signature600

Just so you know...some people say that HTT's HTBG is the same turbo, and I'm sure II has something to fit that spot as well. Just giving you a few more options!

Chris

RowJ

Needed to hear this. I installed F-1 valve springs because I am pretty sure I was getting valve float... never actually heard it though.... just felt more like responsible preventative maintenance!

It IS hard to spend that money for no noticable difference, that I can actually feel .... not to mention almost 5 hrs install time, incl. new valve seals.

What had me confused is the second hand report I got out of Montana! Supposedly, Don M. told an H2 cam buyer (drag racer) that they did not need the springs? Maybe there were other considerations?
I know they were developed primarily for the Helix 3, but still...? I felt pulled both ways, about doing the springs.

RJ

signature600

Technically, with an H2 you don't NEED the springs, but you are operating very close to coil bind with stock springs. I don't know why anyone would spend the money on a cam, and not upgrade the valve springs...they wouldn't do it on a gas, but it's OK on a diesel??? Especially with all the valvetrain troubles the 24v engines seem to be experiencing lately!

IMHO,
Chris

Marine

Looks like I'll be spending some more money...

yarddog

How much will a helix 2 reduce EGT's? I noticed when I installed a 4" exhaust, the EGT's were reduced by about 200 across the board. Can I expect a H2 to drop the EGT's another 200 or?

I have a 200HP comp that when set on kill will peg the pyro in couple seconds. The 4" helped a little so I can stay on it longer. If a cam will let me stay in for say 5 seconds longer that's worth it to me. Plus the mechanical lift pump is a really nice added bonus.

PourinDiesel

I suggest getting the cam and adding a banks 14cm wastegated turbine housing.....if you are wanting to keep the stock turbo on your rig.

Ph4tty

How about for the guys who use their trucks as towing rigs and aren't going to be pushing boost through the higher rpms?? The spings cost almost what the cam does.

PourinDiesel

I would especially recommend the springs for people towing under constant boost pressure.

Quit being a cheap skate!!

Marine

If you look at the F1 site for the springs, it shows that the stock springs bind at a certain duration. What the stock duration is, I do not know.

Ph4tty

My next planned bombs are springs and studs then a cam down the road. I'm thinking of guys like marine and bartman.

Marine

Ph4tty,

Do you tow alot with your rig? What Mach's do you have?

Ph4tty

Mach 4's and all I haul is butt

Ph4tty

Don's said that running boost over 3k can cause valve float. I do this accidentally from time to time so I think I need springs.

PourinDiesel

YES YES YES.....

Trust me you'll feel good about getting the springs!

Marine

So if I do the Cam and Springs, what else should I do (besides studs) to the engine while everything is torn apart?