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> How fast is fast enough – Turbocharging the LS, Screamsicle gets a Turbo
burton73
post Dec 7 2020, 11:25 AM
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QUOTE(cali914 @ Dec 7 2020, 09:05 AM) *

Great question and I think there is a simple answer. Fast enough is when it breaks, and on the street the more hp, the more wheel spin, or something has to give. So I guess the answer is there is a limit to no limits. LOL Twin Turbo LS you have to get the gearbox from the C8. (IMG:style_emoticons/default/beerchug.gif)



He has a 4 speed gearbox from a 930 Porsche. Good for over 650HP so that should not break -930 CVs?

Bob B
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dan10101
post Dec 7 2020, 12:11 PM
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QUOTE(burton73 @ Dec 7 2020, 09:25 AM) *

QUOTE(cali914 @ Dec 7 2020, 09:05 AM) *

Great question and I think there is a simple answer. Fast enough is when it breaks, and on the street the more hp, the more wheel spin, or something has to give. So I guess the answer is there is a limit to no limits. LOL Twin Turbo LS you have to get the gearbox from the C8. (IMG:style_emoticons/default/beerchug.gif)



He has a 4 speed gearbox from a 930 Porsche. Good for over 650HP so that should not break -930 CVs?

Bob B


Yes, 930 CVs.
The wide range 4spd means less shifting. 60-100 and maybe even 30-100 times could be done without shifting if I have the gearing right. So that may be where I have my most fun if I'm allowed. (IMG:style_emoticons/default/shades.gif)
Can someone confirm my gear ratios? I believe it's a 78 930 box.

Diff 4.22
1st 2.25
2nd 1.304
3rd .893
4th .625


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sixnotfour
post Dec 7 2020, 12:45 PM
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930/34
930 Turbo 1978-85

4-speed fully-synchronized transaxle

Manufactured by Porsche (ZF)

Long bell housing

Plate-type limited-slip differential available

Rod shift

Single-plate clutch

Gear ratios:

1st gear: 2.25

2nd gear: 1.304

3rd gear: 0.893

4th gear: 0.625

Ring and pinion: 4.22
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burton73
post Dec 7 2020, 12:54 PM
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I have a short bell housing on mine, does that make it a 1977?

Bob B
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dan10101
post Dec 7 2020, 01:01 PM
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Bob, I can't answer that but here is mine for comparison.

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dan10101
post Dec 7 2020, 01:08 PM
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Well, according to this website. I have an earlier trans. 75-77
And lower diff gears.

https://californiamotorsports.net/pages/por...e-specification

I don't know if that will matter at all, but just trying to keep it straight.
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dan10101
post Dec 7 2020, 01:14 PM
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Actually Bobby Hart from CA Motorsports rebuilt it last.
I'm guessing he would discourage a turbo setup. (IMG:style_emoticons/default/sunglasses.gif)



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burton73
post Dec 7 2020, 01:15 PM
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Mine is set up to run upside down and has oil squirter set up for the trans to run with an oil cooler or not. The place that built it GBox said I would not need to run it but it is set up for it.


Bob B
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sixnotfour
post Dec 7 2020, 01:27 PM
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https://www.gboxweb.com/930specs.html

930/30
930 Turbo 1975-76

4-speed fully-synchronized transaxle

Manufactured by Porsche (ZF)

Short bell housing

Plate-type limited-slip differential available

Rod shift

Single-plate clutch

Gear ratios:

1st gear: 2.25

2nd gear: 1.304

3rd gear: 0.893

4th gear: 0.656

Ring and pinion: 4.22
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dan10101
post Dec 7 2020, 01:34 PM
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QUOTE(burton73 @ Dec 7 2020, 11:15 AM) *

Mine is set up to run upside down and has oil squirter set up for the trans to run with an oil cooler or not. The place that built it GBox said I would not need to run it but it is set up for it.


Bob B



Yeah, Michael Cuoco on the Facebook group is setup that way. I'm guessing when they built my car, they weren't sure if it would oil correctly in that orientation. Now you guys can save the bucks to flip it internally. His looks to be the later case.

I'm thinking mine has the later gear ratio. 4.22. The gearing doesn't seem to add up. Maybe my speedo is off. I'll have to do some testing.

Here is Michaels

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dan10101
post Dec 7 2020, 01:36 PM
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QUOTE(sixnotfour @ Dec 7 2020, 11:27 AM) *

https://www.gboxweb.com/930specs.html

930/30
930 Turbo 1975-76

Ring and pinion: 4.22


Thank You.
That makes more sense.
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AZBanks
post Dec 7 2020, 02:06 PM
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I have one of these kits in my garage, still in boxes. Too bad it is for an LT, not an LS.

https://www.bankspowerproducts.com/Banks-Po...tem-p/21103.htm
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dan10101
post Dec 7 2020, 02:15 PM
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QUOTE(AZBanks @ Dec 7 2020, 12:06 PM) *

I have one of these kits in my garage, still in boxes. Too bad it is for an LT, not an LS.

https://www.bankspowerproducts.com/Banks-Po...tem-p/21103.htm


There I fixed it for you.
Can't go wrong with Banks. And you could probably sell the Banks headers for more that the ebay headers.

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tygaboy
post Dec 7 2020, 02:29 PM
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Dan - I'm running a set of eBay turbo forward headers and I have to say, for $160, they are actually pretty nice. I wouldn't hesitate to recommend them, if that's the sort of set up you need.
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sixnotfour
post Dec 7 2020, 02:41 PM
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Way Back 1986


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rhodyguy
post Dec 7 2020, 03:19 PM
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Chimp Sanctuary NW. Check it out.
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That looks like the engine comp might get a little warm. Even with the heat shielding.
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Andyrew
post Dec 7 2020, 03:28 PM
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Hey all, voice of reason over here.. He's going with ONE ~1000hp turbo mounted by the passenger headlight, not two (IMG:style_emoticons/default/smile.gif)
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Andyrew
post Dec 7 2020, 03:30 PM
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QUOTE(sixnotfour @ Dec 7 2020, 12:41 PM) *

Way Back 1986


Funny thing is, I tried to get Dad (Dan) to buy this car as well... Unfortunately he had not sold the El Camino at the time or else it would probably be in the garage...
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sixnotfour
post Dec 7 2020, 03:42 PM
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QUOTE
Hey all, voice of reason over here.. He's going with ONE ~1000hp turbo mounted by the passenger headlight, not two


That's how kids these days do it
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rhodyguy
post Dec 7 2020, 03:45 PM
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Near the headlight? How does that work? Multiple meters of high pressure silicon tubing? Like Rich Bontempi's old race car with the cool air ducting running thru the interior of the car?
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