Opinions/Info on '88 305 TPI motor - Team Camaro Tech
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post #1 of 6 (permalink) Old Mar 11th, 10, 02:48 AM Thread Starter
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Bruce
 
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Opinions/Info on '88 305 TPI motor

I have this 305 that I pulled out of an '88 IROC with 58k miles on it. It is a stock TPI motor and was wondering about some opinions on what is in this from the factory.

I want to put it in my '87 Choo Choo el Camino and want it peppy but over bearig otherwise I have a 406 for that.

The numbers on it are:

block casting is 14093627 dated E258
head castings are 14101081 dated E148
Intake casting is 10086016
crank casting is 14088526

no numbers on the cam but is a roller.

I broke down the motor last weekend and an looking for a nice rebuild kit (rings, rod & main bearings, gasket set, timing set, cam, and roller lifters).

Don't want to build it up much but was wondering about the Corvette aluminum heads for this. I have come across some 14101128 castings heads. Anyone have any info on these?

Bruce

'68 el Camino SS 396/325 hp, 4 Spd, 3.31, Buckets, AC
'72 el Camino SS, 454 LS5, 4 Spd, 3.73 LSD, Buckets, AC
'75 el Camino SS, 400 SB, Turbo 350, AC, Swivel Buckets, PW, PDL
'87 el Camino Choo Choo SS (305 TPI, 200R4, 3.73 LSD)
'87 Buick GN Hardtop
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post #2 of 6 (permalink) Old Mar 11th, 10, 04:55 AM
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Re: Opinions/Info on '88 305 TPI motor

sounds like a nice engine to build for the camino

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post #3 of 6 (permalink) Old Mar 21st, 10, 03:36 AM Thread Starter
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Bruce
 
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Re: Opinions/Info on '88 305 TPI motor

OK, anyone out there ready to help me find the right set of heads for this motor?

Seems like the stock 305 casting #14101081's have 1.84 intake with 1.50 exhaust valves but I still have no idea of the size of the chamber (maybe 58cc??). These are the 305 TPI setups. The 350 ones with casting 14101083 have 1.94 intake and 1.50 exhaust and still no idea of chamber.

My ideal setup for this motor would be the 14101083's but I want to make sure they have the same size chamber so I don't make any changes to the compression.

I have come across a set of '96 Vette LT1 heads (casting number 102070643). I don't seem to be able to find any info on them. Will these bolt up to the MAF TPI intake? Also would like to confirm valve and chamber sizes.

Bruce

'68 el Camino SS 396/325 hp, 4 Spd, 3.31, Buckets, AC
'72 el Camino SS, 454 LS5, 4 Spd, 3.73 LSD, Buckets, AC
'75 el Camino SS, 400 SB, Turbo 350, AC, Swivel Buckets, PW, PDL
'87 el Camino Choo Choo SS (305 TPI, 200R4, 3.73 LSD)
'87 Buick GN Hardtop
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post #4 of 6 (permalink) Old Mar 21st, 10, 04:51 AM
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Re: Opinions/Info on '88 305 TPI motor

The lT1 heads will not work, no water in intake.
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post #5 of 6 (permalink) Old Mar 23rd, 10, 06:14 PM Thread Starter
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Bruce
 
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Re: Opinions/Info on '88 305 TPI motor

OK, I think I found the right heads for this setup. They are the Corvette L98 aluminum stock heads. The same size chamber (58cc), same size exhaust and the intake are 1.94" versus the stock 305 TPI being 1.84".

Any comments I should consider on these as this is the first time I am getting myself into a project with aluminium heads?

Here is the link to the ones I am considering:

http://cnj.craigslist.org/pts/1654667689.html

These are brand new so no work to do. Do I need guide plates? Any suggestions on rockers? Stock? roller?

Bruce

'68 el Camino SS 396/325 hp, 4 Spd, 3.31, Buckets, AC
'72 el Camino SS, 454 LS5, 4 Spd, 3.73 LSD, Buckets, AC
'75 el Camino SS, 400 SB, Turbo 350, AC, Swivel Buckets, PW, PDL
'87 el Camino Choo Choo SS (305 TPI, 200R4, 3.73 LSD)
'87 Buick GN Hardtop
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post #6 of 6 (permalink) Old Mar 23rd, 10, 07:31 PM
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Re: Opinions/Info on '88 305 TPI motor

Cylinder diameter dictates intake valve size. The reason 305's have smaller valves, valve is less shrouded by the cylinder diameter, better air flow, than a larger valve and the larger valve may hit the cylinder wall.

Since the engine is torn apart, borrow a bigger valve head and bolt it on, gasket not needed, and view through the bottom for clearance. Do the same with the smaller head.

Having roller lifters saves the budget as all you need is a new camshaft and you can use the OE lifters on the new cam - no wear problems.

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