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Discussion Starter · #1 ·
I have an saber cylinder that I am thinking of raising the port timings.

Its at 128-transfers 195 exhaust now....I was thinking of going 132 /198-200 when I get it replated.


Any of you other saber owners know what yours is set at?
 

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QUOTE (Kev @ Jul 26 2008, 10:56 PM) index.php?act=findpost&pid=6627I have an saber cylinder that I am thinking of raising the port timings.

Its at 128-transfers 195 exhaust now....I was thinking of going 132 /198-200 when I get it replated.


Any of you other saber owners know what yours is set at?

You should give more details about your setup if you want a more accurate assessment.
 

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what wight rider , whats it used 4 drag ,dune ,what fuel, stroke ,rod ratio ,blow down, transfer ports, squash all this and a few other things come in to play. make a port map and calculate every thing up. that is a good start
 

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Discussion Starter · #4 ·
QUOTE (Koolguyson @ Jul 27 2008, 02:32 AM) index.php?act=findpost&pid=6642You should give more details about your setup if you want a more accurate assessment.

It will be used mainly as a drag bike in the dunes.

70mm stroke billet crank-95 bore 496cc
cpc 48x58 carb...just converted to alky..not tuned in yet, FAT
v-force reeds
dyna box with custom saber curves from Calvin pollet.
shearer drag pipe
86 stock frame 8 over arm
2-4 override 15/36 gearing
200 lbs rider(tires)12ppl 72ro taller haulers. Just got a set of 80 ro 12 stag...havent tried the 80 yet.

I purchased this motor used in a basket case about two years ago from planet sand member.(madracing). Got it going about six months after that.

I did some research on the history of the motor. It was one of the first three out. Calvin Pollet told me Trinity Racing did this one. Not to bad mouth trinity but they are not known for the fastest motors. I was told it did 89hp on gas, but I find that hard to believe based on how it runs now. My brothers 350 banshee runs 4.2-4.3's 70+mph. This saber gets out mph'd racing it out in the dunes? I thought the saber should have pulled it on the big end? The saber is fat/rich because I just converted it to alky...Maybe after I get it dial in it might run better on top?

I know I need to take it to a track to get it dialed in, but based on from racing him it would be lucky if it ran a 4.5-4.6.

Before I put the motor back together last year I checked the port timmings. The boost port and transfers where at 128.. the exhaust was at 195 with the exh tripple ports a little lower.. The cylinder looks unported...The exhaust is polished and thats about it. I cant remmber exacty what the squish was , I think it was around .055. The port timings seem low for a drag motor...IMO

I am going to have the top end freshend up and was thinking of changing the port timming then. I should just send the top end to Packard and be done with it....

I know there is more than just port timings for a fast bke, but was just wondering what others are at while I have the cylinder off.
 

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QUOTE (Kev @ Jul 27 2008, 12:46 PM) index.php?act=findpost&pid=6683It will be used mainly as a drag bike in the dunes.

70mm stroke billet crank-95 bore 496cc
cpc 48x58 carb...just converted to alky..not tuned in yet, FAT
v-force reeds
dyna box with custom saber curves from Calvin pollet.
shearer drag pipe
86 stock frame 8 over arm
2-4 override 15/36 gearing
200 lbs rider(tires)12ppl 72ro taller haulers. Just got a set of 80 ro 12 stag...havent tried the 80 yet.

I purchased this motor used in a basket case about two years ago from planet sand member.(madracing). Got it going about six months after that.

I did some research on the history of the motor. It was one of the first three out. Calvin Pollet told me Trinity Racing did this one. Not to bad mouth trinity but they are not known for the fastest motors. I was told it did 89hp on gas, but I find that hard to believe based on how it runs now. My brothers 350 banshee runs 4.2-4.3's 70+mph. This saber gets out mph'd racing it out in the dunes? I thought the saber should have pulled it on the big end? The saber is fat/rich because I just converted it to alky...Maybe after I get it dial in it might run better on top?

I know I need to take it to a track to get it dialed in, but based on from racing him it would be lucky if it ran a 4.5-4.6.

Before I put the motor back together last year I checked the port timmings. The boost port and transfers where at 128.. the exhaust was at 195 with the exh tripple ports a little lower.. The cylinder looks unported...The exhaust is polished and thats about it. I cant remmber exacty what the squish was , I think it was around .055. The port timings seem low for a drag motor...IMO

I am going to have the top end freshend up and was thinking of changing the port timming then. I should just send the top end to Packard and be done with it....

I know there is more than just port timings for a fast bke, but was just wondering what others are at while I have the cylinder off. that sounds about right a saber cylinder out of the box on gas can make 80 + hp if tuned right
 

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it not always about port timing its about port angles, head design, and getting the right pipe to work on your motor with your set up...
 

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blaster man you just about hit the nail on the head, theres Little hp diff fond in a saber with changing the port timing. the exhaust port shape and transfer angles is a place on a saber you can fined some hp . but the most important thing is the pipe, above all on a saber i have found there can be 10-20 hp found in the right pipe and it loves alky .the more you give it the more it loves it .i run a 54 mm carb with 920 jet and 2 power jets all most maxed out i think the limiting factor is the reed cage in a saber, it cant flow enough for just about 100hp but there is no single reed cage made to flow any more but i have something to try just haven't got around to it yet.
 

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Discussion Starter · #8 ·
I just thought this thing would run stronger, From the seat it doesnt seem to pull any more than my 350r pro-x , just leaves harder. I would have thought it would have been a big difference but wasnt that big of diff.....

Im kinda disapointed how it runs for now....
 

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You need to get a hold of Nate McCoy, he has had his hands on many sabers and knows how to make them run. I would bet my pay check theres a ton more power in that thing, but theres a few things that need to be changed....
 

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QUOTE (Kev @ Jul 27 2008, 03:09 PM) index.php?act=findpost&pid=6711I just thought this thing would run stronger, From the seat it doesnt seem to pull any more than my 350r pro-x , just leaves harder. I would have thought it would have been a big difference but wasnt that big of diff.....

Im kinda disapointed how it runs for now....


First off you need to dyno it to CONFIRM what it is or isnt? Port timings are not the starting point!! Those specs actually sound pretty good. You might go with a little more exh port timing, but it completely depends on your pipe, and what your expected rpm peak is? 195 may already be too high for your expected rpm? If you go much higher on the xfers you WILL turn it into a big steaming pile.
 

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QUOTE (REDLINE @ Jul 28 2008, 10:14 AM) index.php?act=findpost&pid=6783First off you need to dyno it to CONFIRM what it is or isnt? Port timings are not the starting point!! Those specs actually sound pretty good. You might go with a little more exh port timing, but it completely depends on your pipe, and what your expected rpm peak is? 195 may already be too high for your expected rpm? If you go much higher on the xfers you WILL turn it into a big steaming pile.

yup get it on a dyno i would geuss it not making over 75hp with that pipe and ex timing...
 

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Discussion Starter · #12 ·
QUOTE (GPracerX @ Jul 28 2008, 04:31 PM) index.php?act=findpost&pid=6827yup get it on a dyno i would geuss it not making over 75hp with that pipe and ex timing...


75hp would be my guess too....In your opinion what ex timing would work with that pipe? I would have to guess 198-200. But that is just a guess, and thats why Im asking on here.

I know of singles with 130+ transfers that run hard...then some would say it wouldnt work...I guess everyone has different ideas what works for port timings.
 

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Kev, you could look into the ignition curves. I would bet that by going to alky you most likely will want to gain some additional timing advance in the mid to higher rpm's.
I know that McCoy's ignition tune up that I run is like a kick in the rear from the stock CR setting!
 

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QUOTE (Kev @ Jul 28 2008, 06:41 PM) index.php?act=findpost&pid=684675hp would be my guess too....In your opinion what ex timing would work with that pipe? I would have to guess 198-200. But that is just a guess, and thats why Im asking on here.

I know of singles with 130+ transfers that run hard...then some would say it wouldnt work...I guess everyone has different ideas what works for port timings.

With that first gen cylinder I don't think you could even go to 130* without running into the exhaust
 

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Discussion Starter · #15 ·
QUOTE (Koolguyson @ Jul 28 2008, 08:43 PM) index.php?act=findpost&pid=6862With that first gen cylinder I don't think you could even go to 130* without running into the exhaust

your right....They are close to the bottom of the exhaust ...probly have to play with port timing using a spacer plate and or thicker gaskets, then cut a custom dome.
 

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QUOTE (Kev @ Jul 29 2008, 06:31 AM) index.php?act=findpost&pid=6871your right....They are close to the bottom of the exhaust ...probly have to play with port timing using a spacer plate and or thicker gaskets, then cut a custom dome.

ya they are close i would space it up and use a min of 200ex
got to get some good domes and ignition timing right too..
 
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