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Forum: Hot Heads Tech Talk

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on: Wed 31 of Dec, 1969 [23:00 UTC] reads:

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Spartacus67
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392 build help
on: Thu 15 of Aug, 2019 [19:42 UTC] score: 0.00
All,
I could use a little help building my 392 hemi. I have a 1958 392 Chrysler Hemi, the engine had a 671 Weiand on it but I purchased it without the blower. This is going into a street car but I still want some power with reliability.

It’s going in a 40 Willy’s steel coupe, I dont want to cut the firewall hence why I’m going naturally aspirated. I’d like to have a snappy street motor with great torque (2500-6000). I know I’ll have to put some new pistons (thinking 10:- or 10.5:1), hydraulic .505 cam. Already have msd ignition. I may get the hot heads aluminum heads but still deciding. Like to have 500-575 torque / hp where it falls. I’ll either run a single carb or 2x4s. Is this doable or am I asking too much?

Much appreciated.

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George
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Re: 392 build help
on: Sun 18 of Aug, 2019 [18:15 UTC] score: 0.00
I’m going naturally aspirated. I’d like to have a snappy street motor with great torque (2500-6000). I know I’ll have to put some new pistons (thinking 10:- or 10.5:1), hydraulic .505 cam. Already have msd ignition. I may get the hot heads aluminum heads but still deciding.

Apart from the HP question, 10:1 is a good CR for street cars, If you use alloy heads you'll need to bump it up 1 point to compensate for the better heat conductivity of the alloy. Ask Bob about the cam.

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DaveBlakeman
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Re: 392 build help
on: Sun 18 of Aug, 2019 [16:51 UTC] score: 0.00
Remember the sign in the movie Mad Max ? SPEED IS JUST A QUESTION OF MONEY -- HOW FAST DO YOU WANT TO GO?

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LeCake
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Torque spec Flywheel and transmission adapter
on: Tue 30 of Jul, 2019 [11:17 UTC] score: 0.00
Hi
I’ve been searching for torque spec for these Hot Head parts with no luck. Since these parts (flywheel, transmission adapter) are made of aluminum they should have another spec than the stock (gm in my case).

Does anyone know the spec for:

- Pressure plate to aluminum fly wheel
- Bellhousing to transmission adapter

It would be nice if torque spec and other instructions (for example how to connect the houses on the remote oil filter adapter etc.) where added to the product on the website. That would save some people some time.

Thanks????????

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bsgp8ntball
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How much oil in the valvetrain
on: Wed 24 of Jul, 2019 [16:53 UTC] score: 0.00
How much oil should I be seeing in my rockers and pushrods? I've attached a link to my hemi running. It's been 7000 miles since the last rebuild and I've made 50-ish passes at the track so it can't be all that bad but I got lots of comments from the chevy and ford guys because of how much oil they pump. Thoughts? The passenger side (shown in video) is less than the drivers side.

https://youtu.be/n1CjaXKoW3M

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George
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Re: How much oil in the valvetrain
on: Thu 25 of Jul, 2019 [13:26 UTC] score: 0.00
They don't flow anything like the modern engines. If you've gone 7K w/o ant squeeking you're probably good!

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bsgp8ntball
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Re: Re: How much oil in the valvetrain
on: Thu 25 of Jul, 2019 [15:56 UTC] score: 0.00
Thanks, that's what I assumed but after so much chatter I figured I had better at least ask. I've been able to find two other videos on youtube that look like similar oiling to mine.

> They don't flow anything like the modern engines. If you've gone 7K w/o ant squeeking you're probably good!

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bsgp8ntball
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Re: How much oil in the valvetrain
on: Wed 24 of Jul, 2019 [16:53 UTC] score: 0.00


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Mike83
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331 cam/compression question
on: Wed 24 of Jul, 2019 [01:08 UTC] score: 0.00
hey all. new to the forums and hemis in general. my buddies are building a 56 crusader (sorta) gasser. we have a 54 331, just looking to find opinions. we need a camshaft, and I'm interested in the hydraulic 485 lift cam from HH. my concern is if we have enough compression to pull it off. engine has old forged .030 flat tops in it. I gave the block a skim at work, but haven't touched the heads yet. from what I've read, should be a stock 7.5:1. don't want to have to buy new pistons if we don't have to. just looking for some oponioms/experience. this car won't be raced and is just meant to be a loud obnoxious cruiser:) thanks

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DaveBlakeman
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Re: 331 cam/compression question
on: Sat 27 of Jul, 2019 [16:24 UTC] score: 0.00
When choosing a cam I decide where I want the power ,upstairs or downstairs . Then I call Isky { nobody know more about cams . Isky tells me what cam I need for what I'm trying to do.

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George
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Re: 331 cam/compression question
on: Thu 25 of Jul, 2019 [13:33 UTC] score: 0.00
Probably should talk to Bob on the cam. milling block/heads affects the valve train geometry. I wouldn't do it unless necessary. While expensive changing C/R with different pistons is the way to go. It should be noted that advertised C/R has been found to be optimistic on measured engines.

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ron37
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KD500 Cam
on: Tue 23 of Jul, 2019 [17:04 UTC] score: 0.00
I have several 325 Dodge hemi engines. One is a KD500. Another has no markings where the ID should be. The KD500 has adjustable rockers and hydraulic lifters, while the unmarked one has adjustable rockers and solid lifters. All had 4 barrel carbs when I got them. A third engine has sodium filled valves, non adjustable rockers and hydraulic lifters. It is a truck engine. I have not torn down any yet. I was wondering if the KD500 cams are different from the other 325 cams. I am going to install a new hydraulic roller lifter cam and lifters in one of the engines. It should give lots of power and low end torque to 5000. Does anyone have any idea of what the KD500 cam has different from the other 325 cams both solid and hydraulic? I am going with 10 to 1 pistons in which ever engine gets the roller cam. I'm not sure about the others. I guess what I'm wanting to know is the horse power different on the 325's due to carburetion or carburetor and cam grind type. All to be used in mild street rods.

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RS16017
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4 Speed
on: Sun 14 of Jul, 2019 [20:27 UTC] score: 0.00
I've all but given up on finding a good A833 to put behind my 392. What other transmission would come closest to fitting my '67 GTX tunnel without a lot of fabrication? Would like to use the factory shifter hump in the tunnel if possible.

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ron37
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Re: 4 Speed
on: Tue 23 of Jul, 2019 [17:16 UTC] score: 0.00
I am going with a ow mileage Dodge 5 speed out of a 1997 pickup behind my mild 1957 325 Dodge hemi. It is an aluminum case. I think it will hold up and gives me the overdrive option. The late model hemi engines had a lot of horse power and torque and these transmission seem to hold up okay. It is just a thought or another option if you are just on the street and now running a super high horse power machine. Also if you break it, the local yards will have a spare for you.

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DaveBlakeman
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Re: 4 Speed
on: Mon 15 of Jul, 2019 [16:08 UTC] score: 0.00
How hard are you looking? There is one on eBay now for 350 bucks . I paid 300 for mine and picked it up locally . Not a rare transmission by any means.

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RS16017
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Re: Re: 4 Speed
on: Fri 19 of Jul, 2019 [02:38 UTC] score: 0.00
> How hard are you looking? There is one on eBay now for 350 bucks . I paid 300 for mine and picked it up locally . Not a rare transmission by any means.

I find lots of overdrive trannys but not many cast iron models for that price. Besides all the ones I see for sale look like someone found them in a junk pile and stuck a $600 price tag on them.

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erk_f-100
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ignition timing problems
on: Wed 03 of Jul, 2019 [19:25 UTC] score: 0.00
I have just put a 671 blower on my 331 hemi in a 1954 Ford F-100. The vacuum advance hose hits the manifold so so I had to loosen the distributor to get the manifold in Place. I have two problems. 1) How can I set the timing right when the vacuum hose hits the manifold. 2) How is it possible to get anything done back there??? No room to move anything. What has everyone else done to solve this problem??

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DaveBlakeman
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Re: ignition timing problems
on: Fri 05 of Jul, 2019 [18:31 UTC] score: 0.00
{ what Jack said } It does not have to be in that position to work .

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Jack
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Re: ignition timing problems
on: Thu 04 of Jul, 2019 [15:21 UTC] score: 0.00
Why don't you rotate the distributor to where it clears and move the plug wires accordingly.

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Lancerhemi
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270 Hemi water pump
on: Mon 24 of Jun, 2019 [14:49 UTC] score: 0.00
I have a 270 Hemi which I ordered your small block Chevy water pump adapter for. There are two different small block Chevy water pumps a short and a long. To use all my original pulleys and retain same distance for belts aligning and all, which pump do I use??


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