I'd try some different settings just to see how yours responds if you've got the time.

 

I think I will only have 2 back to back pulls at the event.

 

Well, I'll be interested in hearing your #'s with the Smarty doing your timing. Keep us posted.

 

my uncle has a twin turbo race truck and he runs a moded htt71/16 ontop and i believe a custom big brother with a titanium wheel with the trim changed and its a bit larger and he is up in the 900+ range. he said a k31 with a 80mm inducer and some exhaust side wheel mods could turn out 700.but im not to sure.I dynoed 692, and that was with my ddp injectors and the smarty on 7 and the tst comp on 8 i believe.

 

what about upgrading my S300 to a 64/14? how much would that help? can you put a bigger compressor wheel on an S400?

 

Idaho just curious why would a wastegate be needed? Without one youd be able to push more air?? Im confused

 

I'd call HTT and talk to Paul and see what he thinks he can do for you. Tell him your goals and I think he can map out a plan for you.

 

You can put a bigger compressor wheel on a S400, talk to Rip about that. I have a 62/14 on top of the 75mm S400, and made 634hp. Air is not what is limiting my hp, fuel is. 700hp, with enough fuel, and this turbo setup does not seem unreasonable. The next step for me would be to go to a 64/14 on top, and a 80mm S400 on the bottom. After that a 66mm on top of a big brother.

What fueling are you going to use to get to 800-900hp, on a VP truck?

Paul

 

thanks Paul. thinking way down the line for what I want to do with the truck. either there is that new HOTVP or I will P-pump it and it will be a sled pulling only truck at some point.

 

If you go P-pump, go one size bigger for chargers than what you would with a VP...at least I would! The p-pump's static timing, and massive fueling will need a bit more air, even with a 24v head!

IMHO,
Chris

 

what size inducer do most S400 have? a 74mm??

 

Most are...they make them anywhere from 64 on up over 74/75mm, maybe up over 80!

Chris

 

80 are pretty rare i had to have one made for me that was that big. its alot slower spooling but it does noticabley move more air that a 75. my k31 is going to be converted to a 80 mm titanium wheel, so i can keep the small side the same quick spool the exhaust side is being converted to a boreless one piece exhaust turbine. its suposed to allow me to spin faster turbo speeds and more boost.

 

Do you know what kind of air it will flow?

 

no i dont know but they said alot more proably a couple hundred more cfms im really not to sure.