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#1
02-15-2016, 11:16 AM
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Hi RPM Alum Block
Give me some particulars on what would make a great high winding Alum. Block Pontiac engine. Considering building one using my CV-1's and would like opinions on what would make a sweet high winding small cubic inch Pontiac....thinkin' around 440 cubes but am open to suggestions.
Thinkin' 'bout buyin' an Alum. IA@ currently on sale. |
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#2
02-15-2016, 11:33 AM
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4 x 4.25 = 453
3.75 x 4.25 = 423
__________________
1969 Firebird, Tx3-455/468 machined by CVMS E-heads by Dave Wilcox/Comp Cams 300B-6 flat solid 850DP on E-85 by Eric Niefert/T2 1" plastic spacer T-400/PTC 4000/390's/30x9 Hoosier radial slicks,#3400 1.38 60' 6.32 @ 108 MPH at Northeast Dragway NC 5/23/15 (9th pass on new engine) https://m.youtube.com/watch?v=ePCu2v...ature=youtu.be 1.37 60' 6.26 @ 109 half track, 9.86 @ 136 1/4 mile, #3350 11/26/16 at Richmond Dragway (125th pass on new engine) |
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#3
02-15-2016, 12:00 PM
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Higher winding:
4.35 Bore x 3.75 Stroke = 445 CID 
__________________
John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." Socrates |
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#4
02-15-2016, 12:00 PM
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Pickets short deck 428 goes thru the lights at about 10K.Makes 2.38 HP per CI.Tom
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#5
02-15-2016, 12:05 PM
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High winding suggest short stroke. And I'd keep the stroke at 4.0 or less so that the pistons stay up in the bore and don't get unstable at BDC.
JMHO, Eric
__________________
"Everybody has a plan until they get punched in the mouth" noted philosopher Mike Tyson Life begins at the end of your comfort zone. The mind, once stretched by a new idea, never returns to its original dimensions. |
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#6
02-15-2016, 12:38 PM
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4.31 x 3.75 - 438ci
I do not recall the specs on your CV-1's, also what intake are you considering using? How high is "high RPM" to you?
__________________
1994 Formula 535ci NA CV-1 - single 1050 with c14 - 940hp@7000/825tq@5200 Pontiac Powered 4th Gen Project Progress 
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#7
02-15-2016, 02:57 PM
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4.375 x 3.50 = 421 c.i. Traditional size, lots of rpm.
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#8
02-15-2016, 03:16 PM
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Dave billet only at those rpm?
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#9
02-15-2016, 04:26 PM
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4.25 x 4 = 453.94675 rounds to 454
4.255 x 4= 455.0154883 rounds to 455 4.32 x 4 = 469.0234368 rounds to 469 4.32 x 3.75 = 439.709472 rounds to 440 4.25 x 3.875 = 439.7609140625 rounds to 440 4.28 x 3.85 = 443.11385272 rounds to 443 IMO the 4.32 bore x 3.75 stroke 440 in a short deck would allow light piston with good ring placement and shorter rod help recip weight. In a std deck I'd do the 469" combo |
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#10
02-15-2016, 05:30 PM
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If you really want to wing this Pontiac up the RPM band, 8800+, I like Dave Wicox's 3.5" stroke. Not sure if you can run 4.375" in the aluminum block. That would leave .100 approx sleeve thickness. That's pretty thin. Some aluminum blocks will run as thin as .090" but keeping them straight and round may be an issue. I would try and stay around 4.325" bore myself. Like the 3.5" stroke though.
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#11
02-15-2016, 08:14 PM
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NSS high winder
Mine is a 505 that turns 8000 RPM and is very reliable. You can reduce the stroke to get the 440 you are looking for. Mine is the standard deck al. rod motor. I am very pleased with mine. Mine is the 2.0 HP per cubic inch motor. For reasons I choose, not to turn it to 9000 RPM to get the extra HP. But that could be done with different value springs. Hope this helps.
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505 KRE HP head 2x4 HP 1000s 60' 1.33, 5.78 @ 120.88MPH in 1/8 9.11@149.8MPH in 1/4 |
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#12
02-15-2016, 08:15 PM
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Oh is a KRE al. block.
__________________
505 KRE HP head 2x4 HP 1000s 60' 1.33, 5.78 @ 120.88MPH in 1/8 9.11@149.8MPH in 1/4 |
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#13
02-15-2016, 09:09 PM
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Quote:
The original Rodney Butler Twin Turbo IA-1 engine used a slightly bigger stroke (same forging) 3.6" and made 2885 HP with the thing. Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#14
02-15-2016, 11:46 PM
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Quote:
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#15
02-16-2016, 11:01 AM
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Quote:
__________________
EHTTFMF!  Being dead, it is not hard on you. You don't even know you're dead. It is hard on everyone else that is not dead. BEING STUPID WORKS THE SAME WAY! The rest of us suffer. |
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#16
02-16-2016, 11:11 AM
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Quote:
__________________
John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." Socrates |
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#17
02-16-2016, 01:24 PM
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Quote:
__________________
EHTTFMF! Being dead, it is not hard on you. You don't even know you're dead. It is hard on everyone else that is not dead. BEING STUPID WORKS THE SAME WAY! The rest of us suffer. |
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#18
02-16-2016, 03:03 PM
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Quote:
Bore = 4.35 Stroke = 3.75 ci = 445.85 rpm peak HP = 9500 ve @ peak HP rpm = 115% mass air flow 6455 lbs/hr Stan
__________________
Stan Weiss/World Wide Enterprises Offering Performance Software Since 1987 http://www.magneticlynx.com/carfor/carfor.htm David Vizard & Stan Weiss' IOP / Flow / Induction Optimization - Cam Selection Software http://www.magneticlynx.com/DV Download FREE 14 Trial IOP / Flow Software http://www.magneticlynx.com/DV/Flow_..._Day_Trial.php Pontiac Pump Gas List http://www.magneticlynx.com/carfor/pont_gas.htm Using PMD Block and Heads List http://www.magneticlynx.com/carfor/pont_pmd.htm |
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#19
02-16-2016, 09:04 PM
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Stan's numbers say you would make about 1070 HP at 9500 rpm. 445 cid engine. ~2.39 HP per cid
Tom V.
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#20
02-16-2016, 09:12 PM
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I have a flow sheet from Dave Bisschop @ SD Performance....but if I make it small enough to download onto this sight....it is to pixelated to read.
Last edited by Bnick166; 02-16-2016 at 09:49 PM. |
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