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Old 11-04-18, 11:26PM   #91
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Quote:
Originally Posted by thomas flaherty View Post
Is this your crankshaft Lou ? You finally sold it.
Pontiac guys are the cheapest MíFer in the world. lol
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Old 11-05-18, 11:35AM   #92
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"...two things, HO book is 30 years old. Old old Technology . The other I had my 3.25 main cast crank, cut down to 3.00 mains and welded. I had crankshaft specialist do it They hard chrome it. I had him do it with confidence because they are one of the best. They used to do all of Nunzi and Maxey's cranks.

My thing is having someone do it that has a track record, with a history of the cranks living. In a 650 hp motor. I think that's what's everyone trying to say.

P-Dude uses the shim and I believe olds bearing and has a history of success, here's the thing, by the time you have someone cut and weld it nitrate it or hard chrome it, it's just cheaper to go buy a steel crank.

My crank lived for 200 passes at 650 hp them broke two. Back then we had no other choices. If you feel confident that this guy can do it and not have any problems hey knock yourself out.

I just know guys who have with very poor success. If it was me I would go spend $650 and go buy a nice steel Crank, But that's just me, my theory is your taking a crank that God only knows how many miles are on it. How many times the motor it was in has been overheated, or detonated."

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Old 11-05-18, 11:57AM   #93
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650 HP out of a factory 3.75 stroke N crankshaft in a 406 is doable with today's camshafts
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Old 11-05-18, 12:25PM   #94
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Steve I still agree, if your building a roller cam motor with 12-14.1 compression and plan on making upwards 750-800 hp. Spinning it 6500-7500...thatís why I never used it.

But his is a pump motor maybe 500-550 hp shifting 5500-5800 rpms. With hyd cam. He got low compression motor.
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Old 11-05-18, 03:11PM   #95
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What the targeted bob weight of the pistons rods etc for this crankshaft. If I remember it cut down mains lighten and knife eage to about 69 lbs. correct me if I’m wrong. This could be a costly mistake if Rich has to add weight in balancing Next question who building this short block for rich or is it rich?? Because Rich has a history of doing things on the cheap (not picking on him) is he willing to pay for lightweight parts to make it work.
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Old 11-05-18, 05:25PM   #96
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Just to say Speed shop in Delaware is doing all the work, Just look for the guy who won Norwalk and took it all home.
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Old 11-05-18, 06:53PM   #97
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Just to say Speed shop in Delaware is doing all the work, Just look for the guy who won Norwalk and took it all home.
Whoís that ! Not that it matters
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Old 11-05-18, 08:28PM   #98
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Asked about a compression test, I warmed up the Gt0 125 degree,s, All plugs removed , Q-jet throttle wide open and here are my results: Not bad after 8 seasons: No1 180 No8 190 No4 180 No3 165 No6 170 No5 175 No7 170 & no 2 190 No 3 is questionable but really not that bad. I believe motor is coming out this winter. Its been a great ride, no complaints. Tons of fun. Hay ill need something else to fool around with next year.
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Old 11-05-18, 08:40PM   #99
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Grotonís Performance, Seaford, DE


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Old 11-05-18, 09:30PM   #100
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Asked about a compression test, I warmed up the Gt0 125 degree,s, All plugs removed , Q-jet throttle wide open and here are my results: Not bad after 8 seasons: No1 180 No8 190 No4 180 No3 165 No6 170 No5 175 No7 170 & no 2 190 No 3 is questionable but really not that bad. I believe motor is coming out this winter. Its been a great ride, no complaints. Tons of fun. Hay ill need something else to fool around with next year.
Itís definitely time, you really have 4 cylinders that are real low. Question is, is it rings or valve job. I think rings
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Old 11-05-18, 09:33PM   #101
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Grotonís Performance, Seaford, DE


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Never heard of him, but that doesnít mean anything
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Old 11-05-18, 09:50PM   #102
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Originally Posted by thomas flaherty View Post
What the targeted bob weight of the pistons rods etc for this crankshaft. If I remember it cut down mains lighten and knife eage to about 69 lbs. correct me if Iím wrong. This could be a costly mistake if Rich has to add weight in balancing Next question who building this short block for rich or is it rich?? Because Rich has a history of doing things on the cheap (not picking on him) is he willing to pay for lightweight parts to make it work.
Heís a low budget racer just having fun. I doubt heíd want to spend the money.
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Old 11-06-18, 02:48AM   #103
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Rich with that compression Iím surprised it ran that well. Go for it build your new motor
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Old 11-06-18, 07:14PM   #104
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Not doughting anybodys word here, thinking outside the box, i posted those once before and everyone seemed to say not to bad at all, 10-1 compression the things ive read if its within 20% of each other its ok. So may i ask should they all be close to 190 then?? You mentioned valve job. How can i tell if thats causing me the issue,s??
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Old 11-06-18, 07:50PM   #105
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Not doughting anybodys word here, thinking outside the box, i posted those once before and everyone seemed to say not to bad at all, 10-1 compression the things ive read if its within 20% of each other its ok. So may i ask should they all be close to 190 then?? You mentioned valve job. How can i tell if thats causing me the issue,s??
I just donít remember them being that far apart. At most 5 to 10#ís your off your 20#ís in 4 cylinders thatís bad. I think Thomas asked you a couple of times, what you ever did to resolve that problem, I think most thought it was a issue with the rocker balls being installed up side down, causing the valves in this cylinders not opening completely thus low compression reading in those cylinders.

Once you fixed that issue I donít think you ever did another compression test. If you had then I know I wouldíve said you definitely have a issue.
A leak down test will tell you were the leak by is,
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