Thoughts on LSA Blower + 416 Stroker???

[honda460ex]

For the last year I have been parts gathering and I finally gathered everything I wanted... So I thought... I had planned on doing the LSA conversion to my LS3 so I bought everything. Stage 3 BTR PD Cam, ZL1 fuel pump with electronic booster, 85lb injectors, 2.50'' blower pulley, etc, etc... Now that I am getting close to tearing it down I am getting cold feet about doing it without forging the bottom end. At first I wasn't going to forge it but my power goal of around 650 rwhp has concerned me seeing some others failures. I figure a bare LS3 block new is $1,500+ so if I destroy my current block I will likely wish I would have spent the money to forge it now instead. In looking at kits though it seems you can stroke and forge the LS3 to a 416 for just as cheap as forging the stock 376.

Thoughts or experiences with a 1.9 eaton matched with a 416??? Good, bad, the ugly? Would like to keep my compression near stock at around 10.5 to 1.

I figure my next problem will be fuel... From research it seems the ZL1 pump with a booster will be strained above 650 rwhp? And no meth, no E85. Not to many places sell that stuff around here so my tune would need to be 93. Like I said though, my goal really isn't over that limit but I'm sure once it's forged down the road I will tweak things including the fuel system.

Anyway... Thoughts? Experiences? Who has done this and what did your set up look like?

Thanks!

[smokum]

Mine runs awesome. 417 lsa combo. Made 721rwhp and 740rwtq at 10psi. Manual car.

[honda460ex]

Wow... That's awesome Smokum! I'm manual as well with the McLeod RXT waiting for the build.

If you don't mind me asking, what's your fuel setup and what compression pistons did you end up going with on your build?

[smokum]

Google adm performanc 417+ lsa blower and you will see my whole build. For some reason i cant link it to this.

[swiftkart]

For a goal of 650rwhp I wouldn't spend the money to forge a LS3, they are plenty strong to handle that and doing a forged 416 doesn't mean it wont break, a real good tuner is what you should focus on because a bad one will break any motor.

[1KillerSS]

Originally Posted by swiftkart

For a goal of 650rwhp I wouldn't spend the money to forge a LS3, they are plenty strong to handle that and doing a forged 416 doesn't mean it wont break, a real good tuner is what you should focus on because a bad one will break any motor.

+1

LS3 can do 650 all day long stock. People have motor failures at stock power levels. Truth is you have a comfortable margin. Spend the money on some valve train parts. Trunion upgrade, dual valve springs, pushrods and slap in a new cam.

[honda460ex]

I understand and agree it can handle it well but I'd rather insure the engine with a little better policy. I get it, forged can fail also, but if its put together right I think we can all agree that forged it stands a better chance for a longer period of time. Plus, like most, I get bored in time so who knows. I might turn the boost up later or do some head work. I do already have dual valve springs though, a cam, and im ordering beafier push rods once I tear it down and measure. Locally we have a good tuner that has lots of experience with LS engines, Cincy Speed. I have no doubt in them. Like I said though, I'm sure I'll tweak things in the future so I'd rather add a little insurance now. Just didn't know really how the combo with the stroker and LSA supercharger would be. Seems my search yielded most guys being n/a with the stroker instead of f/I. I'll Google that Smokum. I was curious to see a build or two with that set up so much appreciated. Thanks all for the input.

[10aSSee D]

Tell Tracy I said hi.

[honda460ex]

ha ha, will do!

[2010SSRSM6]

Originally Posted by honda460ex

I understand and agree it can handle it well but I'd rather insure the engine with a little better policy. I get it, forged can fail also, but if its put together right I think we can all agree that forged it stands a better chance for a longer period of time. Plus, like most, I get bored in time so who knows. I might turn the boost up later or do some head work. I do already have dual valve springs though, a cam, and im ordering beafier push rods once I tear it down and measure. Locally we have a good tuner that has lots of experience with LS engines, Cincy Speed. I have no doubt in them. Like I said though, I'm sure I'll tweak things in the future so I'd rather add a little insurance now. Just didn't know really how the combo with the stroker and LSA supercharger would be. Seems my search yielded most guys being n/a with the stroker instead of f/I. I'll Google that Smokum. I was curious to see a build or two with that set up so much appreciated. Thanks all for the input.

I was at 750rwhp with 83k miles on the car. I had 2 faulty oil pumps that helped end the life of one of my lifters that took out my Melling and crank bearings.

I'm currently forging with the factory bore (+0.040) using the LSA crank. The entire rebuild was about $2000 cheaper than going to a 416. The crank is about 60% cheaper than the Dragon Slayer (maybe more depending on where you look). And the front snout is made for a blower to be adding pressure to it.

I'll be running around 16# of boost when it's all said and done on E-85 and meth and should be close to 800rwhp.




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