supercharger/turbo 411

[SuperchargedSHOguy]

not to turn this into a maint thread but nobody ever mentions the crank bearings, i've changed my rod bearings at 199K but i think i'm going to do the crank bearings just to do them. are they not prone to failure at high milage or should i definately change them before i cram 9-12 psi down its throat.

main bearings have not shown to wear anywhere near as fast as the rod bearings. Plus it is alittle more advanced than doing rod bearings.

 

[celticsam]

The SHO is a very different car than a Fiero...but if a KIT can be bought to provide a reliable 50% increase in power for under $3000 (just as a reference, here's the link http://members.shaw.ca/turbofiero/Manual.htm ) including "R&D", there is no reason that it can not be done for the SHO. BTW, this was the model (albeit in its early form) that my set-up was based on. I would be happy to provide pictures to those interested...the point is the general system will work on any car if the computer can be adjusted to understand the signals it recieves under boost and react accordingly. I may not know the SHO engine as well as the 60 degree V6 (I have owned 2 SHO's in the past...which isn't much compared to some on this list), but on paper, the SHO engine should do better under boost that the GM junk that I have played with. The experience of those who have boosted their SHO's is priceless, and I have the utmost respect for those who have gone into the poorly mapped territory of boosting their SHO's....but it can always be done right...and more economically. At least, that's what I am hoping.

Neil

 

[HoustinoJillian]

Custom modified Garrett T3 Turbo with water cooled bearing and integral wastegate
Compressor By-Pass Valve
Boost Gauge and Air/Fuel Meter and Pod
Polished Stainless Steel pipes.

thats all your 2600 dollar fiero kit comes with. so how can you say that a SHO kit which includes the SHO equivalent PLUS other supporting mods/parts will cost less?

 

[NotSoSlowSHO]

What, now the cutoff price is 3k?

Estimate for turbo addition? $2000. Done. Neil

And the link you provided to the Fiero turbo "kit" isnt much of a kit. Turbo (very small one at that), bypass valve, boost gauge, A/F gauge (probably not even a wide band), and plumbing. Thats IT???

I would be happy to provide pictures to those interested...the point is the general system will work on any car if the computer can be adjusted to understand the signals it recieves under boost and react accordingly.

Do remember that a proper tuning setup costs near another $1k.

 

[yamahaSHO]

At the 300hp level, stock injectors are fine. Bring the fuel pressure up with the boost to compensate for the extra charge, and things are ok up to 7 or 8 pounds of boost (more boost than I will need).

300hp on the stock injectors is pushing it. Let's look at it this way.

NA - Recommended

(24/.45) x 6 = 320hp

Boosted - Recommended

(24/.55) x 6 = 262hp

Now, take those numbers and multiply them by .7 to find out what the injector can support at 70% duty cycle. If you notice, under NA conditions, the SHO injectors will support 224hp.

In addition, the stock FPR is not ideal under boost. Start boosting the fuel pressure and watch the WEAK stock SHO pump give you problems by cracking piston ring lands.

If you want to do this, go ahead, just be sure to post pictures of the blown motor when it happens. Take your time and do more research. I built my own supercharged SHO and I've worked on at least 3 more, one of which producing over 100 more hp than a GT-40.

You know, you're talking to people who have "been there and done that". I've made my own mistakes, but MOST IMPORTANTLY, I watched and learned from other peoples mistakes. In all honesty, I don't care if you blow up your motor, it'll just give us another story to tell when the next guy comes on the forum and wants to do the same as you.

main bearings have not shown to wear anywhere near as fast as the rod bearings. Plus it is alittle more advanced than doing rod bearings.

A tight belt on a supercharged motor has shown to significantly wear the front main bearing. We pulled Pat's white car apart a couple weeks ago to find LOTS of wear on the upper bearing. There was more copper showing than I've seen on worn rod bearings. He's going to fix this issue by relocating the idler pulley and slotting the pulley like a Reichard.

If you're not going to tune the motor, you might as well just give me your car... I'll take the rev limiter off it and see how fast I can go in first gear before the things destroy's itself.

I lasted about two months with 9lbs before I got bored.

I wasn't going to go over 6 PSI on my car.... Now I'm looking for 550-600hp.

 

[NotSoSlowSHO]

If you're not going to tune the motor, you might as well just give me your car... I'll take the rev limiter off it and see how fast I can go in first gear before the things destroy's itself.

Now THAT sounds like fun! :corn:

 

[UnderPSI]

yamahoSHO, if you are going to quote me, at least quote what I said. Not what someone else said. Thanks.

The point is getting into a budget turbo system that the motor can handle. Then upgrading the engine and turbo from there. A stock SHO will live on 7lbs without a Tweccer.

 

[NotSoSlowSHO]

A stock SHO will live on 7lbs without a Tweccer.

Not for long, with a stock fuel system.

POP goes the SHO :wave:

 

[UnderPSI]

Not for long, with a stock fuel system.

POP goes the SHO :wave:

At 7lbs, a 255lph and an FMU can handle the fuel.

 

[NotSoSlowSHO]

At 7lbs, a 255lph and an FMU can handle the fuel.

Sure it can, but you did say a STOCK SHO.

 

[UnderPSI]

Sorry about that, but I did list it as part of a low budget setup earlier in the thread.

 

[SuperchargedSHOguy]

Sorry about that, but I did list it as part of a low budget setup earlier in the thread.

now go build it, stop bench building. :corn:

 

[yamahaSHO]

Sorry about the confusion. I changed the name.


Anyway, please do this... When you blow up the motor we'll have to 'sticky' this. There's built motor with all the proper modifications blowing up.....

 

[celticsam]

I don't know about him...but I am. Out of curiosity, if the stock SHO fuel pump is not up to the task, what is recommended? I would like to keep the in tank design. Also, do GM style injectors fit the Ford fuel rails? If so, I have a set of 30# (I think) Accell injectors from a TPI setup soon to be listed on e-bay (along with a bunch of other GM related stuff). I could just use them. Oh, and I wasn't even aware of Tweecer...now that I have researched it a bit, I think that I'll have to use that....

 

[NotSoSlowSHO]

Out of curiosity, if the stock SHO fuel pump is not up to the task, what is recommended? I would like to keep the in tank design. Also, do GM style injectors fit the Ford fuel rails?

Most FI SHOs run a 255lph pump (stock style in-tank) along with an adjustable fuel pressure regulator. Pump is cheap, regulator is not.

Id assume if you have the correct harness and the rails machined to work with the GM injectors, it would work. But most people I have heard about running high flow injectors run Ford injectors. I have a set of 42# Ford injectors for my project. And the rails still need to be modified.

 

[UnderPSI]

now go build it, stop bench building. :corn:

I've done four bangers, 5.0's, big blocks, deisels, V6's, just not the SHO. Yet.

 

[SuperchargedSHOguy]

Id assume if you have the correct harness and the rails machined to work with the GM injectors, it would work. But most people I have heard about running high flow injectors run Ford injectors. I have a set of 42# Ford injectors for my project. And the rails still need to be modified.

Most GM and Ford highflow injectors are the same.

 

[yamahaSHO]

Most FI SHOs run a 255lph pump

A 255lph pump will support more power than we'll ever make in a SHO, but the lines are so small that they will not flow enough fuel with a smaller pump.

 

[NotSoSlowSHO]

interesting factoid

 

[UnderPSI]

The stock 5.0 fuel lines at 5/16ths, will support over 500hp. I've seen a 'stagn run over 600hp with those same size lines. With a single intank Walbro 255lph.