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#2421
03-09-2010, 11:53 PM
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We ended up with 415hp and 534tq. Len Caverly who owns the dyno felt there was a little more in it but we ran out of time and had to get it off the dyno. I want to thank Jeff Esmel(Shaker455ho), Len Caverly and John Goguen for all their help.
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1972 Trans Am white with blue deluxe interior 1974 SD Trans Am white with tuxedo interior, earliest known 74 SD vin# 1976 50th Anniversary Trans Am 1970 Judge ra3 4 speed pepper green 
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#2422
03-10-2010, 12:20 AM
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are those numbers with headers?
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#2423
03-10-2010, 01:02 AM
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That is a great street engine, HP is right on and torque is in the stump pullin' range..... I bet it is making great power at 3000 RPM also.....
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72 Bird |
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#2424
03-10-2010, 02:55 AM
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being that were on the subject, curious what the same engine w/ the HC-03 cam, super comps would put out. all else is stock. this is what I run in the 74. compression is up a little due to thin head gaskets and shaving the heads just to clean the surface. probably around 8.8-9ish :1. I read an article that has a build similar to mine (cam specs were off just slightly) and it was 450 hp/ 520 tq. I will say it makes my 79 w/ a 400, 62 heads, xe274 cam and 3.23 gears seem slow vs the 74 sd w/ DN 5 and 2.73 rears. both run 2.5" exhaust. Actually took the 74 out this weekend to clean out the cobb webs. This car never fails to produce thrills.
I'm looking for the short paper filter if anyone has one or knows of the pn. I can get the long one, but not the shorty. may simply change the filter housing snout if I cant get them and run the long filter. I took the brass chunk out and it runs much better. cant believe the guy I had do the carb said it was better. I knew he was full of it, but wanted to try it any way. that and along w/ other disappointments prevent me from ever calling or referencing him again for anything. |
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#2425
03-10-2010, 09:55 AM
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The engine was run on headers (my manifolds are cracked), compression must be close to stock, it has flat top pistons, heads are untouched, stock sd intake no port matching or anything, pretty much stock except for cam.
Now I'm sure there are better cams that make more power, but that wasn't what I was going for. It's not a pure stock engine or anything, just a show car. It was put on the dyno to basically break in the cam, check for leaks and make sure the bugs are were worked out BEFORE it went into the car and there were some. Like the brand new crane xr-i points conversion module not working out of the box! We got another one yesterday and it worked great. Hp/Tq numbers were just a bonus. Jeff and Lenny are great guys! I tried to scan the dyno sheet, but my scanner isn't working? Rpm Hp Tq 2800 269.1 502.0 2900 270.7 490.5 3000 292.0 510.3 3100 309.0 523.8 3200 318.8 523.4 3300 333.9 530.5 3400 345.5 534.8 3500 352.2 528.3 3600 363.7 530.4 3700 369.5 524.7 3800 378.3 522.5 3900 385.0 518.3 4000 391.2 513.9 4100 397.7 509.4 4200 401.8 502.6 4300 408.5 498.2 4400 403.9 482.6 4500 399.4 466.2 4600 398.4 455.1 4700 402.7 449.8 4800 410.7 449.3 4900 412.9 442.5 5000 415.1 436.1 5100 409.1 421.4 5200 408.4 412.3 5300 408.2 403.6
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1972 Trans Am white with blue deluxe interior 1974 SD Trans Am white with tuxedo interior, earliest known 74 SD vin# 1976 50th Anniversary Trans Am 1970 Judge ra3 4 speed pepper green
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#2426
03-10-2010, 10:26 AM
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Nice #'s Marc. Should be a great running SD T/A.
FWIW . . . With headers, your SD made very similar #'s that my HO made with stock 2.25" outlet manifolds. Mine made peak TQ of 530 @ 3000, and peak HP of 430 @ 5100. Of course, mine has had a bunch of cylinder head work, 10:1 compression and a small (232/235 @ .050") solid lifter cam.
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Regards, "455HO" Lloyd 2008 GMC Sierra Denali 2WD Crew, L92 6L80E, Silver w/ Ebony guts, 14.26 @ 98 
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#2427
03-10-2010, 10:53 AM
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Very nice numbers!
I figured if I lowballed the number, you get a great result out of reverse pschology! :-) |
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#2428
03-10-2010, 11:30 AM
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Quote:
Stay away from Fram, by the way.
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Regards, "455HO" Lloyd 2008 GMC Sierra Denali 2WD Crew, L92 6L80E, Silver w/ Ebony guts, 14.26 @ 98
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#2429
03-10-2010, 12:43 PM
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your numbers are real close to mine 8.9 to 1 .040 over with stock rods and replacement stock type pistons. Only difference appears to be port match on the head/intake, roller tip rockers and at the time a solid cam, 60 deg overlap, 110 lsa, 240 duration @ .050 and 4.95 lift. Pulled 419 @ 5200/// 520 @ 3550--torque numbers were already coming down at the point where we could get the good readings--really spiky under 3200 rpm. I've since changed up the cam, rockers, intake and carb, has more top end hp and less torque down low--and no, none of the original parts are for sale :~)
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#2430
03-10-2010, 08:57 PM
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Stock SD engines respond so well with a cam swap.
My old SD engine was a beast with the old HO Racing #HC-63(HC-03) cam and stock SD components.
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Home of WFO Hyperformance Shaker induction. |
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#2431
03-10-2010, 09:37 PM
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For "some" people it's not good enough. http://forums.maxperformanceinc.com/...d.php?t=626841
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1972 Trans Am white with blue deluxe interior 1974 SD Trans Am white with tuxedo interior, earliest known 74 SD vin# 1976 50th Anniversary Trans Am 1970 Judge ra3 4 speed pepper green
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#2432
03-10-2010, 10:24 PM
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Very good numbers for that combo!
It took many years for me to gather all the pieces for a real SD-455 so it's a novilty just to own one and a plus have it running!
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Carburetor building & modification services Servicing the Pontiac community over 25 years |
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#2433
03-10-2010, 10:30 PM
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Just curious, I assume your numbers are corrected horsepower and torque. Do you know what correction standard was used (SAE J606, J245, J1349 etc..) - For what it's worth, not all dynos and dyno numbers are the same! Thanks for sharing.
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Dick Winkles 1970 RAIV GTO 4-speed 1974 Original owner Z-28 4-speed 2008 SRT10 Viper Very Orange (was SD TA!) 2015 Challenger Hellcat 6spd (was SD TA!) |
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#2434
03-10-2010, 11:36 PM
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No Idea. Have to ask Len Caverly, it's his dyno. Seems consistant with what others have experienced though.
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1972 Trans Am white with blue deluxe interior 1974 SD Trans Am white with tuxedo interior, earliest known 74 SD vin# 1976 50th Anniversary Trans Am 1970 Judge ra3 4 speed pepper green
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#2435
03-11-2010, 12:40 PM
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Quote:
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#2436
03-13-2010, 04:42 PM
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Jeff Schneider Alliance, NE |
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#2437
03-13-2010, 05:02 PM
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Hmmmmmm............Michigan license plates but the auction says it's in New York?
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#2438
03-13-2010, 05:29 PM
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seller states that it's still titled in orig. owner's name, so never re-titled or registered. those are likely the original plates. Now if this thing is as claimed, probably should set the high mark for a 74. too bad it's an auto--and a 74 ;~)
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#2439
03-13-2010, 06:18 PM
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Quote:
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Bob Woodard Brighton, MI 2012 SRT8 Charger - 12.70 @ 111mph |
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#2440
03-13-2010, 07:54 PM
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I can tell you first hand....nothing wrong w/an auto 74!!! The car came from Michigan and went to Florida a few years ago. It sold on Ebay within the last 24 months as I was researching the orig tires. The plates are not original, they are plated Historical. Very Nice car and yes, I threw in a bid or two. JN
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