Suggestions

[Shannen Durphey]

A stock TPI is generally good for 4500 rpm max power.  If your cam peaks
higher than that, I'd consider a different style intake.  Larger amounts
of valve overlap can make it difficult to tune a speed density system. 
$850 is a very high price for a tpi system.  I'm not so sure you've found
a deal there.
Shannen

William McNett wrote:
> 
> I know this is a ECM list, but.
> Does anyone have any suggestions on an programmable EFI system for a 383
> making a little over 400 hp?
> Drivability is a big plus.
> I'd also like to have the ability to monitor what's happening.
> One guy told me that a speed density sys. would not work with my cam.
> 
> I can get a stock 86-88 TPI sys. off a Vette for $850.
> 
> Thanks,
> Bill
> 
>  http://www.cass.net/~mcnett/william/my383.html
> Cam Specs:
> COMP CAMS 12-242-2
> Advertised duration: 268 intake / 280 exhaust
> Duration at .050 in. cam lift: 224 intake / 230 exhaust
> Gross valve lift: .477 in. intake / .480 in. exhaust
> w/ 1.6 rockers: .509 in. intake /  .512 in. exhaust
> Lobe separation: 110 degrees
> Intake centerline: 106 degrees
> RPM range: 1,600 to 5,800
> 
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