I am planning a few things for the L98. 1st off I am changing to a Team-G intake and holley 750 vs carb. I will be using 200 Dart Iron Eagles 64cc. The heads will have 2.02/1.06 valves, guide plates and Comp Pro Mag roller rockers.

I will be using the comp xtream xe282hr cam, and new timing chain and gear.

I wont to do this all on the stock bottom end. Will it hold up.

Also I will be running a 700R4 with a 3000 stall, 3.73 gears and 26" dot tires.

What do you guys think of this setup? I ran it on DD2000 and came up with some good numbers.

Do you all see any problem with this. I will be changing to a 355 later on and will use the same parts I listed.

thanks for any advice.

 

I hope it does, cause I'm about to do the same thing. My set up is similiar to yours. L98 block short block, 305 heads currently, xr269hr cam, 3.73 gears. I am about to get the Iron eagles also maybe this week. Anyway I have about 5000 miles on the motor now and have reved the **** out of it quite a few times. Even with the 305 heads and stock intake manifold it pulls good to 6000 rpm. The 3.73s with my T5 and not very sticky Goodyears I am running have caused me to over rev it due to traction issues more than a few times. So far it doesn't seam to have suffered any from it. Time will tell.

 

yeah, I am hoping it will be ok. I plan on maybe redoing the bottom end this fall. but I would like to just do the cam, head and intake swap right now. maybe go to a 383 later. I will sell the cam, but the rest I can use.

were are you getting your heads from? I am getting mine bare and picking the parts I want to use in them.

 

I e-mailed the guy selling these and asked what he would sell bare casting for and it was damn cheap.

http://cgi.ebay.com/ebaymotors/ws/eB...tem=1875768239

The winning bidder on that one got a deal if you ask me.

 

Nope, it won't hold up at all

Tim

 

Im taking that as a yes.

DD2000 shows right at 475 hp at the flywheel. Not to bad of a setup for the price.

 

it could hold up.... don't run too much timing you dont want ne detonation at all cuz that could really kill your pistons and rods....but if you go easy on it for the most part and run high octane it could handle it.... how long it will handle it is the real question tho.

 

well, Looks like the engine funds have gone up in smoke.

Dont look like I will be able to do the heads and cam. I will go ahead and do the exhaust, intake and carb swap. I have the gears, just need to get them put in.

I never was that luck, so I should have figured something would happen.

Thanks for the advice guys. I will keep this in mind when I get the chance to build it. but for now it will have to stay slightly modified.

 

I feel your pain. Two days ago I was ready to make the plunge and get the Iron Eagles. Then life happened and the money is gone. I'm trying to talk myself into charging them. I need to get my wife to talk me out of it. I just can't stand knowing all these LS1 cars are on the road that can out run me stock

 

yeah, I know what you mean. Here I have a set of Hedman LT's , Team-g intake, and a holley 750 just setting here. I might as well fix the intake to fit the stock heads and put the carb on. I can muster up the money to do that and finish the exhaust. This should help some.

I just wish I could change the cam while I have the intake off. I wonder what cam I could use with the stock L98 heads? I would like to at least get the LT4 hotcam, but I think I would have to get head work done.

Anyone got any suggestion on what cam with stock L98 heads?

 

The real question is what cam to use with the stock L98 springs. The HOT cam has too much lift to use with the stock springs. Don't waste your money on a cam right now. Wait until you can do the heads and then do the heads and cam at the same time. There's really no point in doing a cam right now. It's a waste of time and a waste of money since the heads are crap and will need new springs anyhow.

Just MHO ...

Tim

 

Ye, I agree with Traxion. You would need stiffer springs. And I'm not sure if the ones GM sells with the LT4 hot cam would fit in the stock size pockets on the heads and if their installed height would work with your current valves. And if they do fit are the guides low enough to keep from hitting the spring retainers.

And if you plan on adding the heads next year with a larger cam than the LT4 hot cam anyway I would just save all my money for that.

I can't believe no one has replied yet telling you to port your stock heads. Where is Sitting Bull?

 

Well, I just priced having the heads done for screw in studs and guide plates, and having the spring pockets redone. $100.

I may go ahead and have this done and get the cam and springs I will use with the dart heads.

I just wonder what these heads will do with better springs, studs, and maybe the comp xe274hr or the xe282hr cam?

 

Well, he is really wanting to crank out the hp with a roller cam and all. The Dart heads might be a better idea for a drag only engine, which is what this sounds like.

Still, you can support a good 500 hp with ported and polished L98 heads, as long as you go all out on the porting and use THE optimum combination of parts.

This sort of engine is not going to be a whole lot of fun to drive every day, though.

 

If you don't want to port them yourself, just for grins see what they would charge for a little bowl porting. Maybe you could add a few more cfm to your flow while getting the spring pockets done.