Thinking of switching from M1 single plane to LD340 but LD340 would need to be milled to fit. Is it worth it?

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for real find a set of x or true heads j sorry we old and know at 7k they work . promass
I'd say try it but the only problem I see is you got to mill it to fit.

Do not hit the "Report button" unless there is a serious issue you want the staff to know about. Use the reply button on the right to respond.
you are the odd the 340 x and j ar old but i have a aar motor i can worry why they ar old i have. i have good worth ks we and i are cranking motors now . now mine are hi dollar.
 
for real find a set of x or true heads j sorry we old and know at 7k they work . promass



you are the odd the 340 x and j ar old but i have a aar motor i can worry why they ar old i have. i have good worth ks we and i are cranking motors now . now mine are hi dollar.
Charles, if you hit the "report" button one more time your account will be deleted. Understand? When you hit the report button the only people that see your comment are moderators and the website owner. Reports are only for website and member issues. They are not for your comments. Understand?
 
Charles, if you hit the "report" button one more time your account will be deleted. Understand? When you hit the report button the only people that see your comment are moderators and the website owner. Reports are only for website and member issues. They are not for your comments. Understand?

I almost (this ><close) hit the report button on this post.

Almost.

Then I decided i better not poke that bear, regardless of how much fun it might be...
 
IMHO, if that engine picks up with a dual plane, something else is wrong with it. All of the 4" engines I've been around didn't need any extra bottom end.
I didn't feel that it needed any more bottom end. It was more of a question as to whether there might be any benefits over the single plane intake I had on it at the time. The engine is good.
 
I'd rather use a vic340 w/7 /16 spacer blended aka used in the plenum development.
The m1 is nice, but it does better AS IQ52 SHOWED US IIRR by machining a plenum insert/spacer that equalizes the shape toward a square bore carb.

That manifold was developed with/for a spread bore carburetor. Be it flow or distribution issue... the issue exists.

Ty.
 
I'd rather use a vic340 w/7 /16 spacer blended aka used in the plenum development.
The m1 is nice, but it does better AS IQ52 SHOWED US IIRR by machining a plenum insert/spacer that equalizes the shape toward a square bore carb.

That manifold was developed with/for a spread bore carburetor. Be it flow or distribution issue... the issue exists.

Ty.

Gotta agree with this. Being that the M1 was an upgraded copy of the Holley Strip Dominator and retaining the spreadbore carb pad for ease of the regular guy to just swap on the TQ and class racing that demanded the stock carb be used, it’s not a bad intake at all. The Edelbrock Victor is just simply better though.

I had Pittsburghracer port my M1 single plane with good results.
He said he never ported one before and was impressed with the intake. Considering its age and design of yesteryear, it did pretty good.

The hardest thing about wet fuel intakes is and always will be fuel distribution. The MoPar engines book has tips to help this for the as cast intake. But it does stipulate that the mods are for use with a 750 Holley. Everyone should keep that in mind. Once you take the grinder to it, all bets are off and flow testing of each port is on. Let’s face it, while your there & if you have the ability, flow testing each port for the maximum benefit and return should be done.

For the average guy, way to expensive to do. A huge PIA for the ported. Results will vary depending on engine build, so predicting power out comes and gains is impossible. Or close to it.

Overall, the M1 (and the Holley Strip Dom) is a good intake.
 
A question on the motor: what Autotech pistons did you use? Were they shelf pistons or custom? How did you like the parts?
 
Charles, if you hit the "report" button one more time your account will be deleted. Understand? When you hit the report button the only people that see your comment are moderators and the website owner. Reports are only for website and member issues. They are not for your comments. Understand?
I can't find Charles' account. Did you delete it? I don't know if you remember, but Charles is a stroke survivor. He had a pretty bad one several years ago and has problems communicating.
 
A question on the motor: what Autotech pistons did you use? Were they shelf pistons or custom? How did you like the parts?
Here's a photo showing the pistons and pins I used. Really nice pieces. These got me to around 10.5:1 compression. I went with a Molnar crank and connecting rods.

Pistons.jpg

IMG_20180712_152101533_HDR.jpg
 
Just following up to say that I ended up using the LD340 intake. I got everything back together and running good and then I installed a GearVendors Overdrive which I'm absolutely loving!

20240527_211830.jpg

20240625_124717.jpg
 
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