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Forced Induction Turbochargers and Superchargers..Got Boost?

did some racing, stopped by the track...

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Old Apr 25, 2005 | 10:23 AM
  #21  
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Originally Posted by homiusang
CLK55 does not come with a S/C, i believe it's has around 360bhp stock. Though CL55, SL55, E55 and S55 come S/C'd out from the factory after the year 2003.
Just a friendly note
And i think Charles was racing a CL55.
Nevermind, just realized I witnessed a E55 AMG dyno, the CLK and E just remind me of each other cause of the headlights.
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Old Apr 25, 2005 | 10:44 AM
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Default traction

Originally Posted by 350zDCalb
yah...i never thought i would be "complaining" about losing traction through 4th gear on 285's...but it is a disadvantage
i have learned to partial throttle 1st and 2nd...almost full throttle 3rd..then full throttle 4th-6th to really get up to speed quickly..
is there a way to set boost at say:
maximum 7psi 1st gear, 8 psi 2nd gear, 11 psi 3rd, 16 4th-6th...?
that would be cool

TODD
What you need is a good traction control system like:

http://www.racelogic.co.uk/traction/

I'm done with my LB and APS install , I'm seriously considering it.
What good is the power if you can't get it effectively to the pavement , except for frying expensive street tires. My 295 PSs cost >$360 each , ouch...
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Old Apr 25, 2005 | 11:50 AM
  #23  
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The Apex'i AVC-R boost controller has some kinda of gear judge system on it where different boost is applied to different gears. Had it on my RX7 but since rotaries don't put out alot of torque I never really need the gear judge feature.
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Old Apr 25, 2005 | 11:55 AM
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Originally Posted by G3po
What you need is a good traction control system like:

http://www.racelogic.co.uk/traction/

I'm done with my LB and APS install , I'm seriously considering it.
What good is the power if you can't get it effectively to the pavement , except for frying expensive street tires. My 295 PSs cost >$360 each , ouch...

That's why I'm going to be running 305 Nitto 555R's on my car when the turbos get installed...they'll last about 80% of what tires like the PSs S-03s and T1S's do...and they only cost $250 a tire. I should have no problem hooking up with 305 width drag radials...
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Old Apr 25, 2005 | 12:06 PM
  #25  
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Originally Posted by phunk
beat the car to all hell this weekend... it got bad starting last night I raced a CLK55 AMG from 80-110 and I only put 4-5 cars on him so I was worried that maybe something was wrong... I came back to the shop and did 2 dyno pulls and all the power was still there... sure enough that benz is just fast.

this morning I went to the track... I am a not a good driver at all.

My best run at 9.5psi of boost was 11.8@117mph.... on that run is probably the best driving run I did of the day. At 11.5psi it was one mistake after another down the track and I never managed better then a 11.6@122 (on a 1.813 60')... if i was better at handling the car and based on my mistakes, I really felt the car could have done a 11.3 today if I let someone else drive it.

I dunno... Ill get the videos off the camera but I need someone to host. any takers?

On the way back a new C6 Vette tried to race me... since I cant hook up below 80 on the street tires I had to give him low boost 9.5psi, i dunno... I guess I had him by far enough that im not sure if he was going all out or not? how fast are those things? Then some freakin GS400 wanted to give it a shot im not sure why but hey im always up for a race.
That was interesting what Charles did after he put 4 or 5 lengths on the Benz. He came back to dyno his car thinking something was wrong. Can you imagine what the AMG Benz owner must be thinking?? He probably went straight to the Benz dealer and told them something was wrong with his car cause he got stumped on by a "Nissan"!!! Got to love it!!
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Old Apr 25, 2005 | 01:50 PM
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Default tires

Originally Posted by BriGuyMax
That's why I'm going to be running 305 Nitto 555R's on my car when the turbos get installed...they'll last about 80% of what tires like the PSs S-03s and T1S's do...and they only cost $250 a tire. I should have no problem hooking up with 305 width drag radials...

Unfortunatley for a daily driver , the stagger is incorrect on a 305. I have found that 265F and 295R are as fat as you can go and keep the OEM VDC happy. I've used DRs in the past , they work great in a straight line but suck in the turns. If it's all about hooking up at the dragstrip , I'd use MTs.
And with >500rwhp , I and many other built TTs could fry 305 Nittos to a crisp very easily.

Last edited by G3po; Apr 25, 2005 at 01:53 PM.
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Old Apr 25, 2005 | 04:43 PM
  #27  
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How do you DL the movies. Very Nice setup.
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Old Apr 25, 2005 | 07:03 PM
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anybody know what offset 18x11 I need to run a 315/25/18 rear tire?

I need more grip!!! Not only do I refuse to take off my big brakes, but I care more for how my car runs when I really race it against another car, which is always on radials... no slicks for my best.
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Old Apr 25, 2005 | 07:31 PM
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Originally Posted by G3po
Unfortunatley for a daily driver , the stagger is incorrect on a 305. I have found that 265F and 295R are as fat as you can go and keep the OEM VDC happy. I've used DRs in the past , they work great in a straight line but suck in the turns. If it's all about hooking up at the dragstrip , I'd use MTs.
And with >500rwhp , I and many other built TTs could fry 305 Nittos to a crisp very easily.
A 305/35-18 (nitto size) in the rear is 1% difference from stock diameter. VDC is just fine with a 1% difference.

As for the DRs...and turns...if you want straight line traction, you have to make small sacrifices. If you wanted to improve straight line hook AND turning..you could go with the 555RII tires that are road race spec with the DR compound and tread pattern.

I DO have a set of M/T ET streets for the track...but I was just saying that a fat, low profile DR that doesn't wear too fast is a much more cost effective means of obtaining extra traction on the street. I know you could still potentially spin them easily..but they will hook MUCH better than normal street radials.

Last edited by BriGuyMax; Apr 25, 2005 at 07:33 PM.
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Old Apr 25, 2005 | 07:42 PM
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my friend had 555Rs on his TT 300zx and they couldnt hold power for CRAP compared to the BFGs he got next. I think my S03s are hooking up as good as his 555R's were
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Old Apr 25, 2005 | 08:05 PM
  #31  
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WHOAAAA!!!!!! Congrats Charles!!!
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Old Apr 25, 2005 | 09:29 PM
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thanks jason!

well i dunno I was gonna wait to put more miles on it before tuning further... but I think I will just keep at it. Im gonna figure out what I need to buy and get it on the way ASAP. I want a 10 second pass within the next few weeks... under my own crappy driving.

I might just put a crawford plenum on there for now until I work out something else... that will get me a lot of the power I am missing.
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Old Apr 26, 2005 | 09:35 AM
  #33  
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Default rear camber

Originally Posted by phunk
my friend had 555Rs on his TT 300zx and they couldnt hold power for CRAP compared to the BFGs he got next. I think my S03s are hooking up as good as his 555R's were
Something I have noticed. In general the rear camber on both Zs and Gs are negative to aid cornering stability. However; with very wide rear radials this results in lighter loading on the outside edge. When you launch, the weight tranfers to the rear and excerbates the situation by creating more negitive camber. So basically a significant portion of the tire does less work under hard straight-line acceleration. If I wanted to maximize straight line traction I would need to dial out the negative camber at the expense of handling.

Last edited by G3po; Apr 26, 2005 at 09:37 AM.
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Old Apr 26, 2005 | 06:16 PM
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Good point. Maybe some rear camber arms on 295's or 305's would be better than the stock negative camber with 315's. It is all about the contact patch and weight distribution for traction. Who races a 550whp around a corner anyway? With coilovers, and sways, the camber would not kill your handling, just slightly decrease it.
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Old Apr 26, 2005 | 07:20 PM
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does anyone know how much camber can be changed on the stock set-up in the rear...if at all?
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Old Apr 27, 2005 | 06:40 AM
  #36  
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Originally Posted by BriGuyMax
does anyone know how much camber can be changed on the stock set-up in the rear...if at all?
Id think you'd be lucky to get +.3 degrees. The stock eccentric bolts dont have much adjustment in them. Remember on our rear suspensions, when you bring camber in more positive, you make toe more negative, it can very frustrating for an alignment guy if your suspension is way out of spec. A little advice-if you want to go more positive, get some SPC bolts for camber and toe, dont get the camber/traction rods, Ive had problems with my traction arms(they broke while driving), and now I need both arms, and SPC bolts to bring my alignment into spec. The correct way to adjust toe is not by pulling the traction arm in, but thats what most people do. Also SPC toe/camber eccentric bolts are cheaper than going the camber/traction rod route. Ok sorry for the long post...
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Old Apr 27, 2005 | 12:25 PM
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Originally Posted by Alberto
Id think you'd be lucky to get +.3 degrees. The stock eccentric bolts dont have much adjustment in them. Remember on our rear suspensions, when you bring camber in more positive, you make toe more negative, it can very frustrating for an alignment guy if your suspension is way out of spec. A little advice-if you want to go more positive, get some SPC bolts for camber and toe, dont get the camber/traction rods, Ive had problems with my traction arms(they broke while driving), and now I need both arms, and SPC bolts to bring my alignment into spec. The correct way to adjust toe is not by pulling the traction arm in, but thats what most people do. Also SPC toe/camber eccentric bolts are cheaper than going the camber/traction rod route. Ok sorry for the long post...
Where can I pick up a set of those?
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Old Apr 27, 2005 | 01:12 PM
  #38  
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Originally Posted by phunk
my friend had 555Rs on his TT 300zx and they couldnt hold power for CRAP compared to the BFGs he got next. I think my S03s are hooking up as good as his 555R's were
BFG G-Force KD is by far the best tire out there, for traction and wear properties.
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Old Apr 27, 2005 | 02:02 PM
  #39  
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Default tires

Originally Posted by 002-M-P
BFG G-Force KD is by far the best tire out there, for traction and wear properties.

For straight line dry traction maybe. The PS2s last far longer ginven similar size and use.
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Old Apr 27, 2005 | 02:51 PM
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Originally Posted by BriGuyMax
Where can I pick up a set of those?
www.iapdirect.com under camber kits....
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