flat tappet in my roller motor
flat tappet in my roller motor
I'm only thinking of this because flat tappet kits are so cheap compared to hydro rollers. The only goal for this build is for sound. I just want the car to sound good for next summer while I build the new motor.
So. I've done a little research and it look like I need the cam, lifters, and longer push rods (.300). I think I may need a new timing cover?
What am I missing?
Thanks guys!
So. I've done a little research and it look like I need the cam, lifters, and longer push rods (.300). I think I may need a new timing cover?
What am I missing?
Thanks guys!
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Joined: Dec 2004
Posts: 16,737
Likes: 994
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: flat tappet in my roller motor
whats wrong with getting a new roller cam and using your old roller lifters? If you want new lifters get them at skip white.
http://www.skipwhiteperformance.com/...px?Item=J-2079
http://www.skipwhiteperformance.com/...px?Item=J-2079
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: flat tappet in my roller motor

By the time you buy all the parts needed for the " cheap" flat tappet swap you could buy a roller cam.
Just take your old cam out and put the new one in using all the parts (free ) you already have.
Used rollers always for sale on here cheap (< $200 ) and with a used roller cam you don't need new lifters
Senior Member
iTrader: (2)
Joined: Apr 2012
Posts: 604
Likes: 1
From: Norwalk, Ohio
Car: 1989 Firebird Formula
Engine: 385
Transmission: Full Manual TH350
Axle/Gears: Moser 9" 3.70
Re: flat tappet in my roller motor
^
Lifters and a flat tappet cam will run you nearly as much as a new roller cam. Not to mention lost power going to flat tappet. Stay roller, all you need is a cam.
Lifters and a flat tappet cam will run you nearly as much as a new roller cam. Not to mention lost power going to flat tappet. Stay roller, all you need is a cam.
Joined: Oct 2001
Posts: 12,214
Likes: 1,140
From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: flat tappet in my roller motor
Another vote to stay roller. Look for a used cam on the cheap if your on a budget (and aren't we all, except the government).
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Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: flat tappet in my roller motor
New they are but roller cams don't wear like flat tappet cams so most used ones are as good as new for half the price
Always for sale in the parts dept
https://www.thirdgen.org/forums/engi...rn-roller.html
https://www.thirdgen.org/forums/engi...ic-roller.html
https://www.thirdgen.org/forums/engi...hydraulic.html
https://www.thirdgen.org/forums/engi...-pushrods.html
Always for sale in the parts dept
https://www.thirdgen.org/forums/engi...rn-roller.html
https://www.thirdgen.org/forums/engi...ic-roller.html
https://www.thirdgen.org/forums/engi...hydraulic.html
https://www.thirdgen.org/forums/engi...-pushrods.html
Senior Member
iTrader: (2)
Joined: Apr 2012
Posts: 604
Likes: 1
From: Norwalk, Ohio
Car: 1989 Firebird Formula
Engine: 385
Transmission: Full Manual TH350
Axle/Gears: Moser 9" 3.70
Re: flat tappet in my roller motor
What sort of "sound" are you looking for from the motor? Like a specific tone, a lope at idle, loud?
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: flat tappet in my roller motor
The sort of sound every newbie on here "WANTS" so they can pretend they have a hot engine ;
a sound that only comes from a cam that doesn't well work with the stock computer tune.
Which is why their 2nd post is
" I put this lumpy cam in for the sound and now my car won't idle , runs like c*ap and has no fuel economy "
a sound that only comes from a cam that doesn't well work with the stock computer tune.
Which is why their 2nd post is

" I put this lumpy cam in for the sound and now my car won't idle , runs like c*ap and has no fuel economy "
Senior Member
iTrader: (2)
Joined: Apr 2012
Posts: 604
Likes: 1
From: Norwalk, Ohio
Car: 1989 Firebird Formula
Engine: 385
Transmission: Full Manual TH350
Axle/Gears: Moser 9" 3.70
Re: flat tappet in my roller motor
The sort of sound every newbie on here "WANTS" so they can pretend they have a hot engine ;
a sound that only comes from a cam that doesn't well work with the stock computer tune.
Which is why their 2nd post is
" I put this lumpy cam in for the sound and now my car won't idle , runs like c*ap and has no fuel economy "
a sound that only comes from a cam that doesn't well work with the stock computer tune.
Which is why their 2nd post is

" I put this lumpy cam in for the sound and now my car won't idle , runs like c*ap and has no fuel economy "
Re: flat tappet in my roller motor
The sort of sound every newbie on here "WANTS" so they can pretend they have a hot engine ;
a sound that only comes from a cam that doesn't well work with the stock computer tune.
Which is why their 2nd post is
" I put this lumpy cam in for the sound and now my car won't idle , runs like c*ap and has no fuel economy "
a sound that only comes from a cam that doesn't well work with the stock computer tune.
Which is why their 2nd post is

" I put this lumpy cam in for the sound and now my car won't idle , runs like c*ap and has no fuel economy "
First, Im not some newbie when it comes to building motors, just a newbie when it comes to the sbc family. Second, I have no intention of pretending its fast. Third, Im just gathering info as I may not even do this.
Going from having a nice throaty sound to a completely stock iroc sucks. I can hear myself fart at WOT. I was just tossing around ideas while I build the lsx setup. The only thing Im going to buy for sure is a 3 inch catback set as that I can reuse with the lsx set up.
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: flat tappet in my roller motor
You stated in your 1st post "The only goal for this build is for sound".
You need to be aware that unlike a carb engine where you can throw almost any cam ( within reason ) in it
and it will run ,
with EFI once the cam specs vary too far from stock ( lumpy ) then you need a custom tune for the computer
If you are doing a future LSX swap I would leave the engine alone and just play with the exhaust ( no mufflers? )
to get the sound you desire
You need to be aware that unlike a carb engine where you can throw almost any cam ( within reason ) in it
and it will run ,
with EFI once the cam specs vary too far from stock ( lumpy ) then you need a custom tune for the computer
If you are doing a future LSX swap I would leave the engine alone and just play with the exhaust ( no mufflers? )
to get the sound you desire
Re: flat tappet in my roller motor
You stated in your 1st post "The only goal for this build is for sound".
You need to be aware that unlike a carb engine where you can throw almost any cam ( within reason ) in it
and it will run ,
with EFI once the cam specs vary too far from stock ( lumpy ) then you need a custom tune for the computer
If you are doing a future LSX swap I would leave the engine alone and just play with the exhaust ( no mufflers? )
to get the sound you desire
You need to be aware that unlike a carb engine where you can throw almost any cam ( within reason ) in it
and it will run ,
with EFI once the cam specs vary too far from stock ( lumpy ) then you need a custom tune for the computer
If you are doing a future LSX swap I would leave the engine alone and just play with the exhaust ( no mufflers? )
to get the sound you desire
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