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sdbob · 03-09-2015, 11:34 AM

Watching exotic cars sat. The one car was turbo and supercharged. They said it did not have the 'lag'. Just wondering any info? Thanks .

Tom Vaught · 03-09-2015, 12:18 PM

You can do what is called Series/Sequential Boosting. This article does an ok job on explaining the basics:

https://www.dieselnet.com/tech/air_turbo_multi.php

The idea is you use either a smaller turbo charger or a supercharger to fill in the bottom part of the acceleration curve and then by-pass the smaller unit and continue on with the larger Turbo supplying the top end power.

Tom V.

sdbob · 03-10-2015, 07:53 AM

Thanks Tom.

johnta1 · 03-10-2015, 08:56 AM

Read these links:

Twin Charging

Twincharging

Half-Inch Stud · 03-10-2015, 05:10 PM

Adiabatic eff is the big deal.
Variable Vane being the best pumper.
Centrifugal "turbo" is next best.
Twin Screw is also-ran; ran hot
Roots the lesser of Twin Screw, runs hottest.

Turbo gets the Adiabatic eff grade.

add intercoolers to any & all, still yields Turbo advantage.

vin63 · 03-18-2015, 05:35 PM

Quote:

Originally Posted by sdbob

Watching exotic cars sat. The one car was turbo and supercharged. They said it did not have the 'lag'. Just wondering any info? Thanks .

The marine industry has been using that type of sequential supercharging for many years. Some of my favorite memories are hanging out with my uncle while he worked on the marine diesel power plants on the tug and offshore tug boats. If you want to see some in action, do a quick search on YouTube for MTU Detroit Diesel marine power plants - big time continuous horsepower.

BLACKGP · 09-26-2015, 08:55 AM

With a modifed 301 turbo type setup (larger turbo, mpfi), paired with a small vortech blower be feasible for 600 horsepower? 301 stroker build (3.25 crank). Or, would a twin turbo blow thru tbi setup be a better option?

Tom Vaught · 09-26-2015, 10:17 AM

Quote:

Originally Posted by vin63

The marine industry has been using that type of sequential supercharging for many years. Some of my favorite memories are hanging out with my uncle while he worked on the marine diesel power plants on the tug and offshore tug boats. If you want to see some in action, do a quick search on YouTube for MTU Detroit Diesel marine power plants - big time continuous horsepower.

Massive Power but NOISY SUCKERS for sure.

A friend also worked on the Mississippi Tugs and has custom (Doctor's office) ear plugs for each ear.

That being said, compound boosting on aircraft was done in the late 30s/early 40s by the Germans on their aircraft.

Tom V.

BruceWilkie · 09-26-2015, 02:33 PM

A thread about compound turbocharging has been on going on YellowBullet since 2010. Page 71 recently started. Its fairly interesting if you have the time.

http://www.yellowbullet.com/forum/sh...d.php?t=216811

There are other posts on that site involving compound 'charging if you search enough.

PontiacJeff has been playing with this on a late pontiac(SSEI iirc) combining the blower on his v6 with a turbo. Havent had much time to check with him on results/progress but recall early on(a few years back) he was having good results.

JD311 · 10-03-2015, 03:16 PM

How about a 144 street blower and like an s480 for a street strip set up? The blower would add heat though and take some efficiency away.Just curious as I could have gotten a few of these for cheap. I have a s480 with e heads going on a 400 with trw pistons and eagle rods for a turbo test motor lol. Got a 59 block for later use with 980 crank.

70 bird · 10-03-2015, 08:20 PM

Quote:

Originally Posted by JD311

How about a 144 street blower and like an s480 for a street strip set up? The blower would add heat though and take some efficiency away.Just curious as I could have gotten a few of these for cheap. I have a s480 with e heads going on a 400 with trw pistons and eagle rods for a turbo test motor lol. Got a 59 block for later use with 980 crank.

A 144 might act like a restrictor plate with a s480.lol. I have a s480 on a 351 cid. ford, I have no problems spooling it. A 400 Pontiac should be a very good match for a s480!

BruceWilkie · 10-03-2015, 11:38 PM

Quote:

Originally Posted by JD311

How about a 144 street blower and like an s480 for a street strip set up? The blower would add heat though and take some efficiency away.Just curious as I could have gotten a few of these for cheap. I have a s480 with e heads going on a 400 with trw pistons and eagle rods for a turbo test motor lol. Got a 59 block for later use with 980 crank.

A restriction on a 400 IMO... but I like the concept. How about a 6-71 on a chiller? Fed with intercooled twin S472's with the 96mm 1.32 turbines. That seems doable IMO.

Quite awhile back I rode in a 55 chevy with 229 v6 and a 144...it seemed a good match and probably a low 12 car if he would have got it to the track. I think two 144's side by side would be ok at 400 plus ci

JD311 · 10-04-2015, 04:46 PM

I was thinking the 144 would be a restriction, More of a concept than really lol

Tom Vaught · 10-04-2015, 08:52 PM

A Eaton Engineer Mike Sitar (years ago) did a dual supercharger deal on a Thunderbird (small) and a Ford V-8 Pushrod engine. Ran pretty good really.

http://www.toohighpsi.com/SCTC/sctc.htm

THEN CLICK ON ENGINE ON THE LEFT SIDE OF THE PAGE.

Tom V.

Tom McQueen · 10-12-2015, 04:00 PM

How well does turbocharging work?

The Nissan GT-R is an all wheel drive twin turbo 3.8L V6. The standard model makes like 525hp. The Nismo version is at 600. Get a ride in one.

AMS has a complete engine upgrade. Not cheap. But. Its a 4.4L V6 with excellent street manners. And....
It will accelerate from 0-60 in under 1.65 seconds.
It will accelerate from 60-130 in under 2.95 seconds.
And run 8 second 1/4 miles.

With the radio on.

STEELCITYFIREBIRD · 10-13-2015, 02:09 PM

My nephew has a GT-R.
I had it for 2 weeks while my brothers family was on vacation.
I looked like this

for 3 weeks, and my passengers like this

, downright awesome machine!

Skip Fix · 10-13-2015, 03:48 PM

I had a ride in a friend's small/big turbo tweaked Cummins diesel Dodge truck. Crazy fast diesel bet a 10 second ride if it would hook. A 30 roll and it lights them up.

johnta1 · 10-13-2015, 07:34 PM

Try this link on some very interesting reads on twin-charging.

Twincharging

critter · 10-13-2015, 07:40 PM

Drove the wife's Solstice GXP (turbo 2.0) through some fun roads on Sunday. With a mild computer tune it's putting out about 310HP. Believe me, in a car that size it's tons of fun. I ran that car at Memphis in stock trim and it turned 13.6 time slips. I'd say it's a low 13 or high 12 second car now. We could turn up the wick on it but it's her daily driver and I don't want to hurt it. But this little car has made a believer out of me on boost.

70 bird · 10-14-2015, 06:57 PM

Quote:

Originally Posted by critter

Drove the wife's Solstice GXP (turbo 2.0) through some fun roads on Sunday. With a mild computer tune it's putting out about 310HP. Believe me, in a car that size it's tons of fun. I ran that car at Memphis in stock trim and it turned 13.6 time slips. I'd say it's a low 13 or high 12 second car now. We could turn up the wick on it but it's her daily driver and I don't want to hurt it. But this little car has made a believer out of me on boost.

Try boost with a V8

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