Im lost help

[ibad57]

I have been searching lots of fourms and can't seem to find any info on building a performance 283 i have a 1967 283 im looking to build for my trike and need input on cams heads using TPI from camaro
Just need link or direction to builds including these parts for my Trike

[tjsdelivery]

That's got to be the most classic trike I've ever seen.

[Sweden]

Hi.

That was some really nice trike.:tu

Try this link. http://www.superchevy.com/tech/chevy_engines_drivetrain/builds_product_tests/index.html

[ibad57]

thanks for the feedback!

[r66ss]

I have been searching lots of fourms and can't seem to find any info on building a performance 283 i have a 1967 283 im looking to build for my trike and need input on cams heads using TPI from camaro
Just need link or direction to builds including these parts for my Trike


http://www.hotrodders.com/forum/sbc-283-302-buildup-3567.html


check this link out, kinda interesting?

[mickeywestsr]

Curious about the trike. Any close up pix? What engine & tranny?

[five7kid]

Some basics:

TPI - low-RPM torque system. 4500 RPM max in stock form. Aftermarket runners can raise that.

283 - low displacement, small stroke. Takes RPMs to make power.

Now, this doesn't mean your plan is without merit. But, you can be pretty sure that the '67 283 heads are performance junk, as that was the last year for the 283, and it was only available in 2-bbl form. On the other hand, the heads that the TPI came off of were some of the best production heads the factory ever made. I'll assume you don't have the heads available, though.

Head choices:
Vortec - good heads, but will have 64cc chambers, meaning compression will be low on a 283 without domed pistons. Zero-deck the block & shaved heads with flat-top pistons, and you'll be okay. But, you'll need a Vortec-specific TPI base, about $400 from Edelbrock/GMPP.
Stock factory 305 - 416 and 601 castings are the ones to go with here. 58cc or 53cc, you won't have a problem with compression. They come with 1.84/1.50" valves, 1.94" intakes are easily accomodated, and 1.60" exhaust if you really think you need them. Basic porting really wakes them up. Standard TPI base.
World Products S/R 305 - 1.94/1.50" valves, 58cc chambers. Usually need some port clean-up work as-received. But, overall good heads. Standard TPI base.
Vette/ZZ4 aluminum - 113 castings. 1.94/1.50" valves, 58cc chambers. The CR should be higher with aluminum heads, although you could get by with them as-is. Minor porting required to get them to run with ported 416/601's or ported Worlds. Standard TPI base.

What year is the TPI coming from? 305 or 350? '87-up will have the center two intake mount bolt holes at 72 degrees instead of 90 like the rest. '85-'86 TPI base, or any Vette TPI base, will have all the holes at 90 degrees. '85-'89 are MAF systems, while '90-'92 are speed density (MAP), and are pretty sensitive to displacement changes. All you should need is 19 lb (305) injectors. You should use a 305 knock sensor, although neither the 305 nor 350 is a "perfect" match. The rest of the TPI system was identical whether 305 or 350.

Cam:
Something like a Comp XE258 or XE262 will be about all you'll want with stock TPI. Should be fine in a light trike.

The good news is almost all 283 cranks were forged, but '67 was one of the exception years. As long as the crank is properly prepped, that won't be a problem on a TPI system. ARP rod bolts in stock resized rods will be able to handle this task. Forged pistons are usually worth the extra expense, although they wouldn't be "must-have" in this case.

[ibad57]

Thanks for the input Five7kid This Trike relly should have the 283 engine moter for the period and its a show machine not hot rod so 1/4 mile performance is not pryority
It now has a 267 from 85 malubu engine that I rebuilt useing pic cam and sanderson headers with big pipe and flowmaster-40 with stock half moon 2 barell carb
but one of these components stole the low end tork as its not as stout low end.
The input I get hopefully will make my next build more satisfactory.
I have just purchaced desktop dyno and looking to try parts before spending cash but there is nothing like the input from guys that installed parts and found a great combo. The Tune port is from 85 camaro I belive with aftermarket box and wireing it had new injectors but I havent determined 305 or 350 can't make out any numbers on inj
The following pics are 1 the cam I used in the 267 engine bad profile???
2 the dash of trike with dash moved to center
Thanks to all with input Tim my signature has link to the construction of Old Glory with lots of pic as requested above

[five7kid]

The ECM wasn't the best in the '85 model, but if you've got aftermarket, that's moot, anyway. The '85 base would be the old all 90 degree intake mount bolt angle. That helps avoid issues with head selection.

The 267 was a pretty lame engine. Really not much you can use from it. Although a 283 might be period-correct, TPI certainly isn't. But, I'm no expert on what flies in that department, and what doesn't.

Those cam specs are pretty weird - the SAE duration is way up there, and the .050" duration is pretty tame.

To maintain low end torque, use the stock TPI pieces and keep the cam duration down. I did a little more searching, and it looks like a Comp CS252 would be more like it http://store.summitracing.com/partdetail.asp?part=CCA%2D12%2D388%2D4&autoview=sku

You shouldn't need anything more than stock 305 19 lb injectors.