SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: electrowoman on May 31, 2008, 10:19:24 AM

Title: Indmar or Hardin logs?
Post by: electrowoman on May 31, 2008, 10:19:24 AM: Which Brand logs flow better? Does anyone know where flow testing may be posted?
Title: Re: Indmar or Hardin logs?
Post by: GT Jets on May 31, 2008, 10:28:12 AM: The best logs I have ever tested were marketed under the name Kodiak, they were built for Kodiak marine, but don't have a clue who actually built them, I know they performed as good as the water jacketed headers, but cost about half, and they were sexy too. i'll see if I can scare up the catalogue online.
Title: Re: Indmar or Hardin logs?
Post by: GT Jets on May 31, 2008, 10:33:27 AM: But of course Rexmar would have them! :-[

http://www.rexmar.com/page221.html (http://www.rexmar.com/page221.html) let me know your thoughts
Title: Re: Indmar or Hardin logs?
Post by: beerjet on May 31, 2008, 12:36:49 PM: Quote from: GT Jets on May 31, 2008, 10:33:27 AM
But of course Rexmar would have them! :-[

http://www.rexmar.com/page221.html (http://www.rexmar.com/page221.html) let me know your thoughts
Those technically arent logs . More of a minifold and at $1200 they arent very cheap .

If your lookin for performance , dont look at logs . The kodiacs would definatly be an upgrade but nothing like a true header . I've seen used water jacketed headers go for as much as those new manifolds go for . What do you have now .

-beerjet-
Title: Re: Indmar or Hardin logs?
Post by: hotrod56cars on May 31, 2008, 12:46:27 PM: Quote from: electrowoman on May 31, 2008, 10:19:24 AM
Which Brand logs flow better? Does anyone know where flow testing may be posted?

I seriously doubt if there is a difference between the 2 brands you're looking at/considering.
Title: Re: Indmar or Hardin logs?
Post by: GT Jets on May 31, 2008, 01:07:12 PM: Yeah you're right about them not being logs, sorry about that, but figured if EW was really going to look at performance this would be a good way to go, (I made an assumtion there), BTW these can be purchased directly from Kodiak, and if memory serves it would end up saving you about 25-30%,which is huge.
If your stuck with using logs, most are very similar, with the biggest differences in the risers, sometimes they choke down pretty tight, the amount of water sent through them make enormous differences, logs that sweep up above the exhaust centerline typically floww a little better, but can be hard to rig in most boats.

Again sorry for the assumtions :-[

Hot Boat magazine did an actual dyno. test a while back but could not find it. I really like the Hardins on our SBC, but it is pretty wild to start with. You know, overcammed, overcarbed, and abused.
Title: Re: Indmar or Hardin logs?
Post by: electrowoman on May 31, 2008, 01:47:43 PM: I went from the upward style to these logs for valve cover clearance. Hardin marine.
Title: Re: Indmar or Hardin logs?
Post by: electrowoman on May 31, 2008, 01:52:42 PM: I have a 77 Glastron Carlson CV 23 so over the top headers are out. The Stud girdle and roller rockers ruled out the upward exhaust..... Doesn't anyone make a decent log?

All I've seen were oldie's on Ebay. We did port the Hardin logs but 4 inch exits would be nice
Title: Re: Indmar or Hardin logs?
Post by: hotrod56cars on May 31, 2008, 02:01:35 PM: Quote from: electrowoman on May 31, 2008, 01:52:42 PM
... Doesn't anyone make a decent log? ...

No. It's inherent in the design for it to flow poorly.
Title: Re: Indmar or Hardin logs?
Post by: jim brock on May 31, 2008, 04:10:49 PM: it looks like you are talking ford???????? if so the best logs are from harman marine, they go by the name long bolts, i have a used set in stock, Jim
Title: Re: Indmar or Hardin logs?
Post by: electrowoman on May 31, 2008, 04:25:01 PM: Could you post a picture and what do you want for a set? What's the differance from what I have now?
Thanks.
Title: Re: Indmar or Hardin logs?
Post by: Luckie Stiff on May 31, 2008, 05:13:28 PM: Jim doesn't do pics, I'll be @ his shop on Friday so I'll take some pics of them when I'm there.
Title: Re: Indmar or Hardin logs?
Post by: electrowoman on May 31, 2008, 06:23:23 PM: Thank you, and ask him if he takes trade ins.... I'm going to have a manifold shop
here at the rate I'm going :)
Title: Re: Indmar or Hardin logs?
Post by: jim brock on June 01, 2008, 12:22:47 AM: call me on monday after 10.30am, 818-890-1867, Jim
Title: Re: Indmar or Hardin logs?
Post by: Blue on June 01, 2008, 12:29:32 AM: I have a nice set of Holman Moody's that are considered the "better" log out of some of the logs out there. They are a rare piece and I don't need em

(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fi95.photobucket.com%2Falbums%2Fl132%2Fswat2380%2F100_1905.jpg&hash=c413fda1ef63eea947d96cb941012dcb8bf3ac72)

(https://www.socaljetboats.com/proxy.php?request=http%3A%2F%2Fi95.photobucket.com%2Falbums%2Fl132%2Fswat2380%2F100_1906.jpg&hash=7b40c5a7def5bcbc6b967a31485fb533a9c5267d)
Title: Re: Indmar or Hardin logs?
Post by: electrowoman on June 01, 2008, 08:47:35 AM: What do you need for them, and are they 3" exits? I never heard of them making logs before.
They all look so close the same it makes you wonder if they used the same plans.
Title: Re: Indmar or Hardin logs?
Post by: COORS HEAVY on June 01, 2008, 11:27:11 AM: electrowoman are you trying to get rid of those manifolds? if so what would you want for them?
Title: Re: Indmar or Hardin logs?
Post by: electrowoman on June 01, 2008, 11:37:56 AM: I haven't decided what to do yet. I'm just trying to find the best flowing manifolds I can.
Once that happens I'll sell the rest. I paid $126 on ebay for the Hardin manifolds and the high risers are the one's that came on the boat. There is no brand name on them that I could see.