Installed RMM/Blitz SUS intake, surprising results
Pit Crew
Joined: Jun 2003
Posts: 187
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From: Michigan
http://www.apexi-usa.com/electronics_safc.asp
thats the most common one. i'm sure there are other companies.
thats the most common one. i'm sure there are other companies.
Hold off buying one and paying $350+. I got one a few months ago (not installed yet) I found a few places for $315-$ 330. I'll look for my reciept & note pad. I believe I got it for $299 shipped. Apexi SAFC-II
Last edited by GILLEXUS; Apr 25, 2004 at 03:09 AM.
Thread Starter
Lead Lap
Joined: Jul 2002
Posts: 524
Likes: 0
From: Novi, MI
Yes you can get a decent deal if you hunt around. We sell them for $300 I think. or $310. It's the tuning and install that is important. Make SURE to solder the wiring and wrap them well and getting through that firewall isn't fun. Uggg. My hands hurt remembering that one. Make sure the dyno operator has tuned Lexus cars before. Their ECU's are a bit different than other cars.
Lexus Test Driver
Joined: Aug 2003
Posts: 1,469
Likes: 0
From: Minnesota
Originally posted by GILLEXUS
Hold off buying one and paying $350+. I got one a few months ago (not installed yet) I found a few places for $315-$ 330. I'll look for my reciept & note pad. I believe I got it for $299 shipped. Apexi SAFC-II
Hold off buying one and paying $350+. I got one a few months ago (not installed yet) I found a few places for $315-$ 330. I'll look for my reciept & note pad. I believe I got it for $299 shipped. Apexi SAFC-II
When i got mine I could find lots of deals on the early version (S-AFC1)
I got my S-AFC II from www.edoperformance.com ph:512-462-0125
$292.00 shipped.
I got my S-AFC II from www.edoperformance.com ph:512-462-0125
$292.00 shipped.
Last edited by GILLEXUS; May 3, 2004 at 03:47 AM.
Lexus Test Driver
Joined: Aug 2003
Posts: 1,469
Likes: 0
From: Minnesota
Re: Installed RMM/Blitz SUS intake, surprising results
Originally posted by Guru
Installed my RMM intake which has been sitting around since last summer. SInce the filter was shot and I never do get very good results from K&N filters I replaced the K&N with a nice stainless steel Blitz filter. Bolted it on and put it on the dyno with my diagnostic equipment. TO my shock I had to add 25% fuel to the part throttle map and 17% at idle to get fuel correction factors back to stock. I suspect the inner diameter of the RMM intake is bigger than stock which is skewing the MAF calibration and fuel map. I then proceeded to do full throtle runs on the dyno and my Motec wideband showed super lean conditions. The stock GS400 runs very rich at 12:1 at WOT. I recorded 13.8-13.3 at WOT. WAY too lean and the ECU was pulling timing and I got knocking constantly. I added tons of fuel and got the AF ratios back to 12:1. Since my old dyno results were done in 2nd gear as opposed to 4th (don't ask I was experimenting) I can not compare results. Everything is now working well and WOT is clean and detonation free. Just one more reason to PLEASE dyno tune your intakes with an S-AFC people or you're asking for trouble. I will check the inner diameters of the intakes tomorrow with a set of digital calipers to see if that was the reason or the stock box was just super restrictive. I've never seen an intake cause that drastic of a change in AF mixture though unless the MAF housing was a different diameter.
Installed my RMM intake which has been sitting around since last summer. SInce the filter was shot and I never do get very good results from K&N filters I replaced the K&N with a nice stainless steel Blitz filter. Bolted it on and put it on the dyno with my diagnostic equipment. TO my shock I had to add 25% fuel to the part throttle map and 17% at idle to get fuel correction factors back to stock. I suspect the inner diameter of the RMM intake is bigger than stock which is skewing the MAF calibration and fuel map. I then proceeded to do full throtle runs on the dyno and my Motec wideband showed super lean conditions. The stock GS400 runs very rich at 12:1 at WOT. I recorded 13.8-13.3 at WOT. WAY too lean and the ECU was pulling timing and I got knocking constantly. I added tons of fuel and got the AF ratios back to 12:1. Since my old dyno results were done in 2nd gear as opposed to 4th (don't ask I was experimenting) I can not compare results. Everything is now working well and WOT is clean and detonation free. Just one more reason to PLEASE dyno tune your intakes with an S-AFC people or you're asking for trouble. I will check the inner diameters of the intakes tomorrow with a set of digital calipers to see if that was the reason or the stock box was just super restrictive. I've never seen an intake cause that drastic of a change in AF mixture though unless the MAF housing was a different diameter.
Thread Starter
Lead Lap
Joined: Jul 2002
Posts: 524
Likes: 0
From: Novi, MI
Yep that's the one. I was going to make a new inlet pipe but looks like I'll have to remake the whole thing. I'm going to change the MAF housing size back to stock or at least close to it. When I remapped the SAFC to compensate for the fuel, the ECU pulled timing so I'm only seeing 22 degrees at redline since I had to add so much voltage to the signal.
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