4" IC piping
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4" IC piping
by ford69557ci » Mon Feb 04, 2008 5:38 pm
I have noticed that alot of the big power power stroke guys are runnin 4" ic pipes. I know the cummins is quite a bit smaller but with twins and a massive amount of fuel that alot of poeple want to run wouldnt 4" pipes improve flow? I know it would slow down spool up but I would think there would be an egt reduction alot more flow and with an IC with 4" in/out and that large of a core there would have to be a benifit. I run 4" on my s 10 and so do most other 10.5 tire or faster turbo and procharged cars. Any ideas???
92 w250, NV4500, D80, maxed pump, AFC gone, extended fuel screw, more to come.
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ford69557ci - 14mm rotor
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- Joined: Mon Jun 18, 2007 4:36 pm
by seeker1056 » Mon Feb 04, 2008 8:00 pm
air is a fluid
fluid is easier to push through bigger pipe at less pressure loss
I did a thread a while back on what psi it takes to push the minimum cfm required ( just shy of 1350 cfm) to make 700 hp through a 3" pipe and how much less it would take in psi though a larger pipe.
If memory serves it takes about 70-80 psi to make enough airflow to support 700 hp through our current 3" piping which in many cases is actually 2 3/4" leavin the turo, and enterin the stock gen1 intercooler.
Did you know even the 2007 has one intercooler outlet necked down to 2 3/4, even though all other boots and elbows are 3", to cut boost and pressure?
Dont confuse compression between the turbos and gettin air into the system with pushin the air once it leaves the turbos.
However I am not so sure that 3" between the turbos is good either but dont have the resources to test it.
The ideal setup may be three inch between the turbos, with a venturi leavin the last turbo into the 4" intercooler pipe to speed up the airflow and cool it at the same time via the pressure'flow changes and another venturi goin into the manifold for the same reasons.
It works on the same principal as air conditoning does to get pressure and cooling.
we will see wha t happens in the spring once i get my turbos sorted out and get a chance to play with piping and stuuff i have in mind
fluid is easier to push through bigger pipe at less pressure loss
I did a thread a while back on what psi it takes to push the minimum cfm required ( just shy of 1350 cfm) to make 700 hp through a 3" pipe and how much less it would take in psi though a larger pipe.
If memory serves it takes about 70-80 psi to make enough airflow to support 700 hp through our current 3" piping which in many cases is actually 2 3/4" leavin the turo, and enterin the stock gen1 intercooler.
Did you know even the 2007 has one intercooler outlet necked down to 2 3/4, even though all other boots and elbows are 3", to cut boost and pressure?
Dont confuse compression between the turbos and gettin air into the system with pushin the air once it leaves the turbos.
However I am not so sure that 3" between the turbos is good either but dont have the resources to test it.
The ideal setup may be three inch between the turbos, with a venturi leavin the last turbo into the 4" intercooler pipe to speed up the airflow and cool it at the same time via the pressure'flow changes and another venturi goin into the manifold for the same reasons.
It works on the same principal as air conditoning does to get pressure and cooling.
we will see wha t happens in the spring once i get my turbos sorted out and get a chance to play with piping and stuuff i have in mind
91 F350 5.9 Cummins, Custom built VE 12v
Sponsors of new truck
Performance Diesel Injection
Colt Cams
H&H Offroad
Arties Transmission
Toms Contracting
Sponsors of new truck
Performance Diesel Injection
Colt Cams
H&H Offroad
Arties Transmission
Toms Contracting
- seeker1056
- 14mm rotor
- Posts: 506
- Joined: Tue Mar 06, 2007 7:19 pm
- Location: Lakefield Ontario Canada
