I will ask for the informaton.
I know that Performance Division made the manifold. It was made to clear the hood on the Impala SS.
No other manifolds were tested.
Turbos were Turbonetics as the article stated. I'll get the info on the exhaust housings etc.
I will see if Brian will give me a printout of the pulls. Good info there.
Robin
I know that Performance Division made the manifold. It was made to clear the hood on the Impala SS.
No other manifolds were tested.
Turbos were Turbonetics as the article stated. I'll get the info on the exhaust housings etc.
I will see if Brian will give me a printout of the pulls. Good info there.
Robin
That was a killer build.
09-28-2008, 06:58 PM
#1250
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Well this 526 BBC went 4.70/80s back in the early 90's in a 2500lb tube'd mustang on just 1 big fogger. We are hoping for 5.20s in my stock suspension fbody. This motor has been sitting for a LONG time, but I'm ordering a new set of aluminum rods next week and freshening it up. Dropped about 100lbs out of the Z today and got a little more to go.
09-29-2008, 01:07 PM
#1255
Man after looking for days I found 2 sets of some 9310 gears that are prefect for my setup. I looked high and low and could not find a set of 9310 gears bigger than 3.40s. Place down in SC had a few sets of old stock that are not currently on the market.
Old gears: 8200 = 192/193
New gears set A: 8200 = 209/211
New gears set B: 8200 = 212/213
So either gear will drop me in the mid to high 7s for 200mph which is where I want to be.
Old gears: 8200 = 192/193
New gears set A: 8200 = 209/211
New gears set B: 8200 = 212/213
So either gear will drop me in the mid to high 7s for 200mph which is where I want to be.
Last edited by Phil99vette; 09-29-2008 at 01:22 PM.
09-29-2008, 02:07 PM
#1256
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Man after looking for days I found 2 sets of some 9310 gears that are prefect for my setup. I looked high and low and could not find a set of 9310 gears bigger than 3.40s. Place down in SC had a few sets of old stock that are not currently on the market.
Old gears: 8200 = 192/193
New gears set A: 8200 = 209/211
New gears set B: 8200 = 212/213
So either gear will drop me in the mid to high 7s for 200mph which is where I want to be.
Old gears: 8200 = 192/193
New gears set A: 8200 = 209/211
New gears set B: 8200 = 212/213
So either gear will drop me in the mid to high 7s for 200mph which is where I want to be.
09-29-2008, 02:35 PM
#1257
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Man after looking for days I found 2 sets of some 9310 gears that are prefect for my setup. I looked high and low and could not find a set of 9310 gears bigger than 3.40s. Place down in SC had a few sets of old stock that are not currently on the market.
Old gears: 8200 = 192/193
New gears set A: 8200 = 209/211
New gears set B: 8200 = 212/213
So either gear will drop me in the mid to high 7s for 200mph which is where I want to be.
Old gears: 8200 = 192/193
New gears set A: 8200 = 209/211
New gears set B: 8200 = 212/213
So either gear will drop me in the mid to high 7s for 200mph which is where I want to be.
09-29-2008, 03:25 PM
#1258
We're going to throw the LSx back together, mock it up on the engine dyno, make 50 pulls @ 2000+hp, tear it down. If we can get it to live we'll throw it back in the Mustang, if not we'll part it out and build a 550+ BBC. My old gears were 3.50s new ones are alittle bigger.
09-29-2008, 04:54 PM
#1259
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Danny Miller didn't have 3:30 or 3:20 pro gears. I finally found a set of 3:20 pro gears out in Cali.
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1966 Chevy II twin turbo LS3 project
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1966 Chevy II twin turbo LS3 project
2016 Z07 Carbon