1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Opinions on Mystery Turbo

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Old 02-07-06, 09:12 PM
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Opinions on Mystery Turbo

First off, sorry for the cross post.

A guy on a local forum is selling this...

New
air reasearch
to4 turbo 6o trim

http://www.dragva.com/forums/showthread.php?t=121915

He absolutely will not look up the specs on it.
Unfourtunately it is not close enough for me to check it out, and if I do buy it, it would be shipped.

Im figuring for $300 its a pretty good deal and I could live with less than desirable specifications that will cause more lag and up the rpm band.

I would be running this on my streetported (9.7 rotors) 84 SE with an rx3mist.com manifold. A megasquirt for fuel managment and a large front mount.

Should I take the chance and buy it or not.

Thanks
Greg
Old 02-07-06, 09:17 PM
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That link says they're upgrading hardware, got any other info on it in a different location?
Old 02-07-06, 09:24 PM
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Thats all the info I have on it. Apparently the turbine discharge is 2.5 and a .60 AR Compressor Housing.

Heres some pictures of it.

http://img.photobucket.com/albums/v521/sj7/Phtbto48.jpg
http://img.photobucket.com/albums/v521/sj7/Phos47.jpg
http://img.photobucket.com/albums/v521/sj7/Phto42.jpg
Old 02-07-06, 10:15 PM
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FB+FC=F-ME

 
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Looks decent sized.Its definately not a hybrid,youll need an external wastegate.

Its completely dependant on the A/R,especially the hotside.The 60-1 TO4 is a very popular turbo for the FC crowd,350-400HP is a common number thrown around.Those guys typically go bigger on the intake A/R.Id browse around the 2nd gen sites for info.You might have an SE engine,but its still a 13B,same size as a TII engine.

I would be very cautious about running a turbo that size on a ported SE engine with 9.7:1 rotors.It wont take much boost to get the working compression ratio up to extreme levels.The SE block(especially the rear iron) was never meant to be turbocharged at all,let alone with a turbo capable of pushing 14 or more psi into a 13B.Keep it low,in the 5-7psi range until your sure everything is OK.If you pop it,you might wanna consider a S5 TII engine.It has the stronger rear iron and rotors with a decent 9.0:1 ratio.I take mine to 14psi everytime I drive.....

Last edited by steve84GS TII; 02-07-06 at 10:17 PM.
Old 02-07-06, 10:25 PM
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I believe its actually an S4 block with S5 rotors and think SE middle irons (for the injectors)

I only plan on running max 10 - 12 psi, so hopefully that wouldnt be a problem.

Last edited by HadaGSL-SE; 02-07-06 at 10:34 PM.
Old 02-07-06, 11:39 PM
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Not possible since the 1st gen and 2nd gen engines had different water groove locations.Rotating parts are the only engine pieces interchangable between the FB and FC.

It would be best to figure out your exact engine specs in order to determine it's strength and capabilities.10-12 psi shouldnt strain the rear iron,but its always best to know about your internals,just to be sure.
Old 02-07-06, 11:49 PM
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Not all S5's had the reinforced rear dowel, it was really a luck of the draw. Usually the only time you crack the rear iron dowel area is if you're up over the 400 mark or you detonate. I do agree though that you should learn a bit more about your engine and other things before trying to turbo it.
Old 02-08-06, 10:28 AM
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I agree, its always good to knowexactly what you have.

I had it built by Kevin Landers. I supplied the S5 rotors, I believe its an S4 block but it most certainly has the injectors in the center iron. I got my old block back minus the front cover and oil pan. So he didnt reuse anything but those parts. Parts may have been used from another SE though.

This will only be a "low" boost car. I was thinking about 8 psi regularly with 10-12 max.
Chances are I will want it a 10-12 all the time though.

I initially was just going to run an S4 turbo and call it a day. Thats probably the better option as my power goal is 250 - 300 rwhp.
Old 02-08-06, 10:44 AM
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All of the 86-92 13B's had injectors in the middle iron (possibly the GSL-SE too?), so it's probably a s4 or s5 keg. The compress would be a good match for those levels, but it's hard to gauge the A/R on the turbine, though I don't think by the looks of it that it would be too small.
Old 02-08-06, 04:29 PM
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Do you think it would be better to run this or a T2 turbo for my power goals.

I know that the T2 (S4 or S5) would be cheaper since I wouldnt need to buy a wastegate and all, but this would give me some room to improve. Then again this one is brand new, and I wont be finding a brand new T2 turbo.

Here is a guess on its specs " to4b with .96 on center housing and p trim turbine"
Old 02-08-06, 05:03 PM
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The hotside will work well on a rotary application, however it'd be nice to know the trim of the compressor as well, that would determine largely how much power it would be good for. I would suspect it probably has a V trim, which would be ideal for about 350-400rwhp.
Old 02-08-06, 08:17 PM
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So which should I get, TII turbo or this T4 for a 250-300 rwhp power goal?
Old 02-08-06, 09:17 PM
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the TII will be cheaper in the long run (no need for a t4 manifold/wastegate), but won't have the same power.
Old 02-08-06, 10:21 PM
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Well I plan on getting a custom manifold from rx3mist.com same as FBII's setup.

http://www.rx3mist.com/selling.htm

one like those pictured there, that way it will clear my intake manifolds and apparently they make better power as well. So having a T4 manifold wont be too much more expensive. I have yet to price wastegates though.

Thanks for all your help so far.
Old 02-08-06, 10:29 PM
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250-300 WHEEL hp is pushing it pretty hard with a S5 hybrid.No way you could do it with the stock TII turbo,youd at least need a TO4 compressor upgrade,which would cost as much as the turbo your looking at right now.The plus side would be the simpler wastegate,but if it were me,Id go for the full TO4.
Old 02-08-06, 10:41 PM
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I see,

What kind of power are you putting out with yours steve? I know your running the stock ECU and all. I love your car btw, excellent craftsmanship, the hood, everything is beautiful.

I would be happy with a 12 second car, which I should be able to achieve with the T2 turbo I believe. It still will be mostly a autox and track day car though.

Theres a guy around here running a jdm T2 in a first gen with an automatic. Ive seen it run deep into the 12's with a front mount and upped boost. Quiet as hell and slow of the line but it just rips up top. (Runs downs camaros and mustangs the last 1/8th mile)
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