What have you done to your truck today?
EFI 460 Valve tip height PLEASE HELP
Hi Guys
I havent posted very often on this forum but i do read quite often
I have a problem with my EFI 460 just had engine block machine and deck .20 thou and heads reconditioned with new larger valves problem i have now is when i install the roller rocker the rocker tips are on the outside edge of the valve and when heads where being reconditioned the engine builder told me i would need longer push rods but for me to get the roller tip anywhere near the center of the valve i need about 4mm or .160 thou shorter push rods engine builder tells me he is not sure what the problem is I have read on many forums Comp Cams and Yella terra etc that valve tip height needs to be maintained to factory height when installing larger valves problem is now i dont know what the standard valve tip height is.
If possible i would like to know the height from the valve spring seat to the tip of the valve stem.
I know the new valve springs are about .100 thou longer than the ones Comp cams suppied me with the Cam as the engine builder told me my springs were about a .100 thou to short so he had to get different ones my problem is I need to take this problem back to him to fix but I need to know what the standard height should be so i have datum piont to work from to get mt rocker geometry correct.
thank you for any help you can give on this matter.
regards Adam
I havent posted very often on this forum but i do read quite often
I have a problem with my EFI 460 just had engine block machine and deck .20 thou and heads reconditioned with new larger valves problem i have now is when i install the roller rocker the rocker tips are on the outside edge of the valve and when heads where being reconditioned the engine builder told me i would need longer push rods but for me to get the roller tip anywhere near the center of the valve i need about 4mm or .160 thou shorter push rods engine builder tells me he is not sure what the problem is I have read on many forums Comp Cams and Yella terra etc that valve tip height needs to be maintained to factory height when installing larger valves problem is now i dont know what the standard valve tip height is.
If possible i would like to know the height from the valve spring seat to the tip of the valve stem.
I know the new valve springs are about .100 thou longer than the ones Comp cams suppied me with the Cam as the engine builder told me my springs were about a .100 thou to short so he had to get different ones my problem is I need to take this problem back to him to fix but I need to know what the standard height should be so i have datum piont to work from to get mt rocker geometry correct.
thank you for any help you can give on this matter.
regards Adam
After spending the daylight hours after work this week clearing the couple feet of snow off of the roof of the house, I figured I'd take advantage of the melt and clean all of the snow off of the truck (and out of the bed).
Afterwards, I made this to remind myself that spring is almost here.
Afterwards, I made this to remind myself that spring is almost here.
Skufox10, that is a sweet looking truck! I worked on my 91 F150 today- I managed to get the transmission oil cooler hooked up to my new radiator by removing the old fittings from my old leaky radiator and installing on the new one- all is well again and no coolant leaks! Next job to replace the rear U joint. Maybe tomorrow!
Guess it was a couple days ago now, but towed my first trailer of any substantial weight at altitude. Towed 5k down at 800' many times, but even 2500 or 3000lbs at 7000' with a nasty headwind is a whole different ball game. 2nd gear at 55mph just feels wrong..she actually pulled harder if I backed way off the throttle and let it down shift to 3rd then got back on it. Probably got about 8mpg. Stock 351 kind of falls on its face over 3000rpm at any altitude. Then on the return trip with a tail wind/no wind it was like the trailer wasn't there, 70mph in OD with ~12mpg.
Also got to try out my front hitch for positioning trailers into tight spots, man are those slick! Should have made one of those years ago.
Also got to try out my front hitch for positioning trailers into tight spots, man are those slick! Should have made one of those years ago.
Join Date: Mar 2011
Location: Backwoods of Snowflake AZ
Posts: 10,080
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Join Date: Mar 2011
Location: Backwoods of Snowflake AZ
Posts: 10,080
Likes: 0
Received 2 Likes
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2 Posts
Just calculated the fuel mileage on the 89 F250: 10 MPG to and from town mostly highway.
Specs: 89 F250 4x4 351W reg cab long bed heavy flatbed 4.10 gears Zf5 transmission.
Sounds kinda low to me what do you guys think? Maybe up shifting and downshifting on the backroads is what killed it (5 miles backroads each way).
Trav
Specs: 89 F250 4x4 351W reg cab long bed heavy flatbed 4.10 gears Zf5 transmission.
Sounds kinda low to me what do you guys think? Maybe up shifting and downshifting on the backroads is what killed it (5 miles backroads each way).
Trav
Just calculated the fuel mileage on the 89 F250: 10 MPG to and from town mostly highway.
Specs: 89 F250 4x4 351W reg cab long bed heavy flatbed 4.10 gears Zf5 transmission.
Sounds kinda low to me what do you guys think? Maybe up shifting and downshifting on the backroads is what killed it (5 miles backroads each way).
Trav
Specs: 89 F250 4x4 351W reg cab long bed heavy flatbed 4.10 gears Zf5 transmission.
Sounds kinda low to me what do you guys think? Maybe up shifting and downshifting on the backroads is what killed it (5 miles backroads each way).
Trav
Installed new fuel pumps (in tank) in the 89 F250 so now gas gauge and stalling problem are all fixed. $200 for two in tank fuel pumps that's the price of my 02 F250s fuel pump in tank and it is high pressure one fuel pump. At least the 89 is treating us well (knock on wood).
Trav
Trav