I hope so, I'm boosting a 10.4:1 408 this month

Atomic ran 11:1 and 8psi on his 410.

 

And it blew up

 

.040 head gaskets have been ordered. I hope it's the right choice. Anyone looking for some unused .051 MLS gaskets?
Oh yeah, I forgot about that...

 

subscribed!

 

And I blew up a 9.5:1 engine on 8psi.

And I run 10psi on my stock 10.9:1 LS2 all day, no meth and no problems for 2 years.

I found a good tuner...that's really what it's all about.

 

Didn't he overboost it once, untuned?

 

The stroker with the blower ate itself because the builder didnt measure the journals on the crank correctly and it ate a bearing. Nothing to do with the actual setup.
That was on the turbo rig, went to over 20psi untuned IIRC

 

1slow, thanks for the extra info, that gives me some added reassurance. I think I'll be happy with the higher compression and the extra squish at 9.92:1. It'll make it snappier all around. We have a great tuner in town here so getting it set up properly should be no problem. Now to find some injectors. Anyone have some 60 lb'ers laying around?

 

I really wouldnt mind running a setup like what atomic did with his 1900 and 408 one day. The high CR blower setups seem to be the most fun to drive which is what Im after, I dont care about all out numbers. I like all of my power to be there right now when I hammer, instant gratification is much more fun

 

I agree. A few reasons I built a 383 over a 408 were:

1. I already had the heads. They would have been too small for a 408 and too big for my 5.3
2. I didn't want to max out my blower. It's more suitable to a 383 than a 408.
3. I wanted some semblance of fuel economy. This is the truck I commute with. It's a short commute but I do drive it around town.
4. the 5.3 blocks are so easy to find, and cheap. I got the whole engine for $200 and have sold a few parts from it to further offset the cost.
5. Everyone's doing a 408. I know it's an excellent engine but I like the size of the 383. It's halfway between the 6.0 and the 408 and it's different, especially with a blower. Not many guys have done one.
6. It will have some awesome torque, bar none. Especially if I upgrade to a TVS2300.


I know there aren't too many good reasons for building a 383 over a 408 but now that I have it I'm glad I built it. There's a kid in a town nearby that I know and he just built a 383 Vortec for his '98 4x4 Sierra. He thinks he'll have a good chance against mine even after I'm done the swap. It's a nice truck, but boy is he in for a surprise this summer.