First time out since mods
Printed From: CorrectCraftFan.com
Category: General Correct Craft Discussion
Forum Name: General Discussion
Forum Discription: Anything Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=1430
Printed Date: December-04-2024 at 9:45pm
Topic: First time out since mods
Posted By: Jim_In_Houston
Subject: First time out since mods
Date Posted: April-09-2005 at 2:50am
I had the '68 (289 Ford Interceptor) out on Chocolat Bayou this afternoon for the first time since I added the GT-40P heads, the SpeedPro Cam, the Holley 450 CFM 4V, and the solid-state ignition conversion. It needs a little tuning but otherwise runs real nice. It planes a lot quicker and really scoots. The exhaust sounds about 2 octaves lower than before. It sounds like a real heavy breather. Interesting though, after about 30 minutes at about 1/4 throttle I decided to open it up. The secondaries came in and it felt real nice. After about 30 seconds at full throttle my girlfriend and I began to smell serious smoke. I shut it down, lifted the motor box expecting to see flames... ...saw nothing. Everything seemed OK. Tried it again, no smoke or fire. I guess it was something internal (in the rebuilt carb?) that just got cleaned out. I highly recommend the solid-state conversion if you are still running points. The other mods I made (above) are just options.
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Happy owner of a '66 and a '68 Mustang
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Replies:
Posted By: 882001
Date Posted: April-09-2005 at 3:02am
when we gonna run em? i may be out tomorrow and sunday? the smoke could be the new paint, oil and other burning off around exhaust port. have you changed the prop yet?
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kemah texas
http://www.correctcraftfan.com/diaries/details.asp?ID=163&yrstart=1986&yrend=1990 - 1988
skinautique "2001"
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Posted By: Jim_In_Houston
Date Posted: April-09-2005 at 12:51pm
I think the smoke may have been paint. I painted the whole engine. I replaced the prop before I ran the boat yesterday. I installed an OJ with a high amount of rake and large cups and a new prop shaft. It is still a 12 x 13.
My plan is to head back to Chocolate Bayou next week-end. They have a lift.
I'd need to do a little timing and carb adjustment. I doubt if my old water soaked '68 can keep up with your Nautique. It would be fun though. Nice looking boat.
I'll be in the bayou with no back floor or seat (to adjust the seals). I took on a little too water.
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Happy owner of a '66 and a '68 Mustang
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Posted By: captan1
Date Posted: April-09-2005 at 10:38pm
Jim, I did the same thing to my 351,, GT40P heads (nice upgrade), Mallory unilite (a must) and a Weiand aluminum intake. I only had it out once since because of constant rain here in California lately. I'm running a 13X14 Federal prop with no problem, if I was pulling people I might go down to a 13X13.
Is the SpeedPro cam you use the stock cam for your engine? I'm running a stock cam, wish I had a reverse blank to have ground somewhere. I like the performance too; it's nice just knowing there's some hot rod parts there anyway.
Those heads have bigger ports and smaller combustion chamber and the plugs are better situated in the head. I think it was worth the effort. I'm very pleased with the upgrades.
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http://www.correctcraftfan.com/diaries/details.asp?ID=452&sort=&pagenum=1&yrstart=1978&yrend=1978 - 1978 Ski Nautique
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Posted By: Jim_In_Houston
Date Posted: April-10-2005 at 12:05pm
Captan, what spark plug are you running? Determining what spark plug to run was the most difficult part of installing the heads. Try going into Autozone and ordering spark plugs for a 1968 boat with a reverse rotation Ford 289 and GT40P heads. That's a no-go.
The main reason I swapped heads is that I could not stand the thought of those little-bitty rinky-dink press-in rocker studs and the sloppy manner in which the rockers were held in alignment on the old Ford stock heads. It drove me nuts thinking about it.
I (and probably a lot of others) am struggling a little with converting my mental thought process to my hot-rod days of trying to get a small block to 6500 RPMs as fast as possible; to setting up to run at some unknown optimum RPMs continuously - it's different.
What are your wide-open-throttle RPMs? Do you run it wide open for extended periods?
The SpeedPro cam is it is a little "hotter" than stock. Someone on the forum recommended it to me and I am happy with it. It is made by Federal Mogul and is a reverse rotation designed for a 351. I bought it from Carolina Auto. A guy there named Jeff understands boats. It seems reverse rotation cam blanks for 289/302 engines are not to be found. The intake lift is .278 and exhaust is .283. Duration at .050 is 206/221. (This may be "stock" for a 351 - I dunno). I had planned to go to a hotter Comp Cam and I am glad now that I did not. The hotter cam would have resulted in higher idle speeds and I already have trouble idling through "no wake" zones. I get hollered at a lot. (But if they get real mad they probably can't catch me.) I can only go as slow as the engine can idle.
I found the heads to be a fairly easy "bolt-on".
Anyone reading this with points still in their distributor - Go install an electronic conversion NOW! You can throw the old point set under your seat for a backup if it makes you feel better.
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Happy owner of a '66 and a '68 Mustang
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Posted By: captan1
Date Posted: April-11-2005 at 3:49am
Jim, I went to sparkplugs.com to get the plug choice for a 1998 Ford Explorer, I can't remember off hand which brand I chose, and they might have been NGK.
The motor I have has about 800 hours on the block so I don't run it up to far, I doubt if it would hit 5000 rpm. Also 351 has 1/2 head bolts so you have to get the holes drilled out to 1/2, that only cost me $55. I'm looking forward to the summer to use it.
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http://www.correctcraftfan.com/diaries/details.asp?ID=452&sort=&pagenum=1&yrstart=1978&yrend=1978 - 1978 Ski Nautique
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