Borg Warner S380 reports

[Dusty Bradford]

Don, with the alky and using n20 to spool you can run the largest hot side you want. You will see lower backpressure which is always a plus. The only reason to run a smaller housing is to help spool, you don't have to worry about that.

 

[Red C5]

We have had great sucess with our BW units and all our dealers and distributors seem to love them. We have built quite a few for the GN guys, most of them running the 1.00 and 1.1A/R housings. I know one of the guys on here has out ST80R and 1.1A/R and made some stupid #'s on the dyno. He already has taken it off and has gone to the FI91X which will make ALOT more power. The 91X flows over 165lbs/min and is almost a drop in fit to a GT47-88 and GT55-91...its just a touch longer in size. Will be interesting to see how it all develops.

So is there an advantage going with the 91X over the GT47-88? I've been wanting to switch to the GT47 but may just go the V8 route instead. I'd really like to see how far I can push this motor with a big turbo though.

 

[Alky V6]

JZ. I'm looking forward to talking on the phone with you tomorrow. I have some appointments in the morning, so it'll be afternoon when I call.

Others seem interested in this thread so I'll try to keep it running.

So everyone is clear about what I'm looking for, I'm looking for a decent exhaust bp number and compressor that is not on the edge of unit overspeeding or efficiency. I would like 70+% efficiency at max flow for my combination. Not 60%. I suppose this means that I'd like a bit of capacity cushion in the compressor map. I realize this may mean longer spool time. Would there be any other bad effect of sizing this way?

The variables are:
1235 target horsepower.
224 cid.
Methanol fuel.
7500 rpm.
40-45 operating manifold pressure.
A 200hp shot of nitrous/methanol will be used for spooling assist. Turned off at 16+ psi.
Relatively large duration and overlap cam specs.
Long tube tuned primaries with short collectors before the turbo.
No compressor surging.

Would the BW 85 comp wheel be a better choice?

I hear you Dusty and John. I'm sure the T6 housing is the way to go.

 

[JZ 97 SS 1500]

So is there an advantage going with the 91X over the GT47-88? I've been wanting to switch to the GT47 but may just go the V8 route instead. I'd really like to see how far I can push this motor with a big turbo though.

A 47-88 only flows around 139lbs/min, compared to the 165 of the 91X it will make a good bit more power. Spool up will be a little slower due to the larger wheels, but nothing a little tuning won't solve.

 

[JZ 97 SS 1500]

JZ. I'm looking forward to talking on the phone with you tomorrow. I have some appointments in the morning, so it'll be afternoon when I call.

Others seem interested in this thread so I'll try to keep it running.

So everyone is clear about what I'm looking for, I'm looking for a decent exhaust bp number and compressor that is not on the edge of unit overspeeding or efficiency. I would like 70+% efficiency at max flow for my combination. Not 60%. I suppose this means that I'd like a bit of capacity cushion in the compressor map. I realize this may mean longer spool time. Would there be any other bad effect of sizing this way?

The variables are:
1235 target horsepower.
224 cid.
Methanol fuel.
7500 rpm.
40-45 operating manifold pressure.
A 200hp shot of nitrous/methanol will be used for spooling assist. Turned off at 16+ psi.
Relatively large duration and overlap cam specs.
Long tube tuned primaries with short collectors before the turbo.
No compressor surging.

Would the BW 85 comp wheel be a better choice?

I hear you Dusty and John. I'm sure the T6 housing is the way to go.

Don with the setup you are talking it sounds like you would be choked off with the 80mm unit...lol. I would probably move up to the FI-X unit. Your setup looks like you can pretty much spool anything...lol. That's some serious #'s your posting. The 200 shot alone would spool a thumper on a 4 cyl...lol

 

[WHITE T]

Jose,

What about the FI-88x compared to the GT47-88?

What lbs/min does the FI-88 produce?

Thx

 

[Alky V6]

Don with the setup you are talking it sounds like you would be choked off with the 80mm unit...lol. I would probably move up to the FI-X unit. Your setup looks like you can pretty much spool anything...lol. That's some serious #'s your posting. The 200 shot alone would spool a thumper on a 4 cyl...lol

I'm already doing this. Just not with the right turbo. Takes a T76 to 16 psi in around .4 seconds.

 

[JZ 97 SS 1500]

Jose,

What about the FI-88x compared to the GT47-88?

What lbs/min does the FI-88 produce?

Thx

According to the map, the FI-88X flows 145lbs/min.

 

[JZ 97 SS 1500]

I'm already doing this. Just not with the right turbo. Takes a T76 to 16 psi in around .4 seconds.

Don, great talking with you. I think this will solve your T76 woes....

 

[Alky V6]

Thanks for the help JZ.

FI91X is on order.

 

[John Wilde]

Don,

I love it you are finally taking the training wheels off of her.
Please make sure you have a race sway bar and boost controller now.

 

[Alky V6]

I know, it's time. I'm getting the TRZ bar you suggested, and I'm looking at the AMS units.

 

[John Wilde]

I know, it's time. I'm getting the TRZ bar you suggested, and I'm looking at the AMS units.

I just want you to go fast and safe with class.
BTW Cal is an AMS and TRZ dealer, maybe you can get a package deal!

 

[Alky V6]

I just want you to go fast and safe with class.
BTW Cal is an AMS and TRZ dealer, maybe you can get a package deal!

I'll look into it. Thanks John. I really appreciate the help.

 

[Alky V6]

JZ. When you get a chance, hopefully you can answer some questions for me. I'd like to plug some numbers for the new turbo into a sim that I play with.

I need some data off the comp map:
The flow in lbs/min at peak compressor efficiency, the PR that this occurs at and the efficiency percentage at that peak efficiency area.
The flow in lbs/min at the compressor surge line at a PR of 2.0.
The max flow in lbs/min of the compressor.

Some other general questions. What is the ceiling PR limit for the compressor?

 

[WHITE T]

Thanks for the help JZ.

FI91X is on order.

Donnie,

Now we are talking!

Please tell me you will come to Phoenix again this year with this new combo!

 

[Alky V6]

Donnie,

Now we are talking!

Please tell me you will come to Phoenix again this year with this new combo!

Has a date been set for a WCNationals this year?

 

[WHITE T]

Well..

I have heard PHX same time as always (weekend of Thx giving)

And now Vegas as well.. Weekend of Oct 3rd.

Looks like 2 events this year!!

 

[JZ 97 SS 1500]

JZ. When you get a chance, hopefully you can answer some questions for me. I'd like to plug some numbers for the new turbo into a sim that I play with.

I need some data off the comp map:
The flow in lbs/min at peak compressor efficiency, the PR that this occurs at and the efficiency percentage at that peak efficiency area.
The flow in lbs/min at the compressor surge line at a PR of 2.0.
The max flow in lbs/min of the compressor.

Some other general questions. What is the ceiling PR limit for the compressor?

I have most of the info you need. I will need to sit down and calculate the rest.

 

[Chevota]

This is gonna get interesting.....When will the swap be completed?

Scott Wile