dover Posted November 30, 2010 Report Share Posted November 30, 2010 What are some of the capabilities of a stroked 408 with worked LS3 heads. Mods being: victor JR style intake 102mm throttle body from nick williams eagle crank eagle h beam rods Probe forged dished pistons all arp head studs, rod bolts and main bolts clevite bearings High volume melling oil pump comp cam 238-248, 586-596 All new lifters and double valve springs and hardened push rods piston rings are total seal moly 80lbs injectors fast fuel rails ...Also has an F1A Twin Intercooled Procharger kit I just need to know pro's and con's. And what kind of power the car should make with this setup. Is the motor setup well? (I didn't say built, I am asking if the parts listed equate to a solid stout motor) Car would only 99% of the time see pump gas/E85 and low boost. Quote Link to comment Share on other sites More sharing options...
TurboNova Posted November 30, 2010 Report Share Posted November 30, 2010 new to the lsx world but wouldnt those injectors be limited to around 7-800 rwhp on e85 Quote Link to comment Share on other sites More sharing options...
AWW$HEEET Posted November 30, 2010 Report Share Posted November 30, 2010 from what ive researched, you dont need a ton of cubes to make sick power on an LSX application. just do a forged 346 and add boost. Quote Link to comment Share on other sites More sharing options...
I Eat Rice Posted November 30, 2010 Report Share Posted November 30, 2010 I have read anywhere between 700 and 1000 hp is the limit for that block. Pending on your boost levels 600whp is not going to be a problem for you to make at all with that set up and that would be a reliable 600+ whp too. Quote Link to comment Share on other sites More sharing options...
GSXRAntwon Posted November 30, 2010 Report Share Posted November 30, 2010 Well stock LS3's with that blower are seeing 600-650+ on pump in the Vette's FWIW. Quote Link to comment Share on other sites More sharing options...
TurboNova Posted November 30, 2010 Report Share Posted November 30, 2010 600whp should be easy. People are making reliable 550-600 whp on the stock truck 5.3 lsx with rod bolts and a ls6 cam with a small turbo and high boost. Look at parish turbo fairmont that went 9.50@140's with a mp t70 Quote Link to comment Share on other sites More sharing options...
Sam1647545489 Posted November 30, 2010 Report Share Posted November 30, 2010 Keep the mustang. Quote Link to comment Share on other sites More sharing options...
GSXRAntwon Posted November 30, 2010 Report Share Posted November 30, 2010 Keep the mustang. Ill second that. Maybe put an LSx in it for reliability tho :bangbang: Quote Link to comment Share on other sites More sharing options...
evil8 Posted November 30, 2010 Report Share Posted November 30, 2010 Biggest problem on boosted LSx engines is burning #7. The vic jr might help that according to some. Whats the rest of the fuel system? Quote Link to comment Share on other sites More sharing options...
brent1976 Posted November 30, 2010 Report Share Posted November 30, 2010 My 6.0l with a similar bottom end, good heads and cam, and a stock truck intake with a 76mm turbo made 62xhp/64xtq @ 15psi. That was through an 80e with 4x4, so it's more like 30% dt loss instead of 20% in a car. We stopped there because of alternator problems, and I haven't had a chance to get the tuning finished, but there is more in it. Mine is a dd on 8.5-9psi most of the time without a hiccup so far. That engine has more cubes, and better heads, so the power just goes up from there. The only thing I see that would be a con is that cam is not perfect for fi, but it would sound awesome, so you could probably crank up the blower a little to make up for all that overlap. I guess it also depends on what you consider low/high boost is. Quote Link to comment Share on other sites More sharing options...
Shmaa Posted December 1, 2010 Report Share Posted December 1, 2010 Biggest problem on boosted LSx engines is burning #7. The vic jr might help that according to some. Whats the rest of the fuel system? Do you speak from experience? What's the cause? Quote Link to comment Share on other sites More sharing options...
I Eat Rice Posted December 1, 2010 Report Share Posted December 1, 2010 Biggest problem on boosted LSx engines is burning #7. The vic jr might help that according to some. Whats the rest of the fuel system? I read the same thing on LS1 tech. I also heard with the higher hp levels ie above 700 the ls3/l92 heads were having problems holding high boost. They were pushing water and or lifting the heads. The ls3 is virtually the same block as an ls9. The ls9 makes what 650 hp so I will go with what I said earlier you should be good for 600hp easy. I have read that people were making 900 to 1000hp on this block but that seems like alot of power for an aluminum block. May be just me though. Quote Link to comment Share on other sites More sharing options...
evil8 Posted December 1, 2010 Report Share Posted December 1, 2010 I have burnt #7. Some think that the LSx designed intakes feed #7 the most air because it is the last in line. Air hits the back wall of the intake and shoots straight to 7. This extra air in the cylinder will cause 7 to go lean and burn. There is also thoughts that the steam crossover tube running from head to head in the rear (or lack thereof) is also an issue. Early LS1's with the LS1 intake had front and rear crossover tubes, however the LS6 intake won't allow for the tube to run forward under the intake. I am running a shit ton of meth and am crossing my fingers that the meth will fill 7 just like the extra air. Quote Link to comment Share on other sites More sharing options...
Linn1647545492 Posted December 1, 2010 Report Share Posted December 1, 2010 That is going to be a heavy car. Iron block cars with FI is 3600+ pound whales. Quote Link to comment Share on other sites More sharing options...
AWW$HEEET Posted December 1, 2010 Report Share Posted December 1, 2010 iirc you dont need an iron block unless you are making insane boost. the only reason people go with lq4/lq9 are a few added cubes and they are cheap as dirt compared to ls1's. a side effect is you get an iron block, but the pistons, rods/rod bolts would grenade far before the block is even close to its limit. Quote Link to comment Share on other sites More sharing options...
Cordell Posted December 1, 2010 Report Share Posted December 1, 2010 I would think with an F1A the car would be over 700 wheel, but at that level I would have sprung for something a little better then Probe pistons and Eagle rods. If it's in a GM car I'd be more worried about the drivetrain. Quote Link to comment Share on other sites More sharing options...
Slomo Eric Posted December 2, 2010 Report Share Posted December 2, 2010 Ill second that. Maybe put an LSx in it for reliability tho :bangbang: :funny: Quote Link to comment Share on other sites More sharing options...
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