Finally ran our 392 Gen 3 Hemi today...

We made 695HP and 530TQ with it...6.4 heads, 12.5:1, custom IMM cam, stock rockers and lifters...used a 1050 and drag pak intake.

It was fun using the MSD and no leaks!! Really neat sounding engine, very quiet even at 7500rpm.

https://youtu.be/m2z18MC7hbg

https://scontent-lax3-1.xx.fbcdn.net/v/t...amp;oe=58D03A26

https://scontent-lax3-1.xx.fbcdn.net/v/t...amp;oe=5886E709

Nice!

I am happy to hear this. Any drama with the MSD?

Yeah quiet as a kitten lol! Much work to the heads? Is that a truck engine?

Nope, worked flawlessly!

Lightly ported them, kept the oem sizes but switched to Manley valves...5.7 truck block and 6.4 heads.

Right On!!

WOW. Almost 700 HP with no tricks. Sounds like a basic set up well thought out. Can you share any more info.

Very nice! Would like to see specs on the build also. What are you running for a rotating assembly? Those TTI headers?

Yeah Brian im wondering if you tried a Dominator or not or if this is for a customer or your own test mule. I have a set of Apaches and have been wondering if they would be a big enough jump over CNC'd 6.1's to bother with. Im concerned also if the 2.14 intake valves will clear my older Manley pistons valve relief's. I will get the Apaches CNC'd eventually but its a toss up by who, MM,BES or Thitek all do them and claim 380-390@.600 lift which would be a 30cfm jump over the 6.1's. My 6.1's would be perfect for a turbo build later.

Be nice to see one of these engines go in a 2800-3000 pound car instead of a 2 ton brick to see exactly how well they run.

I am working on it Pittsburghracer, but work keeps getting in the way.

I hear ya. I have a few scrap-yard hook-ups on quick dial just in case I ever want to wonder in this direction. I don't really see it happening but never say never.

its nice to keep seeing more hemi's being built. What rpm was peak hp and tq?

Working on it

How are these blocks and oil pans for putting engine diapers on them. Anything faster than 10.50 needs a diaper on it now at my local track with more tracks joining every year. I had to make 2 header tubes on my LA style Hedmen headers this year to get mine on.

We used a Scat crank and rods, Diamond pistons. The TTI headers were a bit large for this engine at 2" with a 3.5 collector, so with the customers header (1 7/8 step to 2" with a 3.5 collector) plus the E85 the TQ will be closer to 560's...we used C12 fuel...this was with a 1050 dominator as well.

Cam is one that I spec'd, sorry no details for now. Peak HP was 7200rpm and peak TQ was 5700rpm.
The heads were used because of the E85 as this tends to make the heads intake ports smaller because of the mixture ratio.

I did the heads, they flowed 370 cfm...I kept them small to (even though they are quite large alreay)keep some velocity...6.1 heads would have made more avg. power on this cid using race gas I believe.

I didn't even match the 2" adapter to the intake or the carb...it's untouched!
I love how quiet the engine is and simple it was to get good power. I'll let you guys know how it runs at the track...it's going in a tube chassis RX7 car that will weigh 2300lbs. with driver!
Brian

Brian, glad to hear you finally got it running. Nice power!

Brian, glad to hear you finally got it running. Nice power!

Thank you Greg!

Man, those are some fantastic numbers! Been along time since ive done anything with cars....these Gen III Hemis seem to be the next big thing. Fantastic job Brian!

Thank you Brian/Doug! Not sure which one...LOL!!

Did you say RX 7 as in Mazda? Oh my, that should be interesting...

Wondering how much it is to duplicate that power plant?

Give me a call anytime...

KOOL....!!!

Finally an update! The car is ready for testing! Going to try and upload some pictures.

this work?

another

nice !

That should do it!

Looks good Bob!

Is that an RX7?

yep ... 1986 variety. Well, the outer shell is RX7, it's on a 25.4 chrome moly tube chassis.

When will you get a chance to run it?

hopefully very soon! In AZ our racing season is just starting, it's too hot to race safely in the summertime, but we can race all "winter".

Very interested in a build like this...how much cam, hydraulic or mech? And was the 1050 on E85?

what is the crankshaft stroke and cyl bore?
is it the conventional 392" specs.?
will a stock 392 bottom end do the job or do you have to upgrade.
i assume pistons and rings are something special at least?

is this a non mds cam or did you modify it for your cam?
i have a 2012 5.7 from a 2500 truck with 80k miles. i understand its not an mds cam. do you know if this block is different for the non MDS cam?
i grabbed it because its not mds. do you have an opinion?

sorry ive did not see the build specs or build post on this motor.
but it looks simple and reliable..and for that kind of power.. its got me motivated .. thats plenty for my needs.
jim

the build specs are near the beginning of this thread.you'll have to search back about 1 year.

Your block is the same as all the other 2009 to 2017 5.7 blocks no matter or not they have MDS. It is a VVT engine, all the 09+ have VVT. You have nearly the best heads. I have torn apart quite a few with 300,000 miles and they show almost no bore wear and the bearings look even better.

Nice work Guys...

Started making some shake down runs last weekend. Leaving off idle, short shifting, resulted in a 1.41 60ft and a 6.29 @ 110 to half track. On the scales at Wildhorse Pass it weighed 2220 lbs. I'm happy ...seems like a good place to start.

Was this with true E85 or the other stuff?

This stuff tested to be E51

I never set the world on fire my first time out but if you get that to run about the same as mine, you should probably be mid 5s at that weight