AMS Drag car pics - Page 2

Swifty1638 · 11-19-2008

the competititon judged also on powerband. so that was why martin thoight to do the sequential. but money and time to develop didnt allow that to work. so a single 4202 was used with no backpressure bein the name of the game.

Kevin 1G Drummer · 11-19-2008

Wow, that looks like a crazy setup.

b00stcreep21 · 11-19-2008

^^^ Correcto. I'm curious if the way they had it set up would actually spool the little guy at any decent rate

**Goat Blower** · 11-20-2008

Fatty might be right for once. The large turbo is fed the full exhaust stream and the smaller turbo is being fed from the exhaust after passing through the hotside of the bigger turbo with a gate just after that. So I'm guessing the gate is closed building pressure in the exhaust and spooling the little turbo which creates a ram air effect into the intake side of larger turbo and once the larger turbo starts making a predetermined amount of boost, the exhaust gate is opened which stops the smaller turbo from making boost and becoming a restriction.

FattyBoomBatty · 11-20-2008

Jet, you kindof answered the question yourself. It goes into the intake of the large one, but to be effective it needs the intake gate closed. It does help the large turbo spool somewhat, I'm sure, but I think it's main purpose is just for boost until the large one is spooling up.

**JET** · 11-20-2008

Quote:

Originally Posted by FattyBoomBatty

Jet, you kindof answered the question yourself. It goes into the intake of the large one, but to be effective it needs the intake gate closed. It does help the large turbo spool somewhat, I'm sure, but I think it's main purpose is just for boost until the large one is spooling up.

I didn't have a question. If the only purpose was to provide low end boost, why would they route the output of the little turbo into the big one and not just bypass it all together? It has to be to spool the big one, otherwise it would be easier to run a staged system.

**Goat Blower** · 11-20-2008

But it's not spooling the bigger one, if it was, it would be directed to the turbine wheel, not the compressor wheel. That's simply forcing more air in, but not really helping spool the turbo.

**JET** · 11-21-2008

Are you saying to aim the compressor outlet of the smaller turbo at the turbine inlet of the larger turbo? It could work the way it is if they are using a smaller turbine wheel on the GT28R to spool it quickly, then switch the valves before it chokes. It all depends on the turbine to compressor ratio's of the turbo.