[Mrs.Studmuffin]

Welcome to our Hemi Family!!

 

[Mrs.Studmuffin]

Holley single plan Intake, for the 03-08 heads, you have two options,
1) weld up the ports and reshape them to match the older heads, Con= you lose about 30Ft lbs of Tq under 3200rpms, need an elbow or need to have a 4BBl to Mopar TB adaptor plate made, I think OCPerformance is still making them.
PRO...not much, it'll pull like a freight train all they up to 7k and with the right tune , it'll still make useable power all the way up to the oil pump cavitates.
2) buy the Holley adaptors to go from Eagle/6.1/6.4 port to 03-08...Con: price , still have the lack of Tq under 3k problem, not as bad, the Adaptors add 3/4 inch to the runner length, which gets you close the the runner length in the stock truck intake, the big issue with the Holley single plan intake is the approach to the port opening in the 1st place...Air is HEAVY and AIR does not like to change Directions.

545 trans................Junk 450-500hp is where they start to say ......Screw you I'm out of here, the later PCMs are easier to program , and you can use some tricks to help, 08, 10-14 we can just about tune out the Prime gear to keep it from hitting to hard, but it's not a cure, you can get it the RFE65 in the 13's and 14s to get close to 550-600 but it's still a time bomb waiting to leave you stranded....... the 545/65 trans is crap.....Nag,HP80 46RH , T-56( my favorite) are your best options, Cheapest would be a 46RH(A518) bolt in, uses stock drive shaft(4x4..Not so much) For the All out take no prisoners the Old school 727 is hard to beat...but you give up OD .

Darton Sleaves , Take a F'ton of machining to make work in the open deck 5.7s,(been there done that, nothing like 458Ci and 5.7 still casted to the side of the block....4.165boreX4.20stroke), LS sleeves can be mad to work....4.22bore max.
The limitation of only 8 functioning head bolts , you always have sealing issues especially with any boost level over 14lbs, Copper gaskets can help but, its only a band aid(Clark Copper Head gaskets....ONLY!!!!!!!!!!!!!!!!!!! No others will work PERIOD .)

The 5.7 Cast crank will take up to 1000hp as long as the tuner is good, my uncle as a customer who has been running a 347Ci 5.7 with the oem crank up in to the low 800s for 6 years and 90K miles ....There's a guy who runs a Wagoner with a 5.7 eagle compound turbo set up who has been in the low 900Hp on the stock 5.7 crank....BUT best option is the Hellcat crank, you will need to trim the nose of the crank, but there are stock Hell kitty cranks hitting 1200hp, again if the tune is correct.

Dump Diablo , Go HPtuners

03-08 5.7 blocks can and have been bored out to 4.00 and 4.03 since 2008 , Nutter racing in Washington state were doing it 08, taking 6.1 pistons and boring the 03-08 blocks out to 4.055, I think that's too much self, My uncle has a 444 CI 5.7(4.08X4.25) that he built in 2017 , it had about 35k miles on it before it was pulled out for a Hellcat crate engine swap....Bores on the trip4 look good yet, only .005 runout , which for a stocker is high but for stroker like that , it's good.

Welcome to our Hemi Family!!