I was over at a place the other day and they were showing me a set of stage II L-98 heads they had just done. They seemed impressive to me but ill share the numbers and let yall tell me what yall think. I thought the L-98's were not the best to run. I might go by there and take some pics to show. The heads they did flowed 270 cfm on the intake side at .600 lift and 215-220 cfm on the exhaust side at .600.

 

What company was this again? Did the heads have an exhaust crossover for normal EGR function or were they the aluminum heads used on the Vette's L98?

 

wow thats not bad at all! yeah, were they the vette heads or regular iron castings?

and how much? LOL

 

Do you know what they flowed at .500 lift or at any of the lower lifts? The numbers sound quite good.

 

Im gonna go by there and take some pics and ask prices and such and get yall some info. I think they were off a 91 z-28 or vette, but could be mistaken. ADVANCED RACING DYNAMICS 832-593-9140

 

Makes a huge difference which engine they are off of, so we would need to know if you could find out for sure.

Z28 - Iron, has exhaust crossover
Vette - Aluminum, no crossover

 

here is some pics, they said they can get 250ish out of the iron L-98's

 

intake side

 

exhaust side

 

Them look nice. How much are they charging for the work?

 

Do some searching :-)

A few memebers have ported l98 heads(cast iron) to the 250-270 cfm rang on the intake and I believe near just over 200 on the exhaust or so.

They are a decent head to work with.

flow numbers are very similiar from the alum and cast iron version and both respond favorably to port work. Only downside is, they are still old school in the actual combustion chamber design. Hard to ignore them though, especially if u have them already and/or can do the work yourself or have someone that can for cheap.

I debated going this route, and I still may one day on my GTA that I plan on running my prototype TPI setup on. Just to keep with the its all stock, which it is right now.

later
Jeremy

 

dont know the exact price as these heads are not for me. i would give them a ring 832-853-9140 and ask about their different stuff they can do for you

 

From the one picture, that exhaust port looks really nice... makes me wonder...

 

well they have done heads for me before that have been over and beyond anyone else's quality and was less expensive than anyone else

 

yes the picture doesnt do it justice, its like the chambers

 

from what i understand the worst thing about the L-98 heads is the turn the intake ports make into the bowls.

 

Also the shape of the combustion chamber is old school. The Vortecs have the latest style combustion chambers as an example.

 

so the vortecs are like a ls1 com. chamber? never knew this, i didnt think there was a differance

 

Deleted reply.