Is there a better cam?

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Racer18
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Is there a better cam?

Post by Racer18 » Wed Feb 14, 2018 5:07 pm

I am using a 246/252@ 050 cam ground on a 106lsa. .577 intake lift with 1.6 rocker, .544 ex lift with 1.5. 355 ci, 6.250 rods, 49cc dart heads, 3cc domes. Runs good, won a ton of races with it. Time for a freshen. I would like to make more top end power, but dont want to kill low end. I run it 6800-7200 rpms. Any suggestions?

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Re: Is there a better cam?

Post by statsystems » Wed Feb 14, 2018 6:55 pm

Racer18 wrote:
Wed Feb 14, 2018 5:07 pm
I am using a 246/252@ 050 cam ground on a 106lsa. .577 intake lift with 1.6 rocker, .544 ex lift with 1.5. 355 ci, 6.250 rods, 49cc dart heads, 3cc domes. Runs good, won a ton of races with it. Time for a freshen. I would like to make more top end power, but dont want to kill low end. I run it 6800-7200 rpms. Any suggestions?

Define low end. At that RPM you should have a 5500 converter so anything below that is moot (for lack of a better word).

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Re: Is there a better cam?

Post by hoffman900 » Wed Feb 14, 2018 7:00 pm

Racer18 wrote:
Wed Feb 14, 2018 5:07 pm
I am using a 246/252@ 050 cam ground on a 106lsa. .577 intake lift with 1.6 rocker, .544 ex lift with 1.5. 355 ci, 6.250 rods, 49cc dart heads, 3cc domes. Runs good, won a ton of races with it. Time for a freshen. I would like to make more top end power, but dont want to kill low end. I run it 6800-7200 rpms. Any suggestions?
You should probably define what kind of racing you're doing first.
-Bob

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Re: Is there a better cam?

Post by Warp Speed » Wed Feb 14, 2018 7:11 pm

From his cylinder head thread, I assume it's a 2bl limited short track deal?
If that is the case, to answer both of the threads, it's all gonna be in the valve job and valve train! Lol
Angle mill to the max, a modern valve job and similar events but about .150 or so more lift.
Then there's the short block.................

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Re: Is there a better cam?

Post by ZIGGY » Wed Feb 14, 2018 7:34 pm

Warp Speed wrote:
Wed Feb 14, 2018 7:11 pm
Angle mill to the max
'Til you can shave with the edge... :lol:

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Re: Is there a better cam?

Post by Racer18 » Wed Feb 14, 2018 11:00 pm

Oops! Yes, it's a dirt stock car. No roller cams allowed. 500 cfm carb.

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Re: Is there a better cam?

Post by F-BIRD'88 » Thu Feb 15, 2018 12:51 am

Before you take it apart, first tighten up the valve lash to about .014" set cold and try a few laps.
Do you like that effect. ?? If so change to this cam Isky 201547 .look it up.
Be sure to degree it in at a 102 intake C/L. It will have more top end without getting too carried away. It is 10deg bigger @.050" and a bit more lift. same 106LSA.

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Re: Is there a better cam?

Post by Racer18 » Thu Feb 15, 2018 7:36 am

It's already apart, actually it was pretty tired. 8 seasons on it.NO JOKE! I built it, raced it myself for 3 years, sold out, its been through 3 other owners, current owner called to ask if I would freshen it/ update it. Oil pan has never been off. There are alot of 400+ cubic inch engines in the class now. I just want to see if we can compete with this one!

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Re: Is there a better cam?

Post by pdq67 » Thu Feb 15, 2018 8:10 am

What engine are you using?

I ask because of a 6.25" long rod in a 355 is all.

I assume it isn't a stock block Gen. I SBC, right?

Or can you put a 6.25" long rod in a 3.25" stroked 355" SBC? Don't think so, but don't know either...

pdq67

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Re: Is there a better cam?

Post by Stan Weiss » Thu Feb 15, 2018 10:30 am

pdq67 wrote:
Thu Feb 15, 2018 8:10 am
What engine are you using?

I ask because of a 6.25" long rod in a 355 is all.

I assume it isn't a stock block Gen. I SBC, right?

Or can you put a 6.25" long rod in a 3.25" stroked 355" SBC? Don't think so, but don't know either...

pdq67
3.48" stroke
6.25" rod
1.21" Compression height piston

9.2" deck height block.

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Do you use engine simulation software that uses cylinder head flow files?
We have a package of more than 3000 DFW or FLW Files

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Re: Is there a better cam?

Post by CamKing » Thu Feb 15, 2018 10:35 am

Racer18 wrote:
Wed Feb 14, 2018 11:00 pm
Oops! Yes, it's a dirt stock car. No roller cams allowed. 500 cfm carb.
It all depends on the RPM you're coming off the corner.
If it's below 4,000rpm, we normally go with a 248/252 on a 105.
If it's 4,500rpm or above, we go with a 253/256 on a 106.
Mike Jones
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jonescams@bellsouth.net
http://www.jonescams.com
(704)489-2449

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Re: Is there a better cam?

Post by fast_crew » Thu Feb 15, 2018 11:46 pm

Give Mike Jones a call and give him all your info, you won't be disappointed.
Josh K.

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Re: Is there a better cam?

Post by MadBill » Fri Feb 16, 2018 9:37 pm

Stan Weiss wrote:
Thu Feb 15, 2018 10:30 am
pdq67 wrote:
Thu Feb 15, 2018 8:10 am
What engine are you using?

I ask because of a 6.25" long rod in a 355 is all.

I assume it isn't a stock block Gen. I SBC, right?

Or can you put a 6.25" long rod in a 3.25" stroked 355" SBC? Don't think so, but don't know either...

pdq67
3.48" stroke
6.25" rod
1.21" Compression height piston

9.2" deck height block.

Stan
9.2"? Surely this is a stock 9.025" deck block, hence a 1.035" CH for zero deck?
Felix, qui potuit rerum cognscere causas.

Happy is he who can discover the cause of things.

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Re: Is there a better cam?

Post by Racer18 » Sat Feb 17, 2018 11:16 pm

It is a 1" ch, zero deck@ 9.00. 1550 bob weight with steel rods. Outran a lot of 412-415 ci engines, but they have stepped up their game since we last ran this combo.

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Re: Is there a better cam?

Post by Krooser » Fri Feb 23, 2018 7:14 pm

fast_crew wrote:
Thu Feb 15, 2018 11:46 pm
Give Mike Jones a call and give him all your info, you won't be disappointed.
My kids b mod motor has amazing power off the corners... Call Mike.
Last place in the B-main is better than anyplace in the grandstands...

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