Soul coughing - I am a bit of a turbo noob. I was under the impression that the amoun of air flowing through the engne = air mass moved through a given volume (the engine displacement). Air mass is a function of pressure (higher pressure = more dense charge. Charge volume is the same (same IC pipe volume), so only pressure can change).

I assumed the loss in power associated with log manifolds was heat related (caused by larger amounts of back pressure). Back pressure = more heat.

I know the turbine will not flow as much as a larger turbine at the higher RPM's (turbine RPM, not car).

John

 

yeah i know,

you had problems but tons of ppl are running 7173's with FI and having no issues.

I am having no issues as well.

 

My carf ran like complete dog poop with these plugs, stalled in traffic backfired/misfired at WOT.............I put my Greddy ones back in

 

Meth is a substitute for fuel. When running meth/alchy you can scale back your injectors as you are injecting a fuel substiture into the motor. When I had alchy injection in my sti I was able to scale back my injectors 20% on my alchy map. If I wasn't flooring it all the time I probably would have gotten great miliage.

 

well if i start having problems i'll start with the plugs, but i've been ok so far.

Mine are gapped at .030

 

I am looking forward to the install. So is it safe to say I can safely run it temporarily until I can get a chance to get it tuned? How rich will I be running? I wont bring it past 5kRPMS.............. I am also going with a Berk HFC so that may lean it out a bit

 

What your saying makes sense, but you need to look at the whole system. Not just the compressor, its tubing, the intercooler, TB and the motor. You need to think about the exhaust system as well, which includes the manifold, the exhaust side of the turbo, the downpipe and the catback. The difference between your manifold and a greddy is the exhaust, basically everything past the exhaust valves. It is alot harder for the motor to push the exhaust through the manifold, then the small turbo housing, and out either the little internal wastegate or 2inch downpipe and finally through the stock cat or stock exhaust etc... The added amount of backpressure shows its head in the form of PSI, hence the difference between you making 335whp at half the boost pressure as a Greddy! This of course doesnt even bring into the picture differenct sizes in tubing, A/R's, pressure drops across intercoolers etc...

 

7173's ftw

 

i agree! i only get 1.5-3k miles out of them, but they are cheap!

 

I personally run the NGK iridium BKR8EIX. They are one step colder, come pre gapped at .030, is a resistor plug and only cost 7-8 dollars each. Plus they last much longer than coppers.