Thoughts on Triples.....

[DodgeFreak]

I was reading on CF and CompD awhile back and came across a triples thread's. What are your thoughts on it, I'm thinking about going that route as I have 3 hx's. I'm actually thinking about using 2 hx 35s as primary's and the he351cw for the secondary. yay or nay.....

[ellis93]

If I remember right Jon (oldestof11) was pondering the idea at one time. If I knew something about it I'd form an opinion

[Tacoclaw]

I think they're cool. I also think that I'd rather fab 50 sets of twins than have to do a set of triples. I also find it funny how horrible the flow looks on a lot of them but how little it seems to matter. Kinda makes me suspicious if a lot of the stuff we try to make smooth in the exhaust even matters.

[Deathrod]

I think if done right they would look cool, but compounds are a lot easier to build, so what would be the point of triples? Since u have 3, I'd sell 2 and buy an atmospheric. 3 oil lines, 3 oil drains, all the exhaust connections, more likely to have problems/ leaks.

[Remps]

Well I think I've read every thread on the internet about triples, which makes me a certified keyboard racer. I think the two 35's would be JUST big enough to feed the 351. Doing a 60 mm upgrade would increase the potential of the 35's. Mind you, its only a 12mm ve, right? The 351 has a better wastegate, but I think a hogged out wastegate on a hx35 secondary would work fine on a -450 hp ve. A 351 with a modded wastegate with two 60mm hx35's with modded gates would give you more air flow than your average ve would ever need. Two 60 mm hx35's would flow what...120-130 lbs per min? Similar to an S480?

[RCCUMMINS89]

If you have the patients and know how............go for it. Properly set up, you'll be really happy with it.

[Kasper Cummins]

3 hx35s should be similar to an hx35 ht3b combo. Some playing with the wastegates should make for a fast spooling setup. Plus it could be upgraded to 60 or 62mm wheels later on.

[RCCUMMINS89]

I think if done right they would look cool, but compounds are a lot easier to build, so what would be the point of triples? Since u have 3, I'd sell 2 and buy an atmospheric. 3 oil lines, 3 oil drains, all the exhaust connections, more likely to have problems/ leaks.

It's more "problematic", sure. But the idea behind triples is, that they spool faster than compounds. And properly set up, they do.

And of course, then there is the really cool factory.

[oldestof11]

Your secondary/high pressure turbo should flow 1/2 as much as your primaries. So going slightly bigger with the he is just right. To see how well it compares to a certain compound arrangement you take the total primaries flow in CFM and compare to a traditional S400 variant. So 2 hx flow around the same as an S471. This would be about perfect for a 1st Gen.

[RCCUMMINS89]

Yep..........he351cw over an s471/472 is about as perfect as it gets. Well......perfect enough anyways.

[DodgeFreak]

good, now I just need to get my HE built. I've never built twins or anything for that matter so why not jump head first and build a set of triples... which will be awhile out yet because I've got another project ahead of this one.

[Sutter1stgen]

Only advice I can give is to run a flex ball hone or a wire wheel on a flexible extention through all of your piping before startup. I have personally screwed myself over by not doing so, and I know of a person that was super slow learner, and did it twice.
Small slag is hell on wheels.

As for the triples, I did a bunch of research on them myself this last week. As I have a few extra chargers I know of I could trade for. Saving for my next twin build didn't seem as cheap as a H1C/HX35 triples build. I know I could build a set of triples cheaper than a s472 primary. The only problem is, I want to know for sure that a H1C/HX35 triples setup is going to work on a firstgen. I don't think anyone has done it except Harvey Grant with his rat rod. He used small H1Cs as his primary. I would be all for it, I would just like cold hard proof that it will work for a ve. Then I would feel better about the build.

[DodgeFreak]

Another question, I've seen\read where a person machines the exhaust housing to fit an hx turbine wheel besides flow what are the advantages? Because I'm sometime in the near future I'm sending mine out to Taco and he's going to try and machine it for me.

[Tacoclaw]

Don't make me sound too good, I'm going to take my HX/H1c wheel and see if it's even within my capabilities. If its a simple hogging job of one of the ODs of the housing I don't foresee it being a problem.

[oldestof11]

Sutter, take into account that the rat is about 1/2 the weight of our trucks. Less energy is need to get it moving which means less fuel to spool them.

The 18cms make me a little nervous on spooling. I would see if I can get either 14's or 12's. If I was to do it, I would get ungated 12's and put a gate in the hot pipe to the 2 atmospheres.