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SFI 25.2 Mustang/LSx build "The Renegade"

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Old 09-17-2008, 06:07 AM
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Originally Posted by JBM
Am I being "nosey" if I have put 14K into an LSX short block that is being built as we speak? I went this route with the confidence that the block could handle anything I could throw at it. If this isnt the case, I'd like to know. What if no one shared the issue with the comp 918 valve springs seven years ago? Again, best of luck resolving the issue.
unless you plan on pushing it to 190+ mph...then the problems he's seen probably won't plague you

He pointed it out clearly...if you want to build something of that caliber with an LSX....best take it to one of his recommended engine shops
Old 09-17-2008, 06:38 AM
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I hear ya. I probably wont have an issue, but I know of lesser set ups that have had issues with this block. I was under the understanding that the initial issue was a QC problem as opposed to a design flaw.
Besides, nothing is harder on a set up than trying to max out a nitrous car.
Old 09-17-2008, 07:44 AM
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Originally Posted by JBM
I hear ya. I probably wont have an issue, but I know of lesser set ups that have had issues with this block. I was under the understanding that the initial issue was a QC problem as opposed to a design flaw.
Besides, nothing is harder on a set up than trying to max out a nitrous car.
you'll have piston and rod bearing problems well before you see the stuff Phil did...
Old 09-17-2008, 08:03 AM
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What size bore did you go with JBM?
Old 09-17-2008, 08:47 AM
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I spoke with a forum member last night about this problem and he at first did not understand my stance. Lets all face it at some point its about money. At this point in the game, I personally have roughly $4,000 tied into what is now R & D parts.

As we venture on with the motor I will have invested over $12,000 of my own personal money between parts and machine work in an effort to get this block to live @ the power levels we're generating. Let me make this clear there is no shop funding the project and GM is not contributing to the project financially or with any technical information. I am going to do the R & D to get the motor to live with my dime.

Let me ask you guys the question. If you personally spent over 10k to fix a issue in a mass produced product would you simply give the information away? If any of you guys want to donate and be apart of the findings be my guest. The people that have helped me along the build with invalueable technical information will be kept updated of the findings. Not trying to be an a$$hole but its just the way it is.

Kurt Urban has been one of the pioneers with the LS1 style motor and he knows what it takes to make the LS1 motor run at this level for a season. He has helped with much needed technical information throughout the build and honestly the problem is something he is working on also. He is one of the only engineers besides my guys @ Virginia speed that has stepped up to try and work on solutions for the problem.

So for you guys that want to know, if you want to donate any money for testing let me know. You guys have seen to date I have not been shy about giving out information but at this point we've got too much invested to just give away the solution which at this point merely a hypothesis on paper.
Old 09-17-2008, 11:37 AM
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Originally Posted by ATVracr
Phil, Does your motor have billet main caps?
Wayne,
Yes we're using the Billet main caps.
Old 09-17-2008, 03:37 PM
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Originally Posted by Phil99vette
Wayne,
Yes we're using the Billet main caps.
Hope you get it figured out Phil. We are getting ready to pull the trigger on a couple of turbos and a A2W and it would be nice to know there is a fix even if we dont know what it is. haha

I feel your pain with the R&D stuff, me and Shiz have spent a ton of money on "figuring stuff out"
Thats one of the reasons we have been fighting the switch to turbos, Once we switch we are back to square one with figuring stuff out.

Do you think the dart or world blocks would be any better?
Old 09-17-2008, 03:39 PM
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That billet dart block, I can't see how it wouldn't be better.
Old 09-17-2008, 03:46 PM
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Originally Posted by ATVracr
Hope you get it figured out Phil. We are getting ready to pull the trigger on a couple of turbos and a A2W and it would be nice to know there is a fix even if we dont know what it is. haha

I feel your pain with the R&D stuff, me and Shiz have spent a ton of money on "figuring stuff out"
Thats one of the reasons we have been fighting the switch to turbos, Once we switch we are back to square one with figuring stuff out.

Do you think the dart or world blocks would be any better?
I think we'll have a motor running in 8-9 weeks. We'll make 20-50 dyno pulls @ 2000+HP and tear the motor down. Once we have a solution it will be available to the public.
Old 09-17-2008, 04:27 PM
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Everyone always wants something for nothing, me included. I don't blame you in your decision to keep a solution to yourself. It's all business and with that kind of investment in R&D I think your doing the right thing even tho some others might argue. To bad you didn't put this in a GM body or General motors might have kept their eye on you and backed the cause since this is definately something new.
Old 09-17-2008, 04:37 PM
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I am not holding my breath but I would love to see GMs input on the project. I could care less if its in a Geo metro. Our endurance style testing is going to be done in a dyno cell in the next 2-3 months.

Once the combo is proven Shawn will offer a 2500hp setup and likely a 2000hp setup.

Last edited by Phil99vette; 09-17-2008 at 04:42 PM.
Old 09-17-2008, 05:36 PM
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Very true, but with a gm powertrain being in a ford vehicle, GM wouldn't be able to put it up on magazine covers and tout a solid GM product after you get it all figured out since by face it looks like a Ford product. I'm sure you had good reasons keeping the Ford body tho, and the car does look amazing from the photos shown. I wouldn't know how hard it would be to get ahold of gm Performance parts on the failure but other posts I've seen the user name ROBIN from GM performance parts could be a start if you didn't talk to them already.
Old 09-17-2008, 05:42 PM
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I could care less about being on a magazine cover or posting record dyno numbers. At this point its trying to make an engine live @ the levels they stated.
Old 09-17-2008, 07:27 PM
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Hey phil your a part time R & D man for GM .. what do you do for a daily grind?
Old 09-17-2008, 07:51 PM
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Originally Posted by JL ws-6
What size bore did you go with JBM?
Can't tell you. It's a secret.
4.185
Old 09-17-2008, 07:57 PM
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Originally Posted by 87Lt1Monte
Hey phil your a part time R & D man for GM .. what do you do for a daily grind?


Sell FORDS
Old 09-17-2008, 08:17 PM
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Originally Posted by JBM
Can't tell you. It's a secret.
4.185

Oh boy.....
Old 09-17-2008, 09:27 PM
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All in good fun. Hats off to Phil for being a pioneer with his set up. Sounds like his game plan will help alot of others out down the road.
Old 09-18-2008, 09:31 PM
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Originally Posted by NA$TY-TA
Sell FORDS
And dodges !!!!!!!!!!!!!1
Old 09-20-2008, 01:11 PM
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We've got a game plan for trying to fix the problem. Shawn has contacted a company to build a crankshaft, new connecting rods and pistons. Between the new crankshaft and custom pieces in the block we're hoping to add some much needed strength.

Some of the problems we're seeing with the motor are associated to the RPM range and the horsepower level. People have made these motors live @ 7000 rpm and 2000hp but in a drag radial car built to be run with the guns 7k just does not get it done. These motors need to be twisted to 8500-9000, add a 4" stroke and the block starts doing crazy ****.


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