lemons12

iTrader: (71)

Just curious how much better these small bore ls3 heads would be for my combo.

My mid range is suffering from the larger valves in the L92 heads. If I could get some mid range back and achieve the top end of a ported ls3 head, that would be awesome.

If anybody has any input feel free...

lemons12

iTrader: (71)

Well maybe those are out, i saw 3500$?

How about the prc ls3? Keep the velocity up and perform better than their ported stock version.

BODUKE

That price is crazy.

BODUKE

Do stock l92's and ls3 have the same size valves?

lemons12

iTrader: (71)

Prc aftermarket ls3 castings are 2200.. Good deal if they offer the mid range i want (3500-4500 rpms) and flow as well as ported ls3s.. The 250s is probably what i would go with.
Input anybody?

Sorry boduke.. That did seem as if i was implying they were different.. They are the same less the ls3s having hollow stem valves . I exchange l92/ls3s as one in the same.

KCS

iTrader: (20)

Some cathedral ports would pick up that midrange...lol.

lemons12

iTrader: (71)

And then Im tied up with 1000$ for an intake and lacking the top end.. I've got an extra grand tied up in it for the same results.
Ill pass.

lemons12

iTrader: (71)

Thanks for the input, Im up for suggestions..

231/236 615 111... Tsps ls3 grind.

I never did want to run this cam but at that point in the build it was impossible for me to pass it up for the deal I got.

The next cam I need to be nitrous friendly 2-300 shot.

Iirc this has 11* overlap. Id think somewhere around 2-4* would be much better suited.
I have +12 pistons and stock l92s so keep that in mind with the cam suggestion. The reliefs are huge however.

low2001gmc

iTrader: (148)

what cam you got? are your heads ported? what is the whole combo period including engine, tranny and rear?

i love my set up of lq9, me ported exhaust only ls3s and lunati 232-238, 598-600, 113+4 with ls2 portworks ported l92 intake, 4l80 with fti 3800, and 4.10s....

lemons12

iTrader: (71)

231/236 615 111
Stock l92 heads
stock l76 intake
1 3/4 headers for now Will be tsp 1 7/8 soon.. 3" tsp xpipe
Ptc 3500 4l60e
373s
Normal driving is fine.. Gets up and goes quick at 2000-2500 and Im hauling *** at 3000-3500, you can feel the torque.
If you look at me previous threads find the one where i raced the red 408 trans am.. He has a cathedral setup.. I jumped out about 1-1.5 length both races and he was coming back hard from 30/40-85/90mph.. After I got back up in the rpms in 3rd gear i stopped his pull and started pulling again, he never came around. I want to get that mid range that i would have with a cathedral setup but keep my top end. If can do it with a cam swap, Im all for it.
This setup pulls hard and am very pleased in its performance for how basic it is.. Im just looking to make it a little more put together and working right... Just next mod step is all.