Tony D Posted May 23, 2008 Share Posted May 23, 2008 Im thinking 300hp would get you realllly close to 150. If you think about it its twice the hp of the car. Close, but not over. That was the contention of the $1 bet John and I had running for years. The problem: (see aero forum) With a G-Nose, the speed potential will go up QUITE a bit. Our Bonneville car is not that powerful, only slightly more than 300 to the rear wheels, but the rake, G-Nose, etc on the car gets us what we need to go fast. At ElMirage, I watched a dual-quad 380CID chevy powered car go 155 against our 163 that very same day. Of course he was convinced his 'snowplow' front end was 'really really aerodynamic, he had someone design it for him'...and it looked like one of those big snowplows you see in the northern states, with a big scoop out front, flat front, and almost vertical front end with a totally closed radiator area. BIG block of plywood basically...and no headlight covers at all! Right now, there is a car (#236) that has a chopped roof and nice looking front end that looks like it should make some downforce...I think he has gone 170+ at ElMirage thusfar. Almost on par with the Opel GT he formerly had the driveline in (we are truly diseased)... This last shot was taken before he got the car painted, the first year after the Opel GT flat spinned and endoed three times in the same event. That pretty much did in that chassis... Quote Link to comment Share on other sites More sharing options...
Evan Purple240zt Posted May 23, 2008 Share Posted May 23, 2008 How does a motorcyle verify a speed? From what I've heard bike speedos are just as off, if not MORE off than most cars. GPS is the only realistic way for the average person to verify a speed in my opinion. That or a ticket... Don't get your panties in a wad. I didn't post that to start a pissing contest of a new busa speedometer accuracy. Hell will freeze over before you see me anywhere near that speed, let alone with a GPS. Evan Quote Link to comment Share on other sites More sharing options...
Gollum Posted May 23, 2008 Share Posted May 23, 2008 Don't get your panties in a wad. I didn't post that to start a pissing contest of a new busa speedometer accuracy. Hell will freeze over before you see me anywhere near that speed, let alone with a GPS. Evan Sorry, didn't mean to seem upset or anything. I just wanted to point out that bike speedo accuracy has been discussed on these forums by people that HAVE verified their "accuracy" that's all. I never meant to argue. If the bike has been known to be accurate, then that's fine. I also don't doubt that the speeds started are possible. I just wanted to know if there was more info than just "veified by bike" because more details would have been appreciated. That's all. Never meant to come across as argumentative. Sorry. Quote Link to comment Share on other sites More sharing options...
Evan Purple240zt Posted May 23, 2008 Share Posted May 23, 2008 Sorry, didn't mean to seem upset or anything. I just wanted to point out that bike speedo accuracy has been discussed on these forums by people that HAVE verified their "accuracy" that's all. I never meant to argue. If the bike has been known to be accurate, then that's fine. I also don't doubt that the speeds started are possible. I just wanted to know if there was more info than just "veified by bike" because more details would have been appreciated. That's all. Never meant to come across as argumentative. Sorry. I didn't mean to come across as a tool bag. My apologies for sounding short. Alot of people on forums have been trying to call me out lately on various wierd details so I have been kind of testy as of late. Sorry! Evan Quote Link to comment Share on other sites More sharing options...
ShaggyZ Posted May 23, 2008 Share Posted May 23, 2008 I didn't mean to come across as a tool bag. My apologies for sounding short. Alot of people on forums have been trying to call me out lately on various wierd details so I have been kind of testy as of late. Sorry! Evan So cute... Quote Link to comment Share on other sites More sharing options...
zdizeez Posted June 6, 2008 Share Posted June 6, 2008 I see no reference to rear ends here. How many run the original half shaft rears? I had to have a solid rear end to run at the drags. Quote Link to comment Share on other sites More sharing options...
johnc Posted June 6, 2008 Share Posted June 6, 2008 How many run the original half shaft rears? Me. Quote Link to comment Share on other sites More sharing options...
skipjobe Posted June 20, 2008 Share Posted June 20, 2008 128MPH so far still working on it. I am running the stock rear. Z pics Quote Link to comment Share on other sites More sharing options...
HLS30-08077 Posted June 20, 2008 Share Posted June 20, 2008 141 MPH I-5 northbound near Mount vernon WA. Downhill, great tailwind 1/4 tank of gas and no passenger. Radar went off and had to slow down before top speed was reached. Maybe next time. Dave. Stock L24 E-88 head Stage 2 cam (480/277) 6 into 1 ceramic coated header Triple Weber 40DCOE's Mallory Unilite Dizzy Mallory Promaster Coil MSD 6A 79' ZX 5-speed 3:90 LSD R-200 w/ turbo CV's 225/50ZR16's on 16x7.5 Eagle Alloys Xenon front air dam Bre rear spoiler Eibach PR springs KYB Struts ES urethane everywhere Quote Link to comment Share on other sites More sharing options...
skipjobe Posted June 23, 2008 Share Posted June 23, 2008 74 260Z with a mild 350 stock rear. 128MPH so far two people and windows down I had a stock 74 240Z it would show 125MPH I had a 75 stock 280Z it would show 115 my 74 with a mild 350 sbc GPS 128 mph with two people in it My 94 Camaro with a heavly modded 350 with 3.73 would hit the rev limiter at 6800 145mph With the new 383 forged motor with 4.11 gears about 125mph. est. Quote Link to comment Share on other sites More sharing options...
johnc Posted June 23, 2008 Share Posted June 23, 2008 skipjobe, You need to fix those image links. Quote Link to comment Share on other sites More sharing options...
jgkurz Posted June 23, 2008 Share Posted June 23, 2008 141 MPH I-5 northbound near Mount vernon WA. Downhill, great tailwind 1/4 tank of gas and no passenger. Radar went off and had to slow down before top speed was reached. Maybe next time. Funny...you and I must have been on the same stretch of road. http://forums.hybridz.org/showpost.php?p=862551&postcount=136 Quote Link to comment Share on other sites More sharing options...
Guest 350zgto Posted June 30, 2008 Share Posted June 30, 2008 145 or so. Front end was light, car accelerating like mad lifting up the front suspension. 350 V-8, 427 HP, Tremec .68 in 5th gear, 3:36 rear end, 26.5" tall tire, engine wasn't even beginning to work hard, was only turning @ 4200 RPM. Trans calculator says 201 MPH at 6000 RPM but I don't think it would redline in 5th, it is pushing too much air under the car. It will redline 4th gear, 137 MPH. No spoilers, no air dams. Stock body. Need areo improvments for top speed. I think 175-180 is doable. Above 130 MPH, the springs feel soft and the front end will wander with increased toe-in from the front end lifting. Quote Link to comment Share on other sites More sharing options...
Quin Posted June 30, 2008 Share Posted June 30, 2008 130 in my old Celica with the front end about to pop off the ground, 140 in my Supra (solid as a rock, felt just like 50MPH), and a friend's Mustang GT (was okay, not great, maybe a little shakey but still perfectly managable), me driving. Welllll over 160 in my uncle's Cobra. We maxed out his speedo and kept going for another ten seconds or so, car was still pulling HARD. Had trouble lifting my head from the seat... That was the ride that got me into cars. When my Supra ran, 100-120 was a daily thing. Still do it pretty often in a buddy's Z28 (you REALLY feel the speed in that car, in the Supra it was nothing). Quote Link to comment Share on other sites More sharing options...
HoustonZ Posted June 30, 2008 Share Posted June 30, 2008 160mph in a Z06 down the straight at Texas World Speedway. The car felt solid as a rock. Quote Link to comment Share on other sites More sharing options...
StrongBad009 Posted July 2, 2008 Share Posted July 2, 2008 in 1990 i had a miata that i did 135 on the open road with the headlights down. with the headlight ups could only achieve 128!!!!! 135 damn i top out at 128 in my mazdaspeed in 6th at 7k. Quote Link to comment Share on other sites More sharing options...
espo280zx Posted July 3, 2008 Share Posted July 3, 2008 150, and seems like itd still pull. stock 280zx all around. l28. stock tires n rims. stock gear ratios, i believe 363? maybe. 6500rpms. and i will never do it again cause it sounded like it will blow up. Quote Link to comment Share on other sites More sharing options...
Gollum Posted July 3, 2008 Share Posted July 3, 2008 Even on the high 3.9 rear diff 6500rpm would be 165mph. Tough to believe if you ask me. On the other common ratio, 3.545 6,500 rpm would be 181mph. Now, if you were running a 185/60-14 6,500 RPM is now 152, but the speedo would read about 165mph. So maybe your tires were a tad smaller than stock? I've take a couple 280ZX's up to their top stock speed with as much safe highway as I had, and once it gets to 4,500 it's a tough climb to about 5,000 when it really feels like the engine just doesn't want to keep going. That's about 130mph, granted I was using a slightly larger than stock tire size. Quote Link to comment Share on other sites More sharing options...
jtl260z Posted July 3, 2008 Share Posted July 3, 2008 I hit 155-160 MPH on my Autometer speedo with a 4.11 and a 5 speed. The needle was bouncing a little due to the road conditions. 1974 260z, highly modified with stock L6 bottom end. Quote Link to comment Share on other sites More sharing options...
Savage42 Posted July 3, 2008 Share Posted July 3, 2008 135 mph in my VG30ET powered 510. 155 mph (speed limited) in my 2000 BMW 540i 6 speed. 160 mph (limited due to 4.10 rear gears & 4 speed) in 1970 Plymouth AAR Cuda Factory Trans-Am racer. Went 185 mph down the back straight at Daytona (running the road course config) in a '73 Dodge Challenger Petty kit car drove by a young rookie named Dale Earnhardt and driven by Marty Robbins & Pete Hamilton. Stock body, but tube frame with sheet metal floor. You could buy these turn-key cars from Chrysler back in the day. Quote Link to comment Share on other sites More sharing options...
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