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Looking for a cam

 
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William Jones
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Joined: 30 Jan 2006
Posts: 822
Location: Lake city, FL
28514.86 points


1971 Ford Mustang

PostPosted: Wed Apr 07, 2010 7:21 pm    Post subject: Looking for a cam Reply with quote

I just started on a motor for a friend it is a 350 sbc 85 4 bolt block.

4.035 bore forged flat top
scat 9000 crank
scat I beam rods with cap screws
internal balance
the heads are 87 L-98 I will do a little port work to them but nothing major.

Looking for some suggestions on a good shelf cam hyd or solid Flat tappet.
RPM air gap intake
Edelbrock 650 carb
700r4 trans
3000 stall
3.73 gears
Mostly strip 87 IROC with T-tops should weigh around 3400 with driver when we get some weight out of it.

Springs and heads will be bought and machined for the cam selection. Just wondering what some of you guys run with this kind of setup. Before everybody starts about the heads he knows they aren't the right part but they came with the car and he wants to get on the track this year so he is going to use what he has. He wants to get it in the 12's

Bam

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92 LX 454ci Clevor 9.24@142.53 N/A
71 Mach1 454ci Clevor 10.16@134 N/A 3850lbs race weight "Lost in fire"
03 Cobra Bone stock 12.42
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clay
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Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Wed Apr 07, 2010 10:48 pm    Post subject: Reply with quote

My first 350 was similar to yours. Differences were untouched Sportsman II's that I'm thinking don't really flow much more that your L-98 heads with a little clean up. Ran a Victor Jr. because I had a plate system and had heard bad things about distribution issues with a dual plane. Plus the RPM Air Gap didn't exist yet. Compression was just under 9.5 - 1. I ran a Lunati mechanical flat tappet. Duration at 0.050" was 239* in and 249* ex. Lift was 0.517" in and 0.543" as well as I can remember. Lobe seperation was 106*. It was a very torquey setup - you could shift anywhere in about a 1000 rpm window and it didn't really make much difference at all. It has a wicked idle and vacuum was about 5 1/2" inches. Car weighed around 3500 with me in it at the time. 4.11 gears, TH350, 10" TCI Streetfighter, 26 x 8.5 slicks, 750 vacuum secondary (this was faster than a 650 DP which I thought would be the perfect carburetor). Best 1/8 mile e.t. was a 7.96 (about mid 12's) on motor and a 7.01 (calculates to high 10's but it wouldn't make it with the gear / tire combo) with a 180 shot. I don't remember the mph. Clay
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squeeezer
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Joined: 02 Mar 2007
Posts: 2427
Location: new richmond WI
191524.76 points


1991 Chevrolet Camaro

PostPosted: Thu Apr 08, 2010 2:39 am    Post subject: Reply with quote

i used comp cams xr288hr10
only diff is i use gmpp fast burn heads
less compression (i assume your motor is around 10.5 to 1 give or take)
n/a mine got to the 12.2's
this is in an identicle car/set-up and a 750 holley

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jeep_406
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Joined: 12 Sep 2002
Posts: 1661
Location: Tewksbury, Mass 01876
53123.48 points


1972 Chevrolet Nova

PostPosted: Thu Apr 08, 2010 12:51 pm    Post subject: Reply with quote

Bill,
A hydraulic flat tappet cam that worked well for me was a Comp Cams Extreme Energy XE284H but I had it in a 406. Ran a best of 11.80's in a 3700 pound car with a 4.10 gear and a 700R4 with a 3K stall. I must say the weather was excellent. As I remember it was below sea level. Driving Gotta love New England in the fall.

Duration @ 0.50 is 240/246
Lift with 1.5 rockers .507/.510
I used 1.6 rockers .541/.544
Lobe Sep 110 degrees
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squeeezer
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Joined: 02 Mar 2007
Posts: 2427
Location: new richmond WI
191524.76 points


1991 Chevrolet Camaro

PostPosted: Thu Apr 08, 2010 4:25 pm    Post subject: Reply with quote

[quote="jeep_406"]Bill,
A hydraulic flat tappet cam that worked well for me was a Comp Cams Extreme Energy XE284H





this was the next step up from a xe274 right? it would be a good cam for a 355
i ran that cam on a .060 over 350 still made great torque with a 2200 stall (on the ass dyno)in the similar car....no 1/4 times though

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jeep_406
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Joined: 12 Sep 2002
Posts: 1661
Location: Tewksbury, Mass 01876
53123.48 points


1972 Chevrolet Nova

PostPosted: Thu Apr 08, 2010 7:03 pm    Post subject: Reply with quote

Yes, it's the next one up from the XE274H. That would probably be a decent cam for the 350.
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William Jones
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Joined: 30 Jan 2006
Posts: 822
Location: Lake city, FL
28514.86 points


1971 Ford Mustang

PostPosted: Thu Apr 08, 2010 8:46 pm    Post subject: Reply with quote

Thanks for the input guys I will let you know what we go with.

Bam

_________________
Take the horse out off the barn and let her RUN BABY RUN!!!!!

92 LX 454ci Clevor 9.24@142.53 N/A
71 Mach1 454ci Clevor 10.16@134 N/A 3850lbs race weight "Lost in fire"
03 Cobra Bone stock 12.42
68 Falcon 363ci 10.55@126 N/A
95 GT 363ci 11.08@118 N/A
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squeeezer
Member


Joined: 02 Mar 2007
Posts: 2427
Location: new richmond WI
191524.76 points


1991 Chevrolet Camaro

PostPosted: Fri Apr 09, 2010 12:01 pm    Post subject: Reply with quote

jeep_406 wrote:
Yes, it's the next one up from the XE274H. That would probably be a decent cam for the 350.







it was for a street 350
i still believe your suggestion is better with the xe284
i assume bill will need more cam for those heads

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