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#1
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Comp 290b cam users
I'm going back to my 290b after my roller damage. I have better flowing heads now, 300 from 240 when I used it before. When degreeing this cam, where would you install it? I don't know how it was done in my old 400.
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69 Firebird 472, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 10.90 @123 |
#2
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What's the LSA?
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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule. |
#3
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106
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69 Firebird 472, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 10.90 @123 |
#4
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If have always used it straight up or 2 degrees advanced just to make up for chain stretch.
That 2 degree key is very hard to come by these days!
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I do stuff for reasons. |
#5
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Surely change out them roller lifter springs to. flat tappet springs
Will be most interesting to see same or improved performance! |
#6
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His, yes I'm going to change springs and pushrods
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69 Firebird 472, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 10.90 @123 |
#7
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That cam worked great when I used it. Installed straight up.
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#8
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Thanks, good to hear first hand.
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69 Firebird 472, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 10.90 @123 |
#9
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Yeah, it was in my car when I first broke into the 10's. 370 gear, ati 4500 converter 463" 11.5 compression e- heads. Ran best of 10.81 @124.5. Have since lowered compression and went small .420 lobe solid roller. Car was slightly faster with 290b. 10.90's now.
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#10
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Do a search in this section.
There was a guy that ran in the low 10's high 9's with that cam with 310 cfm d-ports. May have been on E85 though. |
#11
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I've seen that cam in a 450ci IA1 with edelbrocks go 9.90's in a 70 gto back in 2002.
The car was gutted with a glass hood but it wasn't super light.. it was a guy named Dalton out of Chesapeake VA.. The engine was built by Jim lehart ( not a fan so don't kill the messenger) .. it ran good.. |
#12
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Quote:
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69 Firebird 472, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 10.90 @123 |
#13
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is that this engine?
https://forums.maxperformanceinc.com...d.php?t=772253 I have some experience with that shop as well ... |
#14
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Quote:
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#15
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Quote:
since having it redone at another shop it runs great. kinda sad, i liked jim and it seemed like he did everything he could to make things right. i do not really understand what happened. |
#16
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Quote:
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69 Firebird 472, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 10.90 @123 |
#17
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Not intending to hijack but what is the minimum/maximum compression range of the 290b6?
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Johnny US Army Retired 1978 T/A 463 Pontiac, KRE 74cc 292CFM D-ports, Lunati VooDoo, V-max lifters, TKII, ATM 850 E85 carb, TCI TH-350 race tranny, 3600 converter 3.73 12 bolt 11.63@116.68mph 1981 T/A 4-speed 406 Pontiac, Merrick ported 6X heads, Comp 270S cam, Crosswind intake 750 Street Demon, 3.42 30 spline Eaton posi street car. 1980 Formula 350 Pontiac back burner project 1972 LeMans 350 Pontiac |
#18
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It depends on how many cid where dealing with also?
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I do stuff for reasons. |
#19
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I've never used them in a 400 but I put them in at 102 in the 455's.
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Jack Ferris RestoRacing LLC www.restoracing.com Sandy, UT --------------------------------------------------- |
#20
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Jack, mine is a 472 stroker, does that make a difference?
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69 Firebird 472, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 10.90 @123 |
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