Why 86 odd ball
Thread Starter
Burning Brakes
Joined: Feb 2010
Posts: 1,013
Likes: 2
From: California City Ca
Why 86 odd ball
I trying to find out when I look up motor parts and other parts for my 86 Vett why it seems most parts say 1985 and earlier or 1987 and latter I don't get it.
What make the 86 a odd ball and which parts should I be looking at for motor parts for my eary 1986 L98 with Iron heads.
I want to rebuild the motor in soon but what parts should I get and can I use center bolt type heads on my 1986 L98 vett Motor.
What make the 86 a odd ball and which parts should I be looking at for motor parts for my eary 1986 L98 with Iron heads.
I want to rebuild the motor in soon but what parts should I get and can I use center bolt type heads on my 1986 L98 vett Motor.
Race Director
Joined: Sep 2003
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From: Database Error Indiana
86 was a change over year. Early 86, iron heads. Late 86 alluminum heads. 86 also got a one piece rear main seal. You can use center bolt heads. Make sure they have the correct bolt pattern for your intake. Its just the old style standard SBC intake bolt pattern. 
Max G’s
Joined: Nov 2008
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From: Monroe OH
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And I thought you didn't know jack didley
Thread Starter
Burning Brakes
Joined: Feb 2010
Posts: 1,013
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From: California City Ca
thanks this helps
Thanks that clears some issues up for me I think at least for now.
Race Director
Joined: Aug 2000
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Cruise-In II Veteran
I trying to find out when I look up motor parts and other parts for my 86 Vett why it seems most parts say 1985 and earlier or 1987 and latter I don't get it.
What make the 86 a odd ball and which parts should I be looking at for motor parts for my eary 1986 L98 with Iron heads.
I want to rebuild the motor in soon but what parts should I get and can I use center bolt type heads on my 1986 L98 vett Motor.
What make the 86 a odd ball and which parts should I be looking at for motor parts for my eary 1986 L98 with Iron heads.
I want to rebuild the motor in soon but what parts should I get and can I use center bolt type heads on my 1986 L98 vett Motor.
The 86-91 L98 Vette engines,you can reuse the stock intake manifold...it bolts right up....the L98 that came in other cars,like the camaro and firebirds,the intake manifold middle bolt holes are a little different in the 87 and up F cars.
In 1987 and later,all L98s had a roller lifters cam set up.The 86 and earlier engine has a hydraulic one.
With your 86 engine block,yes,you can use just about any good centerbolt heads should you choose to.You will need to make sure the compression and cc is ideal for your use,along with the cam you choose.
Thread Starter
Burning Brakes
Joined: Feb 2010
Posts: 1,013
Likes: 2
From: California City Ca
I just need a better understanding about the head and intake manifold I planning to change out the intake manifold anyways have to find out which one I need for centerbolt heads.
I planning to put next step hotter cam set Comp Cam Dur 256/268 Lift 447/454 Rpm range 1000 to 5200d Edelbrock heads ans intake.
I mite make it a 383 stroker.
This is a CA and I still have get by smog check.
I planning to put next step hotter cam set Comp Cam Dur 256/268 Lift 447/454 Rpm range 1000 to 5200d Edelbrock heads ans intake.
I mite make it a 383 stroker.
This is a CA and I still have get by smog check.
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Le Mans Master
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From: Phoenix AZ
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85 engines got lower fuel pressure and 24 LB injectors, forged pistons, 2 bolt block.
The only differences early 1986 engines had that was different from 85 and earlier was the one piece seal, right hand dipstick and newer oil pan and pan rails. There was a switch to cast pistons, they still had 2 bolt mains, and the 76cc iron heads with revised valve seals, and nylon cam gear.
late 86 got roller cam block with 2 bolt mains, roller cam, centerbolt aluminum heads with 58cc chambers, dished pistons, iron timing chain, guided rockers, right hand dipstick, one piece seal, and newer style harmonic balancer.
in late 88 they switched to 113 heads from the 128 heads, dropped the cold start injector in 89.
They continued this till 90 when they reprogrammed the computer chip, used the MAP sensor, used flat top pistons with revised timing and the 58cc heads.
The only differences early 1986 engines had that was different from 85 and earlier was the one piece seal, right hand dipstick and newer oil pan and pan rails. There was a switch to cast pistons, they still had 2 bolt mains, and the 76cc iron heads with revised valve seals, and nylon cam gear.
late 86 got roller cam block with 2 bolt mains, roller cam, centerbolt aluminum heads with 58cc chambers, dished pistons, iron timing chain, guided rockers, right hand dipstick, one piece seal, and newer style harmonic balancer.
in late 88 they switched to 113 heads from the 128 heads, dropped the cold start injector in 89.
They continued this till 90 when they reprogrammed the computer chip, used the MAP sensor, used flat top pistons with revised timing and the 58cc heads.
Last edited by coupeguy2001; Mar 14, 2010 at 12:36 AM.
Race Director
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I just need a better understanding about the head and intake manifold I planning to change out the intake manifold anyways have to find out which one I need for centerbolt heads.
I planning to put next step hotter cam set Comp Cam Dur 256/268 Lift 447/454 Rpm range 1000 to 5200d Edelbrock heads ans intake.
I mite make it a 383 stroker.
This is a CA and I still have get by smog check.
I planning to put next step hotter cam set Comp Cam Dur 256/268 Lift 447/454 Rpm range 1000 to 5200d Edelbrock heads ans intake.
I mite make it a 383 stroker.
This is a CA and I still have get by smog check.
If you buy heads meant for a Corvette,say 86L-87 aluminum,or simply the 88-91 Vette aluminum D port heads,they all use the same sbc intake bolt pattern.The F cars,the Camaro and Firebird,87 and up L98,has a different intake bolt set up in the heads and intake manifold.
That said,alot of aftermarket intakes are pre drilled to bolt on to BOTH Either the 87 and up camaro/firebird L98 or the 85 and up Vette L98.
Race Director
Joined: Aug 2000
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There is no L86,its an L98.
The late L98 '86-87 aluminum heads,the 128 style,are not the same as the 113 heads that came out in 88-91.Very similar,but not the same design.Same intake bolt pattern though.
Race Director
Joined: Aug 2000
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Cruise-In II Veteran
85 engines got lower fuel pressure and 24 LB injectors, forged pistons, 2 bolt block.
The only differences early 1986 engines had that was different from 85 and earlier was the one piece seal, right hand dipstick and newer oil pan and pan rails. There was a switch to cast pistons, they still had 2 bolt mains, and the 76cc iron heads with revised valve seals, and nylon cam gear.
late 86 got roller cam block with 2 bolt mains, roller cam, centerbolt aluminum heads with 58cc chambers, dished pistons, iron timing chain, guided rockers, right hand dipstick, one piece seal, and newer style harmonic balancer.
in late 88 they switched to 113 heads from the 128 heads, dropped the cold start injector in 89.
They continued this till 90 when they reprogrammed the computer chip, used the MAP sensor, used flat top pistons with revised timing and the 58cc heads.
The only differences early 1986 engines had that was different from 85 and earlier was the one piece seal, right hand dipstick and newer oil pan and pan rails. There was a switch to cast pistons, they still had 2 bolt mains, and the 76cc iron heads with revised valve seals, and nylon cam gear.
late 86 got roller cam block with 2 bolt mains, roller cam, centerbolt aluminum heads with 58cc chambers, dished pistons, iron timing chain, guided rockers, right hand dipstick, one piece seal, and newer style harmonic balancer.
in late 88 they switched to 113 heads from the 128 heads, dropped the cold start injector in 89.
They continued this till 90 when they reprogrammed the computer chip, used the MAP sensor, used flat top pistons with revised timing and the 58cc heads.
The L86 still used a hydraulic cam.87 was the first year they installed the roller lifters.
Le Mans Master
Joined: Oct 2008
Posts: 9,758
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From: Houston Texas
I meant late 86 .. mine had 113 heads but I didn't buy it new.
Le Mans Master
Joined: Feb 2000
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From: Kempner Texas
Also, my early iron headed 86 Vette had a four bolt block, one piece rear main seal and a flat tappet hydraulic cam.
When I re-built it - came out a 355 - I installed Edelbrock Performer RPM aluminum heads and the intake fit without any issue.
Jake
When I re-built it - came out a 355 - I installed Edelbrock Performer RPM aluminum heads and the intake fit without any issue.
Jake
Thread Starter
Burning Brakes
Joined: Feb 2010
Posts: 1,013
Likes: 2
From: California City Ca
Will heads alone help.
Did you use the stock intake if so did the heads alone improved the over rev the motor just neds to pull a little longer untill red line mine starts falling on it face about 4500 RPM's.
I don't want a high reving motor just some more over rev.
I don't want a high reving motor just some more over rev.