Different Intake System
Thread Starter
Burning Brakes
Joined: Sep 2006
Posts: 1,142
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From: Spring Grove Illinois
Different Intake System
Well I've pulled my L98 out of my 86 coupe and will start to rebuild it ..A rod knock started this..My question is after pistons and cam mild nothing rad I would like to go to a diff intake sys..And Get rid of that underfed stock intake..I Realy don't want to go big bucks on an aftermarket ie bbk,Holley..what would you guys suggest ?? Lt1 ? What would you have to do to the ecu ? This is new to me I'm old school Tech..Any help or input would be appreciated...
Advanced
Joined: Sep 2006
Posts: 87
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From: Henryville Indiana
The lt1 intake is very similar the the TPIS miniram which was designed for the l98 tpi motor. Check out TPIS's web site. That intake makes a lot of power, but its pretty pricey. You can run a lt1 intake but it will have to modified to accept a distributer. Check out this site http://lt1intake.com/services.htm Another option is the holley stealth ram, but it won't clear a stock vette hood, but I've heard it can be modified to fit.
Good luck.
Mark
Good luck.
Mark
Burning Brakes
Joined: Feb 2001
Posts: 769
Likes: 0
From: Granbury TX
You have about eliminated everything by not wanting to go "big bucks" (you can easily tie up $1,200.00 + in an aftermarket asperation system.
If you are on a tight budget, you might consider going to a 52MM throttle body and match porting your entire plenium/tubes/manifold right to your head ports. this will give you a noticable improvement over stock an If you are handy with tools, you can do the port matching yourself. Maybe even a little bowl blending throwen in. You really need to find you a set of heads from a later modle L98,,, Maybe 89, 90 or 91. I picked up a set at a salvage yard and they have many advantages over the stock 86 cast-iron version. Port match and blend them as mentioned above for great effect. The later heads are aluminum, and besides flowing better, they disapate heat better and will allow you to set up your engine to run a hole point higher compression (ie, rather than 9 to 1, you can run 10 to 1 with the aluminum before you have problems with pre-detonation (pinging)...all else being the same.
If you are on a tight budget, you might consider going to a 52MM throttle body and match porting your entire plenium/tubes/manifold right to your head ports. this will give you a noticable improvement over stock an If you are handy with tools, you can do the port matching yourself. Maybe even a little bowl blending throwen in. You really need to find you a set of heads from a later modle L98,,, Maybe 89, 90 or 91. I picked up a set at a salvage yard and they have many advantages over the stock 86 cast-iron version. Port match and blend them as mentioned above for great effect. The later heads are aluminum, and besides flowing better, they disapate heat better and will allow you to set up your engine to run a hole point higher compression (ie, rather than 9 to 1, you can run 10 to 1 with the aluminum before you have problems with pre-detonation (pinging)...all else being the same.
Burning Brakes
Joined: Feb 2001
Posts: 769
Likes: 0
From: Granbury TX
[QUOTE=Strike3]You have about eliminated everything by not wanting to go "big bucks" (you can easily tie up $1,200.00 + in an aftermarket asperation system.
If you are on a tight budget, you might consider going to a 52MM throttle body and match porting your entire plenium/tubes/manifold right to your head ports. This will give you a noticable improvement over stock and If you are handy with tools, you can do the port matching yourself. Maybe even a little bowl blending throwen in.
You really need to find you a set of aluminum (113) heads from a later model L98,,, Maybe 89, 90 or 91. I picked up a set at a salvage yard and they have many advantages over the stock 86 cast-iron version. Port match and blend them as mentioned above for great effect. The later heads are aluminum, and besides flowing better, they disapate heat better and will allow you to set up your engine to run a hole point higher compression (ie, rather than 9 to 1, you can run 10 to 1 with the aluminum before you have problems with pre-detonation (pinging)...all else being the same.
If you are on a tight budget, you might consider going to a 52MM throttle body and match porting your entire plenium/tubes/manifold right to your head ports. This will give you a noticable improvement over stock and If you are handy with tools, you can do the port matching yourself. Maybe even a little bowl blending throwen in.
You really need to find you a set of aluminum (113) heads from a later model L98,,, Maybe 89, 90 or 91. I picked up a set at a salvage yard and they have many advantages over the stock 86 cast-iron version. Port match and blend them as mentioned above for great effect. The later heads are aluminum, and besides flowing better, they disapate heat better and will allow you to set up your engine to run a hole point higher compression (ie, rather than 9 to 1, you can run 10 to 1 with the aluminum before you have problems with pre-detonation (pinging)...all else being the same.
Burning Brakes
Joined: Feb 2001
Posts: 769
Likes: 0
From: Granbury TX
You have about eliminated everything by not wanting to go "big bucks" (you can easily tie up $1,200.00 + in an aftermarket asperation system.
If you are on a tight budget, you might consider going to a 52MM throttle body and match porting your entire plenium/tubes/manifold right to your head ports. This will give you a noticable improvement over stock and If you are handy with tools, you can do the port matching yourself. Maybe even a little bowl blending throwen in.
You really need to find you a set of aluminum (113) heads from a later model L98,,, Maybe 89, 90 or 91. I picked up a set at a salvage yard and they have many advantages over the stock 86 cast-iron version. Port match and blend them as mentioned above for great effect. The later heads are aluminum, and besides flowing better, they disapate heat better and will allow you to set up your engine to run a hole point higher compression (ie, rather than 9 to 1, you can run 10 to 1 with the aluminum before you have problems with pre-detonation (pinging)...all else being the same.[/QUOTE]
If you are on a tight budget, you might consider going to a 52MM throttle body and match porting your entire plenium/tubes/manifold right to your head ports. This will give you a noticable improvement over stock and If you are handy with tools, you can do the port matching yourself. Maybe even a little bowl blending throwen in.
You really need to find you a set of aluminum (113) heads from a later model L98,,, Maybe 89, 90 or 91. I picked up a set at a salvage yard and they have many advantages over the stock 86 cast-iron version. Port match and blend them as mentioned above for great effect. The later heads are aluminum, and besides flowing better, they disapate heat better and will allow you to set up your engine to run a hole point higher compression (ie, rather than 9 to 1, you can run 10 to 1 with the aluminum before you have problems with pre-detonation (pinging)...all else being the same.[/QUOTE]
Team Owner
Joined: Sep 2001
Posts: 62,067
Likes: 1,722
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
read my website
and its not going to come within a small budget unless you do everything yourself and buy nearly everything used, but even then the heads and intake are going to cost you
and its not going to come within a small budget unless you do everything yourself and buy nearly everything used, but even then the heads and intake are going to cost you
Burning Brakes
Joined: Apr 2005
Posts: 1,110
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From: JUPITER FLORIDA
I think if you spend the extra money you will be happy with it. It wont be hard to build somthing faster than the new c6 if you are going to start from the bottom up. Then you will have a car that is nice and speedy and didnt cost 50 g's.
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Thread Starter
Burning Brakes
Joined: Sep 2006
Posts: 1,142
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From: Spring Grove Illinois
Originally Posted by kopbet89c4
Happy MiniRam owner right here! Feel it pull strong to 5500 rpms without that "TPI" wall.
Team Owner
Joined: Sep 2001
Posts: 62,067
Likes: 1,722
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
No, you do not have a roller cam.
Roller lifters started in 87. You only have the '128 heads, which are not as good as the 88-91 heads, the '128s need some work done to them, especially with a MR going on the motor.
Roller lifters started in 87. You only have the '128 heads, which are not as good as the 88-91 heads, the '128s need some work done to them, especially with a MR going on the motor.
Safety Car
Joined: Dec 2004
Posts: 4,088
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From: Poop land
Originally Posted by Happydad
Sweeet.....O.K. I'll bite the bullet and look into some mini ram units..Oh BTW I do have alum heads they were stock on the 86 mid year along with the roller cam..Thanks For all The info
I'd swap over to some aftermarket heads if I were you.
