402 ???????
Thread Starter
Instructor
Joined: Jun 2006
Posts: 199
Likes: 0
From: Sterling hts. MI
402 ???????
I was intrested on a 402 for my c6
Which way should I go.
1) Buy a built short block from our supporting vendors?
2) Purchase my own block & rotating assembly put it together?
if #2 what brands do you recomemd for a rotating assembly?
Thanks for your help in advance
Which way should I go.1) Buy a built short block from our supporting vendors?
2) Purchase my own block & rotating assembly put it together?
if #2 what brands do you recomemd for a rotating assembly?
Thanks for your help in advance
Le Mans Master
Joined: Dec 2002
Posts: 7,588
Likes: 6
From: Montreal Qc
It depends on your skills and confidence.
Even if you are able to build it yourself, a reliable builder probably has more knowledge in doing the job correctly and you may even get a warranty on the engine, something you will not get doing it yourself.
Even if you are able to build it yourself, a reliable builder probably has more knowledge in doing the job correctly and you may even get a warranty on the engine, something you will not get doing it yourself.
Drifting
Joined: Nov 2002
Posts: 1,651
Likes: 125
From: laguna niguel ca
Forget the 402's it's a dead animal
Using the new L92 block; bore 4.063 and a 4 inch stroke you've got a 415 inch motor. Add a 4.1 inch stroke with a little more clearence work and you've got a 427. Using the L92 heads and L76 intake,and you've got a great package. A&A corvette is putting one together for me as we speak. I figured that at this time I didn't want to throw $25,000 at a new Z06 to have a decent car payment, so I thought of making my C6 a road monster and keeping it a few more years. I put over 20,000 miles a year on my C6 so my motors have to be driver friendly. Andy Green built my C6 LS2 into a 461rwhp daily driver, and it is. This new one will be a big step up yet still be driver friendly. BTW the L92 blocks are are only a few hundred more than the LS2 blocks, If that. Think about it!
Racer
Joined: May 2006
Posts: 371
Likes: 0
From: CA
Wow, I have been weighing a number of options for upgrading my '06 and stroking mine to a 402 w/L92 & L76 intake was one of them, FI was the other.
I have read a few other posts talking about going to the L92 block.
I would prefer NA since, like you, I average over 25k miles a year.
What kind of rwhp are you expecting to get from the stroked L92??
If we change to the L92 block what happens when its time to smog it.
I'm in Ca as well...
Do they match vin #'s from chassis to block??
Just curious...
Keep us in the loop on your build up, it sounds like it will be fun
I have read a few other posts talking about going to the L92 block.
I would prefer NA since, like you, I average over 25k miles a year.
What kind of rwhp are you expecting to get from the stroked L92??
If we change to the L92 block what happens when its time to smog it.
I'm in Ca as well...
Do they match vin #'s from chassis to block??
Just curious...
Keep us in the loop on your build up, it sounds like it will be fun
Drifting
Joined: Nov 2002
Posts: 1,651
Likes: 125
From: laguna niguel ca
Wow, I have been weighing a number of options for upgrading my '06 and stroking mine to a 402 w/L92 & L76 intake was one of them, FI was the other.
I have read a few other posts talking about going to the L92 block.
I would prefer NA since, like you, I average over 25k miles a year.
What kind of rwhp are you expecting to get from the stroked L92??
If we change to the L92 block what happens when its time to smog it.
I'm in Ca as well...
Do they match vin #'s from chassis to block??
Just curious...
Keep us in the loop on your build up, it sounds like it will be fun
I have read a few other posts talking about going to the L92 block.
I would prefer NA since, like you, I average over 25k miles a year.
What kind of rwhp are you expecting to get from the stroked L92??
If we change to the L92 block what happens when its time to smog it.
I'm in Ca as well...
Do they match vin #'s from chassis to block??
Just curious...
Keep us in the loop on your build up, it sounds like it will be fun
Drifting
Joined: Dec 2006
Posts: 1,961
Likes: 0
From: Lake Elsinore CA
Charlie who tunes for A&A thinks that with a street friendly cam say 230/234 or 232/236, power could be in the 510-525rwhp range. Still idling smooth with a slight loop, and still get good gas milage. As for smog testing, No one cares what block is in the car, as long as it passes the visual and the sniffer you're in business.
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Drifting
Joined: Feb 2007
Posts: 1,446
Likes: 0
From: Cranford NJ
A 402 would be a very nice addition, but unless you know exactly what you're doing with LSx motor I would leave assembling the short block to one of the vendors. There are quite a few tricks to these motors that you only pick up with experience. It's not the same as slapping together a good ol' small block 350.
Give us a call, we can steer you in the right direction on whether you decide to build it yourself (what parts combination you should go with, etc) or decide to have it built for you. 908.317.4496
Here's a link to a 402 we just finished for your entertainment:
http://www.cartek.net/videos/cartektta4c6.wmv
Max
Give us a call, we can steer you in the right direction on whether you decide to build it yourself (what parts combination you should go with, etc) or decide to have it built for you. 908.317.4496
Here's a link to a 402 we just finished for your entertainment:
http://www.cartek.net/videos/cartektta4c6.wmv
Max
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Charlie who tunes for A&A thinks that with a street friendly cam say 230/234 or 232/236, power could be in the 510-525rwhp range. Still idling smooth with a slight loop, and still get good gas milage. As for smog testing, No one cares what block is in the car, as long as it passes the visual and the sniffer you're in business.
The L92 block is 300 more than the Ls2 and it fits the L92 heads optimumly with less shrouding of the valves. At 416 as a stroker, getting good compression is easy. If you use those heads specify psitons with the correct reliefs.
Andy built my 348 forged motor in my C5 and it was such a great running motor. When I was first priming it without spark plugs in it during the install, it was spinning so smoothly, I couldnt tell it was spinning. Highly recommended shop.
