new wanderer.

G

g10van8772

Active Member
Hello all,

just signed up here, also part of the chevy talk forum. been up to elbows on cars for twenty years now, first was a 75 nova, right now it an 84 van. had many fun times, and large frustrations with my cars. Right now the project is to replace inline 6 250 with integrated intake in the van with a 305 v8. I've never built an engine before, and might not ever again, but wanted the experience. and I'm seriously hoping my skills are up for the challenge.
long.jpg

This is picture of the project right now.
 
FIRST ,WELCOME TO THE DATA BASE!

thank you for posting clear pictures thats a rather rare skill!

youll find the search feature here on the site and following sub linked info is highly educational and worth the effort!
if youve got questions post them, Ive got a large library and experiance of building well over 180 plus engines(I gave up counting years ago) and theres other guys on the site with similar experiance so we should be able to help
 
:D Welcome to Grumpy's Performance Forum, g10van! Looks like you've made a lot of progress with your engine build already. Wish you the best with your V-8 install.

Best regards,

Harry
 
Well not as much as I WISH I could take credit for. the crank, cam, pistons, rings and connecting rods were already in the block I acquired, the valves and springs were already on the heads. so that wasn't a whole lot of effort on my part. I think I'm at about the 25th floor in free fall still pointing out so far so good. will have to see what happens. Today finally had some divine influence smile on me. got fuel line bent and connected, no kinks or holes.

Here's how she looks as of this evening.

gettingcloser.jpg



Now for the long finicky manual removal of hair by the fistful. getting the emissions system put together, as well as electrically based sensors. once I have THAT then can TRY to fire her up. lol, if she does and sounds wonderful, I'll be doing backflips.
 
oh, before you guys ALL jump down my throat, the valve covers are on by gravity. Mainly there to keep as much dust etc..... out of the valves.
 
:D Looking good, g10van! Let us know how things go when you fire her up.

Happy Motoring,

Harry
 
lol, should I go into detail? like how many trucks responded, final $ amount of property damage, that kind of thing? or just keep to pass/fail summary?
 
:D Go into as much detail as you want, g10van. Always interested in engine specs, any mods and any parts interchange info. Its a gearhead thing.

Best regards,

Harry
 
Well, its been a month and have had to take a pause, but finally got around to boneyard visits, as well as getting some pieces bolted on.

Here she is this evening.

eng-no-fan.jpg


hung a couple fans on it as well to see the look
eng-blue-fan.jpg


slightly spruced up 5 blade

eng-many-blades.jpg


unaltered 7 blade

mainly was wanting to see the difference, see what you guys think.

it being in a NO A/C setup I'm fairly sure the 5 blade is good enough. but the 7 blade looks fairly cool too.
 
:D If both fans are the same diameter and each will fit properly within your fan shroud, go for the one that pulls more air.

Best regards,

Harry
 
well I think the 7 blade is an inch or two smaller diameter, can see it at the alternator. though both will fit the hub, and I think they are both identical on the depth. I gotta do some measurements anyways soon, I think the 305 is seriously shorter than the I-6. feeling so far, no numbers to check it against. basically would be ticked when I try to install and nothing would line up from engine to frame.
 
:D Yeah, I was wondering about that (fan dia.) FWIW, I scaled both fans based upon your photos and believe it or not, the longer blades of the 5-bladed fan appear (mathematically anyway) to be very near the same aggregate area if you measure width and length of the shorter blades of the 7-blade fan. So it shouldn't make a lot of difference in airflow when each is spun at similar RPMs.

Just install the V8 using OEM V8 engine mounts for a van such as yours and either scrounge a V8 fan shroud for your year van or if your existing radiator and fan shroud mount on the engine side (rear) of the radiator core support, install the fan that is the same diameter as your fan shroud opening and space your existing radiator and fan shroud rearward as required (this is easier done on some vehicles than others...... Simply picking up a V8 fan shroud for your year van from a wrecking yard or a dealer is probably your best option).

Hope this helps,

Harry
 
one factor not discussed yet is if there's a fan shroud behind the radiator and around the fan blades, because that's very important to increasing the fans draw efficiency, if the larger diam. fan just fits the shroud inside diam. it will significantly increase the draw efficiency over a smaller diam. fan mounted in the same location., ideally the fan diam. should be as large as the shroud clearances will allow (remember the shrouds solidly attached to the radiator but the engines tend to move a bit so there's some MANDATORY extra clearance necessary)
 
yeah, well at the moment I have an insanely thin radiator, like half the width of the hot boxes, whatever is stock with an I-6, and the shroud thats there looks more like its there to keep hands from hitting the fan accidentally. I'll likely be hitting junkyards for upgrade to both. Getting pretty good at finding stuff there thats in better condition than what I have at least. or at least a match for what I need.

I did do some measurements, and it looks like I'm gonna have about a 1" shift forward on transmission, and maybe 1-2 back for fan. this ought to be interesting.
 
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