24valver

Im stuck. My truck feels slow now and im ready to get serious. I here good things about twins and i here good things about a big single. Im just curious what everybody has to say about the ups and downs. TWINS or SINGLE???

blackdiesel

twins are the best (if their in you budget) big single $1300 to $2000 twins $3500 to $5000. to use all the boost and get the good out of the twins you need to stud the head, and with it off rebuild it, that's another 2k.

cumminsdriver635

Twins IMO are the best for spoolup and EGT control. A big single will do it, but they get to be really laggy when you start getting that big.

Eric

24valver

what boost and power would you see from a hx 40/s400 twinn setup.

Dshiftff

If its in the budget, TWINS!

signature600

I saw a peak of 73psi with my 40/B2 combo...but EGT's were still through the roof on my old 95...timing was at stock, and no studs, headwork, or anything else was done! Not a very good setup for making power!

Now, a proper setup with a 40/B2 made 648.8hp on a 99 24v that member Joefarmer used to have. Cam, ported head, and big sticks...no smoke after the chargers lit, and peaked @ about 76psi IIRC!!

That setup is hard to beat IMHO...but even in the twinset, the HX40 can be a timebomb. Mine was fine, but I have heard of others grenading them as top chargers!

Chris

Marine

I was in that dilemma as well. I decided to get a HTB2 62/12, then if I don't like it as much as I think I will, I can use it in a twin setup a couple years down the road.

JKM

I am going to try and do over 500 HP on a single , but keep the good spool up , no drugs.

I am going to do ALOT of head work, valves , springs , stage 3 port/polish , o ring, and i have a hankering for a DonM Helix cam , and i will top that off with an S300 of some sort, likely a 62/14 or a 64/14. That will be supplying Air to a set of edms of some sort (likely 435's to start off),and a slightly massaged pump and backed by a goerend tranny.

24valver

does anyone run a hoset pro 52

Mike Holmen

In a twins app, A HX-40 is pretty good choice. Limit your boost to around the mid 20's, any more than that your driving up your drive pressure. There is better choices that cost more $$$ but a good bucks down combo is the 40/3B combo. If you put the right pieces together you get a good combo. Thats the trick as there millions of 3b and 40 combos. Nothing to complicated for us diesel heads.

Marine

Mike, what turbo would you recommend with the HTB2 62/12 for a towing twin set up?
Thanks.

signature600

Go with a smalller charger...that 62/12 will spool OK, but it won't be what I would call Towing twins, unless you have 4.10's and don't mind a little lag.

I would say a 62/12 and B2 combo would light around 1800 (which isn't bad, and I have towed 30K with my 40/B2, but I have a stick)

If you're really looking for a towing setup...go with a HTBG, Super B, or something that size, and put a B2 under it if you don't tow too often or heavy. If you want super fast spool, go with a GT4294 (71mm wheel) or a K31! The GT42 has a few different housing options, down to 1.01...wastegating the big charger will be nescessary if you use one of these!

Make sense??
Chris

v8440

What exactly would get done to the head in a $2000 rebuild? I've never heard of this before.

blackdiesel

on a 24v the valve guides wear out very very early. (ive been quoted) 1750 for a new reman head with new guides, all the good stuff with o rings.

I dunno if this is as necessary on a 12v, but i know its sure a heckava lot cheaper for the 12v's than the 24v's.

signature600

Not "as" necessary on a 12v...but if you were really worried about it, I would rebuild it! Remember, it won't cost as much on a 12v, either

My extra head is being ported, oringed, and rebuilt as we speak...ready to go on my spare block since I got this lovely 53 in the 98

Chris