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  #1  
Old 07-17-2022, 11:37 AM
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Default 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, Bullet SFT, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 11.14@120
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  #2  
Old 07-17-2022, 04:52 PM
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What's the LSA?

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1967 Firechicken, 499", Edl heads, 262/[email protected]" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. [email protected] mph with a 1.45 60'. Still WAY under the rollbar rule.
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  #3  
Old 07-17-2022, 07:50 PM
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106

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Old 07-18-2022, 06:25 AM
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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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  #5  
Old 07-18-2022, 08:08 AM
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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!

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  #6  
Old 07-18-2022, 02:03 PM
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His, yes I'm going to change springs and pushrods

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472, Bullet SFT, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 11.14@120
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  #7  
Old 07-19-2022, 09:08 AM
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That cam worked great when I used it. Installed straight up.

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  #8  
Old 07-19-2022, 10:32 AM
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Quote:
Originally Posted by RJRjr View Post
That cam worked great when I used it. Installed straight up.

Thanks, good to hear first hand.

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472, Bullet SFT, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 11.14@120
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  #9  
Old 07-19-2022, 11:13 AM
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Quote:
Originally Posted by 461-69bird View Post
Thanks, good to hear first hand.
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  
Old 07-19-2022, 06:21 PM
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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.

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  #11  
Old 07-20-2022, 12:31 AM
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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..

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  #12  
Old 07-20-2022, 05:05 AM
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Quote:
Originally Posted by Scott Roberts View Post
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..
It was Jim who built my previous engine with the 290b in.

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  #13  
Old 07-20-2022, 09:20 AM
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Quote:
Originally Posted by 461-69bird View Post
It was Jim who built my previous engine with the 290b in.
is that this engine?

https://forums.maxperformanceinc.com...d.php?t=772253

I have some experience with that shop as well ...

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  #14  
Old 07-20-2022, 10:04 AM
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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 ...
What year was that and how did it go? I ask for a specific reason...

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  #15  
Old 07-20-2022, 10:42 AM
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What year was that and how did it go? I ask for a specific reason...
approx 2009-2013. as i recall it lost a solid flat cam, blew a head gasket, broke a rocker stud (which i think took out the solid roller cam), and threw a rod through the pan driving down the interstate.

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.

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  #16  
Old 07-20-2022, 01:46 PM
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Quote:
Originally Posted by i82much View Post
is that this engine?

https://forums.maxperformanceinc.com...d.php?t=772253

I have some experience with that shop as well ...
Yes that was mine.

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472, Bullet SFT, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 11.14@120
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Old 07-20-2022, 09:00 PM
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Not intending to hijack but what is the minimum/maximum compression range of the 290b6?

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  #18  
Old 07-21-2022, 06:26 AM
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It depends on how many cid where dealing with also?

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  #19  
Old 07-21-2022, 01:13 PM
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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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  #20  
Old 07-21-2022, 07:06 PM
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Quote:
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I've never used them in a 400 but I put them in at 102 in the 455's.
Jack, mine is a 472 stroker, does that make a difference?

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472, Bullet SFT, KRE 85cc, Victor, 850xp, TH400, TSP 9.5" 4800, 3.90 10 bolt, Viking DA rears, QA1 single fronts, 3558lbs. best to date 11.14@120
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