Al N. Posted August 27, 2007 Share Posted August 27, 2007 Ambient Temp that day was 90 deg F, very humid. More when I have time... http://www.usa7s.com/aspnetforum/upload/1336934375_Al Navarro SS.jpg Link to comment Share on other sites More sharing options...
slngsht Posted August 27, 2007 Share Posted August 27, 2007 so it looks like 147 hp and 122 ft.lbs at the wheels? Is this your baseline? Link to comment Share on other sites More sharing options...
Al N. Posted August 27, 2007 Author Share Posted August 27, 2007 That is the baseline, yes...a little underwhelming given all the sound and fury, no? I did a quick search online and couldn't find too many dyno charts for Zetecs in the config most Se7ens run. Link to comment Share on other sites More sharing options...
slngsht Posted August 27, 2007 Share Posted August 27, 2007 That is the baseline, yes...a little underwhelming given all the sound and fury, no? I did a quick search online and couldn't find too many dyno charts for Zetecs in the config most Se7ens run. Well, that works out to 169hp at the flywheel. Given the heat and humidity, isn't that about right for your engine? Link to comment Share on other sites More sharing options...
Al N. Posted August 27, 2007 Author Share Posted August 27, 2007 They claim 200 or so HP...how much of a factor is the heat/humidity... FWIW, I could see having a "north-mid-atlantic" meet revolving around something at Carlisle, staying at Allenberry (a rustic, somewhat musty resort that I happen to love for all its unrestored antiquity...not unlike Tapoco Lodge), and doing a dyno day at this place about 15 minutes away. Good fishing, and probably some good country roads if I look hard enough. Maybe for the 2008 kit car show... Link to comment Share on other sites More sharing options...
slngsht Posted August 27, 2007 Share Posted August 27, 2007 I was kinda thinking about going to Carlisle for the Corvette weekend last Saturday. They had a major disaster... Strong storms blew through. Destroyed a bunch of cars. Sent 12 people to the hospital, including one guy in critical condition. I don't think heat/humidity drops you from 200 to 170. That's kind of a drastic drop for a normally aspirated engine. But more qualified people can chime in on that. Link to comment Share on other sites More sharing options...
Davemk1 Posted August 27, 2007 Share Posted August 27, 2007 I could see the heat hurting you a little bit but not nearly that much. I'm lucky to have a good friend who is head engineer at Dynotech here in Montana. Yes the Dynotech dynos are built here. He let me on the dyno for a six pack and it's was interesting. I have a 1997 ZX1 with hydraulic lifters. It's running Webers and headers in my Birkin but it's otherwise stock. I got 126hp @ 5500 rpm and 123 lbs/ft from 3000 - 5400 rpms at the wheels. The air/fuel stays pretty darn flat being between 12.5 - 14:1 all the way. I figured this might give you another data point to help or confuse. Dave Link to comment Share on other sites More sharing options...
Al N. Posted August 27, 2007 Author Share Posted August 27, 2007 I was there on Sat saw a bunch of Vettes...just missed the storm in Carlisle...but ran into bad weather on 78 headed East between 5 and 7 pm...had dinner with my Mom and made it home just in time to throw the cover on before the sky opened up. Link to comment Share on other sites More sharing options...
yellowss7 Posted August 27, 2007 Share Posted August 27, 2007 Al, that's a nice flat torque curve. My limited understanding is that that's what matters. Usable power! The Yellow Breeches is a nice stream. Good White Fly hatch on right now!! Pretty good fishing all year long due to the spring fed lake across the road. Some nice twisty roads in that area too. Tom Link to comment Share on other sites More sharing options...
Al N. Posted August 27, 2007 Author Share Posted August 27, 2007 Thanks Dave! Do you know what your set up is rated at in terms of crank HP? It would be interesting to see how various Zetecs measure up in terms of claimed vs. actual. And no, I'm not trying to start a "he said-he said" thing here...just wanted to post what my baseline dyno results were....for $75, it was definitely good to see where the car stands as is. BTW, Ray & Bobby McNew were great to work with and were very accomodating/understanding. Although they are not Se7eners (yet!), they are very well versed in Zetec tuning and are Ford Racing parts distributors. Ray has thought of building a Se7en and of course I did nothing but encourage him! McNew's Automotive (Dyno & Zetec Tuners) Link to comment Share on other sites More sharing options...
Al N. Posted August 27, 2007 Author Share Posted August 27, 2007 The Yellow Breeches is a nice stream. Good White Fly hatch on right now!! Pretty good fishing all year long due to the spring fed lake across the road. Some nice twisty roads in that area too. Since my bro has lived there for a while, I've fished all the streams in that area with him. I wanted to stay Sat night to see/fish the infamous Yellow Breeches white fly hatch, but had to get back home. Norm's (my brother) is a local now, and most of the people on the Breeches would know him as "Doc". While the run and the Breeches are a little overfished/get a lot of anglers, what I like is that you know there are fish in the water...and some of them quite large. I could really see the Kit Car show as a good USA7s Northeast meet up for 2008 (though NOT to replace the VIR meet already in the works)...I'm pretty sure they have an Auto-x in conjunction with the show... Link to comment Share on other sites More sharing options...
yellowss7 Posted August 27, 2007 Share Posted August 27, 2007 Al, one of the better drivers in the Philly region has a Shop called Bimmerworks. He is looking at a dyno that he said bolts to the hubs and takes away the variation due to tires, tie down straps. etc. I'm sure he'd be glad to host a day for the 7's. He wants one too, but is putting all of his money in his business. Tom Link to comment Share on other sites More sharing options...
Davemk1 Posted August 27, 2007 Share Posted August 27, 2007 Thanks Dave! Do you know what your set up is rated at in terms of crank HP? I've been told by folks in the know that my set up should have about 145hp. And if one uses the 15% drivetrain loss correction as recommended by my Dynotech friend (126 x 1.15= 144.9) then my numbers come out just right at 144.9hp. So in my case it all seems to add up. As I recall Dynojet systems correct for altitude as well as temperature. Dave Link to comment Share on other sites More sharing options...
Al N. Posted August 27, 2007 Author Share Posted August 27, 2007 Vid of the 3rd Dyno Run. I could listen to this many many times and still not tire of it... Link to comment Share on other sites More sharing options...
Boxologist Posted August 27, 2007 Share Posted August 27, 2007 dynojets are supposed to give decent numbers. Mustang dynos tend to be known as heartbreakers for reading low. Wonder what (if any) correction factors were used? if its an AWD setup he has, find out what what he dynos stock 01-04 WRXs (185-190 awhp) and 04-06 STIs (220-230 awhp) and it can tell u how it reads. Link to comment Share on other sites More sharing options...
xflow7 Posted August 27, 2007 Share Posted August 27, 2007 Very cool, Al. :bigears: I'm dying to get my car on a dyno. I know a Sevener in Michigan (author of http://www.thecaterhamproject.com) with the SVT Zetec installation from Caterham USA. His car was always quick, but I seem to recall he had it into a dyno shop up there (Paul's HP in Jackson, MI) and uncovered some kind of fueling and/or timing issue that once resolved noticeably improved it (though I've not ridden in it since). I've mentioned the site to him before, but he's had alot going on this year so may not have had time to swing by. I'll try to ping him again and see if my memory is right and if he has anything to add. Dave Edlt: Just now noticed that his website appears to be defunct. Link to comment Share on other sites More sharing options...
JBH Posted August 28, 2007 Share Posted August 28, 2007 Al: Based on my track time at VIR, I would guess my hp and torque are similar to yours - this strictly based on my experience in following and then passing a FF. The good news is the torque curve is pretty flat between 5000 and 6600 rpms and your A/F looks constant throughout the range. I have no way of knowing if the 15% drivetrain loss is correct. I would send the results to Caterham USA and see if they can give you any insights/suggestions. I will try to find a dyno here to provide a comparison. Love the video - it must be the throttle bodies that give it that great exhaust note. Link to comment Share on other sites More sharing options...
Cherik Posted August 28, 2007 Share Posted August 28, 2007 Al, for these runs it matters which gear you use. In the t9 5spd box, you need 4th gear (=direct), in the BGH 6spd (Caterham...) it's 6th gear that is direct. The non-direct gears add two loaded gear pairs in between, each taking their share. Using Redline MTL gearoil brings a bit more and gives better shifts and lastly 75/90 Mobil1 synthetic in the differential. As far as 150BHP/122ftlbs at the wheels (approx 175BHP/140ftlbs at the crank). sounds reasonable, as the 200HP quoted is usually SAE horsepower. SAE HP's are quoted with no ancillaries - i.e. no pumps, no alternator etc etc. Usually this is 12..15%. Then.. the later Zetec's (> '01) recommend running 5w20 oil, and of course lots of controversy about why (CAFE rules etc.) it does offer lower friction than 5w30 and this does make a difference >6000rpm, which is where you're trying to get a reading. It all adds up. Link to comment Share on other sites More sharing options...
Al N. Posted August 28, 2007 Author Share Posted August 28, 2007 Cherik-Thanks for the tips...I think we did these in 4th (I had told them 6th was 1:1...didn't know it was literally direct). I think that as long as we do future runs in the same gear we did the baseline (or redo the baseline in 6th), we should be good, right? As long as you are comparing before apples to after apples... Link to comment Share on other sites More sharing options...
Cherik Posted August 28, 2007 Share Posted August 28, 2007 yes, correct on the last one - rerun in 4th for ref, but do subsequent reads in 6th. The layshaft will still rotate (it always does whenever the clutch is engaged), but it'll be unloaded, and thus minimal losses. With Redline MTL this difference will be less. Link to comment Share on other sites More sharing options...
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