421 cube pulling truck engine

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randy331
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Re: 421 cube pulling truck engine

Post by randy331 » Wed Feb 07, 2018 12:08 am

CGT wrote:
Tue Feb 06, 2018 11:16 am
Any updates? Head flowz? Short block flowz? Perfect cam flowz? :?
Short block is ready to go together. Heads still need more work.
Been workin on a 468 BBC for a different pulling truck. It should be dyno ready by end of Feb.
Tryin to finish up a couple other projects.

Hope to have the engine dynoed and everything ready for a test hook or 2 before the IAMO points starts.

Randy

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Re: 421 cube pulling truck engine

Post by CGT » Wed Feb 07, 2018 11:23 am

I received some spy photos of the heads for the 468 awhile back. Is that one going to be dynoed as well? Everybody in Troy is looking forward to seeing Tommy Boy's replacement run on the dyno. (I assume the 421 remains unnamed at this point :? )

I didn't see where you posted cam specs, or maybe I missed it......or maybe its proprietary?

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Re: 421 cube pulling truck engine

Post by 77cruiser » Wed Feb 07, 2018 11:35 am

He's awaiting the Fbird consult. :twisted:
Jim

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Re: 421 cube pulling truck engine

Post by CGT » Wed Feb 07, 2018 11:37 am

77cruiser wrote:
Wed Feb 07, 2018 11:35 am
He's awaiting the Fbird consult. :twisted:
I think that consult is a given. Put a supercharger on it mounted to a tunnel ram with 4 quadrajets?

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Re: 421 cube pulling truck engine

Post by randy331 » Wed Feb 07, 2018 12:40 pm

CGT wrote:
Wed Feb 07, 2018 11:23 am
I received some spy photos of the heads for the 468 awhile back. Is that one going to be dynoed as well? Everybody in Troy is looking forward to seeing Tommy Boy's replacement run on the dyno. (I assume the 421 remains unnamed at this point :? )

I didn't see where you posted cam specs, or maybe I missed it......or maybe its proprietary?
Yes, the 468 will make a trip to the dyno. It should be ready by end of Feb. or first of Mar. Need to order a vacuum pump still, local suplier was out of stock on them. Trial fitting up intake and porting it some today.

421 remains un named so far.
Not sure Joe is lookin forward to me bringing more engines to Troy, he's probably tired of seein me out there. :)

Cam for 421 is 274-288-112 .462" intake lobe lift .442 ex lobe lift.
Comp cams lobes 1840 and 4082

Or was you asking about the 468 cam specs ?

Randy

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Re: 421 cube pulling truck engine

Post by Rick360 » Wed Feb 07, 2018 6:09 pm

CGT wrote:
Wed Feb 07, 2018 11:37 am
77cruiser wrote:
Wed Feb 07, 2018 11:35 am
He's awaiting the Fbird consult. :twisted:
I think that consult is a given. Put a supercharger on it mounted to a tunnel ram with 4 quadrajets?
:lol: :lol: :lol:

Rick

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Re: 421 cube pulling truck engine

Post by Keith Morganstein » Wed Feb 07, 2018 10:06 pm

CGT wrote:
Wed Feb 07, 2018 11:37 am
77cruiser wrote:
Wed Feb 07, 2018 11:35 am
He's awaiting the Fbird consult. :twisted:
I think that consult is a given. Put a supercharger on it mounted to a tunnel ram with 4 quadrajets?
If it will pass tech...
77BA26F5-CD25-403F-83C5-1D3B0968CC00.jpeg
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Automotive Machining, cylinder head rebuilding, engine building. Old school shop, semi-retired moonlighter. Can't seem to quit #-o

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Re: 421 cube pulling truck engine

Post by sjre » Fri Feb 09, 2018 9:15 am

Yes I would like to hear more about the bbc.

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Re: 421 cube pulling truck engine

Post by CGT » Fri Feb 09, 2018 10:04 am

Keith Morganstein wrote:
Wed Feb 07, 2018 10:06 pm
CGT wrote:
Wed Feb 07, 2018 11:37 am
77cruiser wrote:
Wed Feb 07, 2018 11:35 am
He's awaiting the Fbird consult. :twisted:
I think that consult is a given. Put a supercharger on it mounted to a tunnel ram with 4 quadrajets?
If it will pass tech...
77BA26F5-CD25-403F-83C5-1D3B0968CC00.jpeg
=D> =D> =D>

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Re: 421 cube pulling truck engine

Post by randy331 » Fri Feb 09, 2018 8:25 pm

sjre wrote:
Fri Feb 09, 2018 9:15 am
Yes I would like to hear more about the bbc.
It's for one of my son's truck pulling buddys. Mostly stuff he's picked up used. It's under the same rules as the 421 now cause the local group adopted IAMO pro street rules for this coming year.


It's 468 cube, Scat rods, stock 454 crank, in stock block. Has some dome trw pistons that will make it in the 12.3-1 compression range 1/16-1/16-3/16 rings I lowered the tension on.(maybe too much)LOL
781 casting heads I ported with 2.170 intake 1.850 ex Ferrea valves.
Brodix single plane intake with some porting and matched up to the heads good.
Comp cams 268*-280*-112* with .750 net intake lift and .720 net ex lift. Lobes are kinda slow cause valve weight is a little high. Nextec valve springs.
An 850 Baker carb.
Vacuum pump

Hope it runs good.

Randy

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Re: 421 cube pulling truck engine

Post by CGT » Fri Feb 09, 2018 8:58 pm

randy331 wrote:
Fri Feb 09, 2018 8:25 pm
sjre wrote:
Fri Feb 09, 2018 9:15 am
Yes I would like to hear more about the bbc.
It's for one of my son's truck pulling buddys. Mostly stuff he's picked up used. It's under the same rules as the 421 now cause the local group adopted IAMO pro street rules for this coming year.


It's 468 cube, Scat rods, stock 454 crank, in stock block. Has some dome trw pistons that will make it in the 12.3-1 compression range 1/16-1/16-3/16 rings I lowered the tension on.(maybe too much)LOL
781 casting heads I ported with 2.170 intake 1.850 ex Ferrea valves.
Brodix single plane intake with some porting and matched up to the heads good.
Comp cams 268*-280*-112* with .750 net intake lift and .720 net ex lift. Lobes are kinda slow cause valve weight is a little high. Nextec valve springs.
An 850 Baker carb.
Vacuum pump

Hope it runs good.

Randy
Is he limited to a 4150 carb?

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Re: 421 cube pulling truck engine

Post by randy331 » Fri Feb 09, 2018 10:16 pm

CGT wrote:
Fri Feb 09, 2018 8:58 pm
Is he limited to a 4150 carb?
No, he can run 4500, but the Baker 850 is what he has. Got it for a song and it seems to runs good.

I may bring something bigger just to test on dyno day, or try a dyno carb sitin at the shop.

I'd like a 4500 intake to try too, but not sure how long he wants to stay on the payment plan. :lol:

Randy

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Re: 421 cube pulling truck engine

Post by sjre » Sat Feb 10, 2018 8:33 am

Randy thanks for the specs.How high you plan to spin this?With those heads I cant see this making power above 6500.Wow I havent heard about baker carbs in quite a while!
Thanks Joe.

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Re: 421 cube pulling truck engine

Post by CGT » Sat Feb 10, 2018 8:36 am

My prediction on the 468. 620ftlb 660hp. Is there a consolation prize available if I'm wrong?

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Re: 421 cube pulling truck engine

Post by sjre » Sat Feb 10, 2018 9:00 am

My guess would be 680 range.You and Randy have the ability to exceed the predictions.

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