Help!!!

thomas · 07-08-2007, 04:58 PM

i just did a top-end overhaul on my 87 r10 305 tubro 400 trans. its got new heads, intake manifold, cam, lifters(etc), torque converter, and headers.
now, it runs like ****. it tops out at 45 mph.

can anyone tell me anything about ANYTHING?
right now i feel stupid because it wont work

Sneakysportsman · 07-08-2007, 05:32 PM

You could have your cam timing off, lifters too tight, spark timing not set right, It may even be something even simpler. I have a 95 1/2 ton 4X4 with a built 350, It has less than 1000 miles and have torn it down- apart removed abut 3 times changed the cam 3 times and my whole prob was the wrong valve springs. Now its right with 406hp@ crank and 412ftlbs torque and still runs ALL accessories and the factory computer. Just be patient, sometimes it pays off more than you think.

thomas · 07-08-2007, 07:03 PM

i dont have my exhaust on yet either. we finished the rebuild this morning so i havnt had time to take it to a muffler shop to get my exhaust put on. my oxygen sensor is at the end of my new longtube headers, could a problem be that the sensor isnt getting hot enough and screwing up the computer? i was also thinking that since the computer is set for the old stuff, because its an 87, and i put in these performance parts, that it would run poorly without a new chip?

07-08-2007, 04:58 PM	#1
thomas Junior Member Join Date: Jul 2007 Posts: 6	Help!!! i just did a top-end overhaul on my 87 r10 305 tubro 400 trans. its got new heads, intake manifold, cam, lifters(etc), torque converter, and headers. now, it runs like ****. it tops out at 45 mph. can anyone tell me anything about ANYTHING? right now i feel stupid because it wont work

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

07-08-2007, 05:32 PM	#2
Sneakysportsman Senior Member Join Date: Jun 2007 Posts: 233	You could have your cam timing off, lifters too tight, spark timing not set right, It may even be something even simpler. I have a 95 1/2 ton 4X4 with a built 350, It has less than 1000 miles and have torn it down- apart removed abut 3 times changed the cam 3 times and my whole prob was the wrong valve springs. Now its right with 406hp@ crank and 412ftlbs torque and still runs ALL accessories and the factory computer. Just be patient, sometimes it pays off more than you think.

07-08-2007, 07:03 PM	#3
thomas Junior Member Join Date: Jul 2007 Posts: 6	i dont have my exhaust on yet either. we finished the rebuild this morning so i havnt had time to take it to a muffler shop to get my exhaust put on. my oxygen sensor is at the end of my new longtube headers, could a problem be that the sensor isnt getting hot enough and screwing up the computer? i was also thinking that since the computer is set for the old stuff, because its an 87, and i put in these performance parts, that it would run poorly without a new chip?