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Hey my fellow vette people,
I'm happy to say I have finally sent my car to be fixed. For those that don't know my story, I had fuel injector issues (gen 1 FIC 30%) that I fought with for a while trying to figure out what the issues were. We finally changed them out to the Gen 2's, which kuddos to FIC for swapping them out and got it running perfect. Sadly it was too late and the short block gave up the ghost. Pulled everything apart this week and found the infamous thrust bearing was the issue.
So on to the positive stuff. Car is now getting a fresh new LME 1400 hp 416 built using my block. Also a new port injection fuel system with a triple in tank pump. Last but not least 2 Xona rotor XRC6869S turbos. The turbo kit is by Performance Supercar. it is nicest kit I've seen that can be ordered and installed by yourself or your shop (https://performance-supercar.com/pro...41942973251653). We are going with the DSX atlas controller for the port injection. I'm pretty excited for this build. The turbos will be more than I need for now, but later it can be turner up with the proper parts. I'll be sure to update this as the build comes together.
Just a heads up I will have a ton of parts from my previous build which was a max effort LT4. Kong x port super charge with all the pulleys, Cordes ice tank, heat exchanger, Mighty mouse wild catch can (1200 hp), 103 NW tb, Cordes 5" CAI, Alky Meth Kit with brand new pump, American Racing 2" headers, FIC Gen 2 30% inj, JMS voltage booster for lowside fuel pump, DSX aux lowside, LMP lid. Itd be a great package if all bought as one. Everything someone would need minus the cam kit. I'm also changing the cam out. Its a "rowdy" custom spec cam by MTI.
Last edited by samwint77; Jan 17, 2025 at 05:47 PM.
New build sounds stout! What kinda power were you making when the stock bottom end gave out?
It was at 856whp/892wtq SAE correction, 890whp/927wtq STD correction. but again the injector making the engine sputter under power I believe was the issue. It should have lived under that power level.
Did you end up doing heads with this build? Doing a LME 416 and still going back and forth over heads or stock p/p job.
I have Frankenstein heads already. They should be good. I wound up going with the Xona 6469's. They should be good for north of 1200 wheel. Also decided to let my builder fabricate the turbo kit as I seen some poor welds and bad reviews on the supercar performance turbo kit. LME has the short block and Xona is building the turbos. The DSX atlas is ordered along with the Fore triple pump.
I have Frankenstein heads already. They should be good. I wound up going with the Xona 6469's. They should be good for north of 1200 wheel. Also decided to let my builder fabricate the turbo kit as I seen some poor welds and bad reviews on the supercar performance turbo kit. LME has the short block and Xona is building the turbos. The DSX atlas is ordered along with the Fore triple pump.
sounds like its going to be a very nice setup. The only hesitation on my part is it seems a twin turbo vette is harder to sell verses a maggy.
Cant wait to hear how it turns out. How much do you think this round will cost with the system installed?
sounds like its going to be a very nice setup. The only hesitation on my part is it seems a twin turbo vette is harder to sell verses a maggy.
Cant wait to hear how it turns out. How much do you think this round will cost with the system installed?
I'm thinking 35 to 40k, but that's also repairing the motor. The fueling is high too.
I cant wait for your report after it's completed. Good luck and it should be one heck of a nice car. You chose the best engine company for these engines.
Why are you using +30% DI injectors when you're also using an ATLAS? If it were me, I'd just use stock DI hardware that we know has excellent small-pulse behavior and use the PFI (Atlas) up top as needed. That last little of of added DI won't make a significant difference in knock resistance or power and you potentially have TONS of headroom with the PFI addition.
Why are you using +30% DI injectors when you're also using an ATLAS? If it were me, I'd just use stock DI hardware that we know has excellent small-pulse behavior and use the PFI (Atlas) up top as needed. That last little of of added DI won't make a significant difference in knock resistance or power and you potentially have TONS of headroom with the PFI addition.
I agree, My 30% overs have been up for sale for a bit. I already bought the stock di injectors.
Well, bad news today. LME said my block is shot. Good news is I get to do a 427. Bad news is I have another 100lbs on the front of my car. Going with the LTX block.
Glad to hear that you ended up deciding to build the car back rather than selling it! Any reason you are going 427 in what I’m assuming is an iron block vs a 390-408 in an aluminum block? I personally wouldn’t want to do a 427 if you plan on running heavy boost. I’m actually doing a 390 and built transmission as we speak as well and I’ll say imo you should go a few ci smaller and throw more boost at it, it will be much more reliable in the long run imo.
Glad to hear that you ended up deciding to build the car back rather than selling it! Any reason you are going 427 in what I’m assuming is an iron block vs a 390-408 in an aluminum block? I personally wouldn’t want to do a 427 if you plan on running heavy boost. I’m actually doing a 390 and built transmission as we speak as well and I’ll say imo you should go a few ci smaller and throw more boost at it, it will be much more reliable in the long run imo.
I've always wanted a 427. No particular reason that makes any sense, but it will give a little more grunt down low. This build isn't going to be anything I have to worry about with high boost. Twin 64's with a 427 shouldn't be crazy.
I've always wanted a 427. No particular reason that makes any sense, but it will give a little more grunt down low. This build isn't going to be anything I have to worry about with high boost. Twin 64's with a 427 shouldn't be crazy.
Yeah a 427 would definitely be cool, still I would feel a whole lot better going a little smaller just for increased reliability over the years. You are also better off with running turbos vs a supercharger though, so maybe it isn’t as critical in actual practice. Either way I’ll bet the build will be really cool, good luck!
The time has come! 416 and whirly birds
