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Anonymous
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Well I got a 1985 f150 4x4 and a 1995 efi 300 for the engine. I need to know what is a good tubro to use? I want to run around 20-25 psi, also I'm using megasquirt. Just wanting some input on a good tubro....
What are you planning on doing for a head gasket (not to mention rods and pistons)? At that pressure, you're going to need something way better than anything commercially available.
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StrangeRanger":3kbhc7kj said:
Well thats it I just started this new toy.. I need to know what others have done and whats good to go with. I don't know what to get I.E head, head gasket, crank, pistions, rods, intake.
20 psi is alot to just jump into.....I would start out around 12-15 psi and work your way up form there. I haven't seen too many people build their first turbo motor and start out at 20 psi from the get go. Generally you build a motor and will break a part or find a weak link....then you fix it and add more boost....keep doing this until you run out of money
You want to use this truck as a daily driver and tow vehicle, right? Even 12-15 PSI is a lot of boost for a daily driver; something more on the order of 8-10 would yield huge performance gains without disproportional decreases in reliability. Above that level, it becomes prgressively more and more like juggling hand grenades; 20-25 PSI would be pretty much a race-only engine and could allow as little as 10-12 hours of run time between rebuilds.
If you really want that kind of performance (5-600 BHP) forget about the 300. For that matter forget about a SBF/Windsor as well. The only recent Ford engine that's going to give you that kind of performance in a reliable, streetable package is the 385 series. A moderately built 460 will produce a reliable 500 HP / 500 ft-lbs; a 514 will just as easily make 600.
Frankly, your goals are simply unrealistic. That level of performance with any engine makes a terrible daily driver. You give up way too much drivability and tractability to gain performance that 99% of the time you simply cannot use. If you aim for something in the 300-350 HP/TQ range you will have an excellent tow vehicle and a much more user-friendly piece of transportation. Just my $.02
If you really want that kind of performance (5-600 BHP) forget about the 300. For that matter forget about a SBF/Windsor as well. The only recent Ford engine that's going to give you that kind of performance in a reliable, streetable package is the 385 series. A moderately built 460 will produce a reliable 500 HP / 500 ft-lbs; a 514 will just as easily make 600.
Frankly, your goals are simply unrealistic. That level of performance with any engine makes a terrible daily driver. You give up way too much drivability and tractability to gain performance that 99% of the time you simply cannot use. If you aim for something in the 300-350 HP/TQ range you will have an excellent tow vehicle and a much more user-friendly piece of transportation. Just my $.02
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Alright thats cool. What is a good tubro to run about 8-12 psi?
A small trimmed T04B would probably give you what you need. Look up the turbo maps and decide for yourself.
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mustangsally":36xdvnv0 said:
Don't look at it in terms of X lbs of boost you want to run. 25lbs of boost with a T25 (i.e. way too small) will pull like dogs' business.
For this project, we need a whp goal primarily and an acceptable amount of boost to reach it secondarily. I think 20psi boost max with the right turbo could be reliable if we intercool it. Add methanol injection, and I think we can do this on pump gas.
As mentioned above, I think a T04E/B compressor (450hp or so) with a 0.82AR T3 exhaust side (the turbo on my Spirit R/T, but with a larger AR) might pull it off on the smaller end of feasible turbos.
If we can get a looser converter (maybe 2500-2800rpm stall), a PT44E (565hp compressor) ought to really pull hard. They work great with a stock SyTy GMC 4.3L which has crappy heads and next to no cam (the Chevy Astrovan has a bigger cam).
I’d think the larger displacement 300 six would spool the sucker even better, though I question how well the heads on these flow up top.
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