3 Cams
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Joined: Dec 2004
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From: Kalamazoo MI
3 Cams
All, I'd like your help picking a cam. The car is an 86 auto. Mods include...ported plenum, long tube headers, Edelbrock RPM Aluminum heads, no cats, 1.5 full roller rockers, cut air lid, descreened MAF, 3.07 gears, stock convertor.
Choices...
Comp Cam 260AH-14 212/218 @ .050 .444 .444 lift w/1.5 1500 to 5500
Comp Cam X262H 218/224 @ .050 .464 .470 lift w/1.5 1500 to 5500
Comp Cam 268AH-14 222/226 @ .050 .464 .464 w/1.5 1800 to 5800
Future goals as money allows... large tube runners, after market intake manifold. Maybe a 100hp shot. Planning on a PCM chip mod for changes to date.
Drag strip 1/4 mile 3-4 times a year. Best run to date 13.90 @98mph, mostly drive on weekends to dinner, friends or whatever comes up. Don't mind a rough idle as long as it does'nt effect driveablity or computer. No emission testing in Michigan.
Thanks
Choices...
Comp Cam 260AH-14 212/218 @ .050 .444 .444 lift w/1.5 1500 to 5500
Comp Cam X262H 218/224 @ .050 .464 .470 lift w/1.5 1500 to 5500
Comp Cam 268AH-14 222/226 @ .050 .464 .464 w/1.5 1800 to 5800
Future goals as money allows... large tube runners, after market intake manifold. Maybe a 100hp shot. Planning on a PCM chip mod for changes to date.
Drag strip 1/4 mile 3-4 times a year. Best run to date 13.90 @98mph, mostly drive on weekends to dinner, friends or whatever comes up. Don't mind a rough idle as long as it does'nt effect driveablity or computer. No emission testing in Michigan.
Thanks
Drifting
Joined: Nov 2009
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From: Perth Western Australia
St. Jude Donor '10
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Joined: Dec 2004
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From: Kalamazoo MI
Drifting
Joined: Nov 2009
Posts: 1,341
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From: Perth Western Australia
St. Jude Donor '10
The stock tune seems to be handling the new combo pretty well. There is a bit of a flat spot around 1700 rpm though. Haven't datalogged it yet to see what the afr and timing is doing. Not missing or knocking though.
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Joined: Oct 2004
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From: altered state
St. Jude Donor '05
Stock converter first choice.
Would have to double check but I believe the Lunati 256 has same @050 duration specs but more lift.
Strong running cam with a TPI, lotsa torque!
Would have to double check but I believe the Lunati 256 has same @050 duration specs but more lift.
Strong running cam with a TPI, lotsa torque!
Last edited by cv67; Aug 31, 2012 at 10:55 AM.
Race Director
Joined: Apr 2003
Posts: 17,698
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From: moraga ca
Go with a roller cam and retro roller lifters. Hp to be gained with no negatives (except cost of lifters). You'll be pleased with the performance. Valves will open and shut faster, you won't have to worry about cam break in and camshaft wear, less friction, increased performance.
Last edited by 383vett; Aug 31, 2012 at 10:56 AM.
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From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
My 86e is otherwise stock except the Comp Cam X262H, springs and 1.6 CC roller tip rockers.
That is heads, block, intake, TB ...... yes its been tuned by PCMforLess. (BTW no other mods or valve covers are necessary)
The first thing you'll notice is "why didn't I change the cam years ago"!!!
Exhaust note is powerful and commanding. Not overly thumpy.
Overall power band is very noticeably increased.
I lost 1MPG.
Now she sounds like a CORVETTE should.
That is heads, block, intake, TB ...... yes its been tuned by PCMforLess. (BTW no other mods or valve covers are necessary)
The first thing you'll notice is "why didn't I change the cam years ago"!!!
Exhaust note is powerful and commanding. Not overly thumpy.
Overall power band is very noticeably increased.
I lost 1MPG.
Now she sounds like a CORVETTE should.
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Pro
Joined: Jun 2006
Posts: 508
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From: Miami Florida
If you want to make some power but still be very streetable try the Comp cam 276HR14, (part #8-305-8) its spec's are 220-230 x 510-510 with a 114 LSA. The 1.6 roller rockers get even more lift. I'm running it in mine with a 2800 stall converter and .3.54 rear gears, along with headers, Lingenfelter super ram, AFR-195 heads, and a beefed up 700R4 auto trans. It really performs between 1800-5800 rpms. I run it locally at an 1/8 mile strip and it is very consistent turning 60 ft 1.8 seconds and 7.9 to 8.0 seconds in the eighth at 87-88 mph. with MT street radials.
It's street manners are beautiful and the mileage livable at 15 in the city and 19 on the highway.
It's street manners are beautiful and the mileage livable at 15 in the city and 19 on the highway.
Last edited by stevie1dr; Sep 2, 2012 at 12:23 AM.
Thread Starter
Advanced
Joined: Dec 2004
Posts: 82
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From: Kalamazoo MI
My 86e is otherwise stock except the Comp Cam X262H, springs and 1.6 CC roller tip rockers.
That is heads, block, intake, TB ...... yes its been tuned by PCMforLess. (BTW no other mods or valve covers are necessary)
The first thing you'll notice is "why didn't I change the cam years ago"!!!
Exhaust note is powerful and commanding. Not overly thumpy.
Overall power band is very noticeably increased.
I lost 1MPG.
Now she sounds like a CORVETTE should.
That is heads, block, intake, TB ...... yes its been tuned by PCMforLess. (BTW no other mods or valve covers are necessary)
The first thing you'll notice is "why didn't I change the cam years ago"!!!
Exhaust note is powerful and commanding. Not overly thumpy.
Overall power band is very noticeably increased.
I lost 1MPG.
Now she sounds like a CORVETTE should.
383 vett...other than the added cost of the roller lifters aren't there other items that need to be addressed when going retro-roller...cam button, timing cover, distributor gear, etc??
Race Director
Joined: Apr 2003
Posts: 17,698
Likes: 1,667
From: moraga ca
I'm leaning toward the X262H cam, I should have went with 1.6 in lieu of the 1.5 rockers when i put the Aluminum heads on.
383 vett...other than the added cost of the roller lifters aren't there other items that need to be addressed when going retro-roller...cam button, timing cover, distributor gear, etc??
383 vett...other than the added cost of the roller lifters aren't there other items that need to be addressed when going retro-roller...cam button, timing cover, distributor gear, etc??