pajamasam

iTrader: (6)

I want to build a nitrous short block. I have a 6.0 block get preped at the machine shop for a 408 stroker kit. I want it to handle a bunch of nitrous. But here is the THING i want to run on 93 octane pumpgas. I can run a standalone for the nitrous kit with what ever gas.

What is the most compression i can get on this 408 stroker? i was thinking around 12-12.5:1?

I will be running a ls7 type head, maybe that brodix br7?

Let me know what other info i should know for coming up with answers.

pajamasam

iTrader: (6)

Any ideas?

ViaBellator

iTrader: (2)

12:1 should be OK provided other factors are correct. Your cam choice will have a lot to do with what fuel you can safely run. Mine is at 11:7:1 SCR and 8.5:1 DCR give or take.

Sales4@Texas-Speed

iTrader: (4)

To be safe we usually cut the line at 11.5:1 for compression. I know some people have gone higher in the right situation but we prefer to be cautious about it. At this time I am not aware of any LS7 heads that will fit on a 4.030" bore, so you might look into some LS3 style heads if you are wanting to go rectangle on the motor.

http://www.texas-speed.com/p-1016-ts...-assembly.aspx

That rotating assembly in the link would be conservatively rated to 900hp as long as you put an ARP main stud kit in the bottom end with it. I think it would be able to handle a pretty hefty shot.

pajamasam

iTrader: (6)

That kit seems very nice and very nicely priced!

These heads wont work? http://www.brodix.com/heads/br.php

EDIT: Just saw the minimum bore of 4.125 so that answers my question.

RezinTexas

FWIW my engine builder (hke) recommended to keep the CR at 11.25 max.