Octane Booster
Thread Starter
Instructor
Joined: May 2010
Posts: 180
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From: Toronto, Ontario
A compression test is where you take out the spark plugs and screw in a pressure gauge called a compression tester. Then you crank the engine and read the pressure on the gauge. A healthy 968 should make about 200psi IIRC. A similar test, called a leakdown test, should be done at the same time, which involves feeding air pressure into the spark plug hole and measuring the flow - high flow indicates a leak, and you can listen to engine parts to isolate the leak, and you can know the general state of the engine's health.
At 100k miles, I don't think you need to worry about it though.
Chip - there are lots of opinions but I saw a comparison once which ranked the promax chip as the best. http://www.promaxmotorsport.com/
I also heard that Deutsch Nine is in the process of making one, and they never bother making something unless it's the best one on the market, so maybe you can give them a call. http://www.deutschnine.com/index.php
At 100k miles, I don't think you need to worry about it though.
Chip - there are lots of opinions but I saw a comparison once which ranked the promax chip as the best. http://www.promaxmotorsport.com/
I also heard that Deutsch Nine is in the process of making one, and they never bother making something unless it's the best one on the market, so maybe you can give them a call. http://www.deutschnine.com/index.php
On the Promax site - there are a few different ones for the 968 - do you know which one I should purchase if I decide to go the Promax route?
http://www.promaxmotorsport.co.uk/ca...ing-chips.aspx
Race Director
Joined: Jul 2001
Posts: 10,194
Likes: 10
Thanks for the explanation...I emailed Deutsch Nine to see if they are making one - I'll let you know.
On the Promax site - there are a few different ones for the 968 - do you know which one I should purchase if I decide to go the Promax route?
http://www.promaxmotorsport.co.uk/ca...ing-chips.aspx
On the Promax site - there are a few different ones for the 968 - do you know which one I should purchase if I decide to go the Promax route?
http://www.promaxmotorsport.co.uk/ca...ing-chips.aspx
Thread Starter
Instructor
Joined: May 2010
Posts: 180
Likes: 0
From: Toronto, Ontario
Thank you - Mark Sheperd from D9 told me you had one just a few mins ago...what is the difference between the Promax and the D9? Also what is the CEL the check engine light? Is there anyway that this can be resolved?
Rennlist Member
Joined: Feb 2003
Posts: 9,733
Likes: 24
From: NJ
Yes, CEL is check engine light. The D9 chip seems to have better midrange in comparison to the Promax chip. All in all, the chips smooth out the idle and clean up the acceleration through the rev range.
I recently went back to the stock chip and found the stock chip to be very close in performance. The big difference was idle smoothness (lack of) and some midrange (which seems like the stock chip runs a bit leaner to the D9 chip).
All in all, not a bad investment.
I recently went back to the stock chip and found the stock chip to be very close in performance. The big difference was idle smoothness (lack of) and some midrange (which seems like the stock chip runs a bit leaner to the D9 chip).
All in all, not a bad investment.
Thread Starter
Instructor
Joined: May 2010
Posts: 180
Likes: 0
From: Toronto, Ontario
Yes, CEL is check engine light. The D9 chip seems to have better midrange in comparison to the Promax chip. All in all, the chips smooth out the idle and clean up the acceleration through the rev range.
I recently went back to the stock chip and found the stock chip to be very close in performance. The big difference was idle smoothness (lack of) and some midrange (which seems like the stock chip runs a bit leaner to the D9 chip).
All in all, not a bad investment.
I recently went back to the stock chip and found the stock chip to be very close in performance. The big difference was idle smoothness (lack of) and some midrange (which seems like the stock chip runs a bit leaner to the D9 chip).
All in all, not a bad investment.
RL Community Team
Rennlist Member
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Joined: Jun 2004
Posts: 11,014
Likes: 26
From: San Francisco Area
If I went with promax, I would definitely get a 7100 chip. Only a race engine should use something higher IMHO. I think they are all the same software, just with different rev limiters (the 7100 chip has a rev limit at 7100 rpm, for example).
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Rennlist Member
Joined: Feb 2003
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From: NJ
I have run the chip for over 2 yrs and am very pleased with it. It compared well to other chips.
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Joined: Feb 2003
Posts: 9,733
Likes: 24
From: NJ
While we are still on the subject. I just swapped my ecu during break and the difference is noticeable. The car revs much smoother and pulls a bit cleaner through the rev range. $$ well spent. As a bonus, the CEL only comes on sometimes 
.
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Joined: Sep 2007
Posts: 467
Likes: 2
From: Espoo, Finland
Weight is the absolute easiest way to pick up performance. I am considering going to a Lexan rear glass, Carbon fiber hood and racing seats/battery. I think doing all at once would be a nice increase in performance. Any guess on total weight reduction that would be. I am guessing about 150lbs.
20-30lbs with lexan rear glass
10-20lbs GF/CF hood
40-50lbs racing seats
20-25lbs racing battery
total 90lbs - 125lbs saves. Figures just estimates.
I have those + few extras, and I've saved 160lbs. could loose 50-100lbs still, quite easily.
yes, makes car little more eager to accelerate and turn. you get used to the performance quite fast.
Drifting
Joined: Jan 2010
Posts: 3,334
Likes: 8
From: Nebraska
I would have expected just a little more savings from the hood. My shocks are shot and boy does that thing feel heavy. As far as the Lexan glass, I have searched for this answer but still have not found it. Can it be tinted dark or can it be purchased that way?
RL Community Team
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Joined: Jun 2004
Posts: 11,014
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From: San Francisco Area
Well judging by the fact that lexan water bottles come in all shades and colors, I'm sure you could order your hatch any way you want. As for applying tint film to lexan, I suggest calling a few local tint shops and asking them.
