Seattle Dyno Day...Thanks Skip!!!
02-18-2002, 01:40 PM
#1
Burning Brakes
Thread Starter
Seattle Dyno Day...Thanks Skip!!!
Sorry for the long post...
I want to thank Skip for organizing the dyno day held in Kirkland on Saturday. We had a really good turnout, and I for one had a blast!! It was great to meet a bunch of really nice guys, who all share a passion for these great cars. It was also good to see other models other than 944's represented - we had a beautiful Boxster S, 930's, C2 Turbo's, and a gorgeous 968.
I'm not sure if Skip made note of everyone's dyno results, it would be nice to have them all summarized in a post. There were also some photos taken, so we should try to get some posted.
I'll share my personal results with everyone. I managed to squeek out the highest hp numbers for the day. My little 2.5L managed 311 rwhp and 309 lb-ft of torque at 16psi of boost, and 325rwhp and 323 lb-ft torque at 18 psi of boost. I'm very happy with my results, and I'm especially pleased with my air:fuel curves, which are dialed in at a perfect 12.5:1 ratio under boost. It is possible to dial in these cars with MAF's!
The biggest lesson I got out of the dyno day - generic chips don't work, and people need to pay more attention to mapping of their fuel curves. A lot of the cars dynoed showed air:fuel ratios which started out too rich, and ended up too lean by the high rpms. I'm sure that a lot of other guys on this board would find similar results with their own cars. I think anyone who's modified their cars should get their a/f ratios measured on a dyno (w/ wideband O2 sensor), and look into custom chips, fuel controllers (ARC2, Unichip, etc), fuel enrichment modules and/or tweak the adjuster in the fuel distributors for the CIS 911 guys, or full engine management.
Thanks again Skip!!
I want to thank Skip for organizing the dyno day held in Kirkland on Saturday. We had a really good turnout, and I for one had a blast!! It was great to meet a bunch of really nice guys, who all share a passion for these great cars. It was also good to see other models other than 944's represented - we had a beautiful Boxster S, 930's, C2 Turbo's, and a gorgeous 968.
I'm not sure if Skip made note of everyone's dyno results, it would be nice to have them all summarized in a post. There were also some photos taken, so we should try to get some posted.
I'll share my personal results with everyone. I managed to squeek out the highest hp numbers for the day. My little 2.5L managed 311 rwhp and 309 lb-ft of torque at 16psi of boost, and 325rwhp and 323 lb-ft torque at 18 psi of boost. I'm very happy with my results, and I'm especially pleased with my air:fuel curves, which are dialed in at a perfect 12.5:1 ratio under boost. It is possible to dial in these cars with MAF's!
The biggest lesson I got out of the dyno day - generic chips don't work, and people need to pay more attention to mapping of their fuel curves. A lot of the cars dynoed showed air:fuel ratios which started out too rich, and ended up too lean by the high rpms. I'm sure that a lot of other guys on this board would find similar results with their own cars. I think anyone who's modified their cars should get their a/f ratios measured on a dyno (w/ wideband O2 sensor), and look into custom chips, fuel controllers (ARC2, Unichip, etc), fuel enrichment modules and/or tweak the adjuster in the fuel distributors for the CIS 911 guys, or full engine management.
Thanks again Skip!!
02-18-2002, 04:45 PM
#2
Addict
Rennlist Member
Rennlist Member
Very good numbers Ian.
Looking forward to dialing in the A/F ratio on my new SFR 2.82 ltr, I will be calling on your help.
<img src="graemlins/burnout.gif" border="0" alt="[burnout]" /> <img src="graemlins/burnout.gif" border="0" alt="[burnout]" />
Looking forward to dialing in the A/F ratio on my new SFR 2.82 ltr, I will be calling on your help.
<img src="graemlins/burnout.gif" border="0" alt="[burnout]" /> <img src="graemlins/burnout.gif" border="0" alt="[burnout]" />
02-18-2002, 04:55 PM
#4
Burning Brakes
Thread Starter
No problem Dave. I'd be more than happy to share my experiences with you. There are definitely some specific "must-haves" when it comes to setting up our cars with MAF's.
Your 2.82L motor should be a monster!! I must say though, I'm very happy with the combination of my 2.5L motor and the Stage 2 Huntley turbo. As shown on my dyno plots, I'm hitting peak torque at 3800rpm, and it stays nice and flat with increased rpm's. I know that a bigger turbo would provide more peak hp, but honestly...325rwhp is enough. Plus, I'd hate to have the lag at the lower rpms. You'll have the best of both worlds of course with your big motor. It'll easily support a bigger turbo if you choose to go that route, and you won't have to worry about turbo lag. Your car will easily put down 350rwhp+, at nice and reliable boost levels of around 16psi. Crank up the boost, and 400rwhp+ will be within your reach.
Your 2.82L motor should be a monster!! I must say though, I'm very happy with the combination of my 2.5L motor and the Stage 2 Huntley turbo. As shown on my dyno plots, I'm hitting peak torque at 3800rpm, and it stays nice and flat with increased rpm's. I know that a bigger turbo would provide more peak hp, but honestly...325rwhp is enough. Plus, I'd hate to have the lag at the lower rpms. You'll have the best of both worlds of course with your big motor. It'll easily support a bigger turbo if you choose to go that route, and you won't have to worry about turbo lag. Your car will easily put down 350rwhp+, at nice and reliable boost levels of around 16psi. Crank up the boost, and 400rwhp+ will be within your reach.