[Gmecm] High CR TBI

[Programmer]

I know what you're saying.
I did a higher CR, combo with a Crane 108deg separation in a little shortbox 
chevy around 5 years ago that still runs with the stock mustangs at the 
track...and it was a little tricky to get a nice idle out of that one.
Engine was 10.25, stock heads with ported exhaust--1.96/1.60 Manley 
stainless with Z28 valve springs and Comp retainers. We didn't even run 
headers with that one, and it'll run a 15.3@ 89-90MPH with stock 
injectors...not fantastic...but it was a cheap buildup, and still took 3 
full seconds off the factory E.T. (Our track is at 2600ft)...

Nothing is impossible...improbable, more likely !

Lyndon.

----- Original Message ----- 
From: "Chris Reynolds" <red83brick at yahoo.com>
To: <gmecm at diy-efi.org>
Sent: Friday, August 04, 2006 7:33 PM
Subject: Re: [Gmecm] High CR TBI


>I know what you mean.
>
>  I have sucessfully tuned a very large cam in my 312 TBI.  230/236* @ 
> .050, roller cam with 1.6:1 rockers (Extreme EFI).   Carcraft claims that 
> anything over 206* intake duration @ .050 is IMPOSSIBLE with TBI.   I 
> laughed when that article came out and my 305 TBI was running a L-82 
> knock-off cam (224/224 @ .050) with 1.6:1 rockers.
>
>  Here is the idle.
>
>  http://www.youtube.com/watch?v=6XLXwAXkDHo
>
>  My virtually stock internal HD 350 TBI will get up and go for pulling 
> around 5,500 lbs of G-series Van.
>
>  Here is a 65-90 MPH run @ 3/4 throttle getting onto the highway
>
>  http://www.youtube.com/watch?v=PX5Av4pS1RA
>
>
> Mike V <efi at dyakron.com> wrote:
>  Hi Lyndon,
> by 'mistake' you're referring to people going too wild on the overlap
> with a MAP system??
> Do you have the specs handy on his cam?
> Cheers,
> MV
>
> At 09:10 AM 8/4/2006 -0600, you wrote:
>
>>We used the edelbrock conv 8 injectors...Holley TBI, and machined the
>>manifold ports to match. Picked a very mild camshaft--often this is the
>>first mistake most people make...
>
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