Performance

1987Elky · Posted: Fri Sep 14, 2007 8:53 am Post subject: Performance

I have an 87 Conquista with the 305-4bbl. It runs good,but I would like more hp.I want to keep the stock engine and all original numbers.What would be the easiest way to make more horses without costing me an arm and leg? Also,it is the 4sp.automatic.Can someone tell me what the transmission is (numerically)? How do I tell what gears I have in the rear end? Thanks.

Mama Mayhem · Posted: Fri Sep 14, 2007 11:54 am Post subject:

Well, before all the 305 haters get started like they do every time someone mentions that they would like to get more out of a 305, I'll tell you that it is possible. The number one thing to do is to improve the breathing. Better flowing heads are number one in my book, followed by better breathing exhaust. You could find a TPI system from a mid 80s to early 90s Vette, Camaro, Impala or Firebird. That system was actually developed for the 305 as GM was thinking of dropping the 350 in favor of the 305, but changed their minds and threw the TPI on the 350 altough it was meant for the 305.

Even I won't recommend spending a great deal of money building a 305 from the ground up, but most anything that you bolt to a 305 will bolt to a 350 or 383 later if you decide to build a real ground-pounder.
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1BadElky · Posted: Fri Sep 14, 2007 4:17 pm Post subject:

There's a thread on building a 305 called "help me build a 305". but they aren't a good performance engine. Dual exhaust and maybe an intake is as far as you'd practically want to go with that engine.

The trans is a TH200-4r, and the rear is likely a 2.41.
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CANTED · Posted: Fri Sep 14, 2007 5:08 pm Post subject: 305

Chevy High Perf magazine has done some work with the 305 that may be helpful- http://www.chevyhiperformance.com/tech/engines_drivetrain/complete_builds/0706ch_small_block_bolt_ons/index.html
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PaPa Johns 77 · Posted: Fri Sep 14, 2007 5:18 pm Post subject:

Had a kid here in town had a stroker 305 came out to somthing like 335 (can't remember so sure) in a full size Chevy Pickup. He was running in the high 14s at the track! Cool

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L K meano biker · Posted: Fri Sep 14, 2007 7:24 pm Post subject: Re: Performance

87ElCamino · Posted: Sat Sep 15, 2007 5:16 am Post subject: Re: Performance

1BadElky · Posted: Sat Sep 15, 2007 8:58 am Post subject: Re: Performance

1987Elky · Posted: Wed Sep 26, 2007 1:08 pm Post subject: Thanks

Thanks to all of you that answered my questions about hopping up the 305,etc. It was a lot of help,to me and probably to others that have this same question.