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#21
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Compression the same? Heads same except new?
If those are same and basically just the cam change I'll guess 940-950 |
#22
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New steel rods? Did you have Aluminum rods previously?
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#23
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Hi Steve.... That 113 is the intake centerline
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#24
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117 LSA on the cam. I'll say 1020 HP.
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62' Lemans, Nostalgia Super Stock, 541 CI, IA2 block, billet 4.5" crank, Ross, Wide port Edelbrocks, Gustram intake, 2 4150 style BLP carbs, 2.10 Turbo 400, 9" w/4:30 gears, 8.76 @153, 3100lbs |
#25
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I thought it read .630 lobe-old eyes! I’ll still say about a grand!
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LIFT HEAVY, LIFE IS TOO SHORT TO BE SMALL! |
#26
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I'm not going to post any numbers but it was down 50hp with this cam. I'm going to make a few passes with it and see then put the old cam back in.
__________________
A new best of 9.135 @ 145.41 71 Lemans Sport. 72 Lemans Sport. |
#27
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I ran pretty much that same cam from lsm in mine, ran great. Sucks it didn't work out for you. Good luck this season.
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#28
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That's disappointing..... Sorry to hear that.
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#29
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That stinks bro, get a couple of runs to make sure the Dyno wasn't having a bad day
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#30
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From my standpoint it is hard to say what is happening due to lack of specs.
535 ci 1) 920 HP (what RPM), 278 intake and 292 exhaust on a 114 cl (what LSA), what heads (flow and valve size), what CR 2) 870 HP (what RPM), 284 intake and 306 exhaust on a 113 cl (117 LSA), what heads (flow and valve size), what CR Do run a power adder on this engine? Stan
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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 |
#31
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Quote:
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The Following User Says Thank You to slowbird For This Useful Post: | ||
#32
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The new heads are supposed to be the 430 cnc port from Kauffman same as the old heads. Compression is at 14 to 1.
__________________
A new best of 9.135 @ 145.41 71 Lemans Sport. 72 Lemans Sport. |
#33
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The new heads were bare and everything was transferred from the old heads to the new heads.
__________________
A new best of 9.135 @ 145.41 71 Lemans Sport. 72 Lemans Sport. |
#34
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At what RPM does the engine my 920 peak HP?
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 |
#35
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7200 rpm
__________________
A new best of 9.135 @ 145.41 71 Lemans Sport. 72 Lemans Sport. |
#36
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Your new cam is virtually the same as my Bullet nitrous cam. I'm running 1.75 rocker ratio. My LSA is 115 installed at 113.
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#37
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I am going to do a leak down test today after work.
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A new best of 9.135 @ 145.41 71 Lemans Sport. 72 Lemans Sport. |
#38
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I was going to say what Slowbird did, the heads are the issue.
If your leak down test shows ok then why even go thru the work of putting the motor in the car to make a few passes if the new motor is not even the equal of the old one? I guess your stuck with it for this race season, or do you still have the old heads?
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
#39
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That’s a bummer John! Where did the new heads peak this time? Same dyno as last engine? Can u share any of the dyno sheets maybe there’s something there that will help decipher what happened
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,7.33@94.55-11.502@117.74 2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, 6.314@108.39 9.950@134.32 M/T 275/60 ET SS Drag Radial 2023,(Pontiac 505) 1.27 60 ft, 5.97@112.86, 9.48@139.31.... 275/60 Radial Pro's |
#40
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I would also like to add to Stan's list of questions if you know how much vacuum was made at peak hp and the BSfC numbers from the dyno sheet?
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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