Cam timing effects, 32V
#196
What made you go down this rabbit hole?
The HP increases in the upper RPMS as I am sure you know would require changes to the breathing path - this is where the "hard parts" tuning of an engine and its operational envelope happen. You may have hit the 80/20 rule on tuning THIS engine with THESE pieces and THAT computer - but if you were to change anything in that system for the better, you would use your talents (strong talents I might add) even better. I think a Duel Throttle body going into two side bellows straight into the runners is a next N/A step, or you could use your tuning time on learning an ECU like the new AEM that is just out and is said to be the most advanced. Or get a turbo.
The HP increases in the upper RPMS as I am sure you know would require changes to the breathing path - this is where the "hard parts" tuning of an engine and its operational envelope happen. You may have hit the 80/20 rule on tuning THIS engine with THESE pieces and THAT computer - but if you were to change anything in that system for the better, you would use your talents (strong talents I might add) even better. I think a Duel Throttle body going into two side bellows straight into the runners is a next N/A step, or you could use your tuning time on learning an ECU like the new AEM that is just out and is said to be the most advanced. Or get a turbo.
#197
Just add in some E85 to the 87 so you an go back to 0 now.
#198
Craic Head
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Thanks for all of your efforts though!
#200
Breathing, I tell you, breathing
#201
Inventor
Rennlist Member
Rennlist Member
Thread Starter
Breathe deep, the gathering gloom...
I think a turbo(super)charger would work great at this -12°. If anything, I've shown the compression effects of the retard. I should do a comparison cranking compression check, but I'm feeling lazy.
I drove a friend's turbo SAAB the other day, I liked it.
No 'Black Edition' chips. ('Vaporware' they used to call it.) I'm going back to zero cam, putting the 3.6 chips and super back in, and call it a day/year.
I think a turbo(super)charger would work great at this -12°. If anything, I've shown the compression effects of the retard. I should do a comparison cranking compression check, but I'm feeling lazy.
I drove a friend's turbo SAAB the other day, I liked it.
No 'Black Edition' chips. ('Vaporware' they used to call it.) I'm going back to zero cam, putting the 3.6 chips and super back in, and call it a day/year.
#202
Still think you should buy an aftermarket ECU. Play around it it on a test car. How about my car and my ecu?
#203
Three Wheelin'
Ken, We set her up and measured - both cams were advanced 3 degrees (you were correct in your assessment of my dyno chart). We adjusted the cam timing -2 pass side / 0 on the driver side... Took it for a quick romp and the "***-o-meter" says it was a success. I dont have a dyno handy, but the trip to Altoona, PA, tomororw should tell me what I need to know Once I get her on a Dyno I'll send ya the results! Thanks for the advice and assistance.
#204
Nordschleife Master
Yes.. in particular, this post here would be a good place to start
https://rennlist.com/forums/9579909-post13.html
https://rennlist.com/forums/9579909-post13.html
#207
Rennlist Member
Hello,
This thread is pretty old... I have an 88 S4. After review all this thread, I understand that the normal setting is supposed to be -2 (1-4) and 0 (5-8), cold, with an used timing belt, 0,0 for a new one.
I noticed also that the setting -6(1-4) and -4(5-8), make some owners happy. Is someone having more feedback on that setting?
Raphael
This thread is pretty old... I have an 88 S4. After review all this thread, I understand that the normal setting is supposed to be -2 (1-4) and 0 (5-8), cold, with an used timing belt, 0,0 for a new one.
I noticed also that the setting -6(1-4) and -4(5-8), make some owners happy. Is someone having more feedback on that setting?
Raphael
#208
Rennlist Member
Hello,
This thread is pretty old... I have an 88 S4. After review all this thread, I understand that the normal setting is supposed to be -2 (1-4) and 0 (5-8), cold, with an used timing belt, 0,0 for a new one.
I noticed also that the setting -6(1-4) and -4(5-8), make some owners happy. Is someone having more feedback on that setting?
Raphael
This thread is pretty old... I have an 88 S4. After review all this thread, I understand that the normal setting is supposed to be -2 (1-4) and 0 (5-8), cold, with an used timing belt, 0,0 for a new one.
I noticed also that the setting -6(1-4) and -4(5-8), make some owners happy. Is someone having more feedback on that setting?
Raphael
For a stock car, I would just go with the factory recommended settings. Sure, you can change the cam-timing, but on a stock car, there will be no appreciable difference.
#209
Rennlist Member
Hello,
This thread is pretty old... I have an 88 S4. After review all this thread, I understand that the normal setting is supposed to be -2 (1-4) and 0 (5-8), cold, with an used timing belt, 0,0 for a new one.
I noticed also that the setting -6(1-4) and -4(5-8), make some owners happy. Is someone having more feedback on that setting?
Raphael
This thread is pretty old... I have an 88 S4. After review all this thread, I understand that the normal setting is supposed to be -2 (1-4) and 0 (5-8), cold, with an used timing belt, 0,0 for a new one.
I noticed also that the setting -6(1-4) and -4(5-8), make some owners happy. Is someone having more feedback on that setting?
Raphael
#210
Rennlist Member
Thank you for your feedback. Reading several threads, I understand that the recommended setting is the same for all or most 32V (S3, S4, GT). But you're right. Before changing something I will start by recommended setting and when everything will be fine, I will see if it worth adjusting something.
Raphaël
Raphaël