[Diy_efi] 8:71 Blown Olds 455 using 749 & $58 code

[md4etal]

fuel burning in the header???  Are you using wide lobe centerline angles on
your cam??? ie 112 or 114 degrees?

Mike D
----- Original Message -----
From: <SBrough2 at aol.com>
To: <diy_efi at diy-efi.org>
Sent: Thursday, December 26, 2002 5:07 AM
Subject: [Diy_efi] 8:71 Blown Olds 455 using 749 & $58 code


> This is a project that we're currently working on.
>
> 455 Olds with a mild cam and dished pistons
> 8:71 Roots style blower with a pair of BBK Throttle bodies on top
> 30# injectors on a plate between the TBs and the blower (kinda like top
hat
> injection)
>
> A picture can be seen a Thirdgen.org board under DIY Prom section "749
Blown
> 455"
> You can also read a little history there a s well.
>
> We've got it running pretty darned good. We have some cold start issues
but
> those shoult be pretty easy to take care of with some enrichment. We have
a
> fairly stable idle even in closed loop. Throttle response has some tip in
lag
> and I have it a little better with TPS enrichment but I've not
concentrated
> on that yet. The current concern is related to observations made while
trying
> to get a decent VE table set up in the 30 to 40 KPA area. This is "in
> neutral" free revving the engine up through the RPM table. At about
2200RPM
> and 35KPA the headers start to glow red. I've had timing all the way from
> about 25 Deg total to about 40Deg total and get the same results. I forced
it
> out of Closed loop and added fuel up to about 800MV O2, and got the same
> results. Anybody ever have this before? What would make the headers got so
> hot?
>
> Thanks
> Steve
>
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> Diy_efi at diy-efi.org
> http://www.diy-efi.org/mailman/listinfo/diy_efi
>

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