New Motor
 

Well, I did it. I expect it will take at least 6 weeks to build/ intstall/ tune.

-LS3 based 418ci forged everything
-ETP 215 Heads
-FAST 90
-factory compression ratio
-Big ass cam (i.e. bigger than my old one)
-kooks 1 3/4 headers

Crossing my fingers for low 500's at the wheels:drink:.

Good luck Carlos. Keep us posted on the progress. That should be one badass motor.

Sounds like too much fun!!!

:drool2:

And make sure we get some video when it's done. I want to here it!

That 418 LS motor will run hard. Good job.:drink:

Word. Are you considering an Acuusump?

Yeah. The guys at vette doctors are looking a a moroso road racing pan and maybe the accusump. It all comes downto the price accusumps aren't very expensive, but I don't have a very high sealing on this one.

I'm not doing anything here but writing the check. I'm hoping to have a motor that will last a LONG time.

I'm sure it will. :beer:

The good news about the pretty inexpensive Accusmp is that the pre-oiling alone is probably worth the price in longevity, to say nothing of helping to alleviate starvation situations. :huh:

I've actually talked to the manufacture of the Accusump, they claim it works as stated. Never talked to anyone that has had one, but if it does as claimed, it is worth it.

I had a friend with one on his 240Z autocrosser back in the late 70's. It seem to work well. The pre-oiling feature should help durabilty since most of the engine wear is startup.

Bob

Cost growth. So before a wrench is turned it looks like the new estimate is $15K. There are just so many little parts and virtually nothing is re-usable.:barf:

So the "LS" family is not actually a family?? Sad:rolleyes:

You're getting into pretty serious money territory here. Almost sounds like you could have a DART Block/ LSX build for that kind of scratch. . . :huh:

I'm sure they could reuse stuff. But you're spending so much anyways might as well start fresh and get a new engine.

Ask for all the old pieces, check them out and E-Bay the good ones individually. Pick a few of the rest for souvenirs.

Hell, get an LS-9 crate, and do it yourself.

Some stuff is reusable some is not because of the aftermarket bits and LS3 changes. I'm going to strip down the block and sell what id still usable. I'm hoping that I can find a shop that will be willing to work on the heads.

I'm shocked that the cadillac LS9 is ~$15K, but the zr1 is ~$23K.

The Cadillac version is the LSA and doesn't have forged pistons.

ok, know please explain the remaining $7K

It also has a smaller displacement blower and is wet sump instead of dry sump.

I really want a ride in this car when it's done. This is going to be the nastiest NA street motor I've ever seen.

Well it's finally done. I really happy with the results. I didn't have the money for the ETP 215 heads so we went with some heavily ported GM L98 truck heads. My old fast 90 was also completely fucked from the engine scrapnel hitting it so I am running a port matched LS3 manifold. With these short falls Vette Doctors Performance was still able to get 531 rwhp and 508 rwft-lbf. These stroker are awesome it makes 400 ft-lbf at 2500 rpm. Torques does start to fall off at 6000 rpm. I think it's due to the stock intake manifold. Looks like I need to start saving money for a new one from injector's plus. I have to be a little carefull. I'm going to try to drop weight this winter and if I make my weight goal (3000 lbm car and driver) than I'm limited to 542 rwhp on a dynojet dyno (current numbers from a land and speed dyno). More than that and I get pushed into TTR.

Congratulations Carlos, those are great numbers. Where did the engine make peak horsepower and peak torque. I'm guessing that with the stroker 418 that it has a pretty wide power curve.

The torque curve was super flat. Peak power was around 6200. Peak torque was a bit lower like 5600. I will scan and load the the graph tomorrow.

Peak torque at 5600 and peak horsepower at 6200, man that manifold and maybe heads are holding it back. What are the specs on the cam?

Sweet!

:cool:

I predict a speeding ticket at least within the month. Just make sure you don't lose your license.

The new chart

Dude that's awesome! I think that's within shouting distance of a ZR1 with *just* a 418 NA. :hail:

I agree, whoever ported those heads knows their stuff. Heads are where the money is at, and if these guys could pull that off by porting just stock heads, they rock.

That chart looks great. I still want to know the specs on the cam but there is about 1100rpm between peak TQ and peak HP. I don't think the manifold is holding back all that much HP.

Baddass, hyraulic lifters? If so, I'll bet your springs are too light. Prob why your power drops off before you're expecting it to. Go with some solids or heavier springs or a hydra rev kit if someone makes one for the LS.

Or were your springs already matched to the cam?

I would think even a stock motor with good exhaust would peak higher than that.

Yeah, your hp tops off at 5700, somethings up. I'll bet that motor's got something left, it wants to scream.

Even the LS2 peaks at 6K, my money is on the valve springs.

Yeah I need to find out what the cam specs are. It could be any number of things. The reality is though that this is more HP than I was expecting. This is what I was hoping for with the ETP heads and the FAST manifold. It's going to stay this way for a little bit while I great the rest of the car up to speed.

Ben ZR1s only put like 505-520 hp down from the factory. I am definitely making more power than a Zr1 (stock) and am about 100 rwhp up on a stock Z06.

Next mods:
LG motorsports GT hood
LG motorsports GT2 wing
APR front air dam
APR front splinter
Breathless performance Rear diffuser
LG motorsports CF GT2 seat

I am going to try to get these mods done by 2011. In spring of 11 I deploy for six months and That's when I will drop the car off at some shop to have the cage built.

I stand corrected. For some reason I had 550WHP on the brain. Maybe that's for a slight mode. Anyway, curious to hear your cam specs, etc. Sounds like this really is basically a race car now. Doesn't sound like something you'd really go on a long easy cruise with anymore. And I think C.A.R.B. has special torture chambers for your kind now.:judge:

So it's been a week, how does it run?

Been busy. The New motor was over powering the z06 clutch in my car. So now it has a twin disc McCleod clutch. Much stronger and more durable. Other than that the car runs great. I had a new disc installed with the new motor, but it wasn't enough. I haven't had a chance to do any quantitative analysis yet though.

What about the seating process for the disc? We just got a McLeod setup for the Snake and it says to do normal stop and go driving for 500 miles before giving it full power. That's slightly concerning in our case because it's an off road only car. How the hell I'm supposed to get 500 miles stop and go before giving her the beans.