L98 Mods
Thread Starter
Racer
Joined: Sep 2011
Posts: 445
Likes: 11
From: Indiana
L98 Mods
To start I got a 89 Corvette coupe automatic bone stock. I want to keep the stock bottom and TPI setup cause 383 super ram setup are way outta my budget. Was gonna get my Plenum and base plate ported with maybe asm or some large tube runners. Tpis headers as well. My questions are. Are the 113 heads worth getting ported? Or save for AFR 195? Which cam do I get to work with the heads and TPI setup I want. I'd like
aggressive cammed sound. I know Ill need a stall to. Thanks for any advice in advance
aggressive cammed sound. I know Ill need a stall to. Thanks for any advice in advance
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
Hi there, what's your budget ? what's your goal ?
The bad thing of the TPI long runner setup is that they doesn't breathe well
on the high rpms, if you are going to stay LTR i can recommend the Lingenfelter 211 camshaft
http://www.lingenfelter.com/mm5/merc...gory_Code=C244
AFR 195 would be cool with a better intake , AFR180 if you are going to stay ltr
im sure more members will chime in !
btw i don't think you'll get too much of an aggressive sound with the 211 and a good tune
The bad thing of the TPI long runner setup is that they doesn't breathe well
on the high rpms, if you are going to stay LTR i can recommend the Lingenfelter 211 camshaft
http://www.lingenfelter.com/mm5/merc...gory_Code=C244
AFR 195 would be cool with a better intake , AFR180 if you are going to stay ltr
im sure more members will chime in !
btw i don't think you'll get too much of an aggressive sound with the 211 and a good tune
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
Without other modifications, the AFR 195 would be too large. Go with the AFR 180's.
Suggest you read Vader86's web site. There is a wealth of information there for you to digest before you start buying parts and making changes.
Suggest you read Vader86's web site. There is a wealth of information there for you to digest before you start buying parts and making changes.
Burning Brakes
Joined: Jun 2008
Posts: 892
Likes: 1
From: New Smyrna Beach Florida
To start I got a 89 Corvette coupe automatic bone stock. I want to keep the stock bottom and TPI setup cause 383 super ram setup are way outta my budget. Was gonna get my Plenum and base plate ported with maybe asm or some large tube runners. Tpis headers as well. My questions are. Are the 113 heads worth getting ported? Or save for AFR 195? Which cam do I get to work with the heads and TPI setup I want. I'd like
aggressive cammed sound. I know Ill need a stall to. Thanks for any advice in advance
aggressive cammed sound. I know Ill need a stall to. Thanks for any advice in advance
Thread Starter
Racer
Joined: Sep 2011
Posts: 445
Likes: 11
From: Indiana
Thanks for advice. I've owned the car since August of this year. The car runs great made one pass at the strip and ran a 14.0 @ 97 mph spinning pretty bad in first and some second.
Would putting lingenfelter super ram and 219 cam work on stock 350 bottom anyone? Thanks again guys
Would putting lingenfelter super ram and 219 cam work on stock 350 bottom anyone? Thanks again guys
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
JImbo has a good point
Another vote for the 180 head thats plenty for a ported TPI system with a smallish torque cam. It will run strong with headers.
Make sure and upgrade injectors and get a good tune.
Your stock TB is fine no need for a larger one.
Another vote for the 180 head thats plenty for a ported TPI system with a smallish torque cam. It will run strong with headers.
Make sure and upgrade injectors and get a good tune.
Your stock TB is fine no need for a larger one.
Max G’s
Joined: Nov 2008
Posts: 2,751
Likes: 78
From: Monroe OH
NCM Sinkhole Donor
If you're bone stock now, I'd start with exhaust first. Replace the cat back exhaust and cat converter to high flow cat or if area allows it, do away with it. Here are some other low cost items you can do that won't be too expensive. Cut air filter lid, install under drive pulleys, install large tube runners, and smog pump delete if your area allows. You may want to check your rear gear ratio and see which one you have. A 3.07 is probably the optimum for an 700r4. Be careful steping into a cam too quick, the extra power can stress the stock trans. 
Instructor
Joined: Nov 2011
Posts: 183
Likes: 0
i like a lt1 gm impalla ss or caprice cam for tpi with 1.6 rockers the work perfect up the injector size to about 24-26 summit has the best deal on injectors porting the intake behind the throttle body does wonders a air foil by pass the coolent threw the throttle body and upgade valve springs if u do cam and rockers id just have the stock heads redone and do some porting unless u change the intakeset up tpi make torque at low rpms a gear swap also wouldnt hurt
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Team Owner
Joined: Jan 2003
Posts: 20,290
Likes: 239
From: Summerland B.C. Canada
Super Ram/Mini Ram, cam and exhaust will put a smile on your face, and can be had for a little more than some AFR heads. 
I'm using the factory 128 heads on my Super Ram 355, and it did very well against another members 383 with AFR Eliminators.
I'm using the factory 128 heads on my Super Ram 355, and it did very well against another members 383 with AFR Eliminators.
Race Director
Joined: Jun 2004
Posts: 13,939
Likes: 705
From: WI
113's can be nice if you don't spend a fortune paying others to make them flow. If you have to pay a mint then buy AFR's. I have a third of the cost of new heads into my 113's and they have done well. The car will run 11's.
Advanced
Joined: Dec 2010
Posts: 64
Likes: 0
From: Orange So Cal
All catalytic converters have been free flow since around 1981, they come with a monolithic core (you can see right thru them). They used to be pellet type with baffles, not anymore.
Some companies were putting HIGH FLOW on their boxes and California made them remove that. The law says you can't change the cat until after the car has 50k or more, unless it is bad.
HTH
Advanced
Joined: Nov 2011
Posts: 99
Likes: 0
From: Budd Lake New Jersey
To start I got a 89 Corvette coupe automatic bone stock. I want to keep the stock bottom and TPI setup cause 383 super ram setup are way outta my budget. Was gonna get my Plenum and base plate ported with maybe asm or some large tube runners. Tpis headers as well. My questions are. Are the 113 heads worth getting ported? Or save for AFR 195? Which cam do I get to work with the heads and TPI setup I want. I'd like
aggressive cammed sound. I know Ill need a stall to. Thanks for any advice in advance
aggressive cammed sound. I know Ill need a stall to. Thanks for any advice in advance
, haha for a cam check out the ZZ4 cam or ZZ9 those work surprisingly well with the L98. I wanted the aggressive chunky sound cam too but found out that what those cams are used for, are NOTHING what you really want, most of those cams are for higher rpm power band, you'll fail emissions hands down. depends what you want to do, i recommend anybody who has the l98 to keep the stock cam and work around it you can save more money and gain much more. If your going for better flow heads AFR really knows there sh*t, I checked em out a while ago but couldn't afford em n got summit T-6 heat treated aluminum heads, id start off with headders first thatch probably gonna be the pain, especially that dipstick since it has to be removed :x whatever brand you get dont make the mistake i made, get them, wrap em with thermo heat tape REAL good, double wrap em! haha! keep your egine bay cool as possible, with that said next work around cooling, air fuel ratio, maybe advance tuning, some nice gears and you should be good to go!
Last edited by Iown1badvette; Nov 27, 2011 at 12:24 PM.
Advanced
Joined: Nov 2011
Posts: 99
Likes: 0
From: Budd Lake New Jersey
Hi there, what's your budget ? what's your goal ?
The bad thing of the TPI long runner setup is that they doesn't breathe well
on the high rpms, if you are going to stay LTR i can recommend the Lingenfelter 211 camshaft
http://www.lingenfelter.com/mm5/merc...gory_Code=C244
AFR 195 would be cool with a better intake , AFR180 if you are going to stay ltr
im sure more members will chime in !
btw i don't think you'll get too much of an aggressive sound with the 211 and a good tune
The bad thing of the TPI long runner setup is that they doesn't breathe well
on the high rpms, if you are going to stay LTR i can recommend the Lingenfelter 211 camshaft
http://www.lingenfelter.com/mm5/merc...gory_Code=C244
AFR 195 would be cool with a better intake , AFR180 if you are going to stay ltr
im sure more members will chime in !
btw i don't think you'll get too much of an aggressive sound with the 211 and a good tune
This is great advice
sit down and try to be specific as possible about what every function you want your engine to do.
Advanced
Joined: Nov 2011
Posts: 60
Likes: 0
From: Mountain Home, AFB Idaho
Just want to add a side note here:
All catalytic converters have been free flow since around 1981, they come with a monolithic core (you can see right thru them). They used to be pellet type with baffles, not anymore.
Some companies were putting HIGH FLOW on their boxes and California made them remove that. The law says you can't change the cat until after the car has 50k or more, unless it is bad.
HTH
All catalytic converters have been free flow since around 1981, they come with a monolithic core (you can see right thru them). They used to be pellet type with baffles, not anymore.
Some companies were putting HIGH FLOW on their boxes and California made them remove that. The law says you can't change the cat until after the car has 50k or more, unless it is bad.
HTH
as for your statement about replacing, i would love to see the cfr reference for that. as an owner, you can do whatever you like within your states, counties, and cities laws. fed's apply only to manufacturer and repair shops when it comes to deleting emission controls, not you or me.
long tubes, a full exhaust, and a cam will do wonders
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
I just bought a front Y pipe for my '86. Many that I looked at said they couldn't ship to California. The only one I could find that's legal in California is a Magnaflow 37487.
I just had a smog check about a month ago. The guy checked for front cats (I watched him), so no cheating there. They're getting pretty technical now. He hooked up a machine to my gas tank and ran some kind of test that took quite a while, about 10 minutes. Fortunately my 25 year old gas cap passed...
I just had a smog check about a month ago. The guy checked for front cats (I watched him), so no cheating there. They're getting pretty technical now. He hooked up a machine to my gas tank and ran some kind of test that took quite a while, about 10 minutes. Fortunately my 25 year old gas cap passed...
