Hi guys
I just wanted to make a new thread about my first home build

here is my Vette
C5 2003 50th anniversary convertible whith complete Z06 suspension and drivetrain and MN6 gearbox
LS2 402ci NA


best 1/4mile time so far is 11.16@126 but that was whith bad top pistons rings on 4 pistons, had a lot of blowby was 20% less compression on them 4 cylinders then on the others.....
The reason for that is last spring i had a bad knock :smash: so bad it broke one of my piston and made a deep crack in one.
It also looks like in two other pistons a small piece from the broken piston had hammered them a lot.
but for some reason i canīt understand i juste swapped out that 4, but that was a mistake because the rings was crushed/hammered on them all :yesnod:






And then after few months of driving and some drag racing with alot of blowby i spun a bearing!!


so the engine had to come out :ack:


but what i saw was this: a crack in my Crank, seems like a little piece broke out of the small crack and then offcourse the bearing was gone that my guess !!



And i saw the piston where all scratched too and the sleaves had bad marks in them.....
My motor was trashed.....


All the top rings on the 4 pistons that had not been swapped out was like this

So i went whith the block to my local machine shop
they did a .005" clean up on the sleaves (didnīt wante to take more off)
And ordered from Jon@TSP New pistons (.005" bigger) Wiseco 4.010" -10cc, and i needed two new rods they where damadged after the bearings
The Crank i got claimed.
TSP helped me out there, but i needed new ballance for it offcourse, so TSP arranged that for me too.
and then i bought all new bearing and gaskets!!!

So itīs time for building me a 404ci :thumbs:


LS2 block after clean up



Pre assembly, check bearing clerance


Had one here build me a Tourq-plate



gaped the rings for NOS


Final clean up for the final assembly




NEW Eagle 4340 steel crank 4.00" stroke install



New TSP Wiseco 4.010" -10cc dish pistons + Eagle H-beam rods 6.125"

Wiseco GFX steel top ring 2nd napier






Shortblockīs asembly finished LS2 404ci

Baezi

 

CAM install TSP TX-Giant 248/254 . 615" 622" 114LSA (110ICT)









blocks covers on and LS7 lifters and liftertrays....


oil pan

ARP head studs


Doubled checked the PVC

Bolt on the Trick Flow 215cc heads 59cc opened up to 4" for bigger bore and the Harland sharp rockers 1.7


FAST 92mm ported intake LS2 90mm TB ported (gt500 bosch 53lbs injectors)

LS2 404ci Longblock Ready=D>

so no i need to find time to throw it into the car v:yesnod:

Baezi

 

Nice work! Will be interested to see how she does at the track.

 

That thing should be a monster on the bottle.

 

Thanks for the nice photos.

 

Dident know you cojld make a 404ci out of an ls2. I thought 402 was the max

 

hi

thanks for good comments

In LS2 you can go from stock 4.00" bore all the way to 4.020" also you could go 4.030" but then you would be pushing it.

TSP did not recomend to go higher then 4.020" in bore, but i only went from 4.005" to 4.010" because iīm gona try give it a bit of nitrous

in LS2 whith 4.00" crank:
4.000" bore : 402ci
4.005" : 403ci
4.010" :404ci
4.020" :406ci
4.030": 408ci

so iīm 0.10" over stock.....

Baezi

 

So next thing is putting the Motor into the car, it tooke only one day
here are the results.....


a car lift is a must.......



Rear Craddle down first whith Diff, tranny and tube...


Then Rear Craddle down and Spec 3+ Clutch installed and the bellhouse


Motor on the Craddle

Kooks 1"7/8 long tubes under



Lower the body on the Motor

there iīm going over the electric wires

Now things are getting fun.....



Both craddles are now under


Now the Exhaust The Kooks goes to 3" Xpipes

And then to 3" Dual pipes to a QTP dual 3" Cutouts after that itīs Z06 Titanium catback


This is how it looks now under the hood


Joe Gibbs break in oil

And then the first startup http://www.youtube.com/watch?v=ZVv-7JquMTs

thanks a lot

Baezi

 

Sounds good.

 

Nice work man,thanks for the show and tell,

 

did you use solid lifters(modified factory) during the claying,, otherwise your results are useless

 

Yup. If its not solid the lifter isn't pumped up.

 

The PTV clerance is plenty, iīm running -10cc dish pistons, was running -8cc dish before, i knew from the past it was enough the cam has plenty of overlap, this was more to double check.

The LS7 lifters was just soaked in oil few days before and then installed and measured

Baezi

 

at what gap did you set you pistons rings??

 

Is there a way to turn the lifters into a solid lifter in order to check PTV clearance and degree the cam?

I have 2 lifters that I thought I would TIG weld the cup but it's more difficult than I first thought.

 

Top Ring > .026" 2nd ring : .028"

You donīt need to have the lifters pumped up when you degree the cam in, but it needs to be pumped to get accurate readings on PTV clerance

Baezi

 

Awesome, I love seeing people build their own engines Like to see the dyno/track numbers when you get them. Should be a real screamer

 

My question still stands, is there a way to modify a hydraulic lifter in such a way that the plunger is locked?

 

Yes you disassemble the lifter and add spacers to make it a solid so it wont move. i would use an old spare lifter laying around.

 

Any Updates Baezi I'm Doing a very similar set up and wanted to know what kind of numbers your making. Track times look great.