diy 1.6 turbo questions
#1
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diy 1.6 turbo questions
i am thinking about boosting my miata to get a little more power out of it. i a;ready have a fmu, 255hp fuel pump and a 6 puc clutch. i was going to just get the manifold, downpipe, and bov off of ebay. a friend of mine has a stock 1g mx6 front mount i am going to get and i was going to use a 14b or t25 from a DSM. retard the base timing to 6 deg and thats it. and i have a 12:1 disk in the fmu now, but looks like everyone runs a 8:1, so i will need to get another disk.
i will probaly upgrade later on, but just want a simple, basic setup for now. i have megasquirt on my probe, so i will probally just build another one for the miata and get bigger injectors and raise the boost later on.
does it sound like i have everything planed out ok so far?
i will probaly upgrade later on, but just want a simple, basic setup for now. i have megasquirt on my probe, so i will probally just build another one for the miata and get bigger injectors and raise the boost later on.
does it sound like i have everything planed out ok so far?
#3
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just ssac stuff. i am running there stuff on my probe and everything works perfect. if the mani cracks, i will just weld it
edit: like this
edit: like this
Last edited by bryantaylor; 02-24-2007 at 08:42 PM.
#11
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i have been runing ebay turbo, wastegate, bov, intercooler, and pipes on my probe for a couple of years now with no problems. the problem most of the time with the ebay stuff is not the parts, it the person using it. and i am not going greddy, i would rather peice my own together
#14
First, you've read through this right?
https://www.miataturbo.net/forums/showthread.php?t=4288
Overall, looks like a good start for about 7-8psi.
With stock injectors, even with the 255, you'll run out of fuel after that, and with just 6* of static timing, I wouldn't run any more than that. Brain might tell you it's OK to run a little more if he's up for some calculations.
Have you sourced an oil feed/drain line yet? How do you plan to route?
Most of us peform a fuel rail mod to make it dual-feed.
You can skip the 02 clamp if MS in definitely in your future.
I ran the .48/.49 DSM for awhile and had a huge boost overshoot problem... granted I was spiking to almost 18psi, but you can expect to spool by 2000rpm's with 8psi by about 3000rpm... and then a smooth decline to a steady 6psi to redline. The cure seems to be to port the wastegate hole or engineer a helper spring. I'll have the results of my new .80/.64 T25 next week.
I think you'll want to look into heat shielding with the top-mount manifold. I'm thinking about melted brake reservoirs! If you're handy with the welder, some sheetmetal stock will do fine. Just look through the VBGarage for ideas. There's also a turbine-blanket in the group buy section.
My biggest piece of advice is to do it right from the start. I cheaped out on my initial build and have been playing catch-up for 6 months. It souds like you've got some prior turbo experience and some decent shop skillz, so you know what I mean. Do us a favor, fill out your profile, signature, and throw up some pics in the vbGarage. It'll help when you want advice. Where are you located, there might be some locals around to help out in person! You definitely came to the right place. Keep us informed.
https://www.miataturbo.net/forums/showthread.php?t=4288
Overall, looks like a good start for about 7-8psi.
With stock injectors, even with the 255, you'll run out of fuel after that, and with just 6* of static timing, I wouldn't run any more than that. Brain might tell you it's OK to run a little more if he's up for some calculations.
Have you sourced an oil feed/drain line yet? How do you plan to route?
Most of us peform a fuel rail mod to make it dual-feed.
You can skip the 02 clamp if MS in definitely in your future.
I ran the .48/.49 DSM for awhile and had a huge boost overshoot problem... granted I was spiking to almost 18psi, but you can expect to spool by 2000rpm's with 8psi by about 3000rpm... and then a smooth decline to a steady 6psi to redline. The cure seems to be to port the wastegate hole or engineer a helper spring. I'll have the results of my new .80/.64 T25 next week.
I think you'll want to look into heat shielding with the top-mount manifold. I'm thinking about melted brake reservoirs! If you're handy with the welder, some sheetmetal stock will do fine. Just look through the VBGarage for ideas. There's also a turbine-blanket in the group buy section.
My biggest piece of advice is to do it right from the start. I cheaped out on my initial build and have been playing catch-up for 6 months. It souds like you've got some prior turbo experience and some decent shop skillz, so you know what I mean. Do us a favor, fill out your profile, signature, and throw up some pics in the vbGarage. It'll help when you want advice. Where are you located, there might be some locals around to help out in person! You definitely came to the right place. Keep us informed.
#15
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thanks for the post man. this isnt my first turbo car, i built up my other car in my driveway. but i have never messed with FMUs and stock injectors. i was just going to use the port on the block for the feed and tap the pan like in the FAQ for drain. and i know mitsu turbos are water cooled and from the pic of the oil drian, it looks like i would just tap into the coolant line under the manifold for the water.
#19
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You are correct.
I have it, it fits. Sorta. Nothing you can't handle though. It sound like you know what you're getting into, so as long as you realize the limitations of the parts you're building with, knock yourself out.
As for the water, yes just tap into the coolant line.
Get a 190hp.
As S(p)amnavy said, I too cheaped out on my build, except I really cheaped out. All I can think about now is starting over. YMMV. Best of luck