did you have the 243s prior to getting the 427 or did you order them with it? who did the CNC'ing?

 

Livernois did them for me before i ordered the 427

I made 461 H/C with my ls1

 

UPDATE

Well the motor will be here tomorrow I cant WAIT!!!!

And I go off the phone with EPS earlyer and he gave me the new specs on the custom cam. Should be insane.

Now thinking of a clutch. Any Ideas? Im thinking Monster stage 5.

 

Ok motor is in now and running great I did do some changes tho

Now it on E85 and bumped the CR to 13:1.

It was crazy when i measured the pushrods because it now needed two different sizes.

 

What are the cam spec's? Enjoy the new found power.

 

Cam Specs are

247/258
647/647

 

Congrats with your new engine man!

 

I think 550 rwhp na is optimistic based on the heads and intake selected, they may not flow well enough. Let us know how you make out.

 

Agreed - but hopefully, we'll find out soon.

 

Agree...
I have only 13 more cubes and a some other stuff and i'll be more than happy with 620rwhp NA. Someone on here said 570+rwhp for the OP... I do not know about that one, being very optimistic.

 

Even with the best 243's, with a FAST 92 combo, my guess is 515/510, which is definitely going to be fun on the street.

I want to do a bigger cube motor possibly this year, and re-use my PI heads and get a solid 500 rwtq and whatever horsepower as I just want a really fun street car.

 

guys i seriously think it going to be right around 550 i will be putting it on the dyno after the break in I have 150 miles on it now

 

Don't be surprised if you do not crack 515 RWHP....those heads are terrible for any engine over 400ci, especially one with 13:1 cr. You need 400cfm heads for that thing, then you'll close in on 600 RWHP. But sometimes cash doesn't allow the best stuff.........it'll be fun with the 150 shot for sure. I got tired of my ~500 RWHP fast.....like in a couple weeks.

.

 

Well everyone said i wont make but around 515hp but i proved you wrong.

550.35 horsepower
537.14 torque

 

Wow, nice numbers.

 

Well, I was wrong, and I'm happy for your that I was. Congrats on the setup.

 

yeah congrats man, did i read that right or did you say you have rebuilt the 10 bolt twice already?

 

How is the motor holding up?

 

subscribing! nice setup!!!

550rw is awesome man!!!

 

The motor is running great am very happy with schwanke.

Also yes the rear end has been built 4 times and im in the process of saving for a 12 bolt.