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Power FC PFC advice

Old 09-21-17, 10:39 PM
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PFC advice

Hi everyone,

So I took the opportunity over the summer to take the engine out to replace the original 100k miles twin turbochargers with another set of twin turbos (used), new heat shields, ACV and air pump removal, etc. I also picked up a PFC and DataLogit, wideband, water injection, 1300cc Secondaries, and fuel pressure sensor....however the summer got away with me with the family trips and activites - and I have a track event in a few weeks. It's now crunch time for me so I'm considering just installing the engine with the 1300cc, PFC, and maybe the Datalogit. My question is how difficult would it be for me to tune the car with just this setup? Is it just adjusting the map to take account the 1300 secondaries? Or would I need to have the wideband and fuel pressure sensor to take full advantage of PFC? I have access to a Dynapak if that is a variable in helping with your advice.

Other mods are HKS open intake, exhaust, downpipe and a high flow cat (probably toast).

I have to complete the next two events and can easily pull the engine again over the winter. Or do I just go with my stock 850's and stock ECU?





Thanks in advance.
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Old 09-21-17, 11:30 PM
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Don't do the track day until you can get it professionally tuned on a dyno and have upgraded your cooling systems (water, air, and oil)

But then again at 100k, it may be due for a rebuild anyway
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Old 09-22-17, 08:49 AM
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Originally Posted by TomU View Post
Don't do the track day until you can get it professionally tuned on a dyno and have upgraded your cooling systems (water, air, and oil)

But then again at 100k, it may be due for a rebuild anyway
Engine is a reman with about 30k miles on it. I have all the track day upgrades (extra large radiator, AC delete, R1 dual oil coolers). Car has treated me well for the most part and has been reliable.

I'm leaning toward putting the stock 850's and ECU in just to ensure the used turbos and the sequential system is functioning (and that I put everything back together correctly).

Also will give me more time to read up.

Thanks.
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Old 09-24-17, 10:23 AM
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Originally Posted by Svelte_7 View Post
I'm leaning toward putting the stock 850's and ECU in just to ensure the used turbos and the sequential system is functioning (and that I put everything back together correctly).
Wise decision
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Old 09-25-17, 11:24 AM
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Originally Posted by TomU View Post
Wise decision
I already pulled the pins in the harness and have a 1/4 turn on the idle adjust when I tested the used PFC before taking the engine out - what are your thoughts on using the PFC and bas emap with the stock injectors (550/850), and my current setup of intake, exhaust, high flow cat (still have stock intercooler)?
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Old 09-25-17, 12:28 PM
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Originally Posted by Svelte_7 View Post
I already pulled the pins in the harness and have a 1/4 turn on the idle adjust when I tested the used PFC before taking the engine out
Well, that could be a problem. Not sure if disconnecting those to the stock ECU will throw it limp mode. If it doesn't, i'd leave them disconnected (may throw a CEL tho)

Originally Posted by Svelte_7 View Post
what are your thoughts on using the PFC and bas emap with the stock injectors (550/850), and my current setup of intake, exhaust, high flow cat (still have stock intercooler)?
I am by no means a PFC expert, but i do know i wouldn't want to run a rotary on a track at WOT w/o tuning for that use. You may be fine puttering around town on a base map, but not at WOT.

and FWIW, i have a PFC with stock twins, emissions (at least what's left), and a large street port and it ran like **** on a base map. I assume it was the porting, but i still wouldn't trust a base map on a track

Also, you may want to look into upgrading your SMIC before you get your car tuned. The stock IC is inadequate. Or, at least look into AI
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Old 09-27-17, 06:01 PM
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Should contact banzai racing for their base map. Much more refined than the original base map on Pfc. there was a write up on modifying the original map somewhere here on the forums I believe. Read all 30 pages of it.
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Old 09-29-17, 02:25 PM
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Originally Posted by DR_Knight View Post
Should contact banzai racing for their base map. Much more refined than the original base map on Pfc. there was a write up on modifying the original map somewhere here on the forums I believe. Read all 30 pages of it.
Will do - thanks.
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