hauserdaddy

I have a 280 with a 300HP 350 installed. The previous owner had dual 1 7/8 inch pipes off of the headers and he never finished the exhaust. The pipes are ran up to the floor pans and cutoff. Is that going to be too restrictive? I was thinking I could move up to 2 inch or better duals back into a 2 to 1 Dynomax super turbo in the standard muffler spot on it or go true dual back to two side by side smaller mufflers. So the opinions I would like are is 1 7/8 too restrictive on a 300HP 300 lb torque 350? Will I lose any power going duals int a 2 into 1 muffler? Is it worth running duals all the way back into a 2in 1 out muffler or is 2 into a y pipe into a regular 1 in 1 out muffler the same? Are there any mufflers that would fit side by side in the regular muffler location? Thanks for the help guys! I have been searching the boards for a while and I see a lot of 2 into Y pipe cars and side pipe cars. Not a ton of true duals specific info.

I dont plan on changing a thing because the car seems to run fine. I just wanted opinions on the 305 head because you guys have quite a bit more knowledge than I on this stuff. This head may very well be a High output head. I better start pulling part/casting numbers if I really want to get more info

Thanks Grumpy. Unfortunately, I just dont know how much was done to the head. Obviously it has to have had some work done to it in order for the car to hit 300 HP at the wheels (porting and dished pistons maybe?). I guess I would be increasing performance by going to an aftermarket head but really, how much more am I going to crank out of stock spec 350?

I have a 78 280Z that came from the PO with this setup. 1974 SBC 350, Bottom end is rebuilt to stock specs with less than 2000 miles on her. Top end is a 305 head(500 miles). 477 lift cam, performer intake, new holley 650 carb, Billetproof distributor, TH350 tranny, Quarter stick shifter, New shorty headers, Gear drive timing. Car was Dyno'd at 297 hp and 305 foot pounds of torque to the rear wheels. Why go with a 305 head? I know that they increase compression and should give more low end power but unless they're ported and opened up a bit dont they constrict air flow on a 350? I am not looking to increase HP, I just want to ensure that this engine setup is fine for a Z. Thanks!

I did a search on the wrong forum. Sorry bout that.

answer found.

Thanks for the info guys. I really don't mind doing it by hand, I just wanted to hear opinions on how effective they are and if they save time or not.

I was wondering if you guys have any opinions on the quality of your wax job using a buffer/polisher or doing it by hand? I have always done it by hand but with a very busy schedule, I have less time. Would a polisher cut down on the time? I have a orbital sander that is hook and loop. They make buffers that fit onto it for polishing and waxing. Is this something you would suggest using or would you get a polisher made for polishing cars? Thanks!

Apparently the guy who gave me the parts when I got the car ordered the driveshafts ujoints instead of the half shaft ujoints. He told me they were the halfshaft ones so I answered my own question!

I purchased ujoints from Victoria British (part#62-500) to replace the ones in my 72 240Z. I pulled the half shafts and brought then down to get pressed out and the new ones pressed in. They are telling me that the new ones don't fit. When I line them up in the holes they appear too small to fit as they slide right through loosely? Do I have the wrong parts or is there just more to installing them? Thanks for the help?

While surfing the web I came across this site. Has anyone ever seen one of these in action? Is it a gimmick or actually a useful device? I tried to do a search but found nothing on it. http://www.electricsupercharger.com/

Has anyone ordered wheel cylinders or the hardware spring kits from Courtesy Nissan before? I want to know if the hardware kit for rear drums is complete or if you have to order the springs separate from them? The VB kit has all of the springs. Thanks!

I finally got some time to pull apart the brakes on the rear of my Z. (got it two months ago) Does anyone know where I can purchase the spring hardware kits for the drums for a 72 240? I know I can get the shoes from Courtesy Nissan, but they show the hardware kits are no longer available. I know I need to replace the wheel cylinder on one side (bleeder is broke off) so I might as well do everythng while I have it pulled apart. The shoes look like they got some brake fluid on them as they are corroded as hell. On a second note, I pulled the axles because the ujoints need to be replaced. Would you just bring them in to a shop and get them pressed out and the new ones installed, or would you do it yourself? I have heard they are a pain. Thanks for the help!

Thanks for the info. Is this the correct pertronix part number for the ignitor for a 240z? part number 1761 is what I am coming up with for 70 bucks shipped. I found this write up on installing it. http://www.zhome.com/ZCMnL/tech/ZXPertronix.htm Has anyone used this wiring setup with good results? Thanks, Mike

I am replacing the ujoints on my 72 240Z. Is there anything else I should consider replacing while I have everything pulled apart? I have never done Ujoints so this is a new project for me...