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350 buildup
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harmon4127
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Joined: 05 Mar 2012
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Location: New richmond WI
919.72 points



PostPosted: Sun Mar 11, 2012 11:46 pm    Post subject: Reply with quote

also we didn't hear any valve float on the dyno,
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harmon4127
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Location: New richmond WI
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PostPosted: Sun Mar 11, 2012 11:55 pm    Post subject: Reply with quote

Comb Chambers: 58cc
Intake Valve Dia: 2.02”
Intake Port volume: 210cc
Intake Port Dim: 2.247” x 1.218”
Int Port Location: Stock
Intake Gasket: Fel-Pro# 1206, Some intakes require a Fel Pro 1266 intake gasket, or 1255 if using Vortec intake.
Exh Valve Dia.: 1.600”
Exh Port volume: 70cc
Exhaust Port Dim: 1.356” x 1.420” w
Exh Port Location: Stock location & bolt pattern
Exhaust Gasket: Fel-Pro# 1405
Flow, Intake: 264cfm @ .700” lift / 28”
Flow, Exhaust: 152cfm @ .700” lift / 28”
Head Bolts: Must use extended reach with true head bolt washers or head studs. See our other listings for accessories.
Head Studs: PC-2451-STUDS (12pt)
Manifold: MOST ANY
Milling: Min. Down to 58cc = .060” (.0065” = 1cc) Flat Mill
Pistons: Most 23°aftermarket pistons.
Push Rod length: Stock thru +.100” Should always measure (Stock length = 7.800”)
Push rod Guide Plate: Flat or raised, included.
Retainers: Steel 10°
Spark Plug: Angle or straight, .750” reach, gasket, Autolite 5224 or equivlent.
Spring Pockets: 1.550” OD (.030” deeper max)
Springs: Our Assembly: 1.44 outer diameter. single with a damper for hyd. flat tappet cams. setups are available for hyd. roller cams.

Valve Length: 5.015” (+.100”) (STD 4.890” w/1.437)
Valve Stem Dia: .3415” - 11/32”
Valve Train: STD SBC 3/8” or 7/16” stud mount
Valve Guides: 1/2” OD Int = Mag-bronze Exh = Phos-bronze (.002” press)
Valve Guide length: 1.950”
Valve Guide clearance: .0014” - .002” (with our .3415 dia. valve stem)
Valve Guide Spacing: 1.890” moved .030” from stock
Valve Seats: Hardened Ductile Iron, .006” press
Valve Seat dim. Standard
Valve Seat angles: Int = 32° - 45° - 60° - 70° Exh = 37° - 45° - radius
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af2
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Joined: 01 Sep 2003
Posts: 5558
Location: grassvalley, ca
71227.76 points


1933 Willys Coupe

PostPosted: Mon Mar 12, 2012 1:04 am    Post subject: Reply with quote

harmon4127 wrote:
also we didn't hear any valve float on the dyno,


Really? You will not see the valves bouncing off the seats And when you "hear" it it way to late. WOW! Just going on.

You will see it as a bigtime laydown on any dyno. And it needs to be fixed. That is all.
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squeeezer
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Location: new richmond WI
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1991 Chevrolet Camaro

PostPosted: Mon Mar 12, 2012 12:07 pm    Post subject: Reply with quote

Valves are most likely bouncing on the seat from lack of control @the spring due to mass harmonics or both
This being said......
i still wouldnt expect more than 5800to6000 rpm redline @ best with a flat tappet hydraulic
i havent touched a flat hydraulic since 2000,they are for stock rebuilds imo
If you have the $$$$$parts go to a hydraulic roller
if you dont go flat solid forperformance(with periodic lash adjustments)
either way get good lifters and springs
then you will have the performance im sure you are expecting
My parts are getting low but i do have some stuff that will help

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harmon4127
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Joined: 05 Mar 2012
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Location: New richmond WI
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PostPosted: Mon Mar 12, 2012 5:05 pm    Post subject: Reply with quote

today i called skip white they wanted me to do a compression test and leak down test. drivers side compression 150 155 185 175 pass side 160 160 180 155 Leak down % drivers side 20 25 80 25 pass side 30 30 22 30 %
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Paul P
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Joined: 15 Aug 2002
Posts: 2403
Location: Townsend, Mass.
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1971 Chevrolet Chevelle

PostPosted: Mon Mar 12, 2012 7:04 pm    Post subject: Reply with quote

Looks like you have some issues in both tests.

Where did you hear air leaking when doing the leakdown test? You have to listen to the Intake, Exhaust and Crankcase for air to know where the problem is. 80%?????

Compression does not look right either...

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2001 Focus 2.0 Zetec
stock cams, bolt-ons and tune
15.63@87 MPH 1/4mi

1971 - Chevelle 408 SBC N/A
6.86@102.5 MPH 1/8mi
10.78@122 MPH 1/4mi
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harmon4127
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Location: New richmond WI
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PostPosted: Mon Mar 12, 2012 7:21 pm    Post subject: Reply with quote

crankcase sorry forgot to mention that
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harmon4127
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PostPosted: Mon Mar 12, 2012 8:48 pm    Post subject: Reply with quote

skip told me the valve springs should be just fine
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af2
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Posts: 5558
Location: grassvalley, ca
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1933 Willys Coupe

PostPosted: Mon Mar 12, 2012 10:38 pm    Post subject: Reply with quote

harmon4127 wrote:
should be just fine


That is the quote of the week.
Not trying to ball bust you but that is absurd.
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squeeezer
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Location: new richmond WI
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1991 Chevrolet Camaro

PostPosted: Mon Mar 12, 2012 11:30 pm    Post subject: Reply with quote

Looks like you have some work ahead of you
What do you want out of this engine/ car?

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harmon4127
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Location: New richmond WI
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PostPosted: Mon Mar 12, 2012 11:52 pm    Post subject: Reply with quote

im going to redo the cylinder leak down test on 5 again tomorrow maybe it was not at tdc so after i redo it im going to try to get ahold of skip whites tech guy. i ran the tests this morning and tried calling them back leaving messages and never hear from them. I have a good 400 short block i could put my HCI on but with 58cc heads i think the compression would be way too high for pump gas. I'm looking for a 400hp and up street but mostly strip car
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harmon4127
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Location: New richmond WI
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PostPosted: Tue Mar 13, 2012 1:02 am    Post subject: Reply with quote

I just got the heads off this 400 and there dished pistons so i think im going that route. Set the 350 aside for now and have it rebuilt another day.
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squeeezer
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Joined: 02 Mar 2007
Posts: 2427
Location: new richmond WI
191524.76 points


1991 Chevrolet Camaro

PostPosted: Tue Mar 13, 2012 12:29 pm    Post subject: Reply with quote

what about those rings
and bearings for that matter
is it a 4 or 2 bolt main 400?
511, 509, 817 block?
what do the thrust sides of the bores look like?
i bet the 400 will cost more to freshen up

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harmon4127
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Location: New richmond WI
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PostPosted: Tue Mar 13, 2012 2:59 pm    Post subject: Reply with quote

removed #5 piston found that both compression rings were installed with the openings next to eachother. Wow this thing has been wrong for years nice.
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squeeezer
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Location: new richmond WI
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1991 Chevrolet Camaro

PostPosted: Tue Mar 13, 2012 3:06 pm    Post subject: Reply with quote

still will not fix the failing comp. test
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