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marc
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Posted: Thu May 29th, 2008 08:39 pm |
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Dave wrote: marc wrote:
Vero Steve wrote: Rev Limter is set at 6200 RPM. Peak torque is at 5250 RPM. Peak HP is at 5850. Dave you know as well as I a motor is a big air pump the more you can suck in the horsepower you can make. My heads have been seriously worked on the flow bench for max air flow. My motor has yet to break anything( Just shot myself in the foot with that comment) in the 35K I have put on it since I built it. It does run hotter than a stocker 88 but I run SYN oil and a cooler plus I installed a cooling fan where the horn nornally mounted for when I get stuck in traffic to keep air flowing over the jugs.......so far she's been real reliable and I still use the stock starter.....
Do you have any driveability problems operating at lower RPM's...I know a few guys that have high HP bikes but they do not run that great below 3,000 but above that they frickin fly...I know some of those cams will not run well in the lower RPM ranges...Love my 26G's... Real good question Marc. I noticed I've got to spool mine up a little higher when I take off from a dead start. The difference in the EV27 over the EV23 is slight. But, there is a difference... Yeah the EV 23's kick in at 1,800 and the 27's at 2,000 according to Andrews... My 24's kick in at 1,800 and are pretty strong up to about 5,000 where they start to crap out which is fine by me...I have absolutely no use for a cam that starts to kick in at 2,700 or 3,000 and is strong up to 6,000...I'm rarely up there...At 80 in 6th I am only turning 3,000...
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jeffy ole boy
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Posted: Thu May 29th, 2008 08:13 pm |
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Dave wrote: marc wrote:
Vero Steve wrote: Rev Limter is set at 6200 RPM. Peak torque is at 5250 RPM. Peak HP is at 5850. Dave you know as well as I a motor is a big air pump the more you can suck in the horsepower you can make. My heads have been seriously worked on the flow bench for max air flow. My motor has yet to break anything( Just shot myself in the foot with that comment) in the 35K I have put on it since I built it. It does run hotter than a stocker 88 but I run SYN oil and a cooler plus I installed a cooling fan where the horn nornally mounted for when I get stuck in traffic to keep air flowing over the jugs.......so far she's been real reliable and I still use the stock starter.....
Do you have any driveability problems operating at lower RPM's...I know a few guys that have high HP bikes but they do not run that great below 3,000 but above that they frickin fly...I know some of those cams will not run well in the lower RPM ranges...Love my 26G's... Real good question Marc. I noticed I've got to spool mine up a little higher when I take off from a dead start. The difference in the EV27 over the EV23 is slight. But, there is a difference... My 99 TC now has the gear drive 510 lift cams... They kick in real good starting at about 2200 rpms on up.....
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Dave
Supporter
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Posted: Thu May 29th, 2008 07:55 pm |
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marc wrote:
Vero Steve wrote: Rev Limter is set at 6200 RPM. Peak torque is at 5250 RPM. Peak HP is at 5850. Dave you know as well as I a motor is a big air pump the more you can suck in the horsepower you can make. My heads have been seriously worked on the flow bench for max air flow. My motor has yet to break anything( Just shot myself in the foot with that comment) in the 35K I have put on it since I built it. It does run hotter than a stocker 88 but I run SYN oil and a cooler plus I installed a cooling fan where the horn nornally mounted for when I get stuck in traffic to keep air flowing over the jugs.......so far she's been real reliable and I still use the stock starter.....
Do you have any driveability problems operating at lower RPM's...I know a few guys that have high HP bikes but they do not run that great below 3,000 but above that they frickin fly...I know some of those cams will not run well in the lower RPM ranges...Love my 26G's... Real good question Marc. I noticed I've got to spool mine up a little higher when I take off from a dead start. The difference in the EV27 over the EV23 is slight. But, there is a difference...
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marc
Supporter
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Posted: Thu May 29th, 2008 07:26 pm |
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Vero Steve wrote: Rev Limter is set at 6200 RPM. Peak torque is at 5250 RPM. Peak HP is at 5850. Dave you know as well as I a motor is a big air pump the more you can suck in the horsepower you can make. My heads have been seriously worked on the flow bench for max air flow. My motor has yet to break anything( Just shot myself in the foot with that comment) in the 35K I have put on it since I built it. It does run hotter than a stocker 88 but I run SYN oil and a cooler plus I installed a cooling fan where the horn nornally mounted for when I get stuck in traffic to keep air flowing over the jugs.......so far she's been real reliable and I still use the stock starter.....
Do you have any driveability problems operating at lower RPM's...I know a few guys that have high HP bikes but they do not run that great below 3,000 but above that they frickin fly...I know some of those cams will not run well in the lower RPM ranges...Love my 26G's...
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Dave
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Posted: Thu May 29th, 2008 07:22 pm |
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Wow, I've gotta believe that thing will pull your arms out of their sockets up around the rev-limiter... 
Probably shouldn't have said anything about the reliability...LOL
What frame is that in? That ain't your Dyna is it?
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Vero Steve
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Posted: Thu May 29th, 2008 06:48 pm |
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Rev Limter is set at 6200 RPM. Peak torque is at 5250 RPM. Peak HP is at 5850. Dave you know as well as I a motor is a big air pump the more you can suck in the horsepower you can make. My heads have been seriously worked on the flow bench for max air flow. My motor has yet to break anything( Just shot myself in the foot with that comment) in the 35K I have put on it since I built it. It does run hotter than a stocker 88 but I run SYN oil and a cooler plus I installed a cooling fan where the horn nornally mounted for when I get stuck in traffic to keep air flowing over the jugs.......so far she's been real reliable and I still use the stock starter.....
Dave wrote:
88-inch and 105/126?!?!?! Damn...
Sounds like they did some serious work on the ports and have a "decent" cam in it.
Just curious, what RPM is it makin' those numbers at?
Yeah, clearance issues are a big thing to consider when you change the ratio of the rocker arms. No question there.
I didn't even think to consider the need for added rocker arm strength on a basically stock motor though. But, in your case, I can see where you'd need it...
Empty, we all have enough (power) But, always lookin' for more!!! LOL... I know I am. But, reliability is a big issue for me...
That was the main reason I didn't do anything real crazy when I had mine rebuilt.
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Dave
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Posted: Thu May 29th, 2008 05:00 pm |
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88-inch and 105/126?!?!?! Damn...
Sounds like they did some serious work on the ports and have a "decent" cam in it.
Just curious, what RPM is it makin' those numbers at?
Yeah, clearance issues are a big thing to consider when you change the ratio of the rocker arms. No question there.
I didn't even think to consider the need for added rocker arm strength on a basically stock motor though. But, in your case, I can see where you'd need it...
Empty, we all have enough (power) But, always lookin' for more!!! LOL... I know I am. But, reliability is a big issue for me...
That was the main reason I didn't do anything real crazy when I had mine rebuilt.
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Vero Steve
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Posted: Thu May 29th, 2008 04:46 pm |
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Dave wrote: I was thinkin' that if you had your cylinders bored and then picked up a set of pistons, rings, etc. You could do it yourself for a fairly reasonable cost. It would still be reliable and I'd have to think, you'd more bang for your buck too...
Rocker arms aren't that big of a parasite when it comes to power. Best gain there (at least with a car engine & from what I remember) seems to be in the ratio. Larger ratio gives ya a bit more lift and duration. Thats true Dave but then you have to worry about the valve springs getting in a bind and that will also vary with the lift of the cam and the type of lifters used also. I used the Beehive type springs with Black diamond valves and had the heads ported by a guy that has a flow bench, he was really concerned with the seat height. Then shaved the heads 20 thousandths, Jims copper and steel head gaskets that are thin raised the compression a little more. Running pistons that are rated at 10.5 to one on the stock rods so I figure that I'm some where around 11 to 1, 11.5 to 1 compression with the stock bore. so technically I'm still at 88 cubes even though my Dyno'd out at 105 HP at 126 Ft-lbs torque. The roller rockers were my only choice for the extra strenght needed to support the rest of the engine, but they are the stock ratio or I would have had clearance problems
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empty
Supporter
| Joined: | Tue Jun 28th, 2005 |
| Location: | Plano, Texas USA |
| Posts: | 1658 |
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Posted: Thu May 29th, 2008 04:42 pm |
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Dave wrote: I was thinkin' that if you had your cylinders bored and then picked up a set of pistons, rings, etc. You could do it yourself for a fairly reasonable cost. It would still be reliable and I'd have to think, you'd more bang for your buck too...
Rocker arms aren't that big of a parasite when it comes to power. Best gain there (at least with a car engine & from what I remember) seems to be in the ratio. Larger ratio gives ya a bit more lift and duration. I saw J&P had 2 options for my bike in ratios. It has plenty of power, I just always want more.
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Dave
Supporter
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Posted: Thu May 29th, 2008 04:32 pm |
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I was thinkin' that if you had your cylinders bored and then picked up a set of pistons, rings, etc. You could do it yourself for a fairly reasonable cost. It would still be reliable and I'd have to think, you'd more bang for your buck too...
Rocker arms aren't that big of a parasite when it comes to power. Best gain there (at least with a car engine & from what I remember) seems to be in the ratio. Larger ratio gives ya a bit more lift and duration.
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empty
Supporter
| Joined: | Tue Jun 28th, 2005 |
| Location: | Plano, Texas USA |
| Posts: | 1658 |
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Posted: Thu May 29th, 2008 04:15 pm |
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Dave wrote: The roller rocker arm question got me wondering if there was something you could do to get more bang for your buck. $450.00 is a lot of money. Seems like you could get your cylinders bored and a set of 95-inch pistons for about the same price...
I could be completely wrong too. Might cost more than that...
The price tag is hefty, probably too hefty, I guess I was originally just curious as to whether you get as much out of a vtwin as a v8 with rollers.
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Dave
Supporter
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Posted: Thu May 29th, 2008 02:34 pm |
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The roller rocker arm question got me wondering if there was something you could do to get more bang for your buck. $450.00 is a lot of money. Seems like you could get your cylinders bored and a set of 95-inch pistons for about the same price...
I could be completely wrong too. Might cost more than that...
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empty
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| Joined: | Tue Jun 28th, 2005 |
| Location: | Plano, Texas USA |
| Posts: | 1658 |
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Posted: Thu May 29th, 2008 02:09 pm |
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Dave wrote: Empty, just curious, what's the specs on your engine? What have you already done to it? 88 inch TC, the only thing I have done inside the motor is gone to the S&S gear driven cams and adjustable pushrods.
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Dave
Supporter
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Posted: Thu May 29th, 2008 01:31 pm |
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| Empty, just curious, what's the specs on your engine? What have you already done to it?
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empty
Supporter
| Joined: | Tue Jun 28th, 2005 |
| Location: | Plano, Texas USA |
| Posts: | 1658 |
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Posted: Thu May 29th, 2008 12:10 am |
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marc wrote: marc wrote: empty wrote: Any ideas on price for an A motor? I will check my J&P catalogue when I get home. I went online but they only had prices for 1966 - 1984 and those were S&S priced at $486.00 S&S $452.99 and JIMS $449.99...They are compatible with stock HD rocker shafts... Yeah, I found that too. Been lookin' through the manual and it don't look like that big of a challenge.
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marc
Supporter
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Posted: Wed May 28th, 2008 11:47 pm |
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marc wrote: empty wrote: Any ideas on price for an A motor? I will check my J&P catalogue when I get home. I went online but they only had prices for 1966 - 1984 and those were S&S priced at $486.00 S&S $452.99 and JIMS $449.99...They are compatible with stock HD rocker shafts...
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empty
Supporter
| Joined: | Tue Jun 28th, 2005 |
| Location: | Plano, Texas USA |
| Posts: | 1658 |
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Posted: Wed May 28th, 2008 07:37 pm |
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Vero Steve wrote: Unless your running big cams with gear drive, there's no need to even consider roller rockers Jeff. I run them on my Dyna because of the big cams, high compression pistons, SE Valves and valve springs. And I didn't do it because of parasitic loss. I did it hoping not to break stuff. They were the toughest rockers I could find at the time.
PS they are noisy as hell............that and the whirrr of the gear drive.....LOL
I put in the biggest S&S gear driven cams that would fit without having to change out the rockers 2 years ago, I remember you mentioning the roller rockers at the time but I didn't have the spare money. I was just wondering if they help any like they do in a chevy V8. ...still thinkin' about it either way.
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Vero Steve
Supporter
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Posted: Wed May 28th, 2008 07:04 pm |
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Unless your running big cams with gear drive, there's no need to even consider roller rockers Jeff. I run them on my Dyna because of the big cams, high compression pistons, SE Valves and valve springs. And I didn't do it because of parasitic loss. I did it hoping not to break stuff. They were the toughest rockers I could find at the time.
PS they are noisy as hell............that and the whirrr of the gear drive.....LOL
Last edited on Wed May 28th, 2008 07:05 pm by Vero Steve |
marc
Supporter
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Posted: Wed May 28th, 2008 06:40 pm |
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empty wrote: Any ideas on price for an A motor? I will check my J&P catalogue when I get home. I went online but they only had prices for 1966 - 1984 and those were S&S priced at $486.00
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weasle
Supporter
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Posted: Wed May 28th, 2008 05:56 pm |
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| in a stock motor ?? probably not that much. 02.
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