injector pulse width

[George M. Dailey]

At 03:16 PM 3/27/96, you wrote:
>
>     
>     Hope someone can help,
>     
>     I have put a TPI of a 305 camaro ('84 of memory) onto a 350 block.  
>     The cam is something like a 28/63 (fairly moderate for a mild cam).
>     
>     Does anyone have any idea how much fuel the 305 injectors flow (I 
>     think they are Bosch units) ?
>     
>     and the maximum pulse length required for the 350 using the same 
>     injectors (using the standard 305 fuel rail regulator)?
>     
>     Is it correct the 305 uses a 38PSI regulator, while the 350 uses a 
>     40PSI regulator ?
>     
>     In fact does anyone have a fuel map printout for either a 305 or 350 
>     they could mail me ?  It may make it easier to start setting up the 
>     map.
>       
>     
>     Any help appreciated
>     
>     
>     Dan        dzorde at aesprodata.com.au
============================================================================
============>      Dan, I think TPI started in 1985 and these systems are
different from the '86 and up. Welcome to the TPI club, does your mouth
still water when you look at it?

Per Frank "Choco" Munday's book, TPFI, he states that 305/350 injectors will
work reasonably well if exchanged as a complete set. This refers to the MAF
type TPI systems up to '89, and exclude your '85 baby (even though it's MAF
equiped). His book only covers the '86-'89 models, but I think the injector
swaping rule will apply to your system also since it's a MAF type. Choco
goes on to say that he can not tell the difference below 4,500rpm. Thats big
in small and small in big.
>
>There are differences in the operating pressures. Per chilton, 44psi for
5.0 & 37psi for 5.7

22lbs/hr flow rate for the 350 per Ben Watsons chevy fuel injection book (no
305 data).

BTW guys, The '89 TPI in my '58 is running great! All bugs have been worked
out and I've clocked over 600 trouble free city miles already. The R700 is
comming soon.

Dan, if you can give the symtoms, I sure one of us gurus could help.

Good luck
GMD