J Taylor Posted October 16, 2002 Share Posted October 16, 2002 Took the car back to the dyno today on some race gas just to see what it will do before and after the SDS install. Jacked the boost up to 20psi and the car put out 388 rwhp and 421 torque . This was just a tad too much boost and the car was running dangerously lean so I backed it back down to 17psi and the car made 360 rwhp and I think right at 390 torque. This was fairly safe but again, it was on 110 octane. Keep in mind this is on stock electonics with the "flapper door" AFM and all that good stuff and also with a stock 150k mile shortblock and stock cam. Took the car to dragstrip tonight and ripped the driver side half shaft in-to on the first launch. This is after breaking the front u-joint 2 weeks ago on launch as well . I have a 8.8 rear end from a mustang sitting here so I'm going to see about putting it in tomorrow so I guess I'll probably be selling my 18" wheels, 3.70 LSD, and rear coilovers. Does anyone have any good pics of a 4 link setup in a z? JT Quote Link to comment Share on other sites More sharing options...
Ivan280zt Posted October 16, 2002 Share Posted October 16, 2002 what 388 to the ground on stock electronics. yeah whatever buddy how much are you spraying . i have to see that to belive it. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted October 16, 2002 Share Posted October 16, 2002 This is a very confusing post...first you say you are using an SDS, then stock electronics with a flapper??? I believe the two units are mutually exclusive. If you were running too lean at 20 psi, it seems to me you need to richen it up at that map setting, and reducing the boost will not fix your rich condition. In order to make that kind of power on a stock motor at 17 psi I think you are still running dangerously lean. As for tearing up your halfshafts, there are many folks who can run with more power and not break them - what are you running in the 60'? You will certainly find buyers for your drivetrain parts here, and plenty of support for a 4 link setup, but it sounds like a lot of work and expense that may not be necessary...have you considered replacing the halfshafts with the CV jointed halfshafts? You can retain your rear end and suspension - Scottie GNZ ran 11s with a CV jointed R200 independent rear end. Quote Link to comment Share on other sites More sharing options...
z ya Posted October 16, 2002 Share Posted October 16, 2002 How low is your car? It seems like all of the cars lowered more than an inch or so have a bad time with halfshaft breakage. Quote Link to comment Share on other sites More sharing options...
randy 77zt Posted October 16, 2002 Share Posted October 16, 2002 if you have coil overs set the car up so shafts will be straight under load.my car is lowered and half shafts run up to the wheels. Quote Link to comment Share on other sites More sharing options...
Ivan280zt Posted October 16, 2002 Share Posted October 16, 2002 sleeperz i think what he is trying to say is that he wants to see how much is his car making now before he puts sds on it. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted October 16, 2002 Share Posted October 16, 2002 Originally posted by Ivan280zt:sleeperz i think what he is trying to say is that he wants to see how much is his car making now before he puts sds on it. Oh ho, yes I see. Well, no wonder it was running so lean at 20 psi - the air flap was completely maxxed out - worthless POS anyway... You might not get dyno gains at your previous boost pressures, but tuned right, you will get reliability. Quote Link to comment Share on other sites More sharing options...
240Z Turbo Posted October 16, 2002 Share Posted October 16, 2002 That is Walker's old car and I saw the dyno sheets, all 30 of them, from when Walker owned and dynoed the car. He was making in the 370 RWHP range with 17psi. So, I do not think it is unbelievable that the setup is still making the same power as before. Quote Link to comment Share on other sites More sharing options...
Lockjaw Posted October 16, 2002 Share Posted October 16, 2002 U joints suck. Numbers are nice. I would put the CV axles in there for now. No sense tearing everything out to put in the 4 link. Can I have dibs on the diff? Quote Link to comment Share on other sites More sharing options...
SHANE Posted October 16, 2002 Share Posted October 16, 2002 very nice!!! i too am interested in a 4 link set up on a Z Quote Link to comment Share on other sites More sharing options...
J Taylor Posted October 16, 2002 Author Share Posted October 16, 2002 Walker was either making 358 or 362....I'm wondering if that was on pumpgas b/c the best I got out of it on pumpgas was 339 but that was with stock throttle body. I mainly wanted to see yesterday what the car would do at the same boost level but with the 60mm throttle body and ported head. To keep the same boost level now it HAD to have race gas. So I basically picked up 21rwhp from the headwork and throttle body if you don't count having race gas. Can't figure out how the hell Walker made so much power unless he was running some good octane as well. I have a pair of CV's in a parts car as well but it seems like from what I've read it's kind of a pain to put in and you have to buy adapters and all that crap. Is it easier than I'm thinking? If I go with the 8.8 it probably won't cost much of anything after I sell all my old parts and I wouldn't worry abit about leaving as hard as I want and breaking **** unless it's the transmission....again. I'm rough on drivetrain parts. JT Quote Link to comment Share on other sites More sharing options...
Lockjaw Posted October 16, 2002 Share Posted October 16, 2002 That is one think I like about the 280ZxT. The diff is in there, and I have done some very brutal burnouts on drag ta's at the strip with no problems. I got some wheel hop one time that was so bad, it broke the rearview mirror. One thing I think that would help you is to build one of those diff things that replaces the strap back there. I hate that strap, and was always breaking diff mounts when I had my 240. I used a chain for a while, and that helped, but that is pretty ghetto these days. I am not sure about Walkers numbers to be truthful. I never saw any sheets or anything like that, and my understanding from talking with people was he used to "factor" his rear wheel numbers to flywheel since that was a higher number. I don't want to flame people or get people in trouble for perhaps saying something that they shouldn't have, but I feel certain he had some race gas in the tank. If not for any other reason than safety. Also, all of the info I have was prior to the turbo with the 60-1 compressor, or what ever he put in it. He had enough turbo to do the numbers he said though, I will say that much. Walker did tell me last time I saw him up at steele that he picked up alot of power on the dyno by enlarging his intercooler lines, I assume from when he added the larger intoercooler. He said I needed to do that with mine, so I am going to try it since I have to now with this big intercooler James sold me. Put the SDS in there and bigger injectors and see what happens. Be time for a shortblock pretty soon. Quote Link to comment Share on other sites More sharing options...
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