caleb c.

Well I will be upgrading my injectors here pretty quick as soon as I get my air on the truck. Im going with a HX-35/14 and HT3B setup. And I have been very happy with my F1's so I think Im going to stick with them. Im just wondering what size to go with, I was planning on the 4's, but wonder if I could go bigger? Like maybe a 5, but Im thinking a 200 hp stick might be a bit much! I do tow alot so that is a consideration. I am also running a TST Comp and a Smarty. I want to go as big as possible but not be able to see 1600deg! Not that I ever have before

displacedtexan

I can't really offer much input on size, but how much do you tow weight wise? And pretty much always around home? It is pretty flat and low there, that can make a difference...

caleb c.

Im really not sure of the weight of my trailer, its a pretty big 3 horse with full living quarters and it is quite heavy when all loaded up. And I go all around, so I do get into mountains once in a while...

BigBlue

I'd say stick with the 4's. Plenty of power and when you turn the box's down you should have no issues with EGT's with the twins.

HOHN

Ya, the 4s will fit ya perfectly

Jetpilot

You would be able to run 5's no problem if you had a SO truck, but seeing how you have an HO going above a 4 really won't gain you anything.

Tiger Rag

With the HO and twins you'll tow very well with the Mach 4's. I had 155 hp BD injectors and my truck towed great with that set up (36 foot race car hauler with living qtrs @ 15k lbs). I decided to go with Mach 6's and it still tows well and doesn't get too hot. It did control the heat better with the 155hp injectors. If you are considering a HRVP down the road, then an injector bigger than 4's might be for your consideration.

If, you're going to tow in the mountains, 4's may be your best bet. I haven't taken my trailer to the mountains yet, although I plan to. I think I'll be fine with the TST off.

paulb

I would go with the mach 4's. Very clean and smooth running injector.

Paul

getblown5.9

do you have the head o-ringed and studded...or at the very minimum studded with the stock gasket.

i just hate to see people spend money on new sticks and twins and then find out they have some serious repairs to make when the HG goes pop

caleb c.

yes sir I have studs and rings...

getblown5.9

sorry, i looked and didnt see it in your signature so i was just checking.

to test my sanity was it there the whole time or did you recently add it to your signature?

caleb c.

HAHA it's been there a while now! It's cool, I do stuff like that all the time!

Rodram2002

I'd say M4's too. with what I have in my sig, at sealevel I see about 1350egt's with max fuel. I'm sure the 35/3b twins wont be able to cool that much fuel.

natlchamp2k4

Caleb just get the 7's and tow with ALOT of nitrous

Just tryin to help.

Nah, the 4's sound like they'll do.

Jamie

RowJ

Bigger than Mach 4's will only add cost and maybe heat, but no power with your HO.
I think you'll find anything over about 450 hp will be to hot for towing anyway and you'll be turning the TST down.
Even with your twins and the 4's, you could see 1500* egt's at WOTon a hot day.

With summer coming to the 'flatlands' I'd put in a 180* T-stat also.... eliminates your coolant temp as the limiting factor for towing power.
JMO

RJ