Friend told me he saw a supercharger from a 96 V-6 Camaro sell on Ebay today.............? First off, a 96 is a 3.8 right? Is the 3.8 the same block as our 2.8/3.1? He says yeah but I'm inclined to disagree. Also...do the 305's, 350's, and small block 400's all share the same block?

 

3.8 is 90 deg block where the 2.8-3.4 is 60 deg block, totally different.

 

Didnt even think about that..good..I'm right! Alright then..what about the 305's, 350's, and 400's..he claims those are all the same block too. He's buying a small block 400 to put in his 84 T/A.

 

is he getting the whole engine or just the block? if just the short block, he will either need to:
a) get 400 heads for it
or
b) have steam holes drilled into the 305/350 heads.

and yes, there is/are kits for the 4th gen 3.8 cars, even one on the way for the 3.4 . hint hint

 

I think he's getting new 400 heads, and he's porting and polishing them...

 

hey,
the 305, 350, 400 blocks are different. they all look the same from the outside, but have different bore sizes. This is what determines the displacement (along with crank stroke, etc). There is no way anyone could bore out a 305 to a 350, and no way to bore out a 350 to a 400. You can tell apart a 400 from a 305-350, by checking if it's got three freeze plugs on each side of the block. That's the most common way to tell them apart.

 

Thanks for the info... FYI..what's the most you can bore and stroke a 350 out to? I've heard 392 somewhere... And how about a 305? 347 stroker? (Or is that a Ford motor..I really don't remember anymore....damn short term memory loss)

 

not too sure about the 350, but it should be around that area, as for the 305, PowerHouse sells a stroker kit which can put 335ci.

about the boring, i've heard that over .060 should be the max a block can be safely bored out to. Oh and 347 is Ford. glad i could provide some info.

 

Alright..thanks man. I had that feeling about the 347.. I hang out with too many d*mned Ford people in the morning..only person that likes Chevy besides me in the group is John, who drives a Saturn...which is basically a GM car... Lol. As for now, I'm the GM flagship in the group.. Sad eh?

 

bore | stroke
xxxxxx 3.00" 3.25" 3.48" 3.75"
3.736" 263 .. 285 .. 305 .. 329
3.875" 283 .. 307 .. 328 .. 354
4.000" 302 .. 327 .. 350 .. 372
4.125" 321 .. 347 .. 372 .. 400

305 engine 3.48" stroke & 3.736" bore
334 (305 stroked and bored) 3.75" stroke & 3.766" bore

350 engine 3.48" stroke & 4.000" bore
383 engine (350 stroked and bored) 3.75" stroke & 4.030" bore

i hope this helps


-mike (loomdog)

 

as far as installing them is concerned, they are the same.

 

Loom...are those the maximum safe bore and stroke #'s for each engine?

 

The numbers he gave are with a .030 inch overbore. Someone up above said it earlier... for a reliable street engine that doesn't overheat, .060 is about it for a small block chevy.

 

yup.. those are .030" over.. thats the most I would bore a street engine out to.. i have seen a couple 350 rebuilds that were .080" over that lasted a long time tho (they were very very pampered engines before and after the rebuild tho)

 

.080 over? Christ....that's just..scary....

 

one of the .080" rebuilds is in a 67 silverado 4x4.. that truck can, will, and has pulled many stumps.. it belonged to a friend of mine dads that used to race at the local oval tracks (1/3 mile.. madera raceway).. it was traded for a 70 elky ss w/ 454.. the truck went 10k miles after trade w/ no maintaince and engine blew, overheated (250k @ rebuild, 136k after rebuild).. if u maintain it, it will last forever!!