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TPI motors

 
swaluda
V-6 Camaros rule!
Posts: 71
Joined: 11/12
Posted: 05/03/13 05:54 AM

Are these All Roller Cam motors,  Just need to know, Thanks, Stan  

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68scott385
I mow my lawn and find Chevys
Posts: 1994
Joined: 10/09
Posted: 05/03/13 07:48 AM

no  
68scott385 68scott385 68scott385

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swaluda
V-6 Camaros rule!
Posts: 71
Joined: 11/12
Posted: 05/03/13 08:30 AM

Hmmm, Is there a dead give away on ID ing a roller cam motor? If you pop off a valve cover and look for a roller rocker, that should identify one, am i right? Are there specific motor id numbers that one could use for id? Dont Know Scotty, your always there with good advise though. Just trying to get to the bottom of it because im getting ready to commit myself to a build and i HEAR that retrofit stroker kits are a bit more expensive plus whatever else you need to do to the block in order to accept a retrofit kit installation. Just seems easier and less expensive to go with an original roller cam motor. Jeez, what do you think? Thanks Stan  

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Dave632
I mow my lawn and find Chevys
Posts: 2253
Joined: 07/08
Posted: 05/03/13 09:19 AM

I believe roller rockers were only put on the LT4 motors.
I had an LT1 and it did not come with roller rockers, I had to add them, but it did have roller lifters.  
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68scott385
I mow my lawn and find Chevys
Posts: 1994
Joined: 10/09
Posted: 05/03/13 09:48 AM

10243878 305 96-up 2-bolt Vortec Roller
10243880 350 96-up 2 & 4-Bolt Vortec Roller
14011148 350 87-89 2 & 4-Bolt Roller cam one piece seal
14088526 350 87-89 2-bolt Roller cam Passenger stick 1-piece seal

These are the only casting numbers that my reference material specifically calls out as having a roller cam. I know that when GM changed the blocks to include bolt holes for the roller-bone spider retainer they didn't make them all roller motors. A factory roller cam motor doesn't have roller rockers. The only sure way to know is to look in the lifter valley to see if it has the spider spring holding the roller-lifter bone-shaped retainers. If you could get light into the lifter valley without pulling the intake, and then look through the pushrod slots, it would be much easier, and less intrusive to the seller, to determine what you need to know.  
68scott385 68scott385 68scott385

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redneckjoe69
I mow my lawn and find Chevys
Posts: 2337
Joined: 03/10
Posted: 05/03/13 10:19 AM

ive honestly never seen a non-roller cam, T.P.I., motor.   i guess they could have made them.  i know 87 was the first year for f-bodies.    post the casting number on the bellhousing area if you can see/read it.   never seen factory roller rockers on a TPI motor.   they do require self-aligning rockers though in stock form.    im no expert on them but i think later years used a differnent MAF or MAP  sensor?  
  can you tell i only speak carbs fluently?  LOL!  

  you gettin ready to start on this project?  Cool   kinda remember you were out of the states for a bit?  

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swaluda
V-6 Camaros rule!
Posts: 71
Joined: 11/12
Posted: 05/03/13 12:33 PM

Yeah Joe, I was down in Honduras Central America, went there for a weekend 10 years ago and i just got back. House hunting right now. Got my 50 Plymouth tucked in Sis's garage torn down to the bone. Got a guy with a 350 from a 94 Silverado 1500 that runs, i can pick up on the cheap as a rebuild candidate. And so i'm tryin to find out if its set up for a roller cam or if i need to think retrofit kit...Stan  

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68scott385
I mow my lawn and find Chevys
Posts: 1994
Joined: 10/09
Posted: 05/03/13 05:23 PM

trucks got TBI not TPI, there is a huge performance difference  
68scott385 68scott385 68scott385

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redneckjoe69
I mow my lawn and find Chevys
Posts: 2337
Joined: 03/10
Posted: 05/04/13 06:11 AM

+1 Scott.    big difference between throttle body injection and tuned port injection.   ive never saw a tpi motor in a truck from the factory.  

  glad to hear things are going good Stan.   best of luck on the house hunting.  

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zman123
Everything in my driveway’s a Chevy
Posts: 537
Joined: 06/08
Posted: 05/04/13 06:44 AM

That block is made for roller cams but, they usually put flat tappet cams in trucks during those years. No problem though. since the block is a roller block you are in business for whatever cam you want to go with. they did change the front of the cam for those blocks so they could put a cam retainer plate on the front of the block. The front of the cam will have a step in it instead of being flat like the older style small block cams.  

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