Blade

After reading Kevin91Z's post about running his ZZ4 based engine with a 305 5 speed chip and getting good results I decided to give a try myself. Went to the one and only bin archive (hehe), downloaded the 91Z305T5 bin and went to work. Reset the manual/auto flag, left the injector constant at #19 and that's it. The test drive was AWESOME at part throtle. I really like it. I believe the MUCH improved part throtle response is caused by the much more agressive timing map in this bin. The VE tables look about the same. The car runs a little on the rich side (mostly 111BLMs, but 126 at idle) and it's "okay" at full throtle. I still have to play around with the tables for WOT performance but part throtle is muuucho better

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92 Z28 L98 350
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Ported stock heads, XR270HR-10 cam, TES headers, Crane AFPR, Flowmaster catback, MSD ignition components.
Best ET 13.5@105 mph
"Take that auto, drop it in first, hold the brakes, stomp the gas and grin from ear to ear! :-)
Click here to see my car at Truspeed.org

Check out TruSpeed at http://www.truspeed.org
Check out the Bin Archive at http://www.truspeed.org/bins.html

Kevin91Z

iTrader: (1)

Now thats interesting, because I've run my car with both a 305 5-speed chip and a 350 automatic chip, and I dont feel any difference in the way the car acts.

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West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

Blade

Well I sure did. And by looking at the timing tables it should. It looks much more agressive then that of a 350.

[This message has been edited by Blade (edited January 11, 2001).]

88 350 tpi formula

iTrader: (9)

WOW I might just try that tomarrow I happen to have an gm chip for a 305 tpi 5-speed and my car is using a 350 chip with a t-5 in the car. any other mods to the chip? and what was your base timming?

Blade

My base timing is 6. The only thing I did was copy the WOT AFR ratio tables over from the 350 chip and the 90-100kpa VE and timing values from the 350 chip also so WOT performance stayed the same (good!). One other thing I noticed is that when I first start up the car (cold or warm) the engine doesnt rev up to like 1200-2000 then settles down to the idle RPPM after 10-15 seconds. When I start it it goes up to the idle RPM right away and stays there. I like that better.

------------------
92 Z28 L98 350
---------------
Ported stock heads, XR270HR-10 cam, TES headers, Crane AFPR, Flowmaster catback, MSD ignition components.
Best ET 13.5@105 mph
"Take that auto, drop it in first, hold the brakes, stomp the gas and grin from ear to ear! :-)
Click here to see my car at Truspeed.org

Check out TruSpeed at http://www.truspeed.org
Check out the Bin Archive at http://www.truspeed.org/bins.html