I’ve built 2 setups, mine and turdtegs. I have an LS with ctr pistons, crower 404s, springs/retainers. I’ve blown both of them up trying to get them tuned. My biggest problem though was too much compression. Mine came out to 13.3:1 and turdtegs was 13.5:1. Both race fuel territory which we did not use then.
There are tons of factors that go into building a motor to do a certain thing. If you want to build a motor mearly rev, maybe b/c you need a large rpm range for solo2 or something, then there are certain things you need;
A bottom end that is built to spin. Rod to stroke ratio comes into play. If you have a poor r/s ratio, like an lsvtec, then the best route is aftermarket rods or at least arp bolts to hold it together. Remember, the more r/s ratio, you have more physical rpm between the crank journal and the rod bearing surface. This also should lead you to run a better oiling system, hence why vtec motors have oil squirters, the high rpms need oil, to help heat, to save bearings.
After the bottom end is the head. it needs to flow, straight up. Your valve train you build simply to handle the high rpms and cam lift. Try picking a high duration cam without skyscraper lift. The high lift at high rpm is going to be hard on cam lobes and be more prone to float valves… not that it will, but more ‘prone’ to.
I’ve learned a lot building motors, good example is my LS which I thought I could rev just b/c i have springs/retainers and big cams. if you look at my dyno plot, it doesn’t make power for shit at high rpms. Fix? FLOW the head; (sorry, forgot this was w/o ITB’s), but you still get the idea of the head not flowing;;
http://img.photobucket.com/albums/v123/gearhead313/dynoLS.jpg
although, turdteg’s gsr… fully flowed head, skunk2stg2’s, sprigns/retainers. Even before it blew up on the dyno (sorry buddy), it would run into the 9k rev limit so hard you thought you hit a brick wall… aka the more you revved it, the more power it would make. If we would have rebuilt it, i have no doubt it would have been over 200whp. It would just smack the shit out of that limiter:::
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Since you have a b16 head, you should see good gains up to around 9k with ITB’s. The main purpose with itb’s is that you are channeling the air straight into the engine. Because you dont have runner length now, your bottom end won’t be as responsive and torquey, but the midrage will start to come alive quick. My ls will absolutely creamate teh tires (advan a032r hards) through first and the end of second.
sorry for teh mini long post,… sitting around bored on a sunday will do that 