Vacuum pump alternative
Moderators: plenzen, Nissan_Ranger
-
- Posts: 121
- Joined: 17 years ago
- Location: Greenville South Carolina
Vacuum pump alternative
I am now starting the turbo on my sd22. I want to get rid of the diesel alternator and replace it with a different one. The problem would be the power brakes. If I mounted a vacuum line on the intake of the turbo would this creat enough for the brakes?
1992 nissan pathfinder 4x4
1985 KC 720 4x4
1982 KC 720
1985 KC 720 4x4
1982 KC 720
- asavage
- Site Admin
- Posts: 5433
- Joined: 18 years ago
- Location: Oak Harbor, Wash.
- Contact:
Re: turbo and vaccum
No.bacho wrote:If I mounted a vacuum line on the intake of the turbo would this creat enough for the brakes?
If Nissan could have left off the vacuum pump, I think they would have
There is insufficient vacuum at the intake manifold to operate the brake booster.
You'll need another vacuum pump. A belt-driven or an electric drive. A couple of common belt-drive ones are pictured in this post.
There are nice electric ones too. They are not cheap. This one's $320 .
Regards,
Al S.
1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.
Al S.
1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.
-
- Posts: 640
- Joined: 18 years ago
- Location: Des Moines, Iowa
- asavage
- Site Admin
- Posts: 5433
- Joined: 18 years ago
- Location: Oak Harbor, Wash.
- Contact:
I just had a thought (it doesn't happen all that often). GM had an electric booster on some cars in the 80s. I know this because a friend of mine had three fullsize GM Wagons and I had opportunity to keep several of them running for a number of years.
1986 (and only 1986) Buick Estate Wagon used it. 1985 and 1987 both were conventional vacuum boost.
They are very expensive to replace, and when one of them burnt up I called several places to investigate having the motor rebuilt, nobody would touch it.
Eventually, I converted two of his Wagons back to vacuum boost, using 1985 LeSabre parts in one case.
(Note for anyone here due to a search engine: the brake pedal has to be replaced, because the master cylinder rod has a different diameter hole where it mates to the pedal. And get the vacuum line and fitting for the intake manifold and the check valve.)
NAPA NBB529700, $581 + $85 core:
While this wouldn't be cheap if you had to buy one new, if you happen across one of these in an old GM car, it could be adapted and fabricated into your truck.
1986 (and only 1986) Buick Estate Wagon used it. 1985 and 1987 both were conventional vacuum boost.
They are very expensive to replace, and when one of them burnt up I called several places to investigate having the motor rebuilt, nobody would touch it.
Eventually, I converted two of his Wagons back to vacuum boost, using 1985 LeSabre parts in one case.
(Note for anyone here due to a search engine: the brake pedal has to be replaced, because the master cylinder rod has a different diameter hole where it mates to the pedal. And get the vacuum line and fitting for the intake manifold and the check valve.)
NAPA NBB529700, $581 + $85 core:
While this wouldn't be cheap if you had to buy one new, if you happen across one of these in an old GM car, it could be adapted and fabricated into your truck.
Regards,
Al S.
1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.
Al S.
1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.
- kassim503
- Posts: 1027
- Joined: 18 years ago
- Location: Stony Brook, NY
Is That what that is?
I see them on the 80's jeep cherokees and wranglers, 90's ones too, anything with the shoebox style from the 80's (cherokee classic, cherokee sport). Also I spotted one in a 90's astro van, and a mid 80's bmw 5-series
If you need a set of dimensions/specs for one from a 93 ish wrangler, I can check it up for you tommorow, I got a friend that has one.
Yes, that high pressure bulb that says Warning! High pressure stumped me for the longest time, I never knew it was electric and not vacuum powered, but then again I havnt spent enough time under the hood of those cars to look or care enough to look.
Would you need some kind of computer system to run those?
I see them on the 80's jeep cherokees and wranglers, 90's ones too, anything with the shoebox style from the 80's (cherokee classic, cherokee sport). Also I spotted one in a 90's astro van, and a mid 80's bmw 5-series
If you need a set of dimensions/specs for one from a 93 ish wrangler, I can check it up for you tommorow, I got a friend that has one.
Yes, that high pressure bulb that says Warning! High pressure stumped me for the longest time, I never knew it was electric and not vacuum powered, but then again I havnt spent enough time under the hood of those cars to look or care enough to look.
Would you need some kind of computer system to run those?
'83 maxima sedan, l24e, a/t, black
227K SOLD 6/7/2012
227K SOLD 6/7/2012
- asavage
- Site Admin
- Posts: 5433
- Joined: 18 years ago
- Location: Oak Harbor, Wash.
- Contact:
I'm not sure that the black plastic reservoir is always a tip-off to having the electric pump below the MC.
No computer is required. It's a simple pressure switch, IIRC. And it's mondo expensive to replace the thing if you need one. My friend bought one new replacement, after that one went, I converted it back to vacuum boost.
No computer is required. It's a simple pressure switch, IIRC. And it's mondo expensive to replace the thing if you need one. My friend bought one new replacement, after that one went, I converted it back to vacuum boost.
Regards,
Al S.
1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.
Al S.
1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.
- kassim503
- Posts: 1027
- Joined: 18 years ago
- Location: Stony Brook, NY
OK ok, the 90's wranglers and jeep Cherokee sports dropped the electric booster, but the 80's ones had them.
I think the electric booster on the 80's Cherokees seem to include the brake proportioner as part of the assembly, and with everything it seems very bulky, ill get measurements whenever I get off my ass and venture out into the world
But just eyeballing it, the unit seems about a foot wide, 7 inches deep, and I think it had a 4 pin connector on it
Give or take it seems to be twice as complex looking as the GM unit Al put up earlier
I think the electric booster on the 80's Cherokees seem to include the brake proportioner as part of the assembly, and with everything it seems very bulky, ill get measurements whenever I get off my ass and venture out into the world
But just eyeballing it, the unit seems about a foot wide, 7 inches deep, and I think it had a 4 pin connector on it
Give or take it seems to be twice as complex looking as the GM unit Al put up earlier
'83 maxima sedan, l24e, a/t, black
227K SOLD 6/7/2012
227K SOLD 6/7/2012
- asavage
- Site Admin
- Posts: 5433
- Joined: 18 years ago
- Location: Oak Harbor, Wash.
- Contact:
Peugeot vacuum pump pictures here, as well as other vacuum pump discussion.zen wrote:do you get peugoet diesels in the states??they use an easy bodgeable belt driven vac pump..
Regards,
Al S.
1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.
Al S.
1982 Maxima diesel wagon, 2nd & 4th owner, 165k miles, rusty & burgundy/grey. Purchased 1996, SOLD 16Feb10
1983 Maxima diesel wagon, 199k miles, rusty, light yellow/light brown. SOLD 14Jul07
1981 720 SD22 (scrapped 04Sep07)
1983 Sentra CD17, 255k, bought 06Jul08, gave it away 22Jun10.
- asavage
- Site Admin
- Posts: 5433
- Joined: 18 years ago
- Location: Oak Harbor, Wash.
- Contact:
Add this one from evparts.com
evparts wrote:Most passenger vehicles built in the last 40 years use vacuum assisted braking. If your EV was originally manufactured that way, then it is likely to be hazardous if their functionality is not maintained. This Thomas vacuum pump is both quiet and efficient. Its 12VDC permanent magnet motor is rated at 1/10 HP. Vacuum performance is up to 22.9 in. Hg. We also include rubber shock mounts with threaded studs. Measures 7.34"L X 4.25"W X 4.7"H and weighs 4.5 lbs.
Note: Use with brake vacuum switch item number BK2785
Click here for Specs.
Price: $ 249.56
Weight: lb. 5.30
evparts wrote:This simple lightweight vacuum switch turns pump on only when needed. Adjustable vacuum setting. Has COM, NC and NO connections. The switch comes from the factory set with a cut off at 18 to 22 inches of mercury. The hysteresis is 15% to 20% of the 20 inches nominal so it's about 3 to 4 in/Hg
Contact Ratings: 4 amps @ 15 vdc, 1/2 amp @ 125 vdc
Measures 2.25"L X 1.5"W X 1.5"H and weighs 0.8 oz.
Price: $ 23.50
Weight: lb. 0.05
- asavage
- Site Admin
- Posts: 5433
- Joined: 18 years ago
- Location: Oak Harbor, Wash.
- Contact:
Reading a Dec-06 Northern Auto Parts catalog today (I'm a bit behind in my reading), I found a SSBC electric vacuum pump. It's no longer available from Northern (according to their website). Northern had it in their catalog last year for US$250. It's SSBC's No. 28146.
AutoAnything and Jegs have it for $280 now.
One sold on eBay recently for $180.
eBay seems to have a bunch of IRUNA electric vacuum pumps that looks substantially like the SSBC unit, at $100 a pop, which seems like a steal.
AutoAnything and Jegs have it for $280 now.
One sold on eBay recently for $180.
eBay seems to have a bunch of IRUNA electric vacuum pumps that looks substantially like the SSBC unit, at $100 a pop, which seems like a steal.
-
- Posts: 121
- Joined: 17 years ago
- Location: Greenville South Carolina
I recently worked on a 1992 F-700 that had an electric booster with pretty simple wiring. Its probly too big for the 720 but if anyone sees one of those trucks in the JY it might be worth looking into. That part may be a little rare though as most of those trucks seem to have air brakes.
1992 nissan pathfinder 4x4
1985 KC 720 4x4
1982 KC 720
1985 KC 720 4x4
1982 KC 720
- ecomike
- Posts: 242
- Joined: 18 years ago
- Location: Houston Tx
Re: turbo and vaccum
Al,asavage wrote:No.bacho wrote:If I mounted a vacuum line on the intake of the turbo would this creat enough for the brakes?
If Nissan could have left off the vacuum pump, I think they would have
There is insufficient vacuum at the intake manifold to operate the brake booster.
I was surprised to read your statement saying it has insufficient vacuum at the intake of the SD22. Are you saying the vacuum pressure is insufficient or the volumetric flow rate, capacity is insufficient. I can see the pneumatic governor and throttle body combo not wanting an additional air intake to run a vacuum brake booster, but I find it hard to believe the SD22 does not pull enough vacuum pressure to run a brake booster.
Regards,
Mike
1985 Jeep Cherokee Pioneer, 2WD, retrofitted with SD-22 & 5 spd manual trans, a 4X4 Gas Wagoneer ltd. (XJ) Jeep, 4.0 L w/ AW4 auto, and now 2 spare 2wd Jeeps, 87 & 89.
Mike
1985 Jeep Cherokee Pioneer, 2WD, retrofitted with SD-22 & 5 spd manual trans, a 4X4 Gas Wagoneer ltd. (XJ) Jeep, 4.0 L w/ AW4 auto, and now 2 spare 2wd Jeeps, 87 & 89.
- philip
- Deceased
- Posts: 1494
- Joined: 18 years ago
- Location: Southern California, USA
Re: turbo and vaccum
Mike: If the SD22 could provide vacuum on the average to keep up the brake booster .... don't you think Nissan would elimate those little oil/vacumm pumps?ecomike wrote:SNIP-.... but I find it hard to believe the SD22 does not pull enough vacuum pressure to run a brake booster.
The pneumatic governor can be moved the fuel rack full retarded by 5-6" vacuum. The engine would die.
TEST: Using one of those little MityVac's, and with the Mity's vent open, at engine idle speed, the reading was 8" vac. With the Mity's vent close, the vacuum reading passed 25" vac.
-Philip
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22
"Im slow and I'm ahead of you"
Passed 08May2008
My friend, you are missed . . .
1982 Datsun 720KC SD-22
"Im slow and I'm ahead of you"
Who is online
Users browsing this forum: No registered users and 1 guest