User Tag List
Results 271 to 285 of 740
Thread: Looper exhaust porting
-
02-04-2014, 12:05 PM #271
If I extend the divider a bit down into the liner, wouldn't that add low end? When you make a tuned pipe longer it would support a lower rpm, adding a longer divider would extend the tuner-length, question is will it support low end torque?
another question; considering the mods I've made(described in this thread) will I gain any power by removing the airbox baffle? Will jetting up to 74D be enough? I'm a bit tempted to mill the heads between 0,5 - 1mm, to add compression, but I feel a bit unsecure weather I need to jet up even more and perhaps even drop back on timing to prevent meltdown?! Is it worth it, will it give me actual gain when dropping timing etc?
Last edited by Captain75; 02-04-2014 at 12:52 PM.
-
02-06-2014, 04:47 AM #272Junior Member
- Join Date
- Nov 2012
- Location
- Finland
- Posts
- 8
- Thanks (Given)
- 0
- Thanks (Received)
- 0
- Likes (Given)
- 0
- Likes (Received)
- 0
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
How you drill it ?Do you have a pic?
-
02-06-2014, 04:51 AM #273Junior Member
- Join Date
- Nov 2012
- Location
- Finland
- Posts
- 8
- Thanks (Given)
- 0
- Thanks (Received)
- 0
- Likes (Given)
- 0
- Likes (Received)
- 0
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
-
02-06-2014, 09:06 AM #2745000 RPM
- Join Date
- Sep 2009
- Location
- iowa
- Posts
- 674
- Thanks (Given)
- 1
- Thanks (Received)
- 2
- Likes (Given)
- 5
- Likes (Received)
- 8
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
I have a pic somewhere. Can't seem to find it right now. I'll look later today.
1975 Hydrostream Ventura II
1987 evinrude 200xp
-
02-06-2014, 01:24 PM #275
-
02-07-2014, 03:15 PM #276
Lately, Its been hard to make this thread stay alive, but I will give it yet another post...
Boost- and fingerport timing; Very soon I will start the reasembling of my ported 2,7 described in this thread, just some last checks before final hone;
-Due to the fact that My motor isn't supposed to be a high revving screamer, shall I leave transfer and boost(and fingers)timing stock, meaning that mains open slightly before boost and fingers?
or should I make the all open at the same time?
-Do I need to raise compression beyond healthy stock(120psi) How much needs to be shaved?( I have 2 sets of fresh 2,7 heads)
looking forward to interesting replys!
-
02-09-2014, 03:49 PM #277
-
02-15-2014, 05:17 PM #278
Yep.
Al put fingers in a 2.7 block for me yrs ago and they looked factory. All were identical.
Monty does his w/a die grinder and they also come out amazing.
On the ball hones, I let a friend talk me into (against my better judgement) them and I ordered two different grits of high end hones.
My plan was to use them on stock rebuilds to give me a quick cross hatch and everything else to help champfer the ports which I still struggle with.
Yes it did a great job on a cross hatch.
Then I put a bore gauge in the cylinders to check them and never used them again. If you have wear areas in your bore, it will surface them but also open them.
Mac makes a good rigid hone and you can get all various grit stones. I will say though, to get a straight bore after honing, you need to be good and you need to be anal.I'd rather be competitive w/junk I built in my garage than win w/stuff I bought.
I refuse to allow common sense to interfere w/my boat buying decisions.
Checkmate 16' 140 Johnson
Hydrostream 17' Vector FrankenRude I
Laser 480 (?) 21' w/GT 200
Glastron Carlson Conquest w/XP 2.6
Glastron Carlson CVX 20 w/XP 2.6
24' Sonic w/twin 250 Johnsons
24' Sonic w/twin 250 HO Johnsons
19' STV River Rocket w/FrankenRude II
Allison XR 2002 w/Frankenrude II
Hydrostream 18' V-King w/Frankenrude II
-
02-15-2014, 06:08 PM #279
I used to use these bits that were hard rubber spheres with some kind of "diamond dust" impregnated in them that fit in a dremel. I have no idea where to find them or what they are called. There was 250 of them on e-bay and I bought the whole lot 8-10 years ago. I'm down to my last half dozen and they are the sh*t for dressing port edges.
-
02-15-2014, 06:22 PM #280I'd rather be competitive w/junk I built in my garage than win w/stuff I bought.
I refuse to allow common sense to interfere w/my boat buying decisions.
Checkmate 16' 140 Johnson
Hydrostream 17' Vector FrankenRude I
Laser 480 (?) 21' w/GT 200
Glastron Carlson Conquest w/XP 2.6
Glastron Carlson CVX 20 w/XP 2.6
24' Sonic w/twin 250 Johnsons
24' Sonic w/twin 250 HO Johnsons
19' STV River Rocket w/FrankenRude II
Allison XR 2002 w/Frankenrude II
Hydrostream 18' V-King w/Frankenrude II
-
02-15-2014, 06:27 PM #2815000 RPM
- Join Date
- Feb 2002
- Location
- Waukesha,Wi
- Posts
- 226
- Thanks (Given)
- 0
- Thanks (Received)
- 0
- Likes (Given)
- 0
- Likes (Received)
- 0
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
Listen to whatever RACER tells you he is one of THE BEST!!!
-
02-15-2014, 08:44 PM #282Scream And Fly VIP
- Join Date
- Jul 2013
- Location
- California
- Posts
- 1,556
- Thanks (Given)
- 21
- Thanks (Received)
- 63
- Likes (Given)
- 83
- Likes (Received)
- 294
- Mentioned
- 0 Post(s)
- Tagged
- 0 Thread(s)
They are Cratex abrasives. Used to be made in the same town as my old shop then moved.
Here's a link to the website and you can still find them on ebay.
http://www.cratex.com/
-
02-15-2014, 09:16 PM #283
They used to make some great abrasive impregnated rubber sticks.
Ló fasz racing
Joe Horvath
-
02-25-2014, 07:54 PM #284
How close are you getting captain?
-
02-26-2014, 06:15 AM #285
Close to start?
I'm cleaning piston ring grooves and chamfering port edges, recieved a package from the US yesterday containing new rings, seals and gaskets.
Having a hard time changing the lower crankshaft seal, anyone who can help with the procedure?
Next steps towards reassembly are honing and cleaning the block(I think I will use our bathtub when the Mrs is out..)and checking ring gaps, however I'm not familiar with the procedure.