[roswald0511]

What is needed to put 6.1 heads and intake manifold onto a 5.7 based stroker?

 

[roswald0511]

bump

Posted via LXFMobile

 

[Hemi31]

you need something to drop the compression first of all.Either a ported chamber or thicker head gasket......otherwise your dealing with 11.8:1 compression.

 

[ujokin2]

Doesn't Jason have the setup now on his 383 ? I know he has the 6.1 Ported intake.

 

[USCG Charger]

I have 6.1 large chamber heads to make it work on my stroker..... Some on here might not agree but stu and feel the 6.1 top is better vs the 5
.7 top oñ our strokers.

 

[HEMI~C~]

Been here, done that.............but the tuning wasn't really there yet to support that sort of compression. Quite a few guys running 11+ compression now and with more control over the timing/fuel curves, adjustable cam timing its certainly possible and maybe even beneficial.

Would be nice to see how it works out with proper tuning.

http://www.lxforums.com/board/showthread.php?t=45760

 

[392Stu]

I think the key here is he's asking "stroker" so custom pistons are used and I can make the CR whatever is needed and match the reverse dome to the chamber of the 6.1 head. I used big chamber heads in Jasons case because we didn't know if he was going 6.1 or 5.7 heads when the pistons were ordered so I set his engine so we could run big chamber 6.1 heads or 0.020 milled 5.7 heads and keep about the same CR either way.

That being said all you need to do is spec the right custom piston, switch the exhaust manifolds and corresponding exhaust to work with the 6.1 ports and tune for the new engine, so EGR delete and a tune. Use 6.1 pushrods and 5.7 head gaskets.

 

[roswald0511]

Thanks for all of the info guys.

I was looking into a:

5.7 based 400ci w/9.5-10.0 compression
6.1 heads
6.1 intake manifold
226/232 .589/.600 112lsa
American Racing longtubes

 

[392Stu]

On the 400 stroker it's just a matter of ordering the pistons with the desired compression ratio and getting the 6.1 head and intake cores. Why the low compression ratio? looking at boost down the road?

 

[roswald0511]

Yes sir, that is also why i biased the exhaust side a little too. Either a Techco or a whipple.

If I was building it all motor than it would have been in the 11.0+ range with a 111lsa or lower.

 

[392Stu]

112 is as tight as I've gone so far. Hemis are a bit differet than wedge motors in that regards. If the duration is very high that tight of an LSA may be a bear to tune.

I know our tuner LAFRAD wanted a 111 LSA on his cam and I ordered a 112. At this point I think he's glad I did but I'm sure he'll chime in.