SBC 283 and 305 With TUNED PORT INJECTION TPI - Hot Rod Forum : Hotrodders Bulletin Board
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Old 07-11-2005, 12:44 AM
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SBC 283 and 305 With TUNED PORT INJECTION TPI

just wondering, if a 1988 tpi setup with mass air flow, that came on a 305, would it run with a 283? If not, what would have to be done for the tpi to accept it? Or will it run without much having to be done?

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Old 07-11-2005, 09:22 AM
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Use the heads off the 305 and it should work fine.
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Old 07-11-2005, 09:33 AM
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Quote:
Originally Posted by boneyard Buick
just wondering, if a 1988 tpi setup with mass air flow, that came on a 305, would it run with a 283? If not, what would have to be done for the tpi to accept it? Or will it run without much having to be done?
Is this the same set up that you were asking about working with a SBC 350 with different cam specs? If it is I suggest that you pick 1 engine base and stick with it. Too many options just makes it hard to decide what way to go.
Besides the TPI was based on the 305-350 engine. If after you bolt the thing on, and for some reason it doesn't work properly, and you don't want to mess with it any more, just install a cam shaft from the 88 IROCK. But just get started.
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Old 07-11-2005, 01:08 PM
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alright i decided not to use the TPI with the 350, i just bought the whole camaro off of my friend with the tuned port injection setup and everything, so the wiring is already done, but now, i got rid of my 350 in trade for the camaro, so the next motor im getting is a 283, and the cam i got is from the 350, 110 LSA, 270 dur. 470 lift. I emailed a TPI specialty shop and they said i'd have to change the camshaft to one that is meant for TPI and not carb. Whats your guys 0.02$ ?
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Old 07-11-2005, 01:12 PM
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Does this 88 IROC run and drive? If so drive it and beat up on it for a while.

Steve
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Old 07-11-2005, 01:14 PM
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nope it doesnt run, i traded my 86 regal for it with a 350 in it for the camaro. The camaro is just nuts though, but doesnt have a motor. Has racing suspension in it, 373 rear end, mint body no rust anywhere on the car, newer iroc rims just mint with brand new bfg 275's on it. and it also has a completely rebuild t5 5 speed in it. And my car had a busted tranny, so im my view i got a kick *** deal, and along with the TPI setup too
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Old 07-11-2005, 01:17 PM
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283 might be kinda fun, although those 3rd gens aren't lightweights by any stretch of the imagination. With a 5 speed and some high revs, you should be able to get it down the road pretty good.

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Old 07-11-2005, 01:19 PM
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oh, btw, that new TPI will not bolt up to the old 283 heads.

K
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Old 07-11-2005, 01:21 PM
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yeha no doubt, think a 283 will be appropriate for a TPI setup? Im pretty excited over this deal i made. I know i lose a cool motor out of it, but this camaro is totally worth it. Just mint with iroc rims, TPI, 5 speed standard, 373 pozi, and mint interior. Its a good deal what do u guys think
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Old 07-11-2005, 01:22 PM
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i have newer style heads that have the new bolt pattern from a 350, they are 194's with 64cc chambers. and i spent a full week porting them.
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Old 07-11-2005, 01:22 PM
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Find a SBC 350 and go from there. Much easier to build a engine that was designed with that fuel induction. Maybe a LT1 would be fun in the Camaro.

Steve
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Old 07-11-2005, 01:24 PM
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a properly done out 283 will rev high and have plenty of horsepower. My buddy has one and it does 12 seconds in the quarter. And another one of my buddies made a chevy 302 and i havent seen much people beat that motor. 283's rev high, and im rebuilding this one, new bearings etc.. before i use it.
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Old 07-11-2005, 01:28 PM
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I do know that about the 283's, but if you are using the TPI set up, that is why I suggest the SBC 350. Also 12 seconds in the quarter is not all that fast, some factory cars are running those #'s

Steve
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Old 07-11-2005, 01:28 PM
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a bunch of porting on those heads and a heavy car may give you problems. The TPI is really not going to flow very well past 5000, and your motor is going to want to breathe with those ported heads well into the 6000 range (although I'm a little skeptical about the 1.94 valves). You may be running into combo issues here-

K
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Old 07-11-2005, 01:49 PM
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If you want to make it work halfway well you should consider some late model 305 heads for the smal chambers. 64cc chambers on a 283 with flat top pistons will be low on compression, around 8.2-1 unless it's zero decked. The you might get 8.5-1. The 58cc chambers would bump the cr a little over 9-1 with thin gaskets and zeor deck height. That would put you in good shape.

Larry
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