89-92 351w roller or flat tappet block?
05-14-2008, 07:33 PM
#4
3rd Gear Member
Join Date: Mar 2008
Posts: 755
RE: 89-92 351w roller or flat tappet block?
No such thing as a conversion kit, I hate how they market that crap. You use the dogbones, tray and lifters from a 302 BUT you must use a small base circle cam, which is absolute junk. Just find an F4 block, there everywhere just look
05-14-2008, 08:09 PM
#5
4th Gear Member
Join Date: Feb 2006
Location: South Jersey
Posts: 1,250
RE: 89-92 351w roller or flat tappet block?
ORIGINAL: woodsy
No such thing as a conversion kit, I hate how they market that crap. You use the dogbones, tray and lifters from a 302 BUT you must use a small base circle cam, which is absolute junk. Just find an F4 block, there everywhere just look
No such thing as a conversion kit, I hate how they market that crap. You use the dogbones, tray and lifters from a 302 BUT you must use a small base circle cam, which is absolute junk. Just find an F4 block, there everywhere just look
Ive also heard that the F4 casting started in 92, so if thats true then 92-93 blocks are roller capable. Kind of like what ford did with the 302, it was roller capable for a few years b4 ford started pointing the roller setups in. atleast thats what Ive read in books.
05-14-2008, 08:16 PM
#6
3rd Gear Member
Join Date: Apr 2008
Location:
Posts: 939
RE: 89-92 351w roller or flat tappet block?
ORIGINAL: woodsy
No such thing as a conversion kit, I hate how they market that crap. You use the dogbones, tray and lifters from a 302 BUT you must use a small base circle cam, which is absolute junk. Just find an F4 block, there everywhere just look
No such thing as a conversion kit, I hate how they market that crap. You use the dogbones, tray and lifters from a 302 BUT you must use a small base circle cam, which is absolute junk. Just find an F4 block, there everywhere just look
Yes, 5.0kid, you can easily convert a non-roller to a roller. The only real changes you have to do is drill and tap two small holes in the valley to hold the spider down. And some blocks will need a little grinding at the top of the lifter bores to allow the dog bones to sit flat. Other than that, the installation is the same for every other part.
Don't be afraid to use a roller cam in a non-roller block. With a bigger cam, you'll make more power. With smaller cams, power will be the same. If nothing else, just so you don't have to worry about finding the right oil.
05-14-2008, 09:00 PM
#8
3rd Gear Member
Join Date: Mar 2008
Posts: 755
RE: 89-92 351w roller or flat tappet block?
ORIGINAL: 89Ford
woodsy Im pretty damn sure Comp cams makes lifters specificly for std. base roller cams in a non-roller block. And they are considered conversion or some other word that pretty much means the same thing. And I'm not talking about the link bar style, these lifters do use the lifter but they are specific to non roller blocks, so there is no issue with oil pressure. They are pricey however.
Ive also heard that the F4 casting started in 92, so if thats true then 92-93 blocks are roller capable. Kind of like what ford did with the 302, it was roller capable for a few years b4 ford started pointing the roller setups in. atleast thats what Ive read in books.
ORIGINAL: woodsy
No such thing as a conversion kit, I hate how they market that crap. You use the dogbones, tray and lifters from a 302 BUT you must use a small base circle cam, which is absolute junk. Just find an F4 block, there everywhere just look
No such thing as a conversion kit, I hate how they market that crap. You use the dogbones, tray and lifters from a 302 BUT you must use a small base circle cam, which is absolute junk. Just find an F4 block, there everywhere just look
Ive also heard that the F4 casting started in 92, so if thats true then 92-93 blocks are roller capable. Kind of like what ford did with the 302, it was roller capable for a few years b4 ford started pointing the roller setups in. atleast thats what Ive read in books.
05-14-2008, 09:03 PM
#9
3rd Gear Member
Join Date: Mar 2008
Posts: 755
RE: 89-92 351w roller or flat tappet block?
ORIGINAL: .boB
My "junk" small base circle cam and conversion kit makes 550+hp lap after lap.
Yes, 5.0kid, you can easily convert a non-roller to a roller. The only real changes you have to do is drill and tap two small holes in the valley to hold the spider down. And some blocks will need a little grinding at the top of the lifter bores to allow the dog bones to sit flat. Other than that, the installation is the same for every other part.
Don't be afraid to use a roller cam in a non-roller block. With a bigger cam, you'll make more power. With smaller cams, power will be the same. If nothing else, just so you don't have to worry about finding the right oil.
ORIGINAL: woodsy
No such thing as a conversion kit, I hate how they market that crap. You use the dogbones, tray and lifters from a 302 BUT you must use a small base circle cam, which is absolute junk. Just find an F4 block, there everywhere just look
No such thing as a conversion kit, I hate how they market that crap. You use the dogbones, tray and lifters from a 302 BUT you must use a small base circle cam, which is absolute junk. Just find an F4 block, there everywhere just look
Yes, 5.0kid, you can easily convert a non-roller to a roller. The only real changes you have to do is drill and tap two small holes in the valley to hold the spider down. And some blocks will need a little grinding at the top of the lifter bores to allow the dog bones to sit flat. Other than that, the installation is the same for every other part.
Don't be afraid to use a roller cam in a non-roller block. With a bigger cam, you'll make more power. With smaller cams, power will be the same. If nothing else, just so you don't have to worry about finding the right oil.
05-14-2008, 09:18 PM
#10
2nd Gear Member
Join Date: Oct 2003
Location: Manhattan, Kansas
Posts: 463
RE: 89-92 351w roller or flat tappet block?
Drilling and installing the tray and dogbones in a no roller block is a bad idea. Stock roller lifters will not work properly. The reason is an oiling issue. That is one for the reasons they offer reduced base circle camshafts. With a reduced base circle cam you don't need the tray and dogbones. The only downside to reduced base circle cams is that there aren't alot of off the shelf cams offeredand most aren't very good.The alternative is to use the link bar lifters. They do not make stock style roller lifters for a non roller block. As for castings the F4 stands for "F" 1990's and "4" stangs for 1994 specifically. Roller blocks were only offered from 94-96. They all are F4TE castings. Bigger cams don't always mean big power. If you don't have the rest of the combo to support it, then your just wasting money.
