87 L98 Superram Intake Swap - Worthwhile?
02-16-2011, 06:26 PM
#41
Drifting
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St. Jude Donor '10
Do I get the AFR 195 eliminator competition heads or the street heads? 65cc or 75cc? roller cam valve springs etc? Best price I have so far is $1439 US free delivery within US. Do the 0.1" raised exhaust ports cause an issue?
Last edited by Lemme; 02-20-2011 at 03:00 AM.
02-16-2011, 06:43 PM
#42
Melting Slicks
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YellowEarl (01-10-2023)
02-16-2011, 07:29 PM
#44
Race Director
With my 4L60E, the shift points are pre-programmed by a laptop. Leave it in drive, hit the go pedal and the car does the rest.
02-16-2011, 07:47 PM
#45
Melting Slicks
02-16-2011, 07:58 PM
#46
Drifting
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St. Jude Donor '10
I have the hydraulic shift version 4l60. Apparently the shift points can be adjusted mechanically. Not sure how though.
Last edited by Lemme; 02-16-2011 at 08:15 PM.
02-16-2011, 08:47 PM
#49
On the driver's side rear of the main transmission case there is a large black steel cover.
Pry or tap the cover off with a screwdriver and the governor assembly is underneath.
Can be done with the transmission still in the car.
You can buy aftermarket governor assemblies with a higher shift point.
Or you can custom tailor your shift points by purchasing a B&M Governor kit for your trans.
Thats if you want higher fully automatic upshifts at the track or on the street.
Last edited by 87 vette 81 big girl; 02-16-2011 at 08:50 PM.
02-16-2011, 08:48 PM
#50
Melting Slicks
On the cam, you don't want to over cam it. I wouldn't go much past 220 intake duration on a 350 S.R. Too much cam gives up torque, and makes the same top end hp
02-16-2011, 09:01 PM
#51
Melting Slicks
Yea I'm going with a 221/230 cam on the 396. But I'm able to use a little more duration because of the larger displacement. I'm also able to pass California smog tests. Like Jim says, it's very important to match the rpm range of the cam to the intake. Otherwise you give up bottom end and don't get anything back on the top end.
02-16-2011, 09:08 PM
#53
Drifting
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St. Jude Donor '10
Yea I'm going with a 221/230 cam on the 396. But I'm able to use a little more duration because of the larger displacement. I'm also able to pass California smog tests. Like Jim says, it's very important to match the rpm range of the cam to the intake. Otherwise you give up bottom end and don't get anything back on the top end.
02-16-2011, 09:13 PM
#54
Drifting
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St. Jude Donor '10
Automatic Shift points in your 1987 Corvette 700R4 are controlled by the Mechanical Governor.
On the driver's side rear of the main transmission case there is a large black steel cover.
Pry or tap the cover off with a screwdriver and the governor assembly is underneath.
Can be done with the transmission still in the car.
You can buy aftermarket governor assemblies with a higher shift point.
Or you can custom tailor your shift points by purchasing a B&M Governor kit for your trans.
Thats if you want higher fully automatic upshifts at the track or on the street.
On the driver's side rear of the main transmission case there is a large black steel cover.
Pry or tap the cover off with a screwdriver and the governor assembly is underneath.
Can be done with the transmission still in the car.
You can buy aftermarket governor assemblies with a higher shift point.
Or you can custom tailor your shift points by purchasing a B&M Governor kit for your trans.
Thats if you want higher fully automatic upshifts at the track or on the street.
Last edited by Lemme; 02-16-2011 at 09:17 PM.
02-16-2011, 09:41 PM
#55
Makes for more driving fun and more consistent 1/4 mile times left to shift automatically for you.
Till you get plenty of driving time at the dragstrip.
Then you can play around and experiment shifting the 700R4 trans manually yourself for faster times if desired.
Never take your foot off the gas unless your going to crash!
LOL
Getting off the gas pedal only slows your 1/4 mile run.
Brian
02-16-2011, 09:47 PM
#56
"Do I get the AFR 195 eliminator competition heads or the street heads? 65cc or 75cc"
One thing to keep in mind is those heads take two different intake manifold gaskets. The Eliminator takes the Felpro 1205 gasket and the Competition version takes the Felpro 1206 gasket. You had better make sure your intake manifold has a large enough area to properly seat a Felpro 1206 gasket. Chances are it might not.
One thing to keep in mind is those heads take two different intake manifold gaskets. The Eliminator takes the Felpro 1205 gasket and the Competition version takes the Felpro 1206 gasket. You had better make sure your intake manifold has a large enough area to properly seat a Felpro 1206 gasket. Chances are it might not.
02-16-2011, 09:55 PM
#58
Melting Slicks
"Do I get the AFR 195 eliminator competition heads or the street heads? 65cc or 75cc"
One thing to keep in mind is those heads take two different intake manifold gaskets. The Eliminator takes the Felpro 1205 gasket and the Competition version takes the Felpro 1206 gasket. You had better make sure your intake manifold has a large enough area to properly seat a Felpro 1206 gasket. Chances are it might not.
One thing to keep in mind is those heads take two different intake manifold gaskets. The Eliminator takes the Felpro 1205 gasket and the Competition version takes the Felpro 1206 gasket. You had better make sure your intake manifold has a large enough area to properly seat a Felpro 1206 gasket. Chances are it might not.
02-16-2011, 09:59 PM
#59
Melting Slicks
02-16-2011, 10:36 PM
#60
Melting Slicks
Good point! The ports on the 195 street heads match perfectly with the Super Ram ports. When I installed the Super Ram on my 195 Street heads the 1205 gaskets were a little too big. I ended up using a 1256 gasket. With the 1205's the blue seal on the gasket was showing.
The AFR 195 street heads already outflow the super ram by a good margin, so there isn't any value in spending the extra money for the comp 195 heads. And like mentioned, the 195 street heads ports line up with a super ram.
Last edited by tpi 421 vette; 02-16-2011 at 11:37 PM.