nissan720 Posted July 16, 2017 Report Share Posted July 16, 2017 in process of doing engine swap in my 720 .got engine out of 1994 hardbody .i have completely rebuilt the engine.who make a decent manifold from this engine.i know Dorman makes one,but everyone the local parts house has ordered for me is crap.its made with what seems to be no quality control at all.i want to know if i can use a pacesetter part number 70-1193 in my 720.every stock one i have found has cracks around oxygen sensor thats why i want to go with a header.company called ATP offers one ,but everyone who sells them are always out of stock with no back order date.need this resolved ready to put my 720 back on the road! i have a thorley header but it has square ports made for the z24.so can't use that. by the way that 70-1193 is made for thw hardbody.don't know about fit especially the chassis Quote Link to comment
datzenmike Posted July 16, 2017 Report Share Posted July 16, 2017 Your 720 does not have the same engine as the '94 Hardbody, so cracks around the O2 sensor is meaningless. Surely this '94 has an exhaust manifold... use it. Free, fits, never wears out, quiet, makes same power. Did I mention it fits? Punctuate your run on sentence. 2 Quote Link to comment
nissan720 Posted July 16, 2017 Author Report Share Posted July 16, 2017 upon further investigation,its cracked in more than one place.So its got to go.Not a big fan of cracked up manifolds.Question is ,will the header built for a 1994 nissan hardbody fit the 720 ?Has anyone tried this ? Quote Link to comment
bottomwatcher Posted July 16, 2017 Report Share Posted July 16, 2017 If this is a ka swap read the swap write ups. The exhuast will need some modification anyways to clear the frame. Quote Link to comment
nissan720 Posted July 16, 2017 Author Report Share Posted July 16, 2017 thanks,just wanted to know of anyone here had done that already.I may have a lead on a good used stock one.local guy scrapped a 1992 model.Going to look at it today.I am not a really big fan of header.Just would rather keep it close to stock.If I have to I will get the aftermarket manifold and take the grinder to it and clean up the rough spots.I like the stock manifold because of less problems with leaking header gaskets. 1 Quote Link to comment
Stoffregen Motorsports Posted July 16, 2017 Report Share Posted July 16, 2017 Me too. Headers are prone to leaks. There are ways to ensure that headers last a long time. Things like thick flanges, a good metal gasket, fasteners that are in perfect shape, good collector flange, good heat coating or stainless tubing. Those all add up to a leak free system. Quote Link to comment
nissan720 Posted July 16, 2017 Author Report Share Posted July 16, 2017 thanks,i have had my experience with the pacesetter brand.I don't want anymore of those! Quote Link to comment
datzenmike Posted July 16, 2017 Report Share Posted July 16, 2017 Try a ceramic coated one or have a cheap one done. This will probably double the life to over 5 years. I wouldn't waste my time or money on a header, (done that before) the stock exhaust is good enough. Spend the money saved on a 1/4" larger diameter pipe, get rid of cat and put a larger muffler on. A header is 99.99% of the time just along for the ride and always becomes a pain in the ass. Always. Quote Link to comment
Copper86 Posted July 17, 2017 Report Share Posted July 17, 2017 Would you be interested in selling the thorley header? I'm in Richmond VA, so shipping wouldn't be too much Quote Link to comment
nissan720 Posted July 18, 2017 Author Report Share Posted July 18, 2017 I am with you on that one datzenmike.I am using stock manifold .Using 1/4 larger pipe,magnaflow stainless muffler .I agree this truck is for riding. Quote Link to comment
datzenmike Posted July 18, 2017 Report Share Posted July 18, 2017 If you have a 2" exhaust and you increase the diameter by only 1/4" you increase the cross sectional area by 26% This would indicate that if you have a 2.4 liter displacement engine your pipe would work on a 3 liter engine. Why people go to 3" or w/e is beyond me. Quote Link to comment
nissan720 Posted July 18, 2017 Author Report Share Posted July 18, 2017 i will be running 2 1/4 pipe from the manifold into a single inlet dual outlet muffler. Copper 86 sent you a PM Quote Link to comment
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.