Airflow Logistics AFC dyno results

[kicker22705]

last i heard, they just started working on them. no one will get one prolly for another 3 weeks.

 

[Spooled]

I say timing is must for MSP's that want to turn the boost up. 10+ psi at the flashed timing settings will knock in the higher RPM's for many people unless you keep the AFR's really low (as in 11:1). Personally, I would like to retard timing a little and keep the AFR's closer to 12.

Edit: Don't get me wrong. I'm still really interested in this!

 

[Tommy1005]

well, when we get them in the next 2 or 3 weeks, I will let you know. I plan on setting my boost at 10psi and using the 10psi map. DSM or EvilMSP would be able to better answer that question since he was there when they tuned the 10psi map

 

[EvilMSP]

I say timing is must for MSP's that want to turn the boost up. 10+ psi at the flashed timing settings will knock in the higher RPM's for many people unless you keep the AFR's really low (as in 11:1). Personally, I would like to retard timing a little and keep the AFR's closer to 12.

Edit: Don't get me wrong. I'm still really interested in this!

Well from the dyno chart you can see that the maps vary from 11:1 to 12:1, it's not a flat-line.

 

[EvilMSP]

well, when we get them in the next 2 or 3 weeks, I will let you know. I plan on setting my boost at 10psi and using the 10psi map. DSM or EvilMSP would be able to better answer that question since he was there when they tuned the 10psi map

I'd like to answer but I can't seem to find the question you are talking about lol.

 

[Tommy1005]

spooled said something about knocking at 10psi and above with the flashed timing settings in post #162 I don't think it was a question as much as a statement. I would be curious to know if you experienced knocking before the map was fine tuned

 

[low_psi]

yea, at over 10psi you really need to start pulling timing to avoid detonation.

 

[jeffmsp]

not necessarily, but if you are just using the tuner(and i hope at least a dp) i would think so.

 

[EvilMSP]

I will let DSM answer these technical ones cause he is the tuner, I am just the guinnea pig . But I haven't noticed anything like detonation yet, but I've never even had that problem before so...yeah. Let DSM talk about this. I'm sure he'll support the product as is cause he REALLY plans things out well.

 

[azian6er]

i am running the thumper kit with flashed pcm and not knocking. 12 psi too. All i have done is a high flow denso (flows more than walbro 255) fuel pump. I ran good afrs with the gt28rs at 10 psi (11.3-11.5 at wot) and that turbo had a .54a/r . my new turbo has a .63 a/r so maybe it isnt pushing as much air as the gt28 was at 10 psi because the wheel really hasnt start to spin yet.

I say for those of you who want a turbo upgrade, an easy way would be gt28rs, wideband, and a fuel pump. That should put you right at about 11.5 afrs at 10-11 psi. Then again this was on 93 octane.

-bryan

 

[Spooled]

Yeah, different setups will give different results. I was just talking about in the higher RPM's. Actually, the test was with the iON t-back exhaust and FMIC (on 91 octane I believe). Of course, that may be because of stock plugs (less time to cool between strokes in the higher RPM's can cause pre-ignition). I'm on 93 octane and I'm running cooler plugs, so I'd like to see what playing with the fuel alone could do for me. I don't plan on running anything over 8psi until I have DP/intercooler/pump/injectors, pretty much for safety.

 

[Spooled]

Oh, and Bryan, this is sort of off topic, but how was the boost build-up on the GT28RS? I'd actually like a smoother transition into full boost. I think I'm one of the only people who like a little bit of turbo lag. I'm looking for a smoother powerband instead of the burst at 3k. I drove an MSM a while back and it felt like it was NA.

 

[azian6er]

get the gt28rs and a fuel pump

-Bryan

 

[DSMConvert]

That was actually something we paid very close attention to in our 10psi tuning and we never had the slightest bit of detonation, though this was with 1 stage colder plugs...My personal opinion based on our tuning and testing is that the MSP can run up to 10psi reliably, anything over that is taking a chance...i've seen several people locally run 12psi daily and their engines still hold together, but based on our testing and tuning I only feel comfortable recommending up to 10psi with stock internals...with timing control I'd wager to say its possible to safely run around 13psi....we're currently working on that now, but prob wont have any definitive results till around March...

 

[EvilMSP]

That was actually something we paid very close attention to in our 10psi tuning and we never had the slightest bit of detonation, though this was with 1 stage colder plugs...

Pssst It was on stock plugs. The ones in my sig were damaged in shipping and never got installed, has been removed from sig now though.

 

[DSMConvert]

hahaha oh wow, then i stand corrected we tuned on stock plugs...oh and for those of you that are curious, I'm working right now to get another GB price together...but dont expect anything for about 3wks...

 

[Mallard]

DSM, I have a question: Can the AFC control a wideband O2 (i.e. can it take a wideband input and convert it to a narrowband output for the ECU)? I'm wondering if I only have to buy a wideband sensor, or if I have to buy the whole sha-bang with the control box.

 

[atticus1398]

Let us know when to start a new list!!

 

[Rainman]

subscribed and awaiting GB #2

R

 

[rocketspeed]

Waiting on GB #2 as well. DSMConvert, what are your thoughts on reliability running the 8psi map and, of course, 8psi? I wonder if I'd need a FCD to run 8- maybe in cold weather. I don't really want to run a FCD, as fuel cut helps stop the exploding engine phenomenon.