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HP EFI CNP upgrade
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Paul P
Member


Joined: 15 Aug 2002
Posts: 2351
Location: Townsend, Mass.
79688.04 points


1971 Chevrolet Chevelle

PostPosted: Wed Apr 12, 2017 4:01 pm    Post subject: Reply with quote

Done with under the hood for the most part. Sold the Jacobs Nitrous Mastermind and installed the Holley progressive SS relay so that the HP EFI system can control the Nitrous too. I did also upgrade to a 200Amp alternator to keep the coils happy.


_________________
2001 Focus 2.0 Zetec
15.63@87 MPH 1/4mi
1971 - Chevelle 408 SBC N.A.
6.95@98.6 MPH 1/8mi
10.97@121 MPH 1/4mi
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10sec.et
Member


Joined: 29 Mar 2006
Posts: 3433
Location: Houston,Texas
345276.58 points


1969 Oldsmobile Cutlass

PostPosted: Thu Apr 13, 2017 12:07 am    Post subject: Reply with quote

VERY NICE!!! i like the way you did the coils. we just did a 63 Impala and put the coils down behind the wheel well. that was no fun at all. out of sight but miserable to put wires on.
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af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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Paul P
Member


Joined: 15 Aug 2002
Posts: 2351
Location: Townsend, Mass.
79688.04 points


1971 Chevrolet Chevelle

PostPosted: Thu Apr 13, 2017 7:38 am    Post subject: Reply with quote

Yeah I didn't have to cut a single plug wire. 1 and 3 are swapped because of length but you would never know really unless you look closely. I finished up under the dash last night and loaded the new global file that i built for this setup. It fired right up first crank and runs pretty good the 200 Amp alternator maintains 14.5V at an idle Exclamation . I don't have much fuel in it so I only ran it for a few minutes but it lives. Burn Out
_________________
2001 Focus 2.0 Zetec
15.63@87 MPH 1/4mi
1971 - Chevelle 408 SBC N.A.
6.95@98.6 MPH 1/8mi
10.97@121 MPH 1/4mi
Back to top
View user's profile Send private message
10sec.et
Member


Joined: 29 Mar 2006
Posts: 3433
Location: Houston,Texas
345276.58 points


1969 Oldsmobile Cutlass

PostPosted: Sat Apr 15, 2017 12:55 am    Post subject: Reply with quote

thats great! that system definitely needs the voltage. weird stuff happens at 12 and below. ive had pure hell with 1 wire alternators and low voltage at idle. glad its running . now for some WOT tuning Cool
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af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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Paul P
Member


Joined: 15 Aug 2002
Posts: 2351
Location: Townsend, Mass.
79688.04 points


1971 Chevrolet Chevelle

PostPosted: Mon Apr 17, 2017 9:17 am    Post subject: Reply with quote

Thanks Keith. I had to make a new upper bracket for the alternator due to the case having a square boss just to the right of the bolt hole. It looks kind of weird with the angle in it but it gets the job done. Not sure if I will put any holes in it due to the stress that will be on it. If it was a straight push it would be ok but not with the bend there. Still have to get some fuel and fix my hood that I cracked leaving the pins out DOOH!
_________________
2001 Focus 2.0 Zetec
15.63@87 MPH 1/4mi
1971 - Chevelle 408 SBC N.A.
6.95@98.6 MPH 1/8mi
10.97@121 MPH 1/4mi
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af2
Member


Joined: 01 Sep 2003
Posts: 5545
Location: grassvalley, ca
70832.50 points


1933 Willys Coupe

PostPosted: Wed Apr 19, 2017 8:27 pm    Post subject: Reply with quote

Paul, That is very nice clean work!!
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Paul P
Member


Joined: 15 Aug 2002
Posts: 2351
Location: Townsend, Mass.
79688.04 points


1971 Chevrolet Chevelle

PostPosted: Thu Apr 20, 2017 8:22 am    Post subject: Reply with quote

Thanks Adam. I did cut all the original wires out of the original harness that ran across the firewall from the fuse panel to the passenger side to clean it up. These were for the charcoal box emissions solenoids, old resistor wire for the points and who knows what else. Still hard to get it all tucked behind the coil racks. Hope I don't have any EMI noise issues now that it is all tucked away. It would suck to have to move the harness that feeds the coils.
_________________
2001 Focus 2.0 Zetec
15.63@87 MPH 1/4mi
1971 - Chevelle 408 SBC N.A.
6.95@98.6 MPH 1/8mi
10.97@121 MPH 1/4mi
Back to top
View user's profile Send private message
10sec.et
Member


Joined: 29 Mar 2006
Posts: 3433
Location: Houston,Texas
345276.58 points


1969 Oldsmobile Cutlass

PostPosted: Wed Apr 26, 2017 12:33 am    Post subject: Reply with quote

very nice work Paul! Cool Cool Cool

i love that Holley setup. the Dominator EFI is our choice at work. transplants with factory ECUs are a headache. so many weird issues. the Holley system solves nearly all of that. they have the V4 software out now. it does a bit more. still some areas for improvement but , IMO, the best system on the market.

_________________
af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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View user's profile Send private message
Paul P
Member


Joined: 15 Aug 2002
Posts: 2351
Location: Townsend, Mass.
79688.04 points


1971 Chevrolet Chevelle

PostPosted: Wed Apr 26, 2017 5:29 am    Post subject: Reply with quote

Thanks Keith. That Dominator ECU is nice but a bit pricey. Maybe some day I will upgrade but for the money I would really only get the second O2 sensor output. If I went with twins it would certainly something to consider.
_________________
2001 Focus 2.0 Zetec
15.63@87 MPH 1/4mi
1971 - Chevelle 408 SBC N.A.
6.95@98.6 MPH 1/8mi
10.97@121 MPH 1/4mi
Back to top
View user's profile Send private message
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