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Pontiac - Boost Turbo, supercharged, Nitrous, EFI & other Power Adders discussed here. |
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#21
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I got the IAII block out of the Boss Bird today. So I'm one step closer to my twin turbo Pontiac. First I will be running my 455 HO block with a Luhn YSI setup. I'm probably about a year out on the turbo's. I'm only finishing the heads and wiring the car from the YSI deal.
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#22
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Are you running a turbo 400 trans and have it shifting in auto with 1,000 hp ? At 17# of boost what is your timing set at ? And what is your rpm limit set too?? I have the check valve as well and it doesn't want to shift after 14# of boost going to try to add another check valve soon .i have a 455 with added 4bolt main caps and a 4.250 stroke crank in it , was told to keep it at 5,600 rpms to live ......
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#23
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I have a full manual TH400 in my race car, but have a couple of customers with Auto TH400's and TH350's behind 650-1000hp blown street engines. Have you put a 0.050" restrictor in the vac line before the tee? Just push a short length of ali bar with a 0.050" hole in it into the tube. 27 degrees of timing , rpm is 7000 on my car.
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#24
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Thanks taff2 I don't have a restrictor in line I will try that though thanks for the tip 👍
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#25
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A few posts back someone mentioned with an LS motor you could use a stock (cheap) computer to control fuel injection. Why can't this computer control a Pontiac? I assume there is some sensor or more than one built into a fitting on the LS that is difficult or impossible to fit on the Pontiac? Cam sesnsors and such??
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"Nothing Beats an Ol' Goat." |
#26
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Good question Goatrider I don't think the ls motors have a distributor and they have a crank sensor so not sure if it's possible
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#27
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You would have to run separate systems: Magnetic or optical trigger for say a MSD ignition and the cheap LS computer for the fuel control. No spark capability.
Or you could run the cheap LS computer with a common 62-1 crank sensor and a BOP cam sensor (driving the oil pump) and the LS computer would not know the difference if the engine size was close. It would not work well if you put a 5.3L LS calibration computer on a 400 or 455 engine. If a tune up shop had the right software THEN THEY might be able to modify the LS software for the larger engine but it would be a crude calibration as the ignition maps would not match well with the pontiac engine even if you got the fuel close. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
#28
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I think that a Megasquirt system would be a better alternative, as it can be made to control everything- fuel, timing, boost, water/meth injection. It's very sophisticated and not terribly expensive for what it does.
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Don Keefe, Founding Editor-in-Chief, Poncho Perfection Magazine (October 1, 2015- present) www.ponchoperfection.com Contributing Editor: Collectible Automobile (1999- present) Author: "Grand Prix: Pontiac's Luxury Performance Car" (Released April 27, 2007) "How to Restore Your Pontiac GTO" (Released July 15, 2012) "Pontiac Concept and Show Cars, 1939-1980" (Release Date April, 2016) "Leave the gun, take the cannoli." |
#29
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Quote:
The LS boys usually ditch the stock ECU at some point. Especially running the big cube aftermarket LS varients. Holley also offers a similar EFI package(for more $) and they both have a boat load of features. Forum arguments over which is better are like Ford vs Chevy VS Dodge lol Not hard to stir a hornets nest! |
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