Supercharged GS400 tuning/ performance questions
#77
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do you have the rmm kit? what I'm talking about would go between the two pulleys that you can see in the below pic (pardon the silly engine cover, I haven't taken a new pic). it would require a smaller pulley on the sc 2.6" or whatever and a smaller Idler or whatever the name is of the one directly to the right of the sc pulley. Ideally you would want the new static tensioneer pulley and the one below and in between the two shown to be as close together as possble, this would cause the belt to contact the sc pulley more. As you can see in the pic, a little less than half the pulley is making contact with the belt, adding another tensioner/ idler pulley would give you 70-80% contact, this would eliminate slipping allowing one to have the full potebtial of the supercharger.
Last edited by gs400 civi; 07-17-09 at 01:43 PM.
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hey I was just talking w/ a friend/ coworker about A/F ratios and the SAFC etc. wht I'm wondering is, right now I know I'm running way rich, most likely because of the 550cc injectors whoever put in for whatever reason, and the SAFC doesn't have enough range to lean it out enough. I know I can go full stand alone and control everything including the vvti and timing etc. but is there something in between? something that will at least control the a/f stuff so I can have optimal ratios at WOT? maybe include some other functionality like timing control or even vvti?
#79
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This past month, I've been extremely busy getting the car back together for a show this Sunday plus 2 more events next week. Three shows in 6 days and I'm still finishing up on the mods, plus I'll slip in mods in between the two weekends.
I wanted to chime in to this thread, but it's just too hard right now. After this post, I'm essentially offline until Monday.
Here's the car and "some" of the updates as of today. I'll probably post a separate thread with details after the last show is over next week.
Just a teaser for now.![Stick Out Tongue](https://www.clublexus.com/forums/images/smilies/tongue.gif)
I wanted to chime in to this thread, but it's just too hard right now. After this post, I'm essentially offline until Monday.
Here's the car and "some" of the updates as of today. I'll probably post a separate thread with details after the last show is over next week.
Just a teaser for now.
![Stick Out Tongue](https://www.clublexus.com/forums/images/smilies/tongue.gif)
Last edited by RMMGS4; 07-17-09 at 04:20 PM.
#80
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This past month, I've been extremely busy getting the car back together for a show this Sunday plus 2 more events next week. Three shows in 6 days and I'm still finishing up on the mods, plus I'll slip in mods in between the two weekends.
I wanted to chime in to this thread, but it's just too hard right now. After this post, I'm essentially offline until Monday.
Here's the car and "some" of the updates as of today. I'll probably post a separate thread with details after the last show is over next week.
Just a teaser for now.![Stick Out Tongue](https://www.clublexus.com/forums/images/smilies/tongue.gif)
![](https://www.clublexus.com/gallery/data/500/DSCN5606.JPG)
I wanted to chime in to this thread, but it's just too hard right now. After this post, I'm essentially offline until Monday.
Here's the car and "some" of the updates as of today. I'll probably post a separate thread with details after the last show is over next week.
Just a teaser for now.
![Stick Out Tongue](https://www.clublexus.com/forums/images/smilies/tongue.gif)
how u like that new intercooler setup?
Last edited by sakataj; 07-18-09 at 01:14 PM.
#81
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This past month, I've been extremely busy getting the car back together for a show this Sunday plus 2 more events next week. Three shows in 6 days and I'm still finishing up on the mods, plus I'll slip in mods in between the two weekends.
I wanted to chime in to this thread, but it's just too hard right now. After this post, I'm essentially offline until Monday.
Here's the car and "some" of the updates as of today. I'll probably post a separate thread with details after the last show is over next week.
Just a teaser for now.![Stick Out Tongue](https://www.clublexus.com/forums/images/smilies/tongue.gif)
![](https://www.clublexus.com/gallery/data/500/DSCN5606.JPG)
I wanted to chime in to this thread, but it's just too hard right now. After this post, I'm essentially offline until Monday.
Here's the car and "some" of the updates as of today. I'll probably post a separate thread with details after the last show is over next week.
Just a teaser for now.
![Stick Out Tongue](https://www.clublexus.com/forums/images/smilies/tongue.gif)
#82
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This past month, I've been extremely busy getting the car back together for a show this Sunday plus 2 more events next week. Three shows in 6 days and I'm still finishing up on the mods, plus I'll slip in mods in between the two weekends.
I wanted to chime in to this thread, but it's just too hard right now. After this post, I'm essentially offline until Monday.
Here's the car and "some" of the updates as of today. I'll probably post a separate thread with details after the last show is over next week.
Just a teaser for now.![Stick Out Tongue](https://www.clublexus.com/forums/images/smilies/tongue.gif)
![](https://www.clublexus.com/gallery/data/500/DSCN5606.JPG)
I wanted to chime in to this thread, but it's just too hard right now. After this post, I'm essentially offline until Monday.
Here's the car and "some" of the updates as of today. I'll probably post a separate thread with details after the last show is over next week.
Just a teaser for now.
![Stick Out Tongue](https://www.clublexus.com/forums/images/smilies/tongue.gif)
![EEK!](https://www.clublexus.com/forums/images/smilies/eek1.gif)
![Thumb Up](https://www.clublexus.com/forums/images/smilies/thumbsup.gif)
#83
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hey I was just talking w/ a friend/ coworker about A/F ratios and the SAFC etc. wht I'm wondering is, right now I know I'm running way rich, most likely because of the 550cc injectors whoever put in for whatever reason, and the SAFC doesn't have enough range to lean it out enough. I know I can go full stand alone and control everything including the vvti and timing etc. but is there something in between? something that will at least control the a/f stuff so I can have optimal ratios at WOT? maybe include some other functionality like timing control or even vvti?
1. change out the injectors to something smaller that the SAFC can control, I have a set of 440's I think laying around if you are interested
2. Go standalone but again you will be a guinea pig, no one to my knowledge has a standalone working in a 98+ GS400 and let me qualify that. There are folks that have managed to get something installed but they have lost many of the creature comforts of the GS like Dashboard, electircial controls, heat AC etc. All of that is controlled by the Lexus computer.
Now I have been out of touch for a while so maybe someone has been able to get it working with a standalone, if so I would love to hear about it.
#84
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I'll take your 440's, how much, they should be within the range of the SAFC, I like your intercooler setup, i want to do something similar but change the cooler to one with both connections on the same side plus your air filter setup, how big was the hole you had to cut?
Last edited by gs400 civi; 07-20-09 at 12:07 PM.
#86
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hey thanks gill, I'll look through that thread/ try to get the info, although, JPI hasn't been too interested so far since they did this stuff so long ago. On another note I've ordered both my tc and headers. The shop I'm having install them is wondering about the header bolts and if they are the same size (direct bolt on headers) this is what I told him but he wants to be sure, he doesn't want to deal with header bolts breaking etc. and then having to remove the head etc.
#87
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Hey GS400civi is your car converted to a return fuel system or is it still the factory returnless? I have a return line setup on mine and the SAFC did not like mid range on my car. Also I have a NEO and before my engine suffered catastrophic failure we decided to use a GM 2 BAR map sensor to control air flow numbers using 1 bar for vaccum and 1 bar for boost. I don't know if this would work for a supercharged car but with my turbo car it made the SAFC more linear and there were no dead spots in the reading to the afc. Let me know about the injectors PM'ed you again.
Thanks,
Allen
P.S. The liines in RMMGS4's intercooler look to be a N2o cooler for the charge air to the intercooler. maybe co2?? Beautiful setup by the way!!!
Thanks,
Allen
P.S. The liines in RMMGS4's intercooler look to be a N2o cooler for the charge air to the intercooler. maybe co2?? Beautiful setup by the way!!!
#88
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Yes the lines are for my CryO2 from DEI. The S-Max intercooler also has internal tubes to internally freeze the air in addition to the external spray bar, plus I have a fuel block passing CO2 right before the fuel rails to chill the gas. Still working out the bugs before I can guage the performance improvement.
As for the Intake, it's double the size of the original filter, plus of course it's all cold air utilizing the right side intake duct from my air dam. No holes were cut. Since I re-routed my IC piping I used the old IC pipe location to run the intake hose.
I had less than 2 hours sleep before the show this past Sunday, plus I fried in the hot sun. I need to get ready for my Company car show this Friday, followed by HIN on Saturday.
Once it's all over, I'll try to post a new thread with more pics and details, some time next week.
Catch you guys later.
Last edited by RMMGS4; 07-21-09 at 07:20 PM.
#89
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A word about your headers I would order a new header to cats gasket and a header gasket. some have reused the cat crushable ring gasket if it looked ok. S&S sends you a paper header gasket don't use them $30-35 for header gasket and $20 for 2 cat gasket is cheap insurance for all the labor & hassle s to get the headers in. Just my $.02
I have the first gen headers on my car going on 3 years and mine have never cracked. I believe the reason why is because I had a bead welded around the perimeter of each tube at the flange. S & S only welds from the inside of the flange. I suggest you spend the 20 or so bucks to do what I did.
It's MORE cheap insurance !!
Last edited by RMMGS4; 07-21-09 at 07:21 PM.
#90
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2. Go standalone but again you will be a guinea pig, no one to my knowledge has a standalone working in a 98+ GS400 and let me qualify that. There are folks that have managed to get something installed but they have lost many of the creature comforts of the GS like Dashboard, electircial controls, heat AC etc. All of that is controlled by the Lexus computer.