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Keihin carb swap from petroworks? Got it installed. Now the test drive.

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Offline daddyizzle

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Keihin carb swap from petroworks? Got it installed. Now the test drive.
« on: September 18, 2007, 06:34:41 PM »
I was thinking about fuel injection but since I work alot of hours I thought maybe the Keihin 44 or 40 from petroworks might be an option. It boasts up to a 20 h.p gain and cleans up the engine compartment. ;D  A little pricey but not too bad.

Petroworks has nothing but good things to say about it (of course ::)) but I was wondering if anybody here actually is running it, and if it came pre-adjusted. Did it bolt right on? What's the mileage? How about the performance? Cold weather starts? ???

-Adam
« Last Edit: December 09, 2007, 04:26:44 PM by daddyizzle »
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86 Samurai Tin-Top stock with a Harley 44 sidedraft carb
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Offline Rhinoman

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Re: Anybody using the Keihin carb swap from petroworks?
« Reply #1 on: September 19, 2007, 05:09:46 AM »
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Mudjockey#1

Re: Anybody using the Keihin carb swap from petroworks?
« Reply #2 on: September 19, 2007, 07:43:51 AM »
I've been wondering the same thing!!!  I'm ready to buy one but I would like someones input on the product other than the creators.  I run a 32/36 weber now and it has issues!!!  But it is an old carb with a gasket rebuild.  so I might just need more parts or a new one.  I just keep tinkering!
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Offline daddyizzle

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Re: Anybody using the Keihin carb swap from petroworks?
« Reply #3 on: September 19, 2007, 10:13:50 AM »
I-Zook:
Quote
First impressions:I found that it had a very strong low to mid range. Top end did not show anything faster than stock, but getting there was pure enjoyment! The throttle response is something that you have to get used to. It is veeery responsive! Don't stomp the pedal unless you are already ready to shift. This kit will teach you how to drive again. {grin}

Petroworks:
Quote
Dyno tests showed that we had a 20+hp gain over a stock carburetor, and a 10hp gain over a well setup Weber carburetor.  Throttle response is instant, and power is felt throughout the power band.  On road we had a stock car doing well over 80mph on the freeway up an incline.  Off-road it is a dream, you can idle along at 900rpm and have plenty of on demand power to get over/up or through any obstacle.  We found our gas mileage ranged from 29 to 35mpg with normal freeway speeds, and around town stop and go trips.

Some similarities in both statements and some conflict. Hopefully we'll find somebody actually running one that can give their opinion. If it can get up to 80 pretty easily and hold it on an incline, heck that's good enough for me. ;D ;D


I may have to call   Petroworks and pick their brains. >:D >:D

-Adam
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86 Samurai Tin-Top stock with a Harley 44 sidedraft carb
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Offline daddyizzle

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Re: Anybody using the Keihin carb swap from petroworks?
« Reply #4 on: September 19, 2007, 10:44:00 AM »
I spoke to Robert at Petroworks. I think I want one.

This is my understanding of what I was told. Granted I've been up all night since 7 p.m and it's now 12:30 p.m. so I'll put it here so I can reference it in case I wake up and think it was a dream.


They discontinued the 40 rebuild and only  carry the 44 new. The tests were done on the 40. He says the perfomance is better with the 44 in that you still keep your power at the higher r.p.m.s
You lose some mileage if you romp on it but you do o.k. if you go easy. Powers there when you need it. He also said that I may just want to try this carb setup on my stocker without changing exhaust. He thinks I may like it well enough to not bother with a bigger exhaust or header etc. It's worth a shot.

I've already started saving  ;) ;)  8) 8)   Look out! :o :o

-Adam
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Offline mrfuelish

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Re: Anybody using the Keihin carb swap from petroworks?
« Reply #5 on: September 19, 2007, 04:57:57 PM »
These look way cool.    http://www.samuraiguy.com/
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Mudjockey#1

Re: Anybody using the Keihin carb swap from petroworks?
« Reply #6 on: September 20, 2007, 07:48:29 AM »
I had seen these to!!!  Any body running this setup!!!!  ???
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Offline daddyizzle

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Re: Anybody using the Keihin carb swap from petroworks?
« Reply #7 on: September 20, 2007, 09:58:01 AM »
Quote from: mrfuelish on September 19, 2007, 04:57:57 PM
These look way cool.    http://www.samuraiguy.com/


I wonder what that copperhead gasket is. Sounds like a long lasting head gasket. ??? ??? ???

I wonder what the deal is with the power glide adapter. I can make my sammy an auto with a power glide transmission? ??? ??? ???

As far as the mikuni sidedrafts, I have heard about them. My reservation is with the dual setup having to be synchronized. + you end up using 2 used carbs  I think where as the Petro kit comes with a new harley 44 carb. They stopped rebuilding the 40s because they couldn't meet the demand so they started going strictly 44's. $629 (I believe) so it's a little bit expensive. No one around where I live wants to work on a weber or a suzuki. But maybe if I needed carb work with the petro kit, I could go to the harley dealer. I'm sure they would like that 8) 8)


If anybody ends up calling petroworks, make sure you talk to Robert and tell him you were reading about it in this forum. Tell him some guy named Adam had already talked to him and was talking about it in this forum. Maybe they''ll give us a price break. ;D ;D

I may just buy one to be the first one here to try it and post it. $200.00 save up so far. :o :o ;) ;)

-Adam
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86 Samurai Tin-Top stock with a Harley 44 sidedraft carb
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Offline Drone637

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Re: Anybody using the Keihin carb swap from petroworks?
« Reply #8 on: September 20, 2007, 12:24:54 PM »
I have a Side Draft on my SJ-410.  Bit different engine, but I have never had it stall out on a hill because of fuel issues.  :)
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Offline Rhinoman

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Re: Anybody using the Keihin carb swap from petroworks?
« Reply #9 on: September 22, 2007, 10:41:58 AM »
In the UK the SU carb is used a lot. This is also a sidedraught vacuum type carb, a 44mm carb is the one that is used. It does give a good power increase over the stock item which is roughly equivalent to 40mm. That would seem to confirm what Petroworks are saying.

The 4 carb Mikuni set up looks pretty cool but I would have thought that the carbs were a bit on the large side for offroading, GSXRs use 38 or 40mm carbs IIRC. Synchronising the carbs isn't too difficult with a set of vacuum gauges but sealing them for a snorkel would take some work.

The Copperhead gasket looks exactly that, a copper head gasket. I've not seen one of those used on a modern vehicle, they were used on older vehicles and on some high performance engines. They need to be used with some sort of sealant to keep the oil and water where its supposed to be.
« Last Edit: September 22, 2007, 10:48:54 AM by Rhinoman »
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Offline daddyizzle

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Re: Anybody using the Keihin carb swap from petroworks?
« Reply #10 on: September 22, 2007, 06:58:32 PM »
I'm saving up and I think I'll try one of those carbs. If it works good, I'll sell of my stocker to some one in a smog control area since it has all the hoses and stuff. Might just need to be tweaked a little to meet emission standards.

If anybody goes to those other boards that I find hard to navigate and finds some more info on this carb setup, throw a link into this thread please.

Now for the copperhead gasket. Is there some kind of advantage to using one like never having your head gasket wear out?. I'm guessing they cost a bit so there must be something that the manufacturer thinks is special about them---or----there's a hell of a lot of copper in them :o :o and with copper prices being high, well, maybe that's why. ::) ::)

-Adam
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86 Samurai Tin-Top stock with a Harley 44 sidedraft carb
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Offline daddyizzle

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Re: Anybody using the Keihin carb swap from petroworks?
« Reply #11 on: September 30, 2007, 02:52:16 AM »
I found a link on related to this swap so I will try to post it here. Sounds like there are cheaper alternatives as always but maybe less headache with the petroworks kit which I will definitely take into consideration. I just want something I can bolt on and go without having to screw around with jetting and other alterations.

$250.00 saved up so far, I can almost taste it. :P :P

Here-s the link.

http://bbs.zuwharrie.com/content/topic,65932.0.html

-Adam
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Offline jason hutchison

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Re: Anybody using the Keihin carb swap from petroworks?
« Reply #12 on: October 06, 2007, 06:20:27 PM »
This Carb setup was unveiled at Moab this past april. It's a pretty clean set up and I know Gary has alot of time and money perfecting to run just right. It's slick. I don't have a sammi so I don't have any personal experience but I do know Gary at petroworks and he is pretty clever guy that only puts out tried and true products.


Thanks for the samuraiguy link.. I have never heard of them.. I will have to see what there all about!
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Offline brentd27

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Re: Anybody using the Keihin carb swap from petroworks?
« Reply #13 on: October 07, 2007, 02:34:58 PM »
I would be really leary of using a copper gasket on an Aluminum engine, particularly in the presence of coolant.  Copper and Aluminum produce a small electric current when they are touching and in the presence of watter.  This small electric current accelerates a chemical reaction between the two and the result is massive corrosion.  I've seen this happen with aluminum CPU waterblocks that have a copper "cold plate" that touches the CPU.  Generally, the seam where the copper and aluminum touch will corrode all the way around and the seal will fail.
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Offline daddyizzle

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Re: Anybody using the Keihin carb swap from petroworks?
« Reply #14 on: October 07, 2007, 02:49:56 PM »
Quote from: brentd27 on October 07, 2007, 02:34:58 PM
I would be really leary of using a copper gasket on an Aluminum engine, particularly in the presence of coolant.  Copper and Aluminum produce a small electric current when they are touching and in the presence of watter.  This small electric current accelerates a chemical reaction between the two and the result is massive corrosion.  I've seen this happen with aluminum CPU waterblocks that have a copper "cold plate" that touches the CPU.  Generally, the seam where the copper and aluminum touch will corrode all the way around and the seal will fail.

Good point. Just like the aluminum wiring in houses back in the early 70's. Aluminum and copper expand at different rates so the aluminum wiring would come lose at the connector and cause  a spark and fire. Corrosion too because of a chemical reaction. Something like that anyways. Maybe the copper head gasket is just a name and not really copper. Maybe it's a good gasket on an iron block and not on an aluminum block.

Back to the Keihin carb. I read the Zuwharri posts about it and found some interesting stuff there.

$350.00 saved and counting. 8) 8) :D

-Adam
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86 Samurai Tin-Top stock with a Harley 44 sidedraft carb
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