I have a customer that wants to install a Blue Print engine in his 84 vet. The engine will have 390 hp and 436 tq and will be carbureted. Will I run into any computer problems when I disconnect the computer from the injection? I realize I may have to wire the 700r4 manually but that is easy. I cant remember about the speedo though? The customer has been fighting this injection for years and does not want hear anything about saving it, I tried. How big of a can of worms am I am getting into?
The existing computer controls cooling fans, TCC lock up, ignition curve and fueling. Not that difficult over all.. Just need to plumb the fuel lines properly using a mechanical or electric low pressure pump , get a mechanical dist and use a electric fan controller and hard wire the TCC as you see fit. If it were my car I would retrofit TPI. The 1227730 ECM can run the fans and TCC too. Manual TCC logic sux compared to when the ECM does it.
. The stock TPI setup would be a total mismatch for that engine, so not really a practical solution... one of the tunnel ram port injection based EFI's would work especially well...
. Of course, simple inexpensive TCC lockup/unlock relay kits available... as are temp-controlled fan switches... the 700-R4 wasn't ECM shifted back then... the speedo was still cable operated...
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. The stock TPI setup would be a total mismatch for that engine, so not really a practical solution... one of the tunnel ram port injection based EFI's would work especially well...
I've actually built 4 of the motors in the TPI shoot out article. I can tell you the stealth ram you recommended not the right intake for 390HP 350CI with low buck alu heads and a cam in the 220/224 cam. That short runner large port intake needs 15 to 25 more degrees in the cam, higher compression and higher end larger port heads that flow. On a mild 350 it will make neither torque or power.
TPI or slightly modified TPI is a great choice for the Blue Print 390HP motor with its average alu heads and kind of mild 220/224 cam. The 2nd order harmonics will stuff the cylinders at low RPM and make the most out of them. I've actually built a 350 with a similar roller cam and a mildly ported TPI...yes it was done by 5200 RPM but it made all the torque I wanted getting there.
In a 1984 Corvette with its 2:73 rear end ratio a short runner intake would not be favorable. TPI would be an excellent match.
. Good eye, Vinnie... I missed the capital letters on Blue Print... I was thinking 'blueprinted' engine by a local builder... lots of complaints on those engines... hopefully, fully warranted, though...
. That Weiand Street Ram uses a street tunnel ram base and the runners aren't that short and they're not that big in cross section... it would work fine, even with 2.73 (3.23?) rear end for general street use, although 'long legged'... and, best of all, not be limited to low 4500 or 5200 RPMs max... higher than stock stall converter might be desirable though, if customer wants... the one in my '87 GTA TPI 350 brake stalls way down at 1100 RPMs...
BuzzLOL;2994754
. That Weiand Street Ram uses a street tunnel ram base and the runners aren't that short and they're not that big in cross section... [/QUOTE said:
What are you talking about...? Weiand / HSR runners are 6 inches. Your typical high RPM single plane intake runner 5 to 7 inches. Would you advise using a single plane intake on a mild 350 with a mild 220 @ .050 cam too? It'll work but wont be ideal.
Nothing wrong with the Weiand / HSR. I have one so I know it well but it's coming off my 406 and I'm going back to the Accell Super Ram so I can get some midrange torque back. If I went for a solid roller Cam in the high 230's and hogged out the ports so they could flow then the Weiand HSR would be a better fit.
. Simply put, the Street Ram will work much better than a stock TPI... of course, anything can be fine tuned further if the person is inclined to do so... which the customer of the OP isn't likely to want to do...
. Got any spare SuperRams laying around? ... Since apparently they aren't available new anymore... and the last 'Accell' SuperRams were actually made by Edelbrock... with higher price for the Accell sticker on the box...
. I run a Victor Jr. and Holley 750 on a 351W with a 216/228 cam and perfectly happy with it...
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you can probably just disconnect the tbi and the computer wont know its so basic.
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