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I currently have a HCI build on a 2002 camaro M6, I have a Torquer V4 cam, Ported and polished 243 heads, ls7 lifters, comp trunion, etc, etc with a ported fast 92 and 92 throttle body, stock bottom end. I will want to run a 150 shot on the new bottom end. I am looking at the CNC 402 or 408 Aluminum blocks with nitrous pistons. My question is, How well do you think my top end can swap over to the new short block, i would only plan on changing the cam out for a larger one. and i defiantly want to have atleast 450rwhp without nitrous. I have 440/380 right now but plan on getting the s60 rear along with the short block and know they have a 5% or so hp loss for the rear. Curious what you guys think and what power numbers. yes I've used the search, most of the ones i see just turn into arguments about bottom ends. no i don't want an iron block. Thank you in advance!!
Maybe im missing it, cause I'm not seeing where it specifically states that the 408 is aluminum. Btw the only way to make that happen is to resleeve it
I would want to as well, I'm just asking for a budget perspective. Would they work well and what would be the power gain, if any from a stock bottom end to this spec 402.
I hear what you are saying, but the way I'm seeing it is a 402 only in aluminum. Regardless, I see these are 13.1:1 to 13.8:1 compression, so I assume you'll be running race gas or alcohol of some kind?
Ok cool. Well with that said, the added compression with E85 alone would be a nice bump in power even with the same HCI. But since you're talking a bigger cam, you'll gain a bit more too. With proper tuning I bet you could gain 40-50 hp If I had to take a wild guess. The combination of added timing and compression will be a big jump over what you have now, and E85 will only further enhance that
Fantastic thats great to hear, The v4 cam is great for the street, I have to do my research on cams but am looking for a steetable cam but defiantly larger than the one i have now, curious how an MS3 would stack. but how do you like your wet kit from NX? I have been looking at ZEX recently.
The extra cubes from that 402 will soak up quite a bit more overlap from the cam. You could go a bit bigger than something like the MS3 cam. That's not a whole lot bigger than what you have now. I assume you're planning on nitrous with this setup? My NX kit cam with the car when i bought it 5 years ago. As far as I can tell the kit is a good 15 years old by now. I've never had a problem with it. It's just a basic single nozzle wet kit, and i'm only running a 150 shot. What size shot are you looking at doing?
Good deal, Yes I'm looking for nitrous, atleast a 150, would like a 200 wet, not sure on how much stress that will make on that block, I'm going for decent (as good as you can) reliability with nitrous.
I would defiantly be willing to do more, like a 250-300. Just curious how the bottom end will handle it. Also, how do you feel about that block? its better priced than the high end builds for aluminum.
Well it has forged components so it should easily handle that amount nitrous. As far as the company, I've never heard of them, so I can't really comment. Seems like a good price though. Did you check Thompson Motorsports too? Back when I bought mine they had the best prices I could find
I would read the BBB reviews. According to one customer's review the engine blew up after 23 laps and CNC left a message nasty message written on the windage tray. The other review is interesting too.
Some of the stuff like cylinders didn't appear to be honed....probably 80% good & 20% bad
Time to ask..
Getting burned on an engine purchase is about as much fun as staring down the wrong end of a Magnum. I got burned once by Doug Herbert performance who was local to me. Burning $4500 in cash would have been more fun than dealing with DHP.
Best of luck with the new motors.
My impression & opinion based on a brief Internet search is CNC might be OK for simple parts.
No way I would buy a short block or engine or crank after what I read.
If you are local to CNC then you might be OK.
A lot of businesses do better taking care locally than someone a thousand miles or more away.
I'd be happier spending more at Lingenfelter Performance or Thompson Motorsports, Scoggin Dickey Performance Center or Texas Speed or Reher - Morrison or Bischoff Engine Service or other good LS1TECH vendor a and not worry. All of the ones named have a good reputation.
Last edited by KCS; 11-01-2018 at 08:02 AM.
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10-31-2018, 05:51 PM
my top end on CNC 408 or 402 Aluminum block 
