My 90 740 347V8 Stroker Mods - Page 3 - Volvo Forums - Volvo Enthusiasts Forum


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  #41  
Old 10-12-2014, 02:38 PM
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No cooling issues? I have a 745 with a LT1 with the same diesel radiator, but am always borderline on temps. If I load the car up with people and cargo, the radiator doesn't really cut it. I think I'm going to try to figure out how to fit a Griffin aluminum radiator.
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  #42  
Old 10-12-2014, 08:40 PM
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Quote:
Originally Posted by amccullough View Post
No cooling issues? I have a 745 with a LT1 with the same diesel radiator, but am always borderline on temps. If I load the car up with people and cargo, the radiator doesn't really cut it. I think I'm going to try to figure out how to fit a Griffin aluminum radiator.
The car has now been on the road for 7 years. At the time, I didn't know that Explorer accessory brackets and water pump etc. would gain me a couple of needed inches for the radiator and fan. As it is, I have no room for a larger (thicker) radiator. Up until a year ago, I had no cooling issues ever. Ran it on Texas Motor Speedway, cross country, rush hour traffic in Dallas summer heat with the a/c running...no problems. This last year, occasionally the temp gauge will tweak up a needle's width or so. Time to flush the radiator and, like you, contemplate an alternative radiator.
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  #43  
Old 10-13-2014, 12:34 AM
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Have you considered putting push fans on the opposite side of the radiator? I don't know much about the 740 nose, but if it's similar to the 240 there's tons of room to mount stuff. A push fan and a pull fan would do a lot better than just the pull.
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  #44  
Old 10-13-2014, 10:29 AM
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All 7 series cars came from the factory with pusher fans wired to a radiator sensor. I wired my. Done that way, they seldom kick on until the motor is too hot. I wired mine to a switch and run it with the a/c around town. Going down the highway the fan is an impediment to airflow. While I can't speak for the LT1, my 347 is a hot motor in every sense. At highway speeds in the winter, it runs at 200 at the cylinder heads. Hotter than a stock engine, but certainly not out of the norm for a performance engine. While mine hasn't ever threatened to truly overheat, it's prudent to keep an eye on it and make certain the cooling system is spot on...as I have less margin for error than with a stock motor.
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  #45  
Old 10-13-2014, 12:29 PM
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the 92 740 turbos have the 92+ 940 setup, with a larger radiator, larger 2-speed electric fan, and no mechanical fan at all.
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  #46  
Old 11-11-2014, 12:15 PM
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you may have already covered this,but what is the computer set up on this? I'm wanting to do a 5.0L SBF swap on my 1995 940 but I'm not sure about how it all will work computer wise.
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  #47  
Old 11-11-2014, 12:21 PM
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The ecm is straight out of the box for an automatic 90 Mustang with 5.0. I originally ran one from a manual but the auto version is a bit more flexible apparently.
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  #48  
Old 11-12-2014, 11:26 AM
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Sounds interesting. Is it really that simple?
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  #49  
Old 11-12-2014, 06:58 PM
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From an ecm stand point, yes it is. Still, unlike the 240 with two engine harnesses, the 7 series has all the wiring in one sheath. Headlights, horns etc remain unchanged but the sensor wiring has to be shortened, lengthened, removed, added to and then spliced into the pigtail for the ecm. I was fortunate in that I bought a complete 90 Mustang as a parts car. The only thing, out of all of it that is squirrley is that I still have both the Volvo AND the Ford fuel pump relays operational. Won't run if either fail.
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Old 11-12-2014, 07:04 PM
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i have to say, I think if I was doing a total build like that, I'd consider going with a single intank 850 T5 style fuel pump. these can move enough fuel for low teen MPGs (I've seen my 855T go down as low as 8-10MPG during full throttle high boost acceleration runs), surely that's enough to keep the SBF happy?
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  #51  
Old 11-13-2014, 06:48 AM
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I'm sure it sounds more complicated than it actually is.. OBD 1 computers confuse me on doing custom mods. My sister has a 1994 940 wagon I'm looking to do a swap like this to here in the next year. Just trying to get my head straight on planning..
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  #52  
Old 01-07-2015, 08:12 PM
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Quote:
Originally Posted by Cboyz View Post
I'm sure it sounds more complicated than it actually is.. OBD 1 computers confuse me on doing custom mods. My sister has a 1994 940 wagon I'm looking to do a swap like this to here in the next year. Just trying to get my head straight on planning..
if you're installing a V8, you won't be using any of the Volvo ECU, ICU, rather you'll be using whatever the V8 came with, or a custom system like a megasquirt.
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1990, 240, 300, 740, 744, 90, ac, compressor, converse, engineering, gauge, hp, mods, redblock, stroker, volvo, youtube

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